# EDGAR Filing Document

**Accession Number:** 0001268533
**File Stem:** 0001213900-26-059544
**Filing Date:** 2026-5
**Character Count:** 404441
**Document Hash:** 1d65d66183a8282c893defd751e7acb2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-059544.hdr.sgml**: 20260520

**ACCESSION NUMBER**: 0001213900-26-059544

**CONFORMED SUBMISSION TYPE**: 424B2

**PUBLIC DOCUMENT COUNT**: 18

**FILED AS OF DATE**: 20260520

**DATE AS OF CHANGE**: 20260520

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TORTOISE ENERGY INFRASTRUCTURE CORP
- **CENTRAL INDEX KEY:** 0001268533

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** 424B2
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295680
- **FILM NUMBER:** 261004321

**BUSINESS ADDRESS:**
- **STREET 1:** 5901 COLLEGE BOULEVARD
- **STREET 2:** SUITE 400
- **CITY:** OVERLAND PARK
- **STATE:** KS
- **ZIP:** 66211
- **BUSINESS PHONE:** 913-981-1020

**MAIL ADDRESS:**
- **STREET 1:** 5901 COLLEGE BOULEVARD
- **STREET 2:** SUITE 400
- **CITY:** OVERLAND PARK
- **STATE:** KS
- **ZIP:** 66211

?xml version='1.0' encoding='ASCII'?

#### Filed Pursuant to Rule 424(b)(2) Registration Statement No. 333-295680

#### PROSPECTUS SUPPLEMENT
(to Base Prospectus dated May 8, 2026)

**7,043,198 Shares of Common Stock**

**Tortoise Energy Infrastructure Corporation**

**Issuable Upon Exercise of Transferable Rights to Subscribe for Shares of Common Stock**

Tortoise Energy Infrastructure Corporation (the "Company," "we" or "us") is a non-diversified, closed-end management investment company.

We are issuing transferable rights ("Rights") to our common stockholders of record as of the close of business on May 20, 2026 (the "Record Date") entitling the holders of such Rights to subscribe for an aggregate of 7,043,198 shares of common stock, par value $0.001 per share (the "Common Shares") (the "Offer").

Holders of our Common Shares on the Record Date will receive one Right for each outstanding Common Share held on the Record Date. The Rights entitle their holders to purchase one new Common Share for every three Rights held (1-for-3). Any Record Date stockholder who owns fewer than three Common Shares as of the Record Date may subscribe, at the Subscription Price, for one full Common Share in the Offer. In addition, Record Date stockholders who fully exercise their Rights (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) will be entitled to subscribe for additional Common Shares that remain unsubscribed as a result of any unexercised Rights. This over-subscription privilege is subject to a number of limitations and subject to allotment.

The subscription price per Common Share to be issued in the Offer (the "Subscription Price") will be determined based on a formula equal to 92.5% of the average of the last reported sale price of a Common Share on the New York Stock Exchange ("NYSE") on the date on which the Offer expires, as such date may be extended from time to time, and each of the four (4) preceding trading days (the "Formula Price"). If, however, the Formula Price is less than 90% of the average of the net asset value ("NAV") per Common Share at the close of trading on the NYSE on the Expiration Date and each of the four (4) preceding trading days, then the Subscription Price will be 90% of the average of the Company's NAV per Common Share at the close of trading on the NYSE on the Expiration Date and each of the four (4) preceding trading days. The Company will pay a sales load on the Subscription Price. The Offer will expire at 5:00 p.m. Eastern time on June 17, 2026, unless extended as described in this Prospectus Supplement (the "Expiration Date").

Rights holders will not know the Subscription Price at the time of exercise and will be required initially to pay for both the Common Shares subscribed for pursuant to the primary subscription and, if eligible, any additional Common Shares subscribed for pursuant to the over-subscription privilege at the estimated Subscription Price of $43.64 and, except in limited circumstances, will not be able to rescind their subscription.

You should review the information set forth under "Principal Investment Risks" and "Additional Risk of Subscription Rights" in the accompanying Prospectus before investing in our Common Shares.

---

| | | |
|:---|:---|:---|
|  | **Per Share** | **Total<sup>(1)</sup>** |
|  Estimated Subscription Price<sup>(2)</sup> | $43.64 | $307365161 |
|  Underwriting discounts and commissions<sup>(2)(3)</sup> | $1.36 | $9577542 |
|  Proceeds, before expenses, to the Company<sup>(2)(4)</sup> | $42.28 | $297787619 |

---

____________

(1)&nbsp;&nbsp;&nbsp;&nbsp; Assumes that all Rights are exercised at the estimated Subscription Price. All of the Rights may not be exercised.

------

(2)&nbsp;&nbsp;&nbsp;&nbsp; The fees and expenses of the Offer will be borne by the Company and indirectly by all of its common stockholders, including those who do not exercise their Rights, and will result in a reduction of the Company's NAV. Offering expenses borne by the Company (including the reimbursements described below) are estimated to be approximately $835,000 in the aggregate, or $0.12 per Common Share (assuming the Rights are fully exercised). The Company has agreed to pay the Dealer Manager up to $175,000 as a partial reimbursement for its expenses incurred in connection with the Offer. Offering expenses will be borne by the Company and indirectly by all of its common stockholders, including those who do not exercise their Rights.

(3)&nbsp;&nbsp;&nbsp;&nbsp; UBS Securities LLC will act as dealer manager for the Offer (the "Dealer Manager"). The Company has agreed to pay the Dealer Manager a fee for its financial structuring and soliciting services equal to 3.50% of the Subscription Price issued pursuant to the exercise of Rights, including the over-subscription privilege, on gross proceeds raised in the Offer up to $150,000,000, plus 2.75% of the Subscription Price issued pursuant to the exercise of Rights, including the over-subscription privilege, on gross proceeds raised in the Offer in excess of $150,000,000. Based on the estimated Subscription Price, this Dealer Manager fee would amount to $1.36 per Common Share and a total sales load of $9,577,542, assuming all Rights are exercised. The Dealer Manager will reallow a part of its fees to other broker-dealers that have assisted in soliciting the exercise of the Rights. The Dealer Manager fee will be borne by the Company and indirectly by all of its Common Stockholders, including those who do not exercise their Rights. See "Plan of Distribution."

(4)&nbsp;&nbsp;&nbsp;&nbsp; Offering expenses borne by the Company are estimated to be approximately $835,000 in aggregate or $0.12 per Common Share (assuming the Rights are fully exercised). The Company has agreed to pay the Dealer Manager up to $175,000 as a partial reimbursement for its expenses incurred in connection with the Offer. Offering expenses will be borne by the Company and indirectly by all of its Common Stockholders, including those who do not exercise their Rights.

You should read this Prospectus Supplement and the accompanying Prospectus before deciding whether to invest in our Common Shares and retain it for future reference. The Prospectus Supplement and the accompanying Prospectus contain important information about us. Material that has been incorporated by reference and other information about us can be obtained from our investment adviser's website at *www.tortoisecapital.com*, or from the Securities and Exchange Commission's ("SEC") website (*http://www.sec.gov*).

**Exercising your Rights and investing in the Common Shares involves a high degree of risk. See "Risk Factors" on page 26 of the accompanying Prospectus.**

**Common Stockholders who do not fully exercise their Rights should expect, upon completion of the Offer, to own a smaller proportional interest in the Company than before the Offer. Further, if the net proceeds per Common Share from the Offer are at a discount to the Company's NAV per Common Share, this Offer will reduce the Company's NAV per Common Share.**

**Neither the SEC nor any state securities commission has approved or disapproved of these securities or determined if this Prospectus Supplement or the accompanying Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.**

Common Shares are expected to be ready for delivery in book-entry form through the Depository Trust Company on or about June 25, 2026 unless the Offer is extended.

#### UBS Investment Bank
This Prospectus Supplement is dated May 20, 2026.

------

**You should rely only on the information contained or incorporated by reference in this Prospectus Supplement and the accompanying Prospectus. We have not authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not making an offer to sell these securities in any jurisdiction in which the offer or sale is not permitted.**

In this Prospectus Supplement and in the accompanying Prospectus, unless otherwise indicated, "Company," "us," "our" and "we" refer to Tortoise Energy Infrastructure Corporation, a Maryland corporation. This Prospectus Supplement also includes trademarks owned by other persons.

The Company has declared a monthly distribution payable on May 29, 2026 to stockholders of record on May 22, 2026, and a monthly distribution payable on June 30, 2026, to stockholders of record as of June 3, 2026. Any Common Shares issued pursuant to the Offer will not be record date shares for the monthly distributions to be paid on May 29, 2026 or June 30, 2026 and will not be entitled to receive either distribution.

NAV dilution resulting from the Offer is not currently determinable because it is not known how many Common Shares will be subscribed for, what the NAV or market price of the Common Shares will be on the Expiration Date or what the Subscription Price will be. Any such dilution will disproportionately affect non-exercising stockholders. If the Subscription Price is substantially less than the then current NAV, this dilution could be substantial. However, assuming all of the Common Shares are sold at the estimated Subscription Price (which includes a sales load) and after deducting all expenses related to the issuance of the Common Shares, the Company NAV per Common Share as of May 13, 2026, which serves as the reference point for this calculation, would be reduced by approximately $1.63 or 3.3%. The distribution to stockholders of transferable Rights, which themselves have intrinsic value, will afford non-participating Record Date common stockholders the potential of receiving cash payment upon the sale of the Rights, receipt of which may be viewed as partial compensation for any dilution of their interests that may occur as a result of the Offer. There can be no assurance that a market for the Rights will develop or, if such a market develops, what the price of the Rights will be. See "Risks Relating to the Offer" in this Prospectus Supplement. Except as described herein, Rights holders will have no right to rescind their subscriptions after receipt of their payment for Common Shares by the Subscription Agent for the Offer.

*Investment Objective.&nbsp;&nbsp;&nbsp;&nbsp;*Our investment objective is to seek a high level of total return with an emphasis on current distributions paid to stockholders. We cannot assure you that we will achieve our investment objective.

*Investment Strategy.&nbsp;&nbsp;&nbsp;&nbsp;*Under normal circumstances, we invest at least 90% of our total investments, defined as the value of all investments reported as total investments in our schedule of investments, in securities of energy infrastructure companies. Energy infrastructure companies engage in the business of transporting, processing, storing, distributing or marketing natural gas, natural gas liquids, coal, crude oil or refined petroleum products, or exploring, developing, managing or producing such commodities. Additionally energy infrastructure includes renewables and power infrastructure companies that generate, transport and distribute electricity.

We may incur leverage to the extent permitted by the 1940 Act.

*Listing and Symbol.&nbsp;&nbsp;&nbsp;&nbsp;*Our currently outstanding Common Shares are, and the Common Shares offered by this Prospectus Supplement and the accompanying Prospectus, will be, subject to notice of issuance, listed on the NYSE under the symbol "TYG." As of May 13, 2026, the NAV per share of the Company's Common Shares was $48.68, and the last reported sale price of a Common Share on the NYSE on that day was $46.08, representing a discount to NAV of (5.3)%. The Rights will be, subject to notice of issuance, admitted for trading on the NYSE under the symbol "TYG RT" during the course of the Offer. Trading in the Rights on the NYSE may be conducted until the close of trading on the NYSE on the last business day prior to the Expiration Date.

Our securities do not represent a deposit or obligation of, and are not guaranteed or endorsed by, any bank or other insured depository institution and are not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Capitalized terms used herein that are not otherwise defined shall have the meanings assigned to them in the accompanying Prospectus.

------

#### **TABLE OF CONTENTS**

#### Prospectus Supplement

---

| | |
|:---|:---|
|  | **Page** |
|  [Summary of the Terms of the Rights Offering](#T001) | S-1 |
|  [Summary of Fees and Expenses](#T002) | S-5 |
|  [capitalization](#T003) | S-7 |
|  [Use of Proceeds](#T004) | S-8 |
|  [DESCRIPTION OF THE OFFER](#T005) | S-9 |
|  [MARKET AND NET ASSET VALUE INFORMATION](#T006) | S-18 |
|  [RISKS RELATING TO THE OFFER](#T007) | S-19 |
|  [PLAN OF DISTRIBUTION](#T008) | S-21 |
|  [Taxation](#T009) | S-24 |
|  [Legal Matters](#T010) | S-27 |
|  [INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM](#T011) | S-27 |

---

#### Prospectus

---

| | |
|:---|:---|
|  [Cautionary Notice Regarding Forward-Looking Statements](#T9901) | ii |
|  [Prospectus Summary](#T9902) | 1 |
|  [Summary of Company Expenses](#T9903) | 9 |
|  [Financial Highlights](#T9904) | 10 |
|  [Senior Securities](#T9905) | 11 |
|  [Market and Net Asset Value Information](#T9906) | 13 |
|  [Use of Proceeds](#T9907) | 14 |
|  [The Company](#T9908) | 15 |
|  [Investment Objective and Principal Investment Strategies](#T9909) | 16 |
|  [Leverage](#T9910) | 24 |
|  [Risk Factors](#T9911) | 26 |
|  [Management of the Company](#T9912) | 36 |
|  [Closed-End Company Structure](#T9913) | 39 |
|  [Certain Federal Income Tax Matters](#T9914) | 40 |
|  [Determination of Net Asset Value](#T9915) | 45 |
|  [Automatic Dividend Reinvestment and Cash Purchase Plan](#T9916) | 47 |
|  [Description of Securities](#T9917) | 49 |
|  [Certain Provisions in the Company's Charter and Bylaws](#T9918) | 57 |
|  [Plan of Distribution](#T9919) | 59 |
|  [Administrator and Custodian](#T9920) | 62 |
|  [Legal Matters](#T9921) | 63 |
|  [Available Information](#T9922) | 63 |
|  [Incorporation by Reference](#T9923) | 63 |

---

S-i

#### CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS
This Prospectus Supplement and the accompanying Prospectus and the Statement of Additional Information ("SAI") contain "forward-looking statements." Forward-looking statements can be identified by the words "may," "will," "intend," "expect," "estimate," "continue," "plan," "anticipate," "could," "should" and similar terms and the negative of such terms. Such forward-looking statements may be contained in this Prospectus Supplement as well as in any accompanying Prospectus. By their nature, all forward-looking statements involve risks and uncertainties, and actual results could differ materially from those contemplated by the forward-looking statements. Several factors that could materially affect our actual results are the performance of the portfolio of securities we hold, the conditions in the U.S. and international financial, petroleum and other markets, the price at which our shares will trade in the public markets and other factors discussed in our periodic filings with the Securities and Exchange Commission.

Although we believe that the expectations expressed in our forward-looking statements are reasonable, actual results could differ materially from those projected or assumed in our forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to change and are subject to inherent risks and uncertainties, such as those disclosed in the "Risk Factors" section of the accompanying Prospectus. All forward-looking statements contained or incorporated by reference in this Prospectus Supplement or any accompanying Prospectus are made as of the date of this Prospectus Supplement or the accompanying Prospectus, as the case may be. Except for our ongoing obligations under the federal securities laws, we do not intend, and we undertake no obligation, to update any forward-looking statement. The forward-looking statements contained in this Prospectus Supplement and the accompanying Prospectus are excluded from the safe harbor protection provided by Section 27A of the Securities Act of 1933, as amended (the "1933 Act").

Currently known risk factors that could cause actual results to differ materially from our expectations include, but are not limited to, the factors described in the "Risk Factors" section of the accompanying Prospectus. We urge you to review carefully that section for a more detailed discussion of the risks of an investment in our securities.

S-ii

#### Summary of the Terms of the Rights Offering
*This is only a summary of information contained elsewhere in this Prospectus Supplement and the accompanying Prospectus. This summary does not contain all of the information that you should consider before investing in the Company's Common Shares. You should carefully read the more detailed information contained in this Prospectus Supplement and the accompanying Prospectus and the SAI, dated May 8, 2026, especially the information set forth under the headings "Investment Objective and Principal Investment Strategies" and "Risk Factors."*

---

| | |
|:---|:---|
|  **Terms of the Offer** | Holders of our shares of common stock, par value $0.001 per share, (the "Common Shares") on the Record Date (as defined below) will receive one right for each Common Share owned on the Record Date, and are entitled to purchase one Common Share at the Subscription Price (as defined below) for each three rights held (the "Offer"). No fractional shares will be issued. Record Date common stockholders holding fewer than three Common Shares will be entitled to purchase one full Common Share. *See "Important Terms of the Offer."* |
|  **Amount Available for Primary <br>Subscription** | <br>Approximately $307,365,161 |
|  **Title** | Subscription Rights to Purchase Shares of Common Stock |
|  **Subscription Price** | The subscription price for the Common Shares (the "Subscription Price") will be determined based on a formula equal to 92.5% of the average of the last reported sale price of a Common Share on the NYSE on the Expiration Date (as defined below) and each of the four (4) preceding trading days (the "Formula Price"). If, however, the Formula Price is less than 90% of the average of the NAV per Common Share at the close of trading on the NYSE on the Expiration Date, as such date may be extended from time to time, and each of the four (4) preceding trading days, then the Subscription Price will be 90% of the average of the Company's NAV per Common Share at the close of trading on the NYSE on the Expiration Date, as such date may be extended from time to time, and each of the four (4) preceding trading days. In each case, NAV will be calculated as of the close of trading on the NYSE on the applicable day. Because the Expiration Date of the subscription period will be June 17, 2026 (unless the subscription period is extended), Rights holders will not know the Subscription Price at the time of exercise and will be required initially to pay for both the Common Shares subscribed for pursuant to the primary subscription and, if eligible, any additional Common Shares subscribed for pursuant to the over-subscription privilege at the estimated Subscription Price of $43.64 per Common Share and, except in limited circumstances, will not be able to rescind their subscription. *See "Description of the Offer."* |
|  **Record Date** | Rights will be issued to holders of record of the Company's Common Shares at the close of business on May 20, 2026 (the "Record Date"). *See "Description of the Offer."* |
|  **Number of Rights Issued** | One right will be issued in respect of each Common Share of the Company outstanding on the Record Date. *See "Description of the Offer."* |

---

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| | |
|:---|:---|
|  **Number of Rights Required to Purchase One Common Share** | <br>The Rights entitle their holders to purchase one Common Share for every three Rights held (1-for-3). The Company will not issue fractional Common Shares upon the exercise of Rights; accordingly, Rights may be exercised only in multiples of three and fractional shares will be rounded down to the nearest whole number, except that any stockholder as of the Record Date that owns fewer than three Common Shares as of the close of business on the Record Date is entitled to subscribe for one Common Share in the Offer. *See "Description of the Offer."* |
|  **Over-Subscription Privilege** | Record Date common stockholders who exercise all the Rights issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) are entitled to subscribe for additional Common Shares at the same Subscription Price pursuant to the over-subscription privilege, subject to certain limitations and subject to allotment. If sufficient remaining Common Shares are available following the primary subscription, all Record Date common stockholders' over-subscription requests will be honored in full. Investors who are not Record Date common stockholders, but who otherwise acquire Rights pursuant to the Offer, are not entitled to subscribe for any Common Shares pursuant to the over-subscription privilege. If sufficient Common Shares are not available to honor all over-subscription requests, unsubscribed Common Shares will be allocated pro rata among those Record Date common stockholders who over-subscribe based on the number of Common Shares they owned on the Record Date. *See "Over*-Subscription *Privilege."* |
|  **Subscription Period** | The Rights may be exercised at any time after issuance and prior to expiration of the Rights, which will be 5:00 p.m. Eastern time on June 17, 2026 (the "Expiration Date"), unless otherwise extended (the "Subscription Period"). *See "Description of the Offer."* |
|  **Offer Expenses** | The expenses of the Offer are expected to be approximately $835,000. *See "Use of Proceeds."* |
|  **Sale and Transferability of Rights** | The Rights will be, subject to notice of issuance, admitted for trading on the NYSE under the symbol "TYG RT" during the course of the Offer. Trading in the Rights on the NYSE may be conducted until the close of trading on the NYSE on the last business day prior to the Expiration Date. The Company will use its best efforts to ensure that an adequate trading market for the Rights will exist, although there can be no assurance that a market for the Rights will develop. Assuming a market exists for the Rights, the Rights may be purchased and sold through usual brokerage channels or sold through the Subscription Agent (as defined in this Prospectus Supplement). |
|  | Record Date common stockholders who do not wish to exercise any of the Rights issued to them pursuant to the Offer may instruct the Subscription Agent to try to sell any unexercised Rights. Although the Rights are expected to trade on the NYSE through the last business day prior to the Expiration Date, subscription certificates representing the Rights to be sold through the Subscription Agent must be received by the Subscription Agent by 5:00 p.m. Eastern time on June 10, 2026 (or, if the subscription period is extended, by 5:00 p.m. Eastern time on the fifth business day prior to the extended Expiration Date). Upon the timely receipt by the Subscription Agent of appropriate instructions to sell Rights, the |

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| | |
|:---|:---|
|  | Subscription Agent will ask the Dealer Manager if it will purchase the Rights. If the Dealer Manager purchases the Rights, the sales price paid by the Dealer Manager will be based upon the then-current market price for the Rights. If the Dealer Manager declines to purchase the Rights of a Record Date common stockholder that have been duly submitted to the Subscription Agent for sale, the Subscription Agent will attempt to sell such Rights in the open market. |
|  | Alternatively, the Rights evidenced by a subscription certificate may be transferred until the Expiration Date in whole or in part by endorsing the subscription certificate for transfer in accordance with the accompanying instructions. *See "Sale and Transferability of Rights."* |
|  **Method for Exercising Rights** | Rights are evidenced by subscription certificates that will be mailed to Record Date stockholders (except as described below under "Description of the Offer — Requirements for Foreign Stockholders") or, if their Common Shares are held by Cede & Co. or any other depository or nominee, to Cede & Co. or such other depository or nominee. Rights may be exercised by completing and signing the subscription certificate and mailing it in the envelope provided, or otherwise delivering the completed and signed subscription certificate to the Subscription Agent, together with payment in full of the estimated Subscription Price for the Common Shares subscribed for. Completed subscription certificates and payments must be received by the Subscription Agent by 5:00 p.m. Eastern time on the Expiration Date at the offices of the Subscription Agent. Rights also may be exercised by contacting your broker, banker, trust company or other intermediary, which can arrange, on your behalf, to guarantee delivery of payment and of a properly completed and executed subscription certificate. A fee may be charged for this service by your broker, bank, trust company or other intermediary. In addition, your broker, bank, trust company or other intermediary may impose a deadline for exercising Rights earlier than 5:00 p.m. Eastern time on the Expiration Date. *See "Description of the Offer — Method for Exercising Rights"* and *"Description of the Offer — Payment for Common Shares."* |
|  | Rights holders who have exercised their Rights will have no right to rescind their subscription after receipt by the Subscription Agent of the completed subscription certificate together with payment for the Common Shares subscribed for. See "*Description of the Offer.*" |
|  **Use of Proceeds** | We estimate the net proceeds of the Offer to be approximately $296,952,619. This figure is based on the estimated Subscription Price of $43.64 and assumes all new Common Shares offered are sold and that the expenses related to the Offer estimated at approximately $835,000 are paid after deduction of underwriting discounts and commissions. We intend to use the net proceeds of the offering to invest in accordance with our investment objective and policies and for general corporate purposes. We anticipate that the net proceeds will be invested promptly as investment opportunities are identified, depending on market conditions, and it is anticipated to take not more than three months from the completion of this offering. Pending investment, it is anticipated that the proceeds will be invested in short-term or long-term securities of the U.S. government or its agencies or instrumentalities or high quality, short-term money market instruments. *See "Use of Proceeds."* |

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| | |
|:---|:---|
|  **Distribution Arrangements** | UBS Securities LLC (the "Dealer Manager") will act as Dealer Manager for this Offer. Under the terms and subject to the conditions contained in the Dealer Manager Agreement among the Dealer Manager, the Company and the Investment Adviser, the Dealer Manager will provide financial structuring services in connection with the Offer and will solicit the exercise of Rights and participation in the over-subscription privilege. The Company has agreed to pay the Dealer Manager a fee for its financial structuring and soliciting services equal to 3.50% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege, up to $150,000,000 and 2.75% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege, over $150,000,000. The Company has also agreed to pay the Dealer Manager up to $175,000 as a partial reimbursement for its reasonable out-of-pocket expenses incurred in connection with the Offer, including reasonable out-of-pocket fees and expenses, if any and not to exceed $10,000, incurred by the Dealer Manager, Selling Group Members, Soliciting Dealers and other brokers, dealers and financial institutions in connection with their customary mailing and handling of materials related to the Offer to their customers. The fees paid to the Dealer Manager and other expenses of the Offer will be borne by the Company and indirectly by all of its Common Stockholders, including those who do not exercise their Rights. The Dealer Manager will reallow a portion of its fees to other broker-dealers who have assisted in soliciting the exercise of Rights. The Company and the Investment Adviser have each agreed to indemnify the Dealer Manager for losses arising out of certain liabilities, including liabilities under the Securities Act of 1933, as amended (the "Securities Act"). |
|  | Prior to the expiration of the Offer, the Dealer Manager may independently offer for sale Common Shares it has acquired through purchasing and exercising the Rights, at prices it sets. Although the Dealer Manager may realize gains and losses in connection with purchases and sales of Common Shares, such offering of Common Shares is intended by the Dealer Manager to facilitate the Offer, and any such gains or losses are not expected to be material to the Dealer Manager. The Dealer Manager's fee for its financial structuring and soliciting services is independent of any gains or losses that may be realized by the Dealer Manager through the purchase and exercise of the Rights and the sale of Common Shares. See "*Plan of Distribution.*" |
|  **Investment Adviser** | Tortoise Capital Advisors, L.L.C. is our investment adviser. The Adviser's address is 5901 College Boulevard, Suite 400, Overland Park, Kansas 66211. As of April 30, 2026, the Adviser had approximately $11.0 billion of client assets under management. |
|  **Taxation/ERISA** | *See "Taxation — U.S. Federal Income Tax Considerations" and "Taxation — Employee Benefit Plan Considerations."* |

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#### Summary of Fees and Expenses
The following tables are intended to assist you in understanding the various costs and expenses directly or indirectly associated with investing in our Common Shares as a percentage of net assets attributable to Common Shares. Annual Expenses are based on amounts for the fiscal year ended November 30, 2025, after giving effect to anticipated net proceeds of the offering, assuming that we incur the estimated offering expenses. If the Company issues fewer Common Shares in the Offer and the net proceeds to the Company are less, all other things being equal, the total annual expenses shown would increase.

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| | |
|:---|:---|
|  Sales Load (as a percentage of offering price) | 3.12%<sup>(1)</sup> |
|  Offering Expenses Borne by the Company (as a percentage of offering price) | 0.27%<sup>(2)</sup> |
|  Dividend Reinvestment and Cash Purchase Plan Fees (in dollars) | $15<br><sup>(3)</sup> |

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| | |
|:---|:---|
|  **Annual Expenses (as a percentage of net assets attributable to common stock)** | **Percentage <br>of Net Assets <br>Attributable <br>to Common <br>Shares<sup>(4)</sup>** |
|  Management Fee<sup>(5)</sup> | 1.16% |
|  Interest Payments on Borrowed Funds (includes issuance costs)<sup>(6)</sup> | 0.57% |
|  Distribution Payments on Preferred Stock (includes issuance costs)<sup>(7)</sup> | 0.16% |
|  Other Expenses<sup>(8)</sup> | 0.47% |
|  Total Annual Expenses (excluding tax liability) | 2.36% |

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____________

(1)&nbsp;&nbsp;&nbsp;&nbsp; The Dealer Manager will receive a fee for its financial structuring and soliciting services equal to 3.50% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege, up to $150 million and 2.75% of the Subscription Price over $150 million. The Dealer Manager will reallow to broker-dealers in the selling group to be formed and managed by the Dealer Manager selling fees equal to 2.00% of the Subscription Price for each Common Share issued pursuant to the Offer as a result of their selling efforts. In addition, the Dealer Manager will reallow to other broker-dealers that have executed and delivered a soliciting dealer agreement and have solicited the exercise of Rights solicitation fees equal to 0.50% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights as a result of their soliciting efforts, subject to a maximum fee based on the number of Common Shares held by each broker-dealer through The Depository Trust Company ("DTC") on the Record Date.

(2)&nbsp;&nbsp;&nbsp;&nbsp; The fees and expenses of the Offer will be borne by the Company and indirectly by all of its common stockholders, including those who do not exercise their Rights, and will result in a reduction of the Company's NAV. Offering expenses borne by the Company (including the reimbursements described below) are estimated to be approximately $835,000 in the aggregate, or $0.12 per Common Share (assuming the Rights are fully exercised). The Company has agreed to pay the Dealer Manager up to $175,000 as a partial reimbursement for its expenses incurred in connection with the Offer. Offering expenses will be borne by the Company and indirectly by all of its common stockholders, including those who do not exercise their Rights.

(3)&nbsp;&nbsp;&nbsp;&nbsp; Stockholders will pay a transaction fee of $15 plus brokerage charges if they direct the Plan Agent to sell Common Shares held in a Plan account. See "Automatic Dividend Reinvestment and Cash Purchase Plan" in the Prospectus.

(4)&nbsp;&nbsp;&nbsp;&nbsp; Based on net assets attributable to Common Shares during the fiscal year ended November 30, 2025, and after giving effect to the Offer, assuming that the Offer is fully subscribed resulting in the receipt of net proceeds from the Offer of approximately $297 million.

(5)&nbsp;&nbsp;&nbsp;&nbsp; Reflects management fee as of November 30, 2025, after giving effect to the anticipated net proceeds of the offering and estimated offering expenses. "Management Fee" is based on its Managed Assets, which means the average daily gross asset value of the Company (which includes assets attributable to the principal amount of any borrowings), minus accrued liabilities (other than the principal amount of such borrowings), and reflects an annual rate of 0.95% of average monthly Managed Assets up to $2.5 billion, 0.90% of average monthly Managed Assets between $2.5 billion and $3.5 billion, and 0.85% of average monthly Managed Assets above $3.5 billion. There is no investment advisory agreement with, or management fees charged to, any Subsidiary.

(6)&nbsp;&nbsp;&nbsp;&nbsp; Reflects actual cost of interest on the debt securities and unsecured credit facility as of November 30, 2025, including amortization of issuance costs.

(7)&nbsp;&nbsp;&nbsp;&nbsp; Reflects actual cost of distributions on Outstanding MRP Shares as of November 30, 2025, including amortization of issuance costs.

(8)&nbsp;&nbsp;&nbsp;&nbsp; "Other Expenses" reflects actual costs incurred as of fiscal period ended November 30, 2025 for operational expenses, including payments to our transfer agent, administrator, custodian, fund account and legal and accounting expenses, adjusted to give effect to the anticipated net proceeds of the offering and estimated offering expenses, where applicable.

#### Example
The following example demonstrates the hypothetical dollar amount of total cumulative expenses that would be incurred over various periods with respect to a hypothetical investment in our common stock. The following example illustrates the expenses that common stockholders would pay on a $1,000 investment in common stock, assuming (1) the sales load of 3.12% and estimated offering expenses of $835,000, (2) total annual expenses (excluding tax liabilities) of 2.36% of net assets attributable to Common Shares, (3) a 5% annual return, and (4) all distributions reinvested at NAV:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **1 Year** | **3 Years** | **5 Years** | **10 Years** |
|  Total Expenses Paid by Common Stockholders | $57 | $105 | $156 | $294 |

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#### The Example should not be considered a representation of future expenses. Actual expenses may be greater or less than those shown above.

#### capitalization
The table below shows the outstanding capitalization of the Company as of November 30, 2025, and adjusted pro forma after giving effect to anticipated net proceeds of the Offer, assuming that we incur the estimated offering expense.

---

| | | |
|:---|:---|:---|
|  | **Actual <br>(unaudited)** | **As Adjusted <br>(unaudited)** |
|  Credit facility borrowings | $72100000 | $72100000 |
|  Senior notes | $137909718 | $137909718 |
|  Mandatorily redeemable preferred stock at liquidation value | $69905300 | $69905300 |
|  Capital stock, $0.001 par value per share | $21125 | $28173 |
|  Additional paid-in capital | $876858458 | $1173804029 |
|  Total distributable accumulated earnings | $106362446 | $106362446 |
|  **Net assets applicable to common stockholders** | $983242029 | $1280194648 |
|  Common shares outstanding | 21124673 | 28244354 |
|  **Net Asset Value per common share outstanding** | $**46.54** | $**45.33** |

---

#### Use of Proceeds
We estimate the net proceeds of the Offer to be approximately $296,952,619. This figure is based on the estimated Subscription Price of $43.64 and assumes all new Common Shares offered are sold and that the expenses related to the Offer estimated at approximately $835,000 are paid after deduction of the underwriting discounts and commissions.

We intend to invest the proceeds of this offering in accordance with our investment objective and policies and for general corporate purposes. We anticipate that the proceeds will be invested promptly as investment opportunities are identified, depending on market conditions, and it is anticipated to take not more than approximately three months from the completion of this offering. Pending investment, it is anticipated that the proceeds will be invested in short-term or long-term securities issued by the U.S. Government and its agencies or instrumentalities or in high-quality, short-term money market instruments.

#### DESCRIPTION OF THE OFFER

#### Purpose of the Offer
The Board, based on the recommendations of and presentations by the Investment Adviser, and others, has determined that it is in the best interests of the Company and its common stockholders to conduct the Offer and thereby to increase the assets of the Company available for investment. In making this determination, the Board considered a number of factors, including potential benefits and costs. In particular, the Board considered the Investment Adviser's belief that the Offer would enable the Company to seek to take advantage of existing and future investment opportunities that may be or may become available, consistent with the Company's investment objective to seek high total return with an emphasis on current distributions paid to stockholders.

The Offer seeks to provide an opportunity to existing common stockholders to purchase Common Shares at a discount to market price (subject to the sales load described in this Prospectus Supplement). The Board considered that the distribution to common stockholders of transferable Rights, which may themselves have intrinsic value, also will afford non-participating common stockholders of record on the Record Date, the potential of receiving cash payment upon the sale of the Rights, receipt of which may be viewed as partial compensation for any dilution of their interests that may occur as a result of the Offer. There can be no assurance that a market for the Rights will develop or, if such a market does develop, what the price of the Rights will be.

In making its determination that the Offer is in the best interests of the Company and its common stockholders, the Board also considered various additional factors, including: (i) the size, pricing and structure of the Offer, including the transferability of the Rights and the ability of the Dealer Manager to purchase and exercise Rights; (ii) that the Offer, if it is well-subscribed, could increase the liquidity of the Common Shares on the NYSE, where the Common Shares are traded; (iii) the opportunity the Offer represents for current common stockholders to buy Common Shares at a discount to NAV or market price, or, in many cases, both; (iv) the costs of the Offer, including dilution of common stockholders' interests through the Offer and fees paid to the Dealer Manager; (v) the possible negative effect of the Offer on the market price of Common Shares; and (vi) that the Offer will increase the Company's asset base and thus allow it to spread fixed expenses over a larger base of assets and that continued growth in the Company's asset base may lead to reductions in the Company's expense ratio. The Board noted that the Investment Adviser has an inherent conflict of interest in recommending the Offer because its fees are based on a percentage of the Company's Managed Assets (the greater the Managed Assets of the Company, the greater the compensation paid to the Investment Adviser).

There can be no assurance that the Offer or the investment of the proceeds of the Offer will be successful. The completion of the Offer may result in an immediate dilution of the NAV per Common Share for all existing common stockholders, including those who fully exercise their Rights (as defined below). For a discussion of the potential impact of the Offer on current common stockholders, such as dilution, see "Risks Relating to the Offer" in this Prospectus Supplement.

#### Important Terms of the Offer
The Company is issuing transferable rights ("Rights") to its common stockholders of record ("Record Date Stockholders") as of the close of business on May 20, 2026 (the "Record Date"), entitling the holders of those Rights to subscribe for up to an aggregate of 7,043,198 of the Company's Common Shares (the "Shares") (the "Offer"). Record Date Stockholders will receive one Right for each outstanding whole Common Share of the Company held on the Record Date. The Rights entitle their holders to purchase one Common Share for every three Rights held (1-for-3). Fractional Common Shares will not be issued upon the exercise of Rights; accordingly, Rights may be exercised only in integer multiples of three with fractional shares rounded down to the nearest whole share, except that any Record Date Stockholder who owns fewer than three Common Shares as of the Record Date may subscribe, at the Subscription Price (as defined on the next page), for one full Common Share. Assuming the exercise of all Rights, the Offer will result in an approximately 33 1/3% increase in the Company's Common Shares outstanding.

Record Date Stockholders who exercise all the Rights issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) are entitled to subscribe for additional Common Shares at the same Subscription Price pursuant to the over-subscription privilege, subject to certain limitations and subject to allotment. Investors who are not Record Date Stockholders, but who otherwise acquire Rights to purchase Shares pursuant to the Offer, are not entitled to subscribe for any Shares pursuant

to the over-subscription privilege. See "— Over-Subscription Privilege" below. The distribution to Record Date Stockholders of transferable Rights may afford non-participating Record Date Stockholders the opportunity to sell their Rights for some cash value, receipt of which may be viewed as partial compensation for any economic dilution of their interests resulting from the Offer.

The subscription period commences on May 20, 2026, and ends at 5:00 p.m. Eastern time on June 17, 2026, unless otherwise extended (the "Expiration Date").

The Company has declared a regular May monthly distribution to common stockholders in an amount of $0.475 per share payable on May 29, 2026, with a record date of May 22, 2026, and a regular June monthly distribution to common stockholders in an amount of $0.475 per share payable on June 30, 2026, with a record date of June 3, 2026. Common stockholders should note that the monthly distribution payable on May 29, 2026, to common stockholders of record as of May 22, 2026, and the monthly distribution payable on June 30, 2026, to common stockholders of record as of June 3, 2026, will not be payable with respect to Common Shares that are issued pursuant to the Offer after the record dates of such distributions.

For purposes of determining the maximum number of Common Shares a Rights holder may acquire pursuant to the Offer, broker-dealers, trust companies, banks or others whose Common Shares are held of record by Cede & Co., the nominee for the DTC, or by any other depository or nominee, will be deemed to be the holders of the Rights that are held by Cede & Co. or such other depository or nominee on their behalf.

The Rights are transferable and, subject to notice of issuance, will be admitted for trading on the NYSE under the symbol "TYG RT" during the course of the Offer. Trading in the Rights on the NYSE may be conducted until the close of trading on June 16, 2026, the last business day prior to the Expiration Date. See "Sale and Transferability of Rights." It is expected that the Shares, once issued, will be listed on the NYSE under the symbol "TYG." The Rights will be evidenced by subscription certificates which will be mailed to Record Date Stockholders, except as discussed under "— Requirements for Foreign Stockholders."

Rights may be exercised by filling in and signing the subscription certificate and mailing it in the envelope provided, and delivering the completed and signed subscription certificate to Computershare Trust Company, N.A., the subscription agent for the Offer, together with payment at the estimated Subscription Price for the Common Shares subscribed for. For a discussion of the method by which Rights may be exercised and Common Shares may be paid for, see "— Method for Exercising Rights" and "— Payment for Common Shares."

The Company has retained UBS Securities LLC (the "Dealer Manager") to provide the Company with financial structuring and soliciting services relating to the Offer, including advice with respect to the structure, timing and terms of the Offer. In determining the structure of the Offer, the Board considered, among other things, using a fixed-pricing versus a variable-pricing mechanism, the benefits and drawbacks of conducting a non-transferable versus a transferable rights offering, the anticipated effect on the Company and its existing Common Stockholders if the Offer is not fully subscribed, the anticipated dilutive effects on the Company and its existing Common Stockholders of the Offer and the experience of the Dealer Manager in conducting rights offerings. The Board also considered that the Investment Adviser would benefit from the Offer because the management fee paid to the Investment Adviser is based on the Company's Managed Assets, which would increase as a result of the Offer.

#### Important Dates to Remember
Record Date: Close of Business on May 20, 2026

Subscription Period: May 20, 2026 — June 17, 2026\*

Final Date Rights Will Trade: June 16, 2026\*

Expiration Date and Pricing Date: June 17, 2026\*

Subscription Certificate and Payment for Shares Due+: June 17, 2026\*

Notice of Guaranteed Delivery and Payment for Shares Due+: June 17, 2026\*

Subscription Certificates Pursuant to Guarantees of Delivery Due+: June 18, 2026\*

Confirmation Mailed to Participants: June 25, 2026\*

Final Payment for Shares Due: July 10, 2026†\*

Issuance Date: June 25, 2026\*†

____________

\*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unless the Offer is extended.

+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A holder exercising Rights must deliver by 5:00 p.m. Eastern Time on June 17, 2026 (unless the Offer is extended) either (a) a Subscription Certificate and payment for the Common Shares subscribed for or (b) a notice of guaranteed delivery and payment for the Common Shares subscribed for.

†&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Any additional amount due (in the event the Subscription Price exceeds the estimated Subscription Price). See "Payment for Common Shares."

#### Subscription Price
The Subscription Price will be determined based on a Formula Price equal to 92.5% of the average of the last reported sale price of a Common Share on the NYSE on the Expiration Date and each of the four (4) preceding trading days. If, however, the Formula Price is less than 90% of the average of the NAV per Common Share at the close of trading on the NYSE on the Expiration Date, as such date may be extended from time to time, and each of the four (4) preceding trading days, then the Subscription Price will be 90% of the average of the Company's NAV per Common Share at the close of trading on the NYSE on the Expiration Date, as such date may be extended from time to time, and each of the four (4) preceding trading days. In each case, NAV will be calculated as of the close of trading on the NYSE on the applicable day.

Because the Expiration Date of the subscription period will be June 17, 2026 (unless the subscription period is extended), Rights holders will not know the Subscription Price at the time of exercise and will be required initially to pay for both the Shares subscribed for pursuant to the primary subscription and, if eligible, any additional Common Shares subscribed for pursuant to the over-subscription privilege at the estimated Subscription Price of $43.64 per Common Share. See "Payment for Common Shares." A Rights holder will have no right to rescind his subscription after the Subscription Agent has received a completed subscription certificate together with payment for the Common Shares subscribed for. The Company does not have the right to withdraw the Rights or to cancel the Offer after the Rights have been distributed.

The NAV per Common Shares at the close of business on May 13, 2026 was $48.68, and the last reported sale price of a Common Share on the NYSE on that day was $46.08, representing a discount to NAV of (5.3)%.

#### Over-Subscription Privilege
Record Date Stockholders who exercise all the Rights issued to them (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) are entitled to subscribe for additional Common Shares that were not subscribed for by other holders of Rights at the same Subscription Price pursuant to the over-subscription privilege, subject to certain limitations and subject to allotment. If sufficient remaining Common Shares are available following the primary subscription, all Record Date Stockholders' over-subscription requests will be honored in full. Investors who are not Record Date Stockholders, but who otherwise acquire Rights pursuant to the Offer, are not entitled to subscribe for any Common Shares pursuant to the over-subscription privilege. If sufficient Common Shares are not available to honor all over-subscription requests, unsubscribed Common Shares will be allocated pro rata among those Record Date Stockholders who over-subscribe based on the number of Common Shares they owned on the Record Date. The allocation process may involve a series of allocations in order to ensure that the total number of Common Shares available for over-subscriptions is distributed on a pro rata basis.

Record Date Stockholders who are fully exercising their Rights during the subscription period should indicate, on the subscription certificate that they submit with respect to the exercise of the Rights issued to them, how many Common Shares they desire to acquire pursuant to the over-subscription privilege.

Banks, broker-dealers, trustees and other nominee holders of Rights will be required to certify to the Subscription Agent, before any over-subscription privilege may be exercised with respect to any particular beneficial owner, as to the aggregate number of Rights exercised during the subscription period and the number of Common

Shares subscribed for pursuant to the over-subscription privilege by such beneficial owner, and that such beneficial owner's primary subscription was exercised in full. Nominee holder over-subscription forms will be distributed to banks, brokers, trustees and other nominee holders of Rights with the subscription certificates.

The Company will not offer or sell any Common Shares that are not subscribed for during the subscription period or pursuant to the over-subscription privilege.

The Company has been advised that one or more of the officers or employees of the Investment Adviser may exercise all of the Rights initially issued to them and may request additional Common Shares pursuant to the over-subscription privilege. An exercise of the over-subscription privilege by such persons will increase their proportionate voting power and share of the Company's assets.

#### Sale and Transferability of Rights
The Rights will be, subject to notice of issuance, admitted for trading on the NYSE under the symbol "TYG RT" during the course of the Offer. Trading in the Rights on the NYSE may be conducted until the close of trading on June 16, 2026 (the last business day prior to the Expiration Date). The Company will use its best efforts to ensure that an adequate trading market for the Rights will exist, although there can be no assurance that a market for the Rights will develop. Assuming a market exists for the Rights, the Rights may be purchased and sold through usual brokerage channels or sold through the Subscription Agent.

Trading of the Rights on the NYSE will be conducted on a when-issued basis until and including the date on which the subscription certificates evidencing Rights are mailed to Record Date Stockholders and thereafter will be conducted on a regular-way basis until and including the last NYSE trading day prior to the completion of the Subscription Period. The Common Shares are expected to begin trading ex-Rights one Business Day prior to the Record Date.

Rights that are sold will not confer any right to acquire any Common Shares pursuant to the over-subscription privilege, if any, and any Record Date Stockholder who sells any Rights (other than those Rights that cannot be exercised because they represent the right to acquire less than one Common Share) will not be eligible to participate in the over-subscription privilege, if any.

*Sales through the Subscription Agent and the Dealer Manager.&nbsp;&nbsp;&nbsp;&nbsp;*Record Date Stockholders who do not wish to exercise any or all of the Rights issued to them pursuant to the Offer may instruct the Subscription Agent to try to sell any unexercised Rights. Although the Rights are expected to trade on the NYSE through the last business day prior to the Expiration Date, subscription certificates representing the Rights to be sold by the Subscription Agent must be received by the Subscription Agent on or before 5:00 p.m. Eastern time on June 10, 2026 (or, if the subscription period is extended, by 5:00 p.m. Eastern time on the fifth business day prior to the extended Expiration Date).

Upon the timely receipt by the Subscription Agent of appropriate instructions to sell Rights, the Subscription Agent will ask the Dealer Manager if it will purchase the Rights. The sale price of any Rights sold to the Dealer Manager will be based upon the then-current market price for the Rights. The proceeds from each of such sales to the Dealer Manager will be remitted to the Subscription Agent, which will hold such proceeds in an account segregated from the Subscription Agent's own funds pending distribution to each selling Record Date Stockholder. It is expected that following each such sale of Rights to the Dealer Manager, the proceeds from each such sale will be received by the Subscription Agent within two business days of the sale and that the proceeds will then be remitted by the Subscription Agent to the selling Record Date Stockholder within five business days following the Expiration Date.

If the Dealer Manager declines to purchase the Rights of a Record Date Stockholder that have been duly submitted to the Subscription Agent for sale, the Subscription Agent will attempt to sell such Rights in the open market. If the Rights can be sold in such manner, all of such sales will be deemed to have been effected at the weighted-average price of all Rights sold by the Subscription Agent in such open market transactions throughout the subscription period. The proceeds from such sales will be held by the Subscription Agent in an account segregated from the Subscription Agent's own funds pending distribution to the selling Record Date Stockholders. It is expected that the proceeds of such open market sales will be remitted by the Subscription Agent to the selling Record Date Stockholders within five business days following the Expiration Date.

The Subscription Agent will also attempt to sell (either to the Dealer Manager or in open market transactions) all Rights that remain unclaimed as a result of subscription certificates being returned by the postal authorities to the Subscription Agent as undeliverable as of the fifth business day prior to the Expiration Date. The Subscription Agent will hold the proceeds from those sales in an account segregated from the Subscription Agent's own funds for the benefit of such non-claiming Record Date Stockholders until such proceeds are either claimed or revert to their state of residence.

There can be no assurance that the Subscription Agent will be able to complete the sale of any Rights, and neither the Company, the Dealer Manager nor the Subscription Agent have guaranteed any minimum sale price for the Rights. If a Record Date Stockholder does not utilize the services of the Subscription Agent and chooses to use another broker-dealer or other financial institution to sell Rights issued to that Record Date Stockholder pursuant to the Offer, then the other broker-dealer or financial institution may charge a fee to sell the Rights.

*Other Transfers.&nbsp;&nbsp;&nbsp;&nbsp;*The Rights evidenced by a subscription certificate may be transferred in whole by endorsing the subscription certificate for transfer in accordance with the instructions accompanying the subscription certificate. A portion of the Rights evidenced by a single subscription certificate (but not fractional Rights) may be transferred by delivering to the Subscription Agent a subscription certificate properly endorsed for transfer, with instructions to register such portion of the Rights evidenced thereby in the name of the transferee and to issue a new subscription certificate to the transferee evidencing the transferred Rights. If this occurs, a new subscription certificate evidencing the balance of the Rights, if any, will be issued to the Record Date Stockholder or, if the Record Date Stockholder so instructs, to an additional transferee. The signature on the subscription certificate must correspond with the name as written upon the face of the subscription certificate in every particular, without alteration or enlargement or any other change. A signature guarantee will be required in connection with a transfer of Rights. If required, a signature guarantee must be provided by an "eligible guarantor institution" (as defined in Rule 17Ad-15 of the Securities Exchange Act of 1934, as amended).

Record Date Stockholders wishing to transfer all or a portion of their Rights (but not fractional Rights) should allow at least ten business days prior to the Expiration Date for: (i) the transfer instructions to be received and processed by the Subscription Agent; (ii) a new subscription certificate to be issued and transmitted to the transferee or transferees with respect to transferred Rights and to the transferor with respect to retained Rights, if any; and (iii) the Rights evidenced by the new subscription certificate to be exercised or sold by the recipients of the subscription certificate. Neither the Company nor the Subscription Agent nor the Dealer Manager shall have any liability to a transferee or transferor of Rights if subscription certificates are not received in time for exercise or sale prior to the Expiration Date.

Except for the fees charged by EQ Fund Solutions, LLC, the information agent for the Offer (the "Information Agent"), the Subscription Agent and the Dealer Manager (which are expected to be paid from the proceeds of the Offer by the Company), all commissions, fees and other expenses (including brokerage commissions and transfer taxes) incurred or charged in connection with the purchase, sale or transfer of Rights will be for the account of the transferor of the Rights, and none of these commissions, fees or other expenses will be paid by the Company, the Investment Adviser, the Information Agent, the Subscription Agent or the Dealer Manager. Rights holders who wish to purchase, sell, exercise or transfer Rights through a broker, bank or other party should first inquire about any fees and expenses that the holder will incur in connection with the transactions.

The Company anticipates that the Rights will be eligible for transfer through, and that the exercise of the primary subscription and the over-subscription may be effected through, the facilities of DTC or the Subscription Agent until 5:00 p.m. Eastern time on the Expiration Date. Your broker, bank, trust company or other intermediary may impose a deadline for transferring Rights earlier than 5:00 p.m. Eastern time on the Expiration Date.

#### Method for Exercising Rights
Rights are evidenced by subscription certificates that will be mailed to Record Date Stockholders (except as described under "— Requirements for Foreign Stockholders" below) or, if their Common Shares are held by Cede & Co. or any other depository or nominee on their behalf, to Cede & Co. or such other depository or nominee. Rights may be exercised by completing and signing the subscription certificate and mailing it in the envelope provided, or otherwise delivering the completed and signed subscription certificate to the Subscription Agent, together with payment in full at the estimated Subscription Price for the Common Shares subscribed for by the Expiration Date as described under "— Payment for Common Shares." Rights may also be exercised through the broker of a holder

of Rights, who may charge the holder of Rights a servicing fee in connection with such exercise. Rights may also be exercised by contacting your broker, bank, trust company or other intermediary, which can arrange, on your behalf, to guarantee delivery of a properly completed and executed subscription certificate pursuant to a notice of guaranteed delivery by the close of business on the first business day after the Expiration Date. A fee may be charged for this service. Completed subscription certificates and payments must be received by the Subscription Agent by 5:00 p.m. Eastern time on the Expiration Date (unless delivery of subscription certificate is effected by means of a notice of guaranteed delivery as described below under "— Payment for Common Shares") at the offices of the Subscription Agent at one of the addresses set forth below under "— Subscription Agent." Your broker, bank, trust company or other intermediary may impose a deadline for exercising Rights earlier than 5:00 p.m. Eastern time, on the Expiration Date. Fractional Common Shares will not be issued upon exercise of Rights. Fractional shares will be rounded down to the nearest whole number, except that stockholders who own less than three Common Shares are entitled to subscribe for one Common Share.

*Shareholders who are Record Owners.&nbsp;&nbsp;&nbsp;&nbsp;*Shareholders who are record owners of Common Shares can choose between either option set forth under "— Payment for Common Shares." If time is of the essence, option (2) will permit delivery of the subscription certificate after the Expiration Date.

*Investors whose Common Shares are Held by a Nominee.&nbsp;&nbsp;&nbsp;&nbsp;*Investors whose Common Shares are held by a nominee, such as a bank, broker, trustee or other intermediary, must contact that nominee to exercise their Rights. In that case, the nominee will complete the subscription certificate on behalf of the investor and arrange for proper payment by one of the methods set forth below under "— Payment for Common Shares."

*Nominees.&nbsp;&nbsp;&nbsp;&nbsp;*Nominees, such as banks, brokers, trustees or depositories for securities, who hold Common Shares for the account of others should notify the respective beneficial owners of such Common Shares as soon as possible to ascertain those beneficial owners' intentions and to obtain instructions with respect to the Rights. If the beneficial owner so instructs, the nominee should complete the subscription certificate and submit it to the Subscription Agent with the proper payment as described under "— Payment for Common Shares."

Banks, brokers, trustees and other nominee holders of Rights will be required to certify to the Subscription Agent, before any over-subscription privilege may be exercised with respect to any particular beneficial owner who is a Record Date Stockholder, as to the aggregate number of Rights exercised during the subscription period and the number of Common Shares subscribed for pursuant to the over-subscription privilege by the beneficial owner, and that the beneficial owner exercised all the Rights issued to it pursuant to the Offer.

*Requirements for Foreign Stockholders.&nbsp;&nbsp;&nbsp;&nbsp;*Subscription certificates will not be mailed to Record Date Stockholders whose addresses are outside the United States (for these purposes, the United States includes the District of Columbia and the territories and possessions of the United States) ("Foreign Stockholders"). The Subscription Agent will send a letter via regular mail to Foreign Stockholders to notify them of the Offer. The Rights of Foreign Stockholders will be held by the Subscription Agent for their accounts until instructions are received to exercise the Rights. If instructions have not been received by 5:00 p.m. Eastern time on June 10, 2026, five business days prior to the Expiration Date (or, if the subscription period is extended, on or before the fifth business day prior to the extended Expiration Date), the Subscription Agent will ask the Dealer Manager if it will purchase the Rights. If the Dealer Manager declines to purchase the Rights, the Subscription Agent will attempt to sell such Rights in the open market. The net proceeds, if any, from the sale of those Rights will be remitted to those Foreign Stockholders.

#### Expenses of the Offer
The Company will bear the expenses of the Offer and all such expenses will be borne indirectly by the Company's common stockholders, including those who do not exercise their Rights. These expenses include, but are not limited to, the Dealer Manager fee, reimbursement of the Dealer Manager's expenses, the expenses of preparing, printing and mailing the prospectus and Rights subscription materials for the Offer (including reimbursement of expenses of the Dealer Manager, Selling Group Members, Soliciting Dealers and other brokers, dealers and financial institutions), SEC registration fees and the fees assessed by service providers (including the cost of the Company's counsel and independent registered public accounting firm) in connection with the Offer.

#### Subscription Agent
Computershare, Inc., together with Computershare Trust Company, N.A., is the Subscription Agent for the Offer. The Subscription Agent will receive for its administrative, processing, invoicing and other services a project management fee, plus certain per transaction fees and reimbursement for all out-of-pocket expenses related to the Offer. The fees and expenses of the Subscription Agent are included in the fees and expenses of the Offer and therefore will be borne by the Company and indirectly by all common stockholders, including those who do not exercise their Rights. Questions regarding the subscription certificates should be directed by mail to the Information Agent, EQ Fund Solutions, LLC, 28 Liberty Street, 53<sup>rd</sup> Floor, New York, New York 10005, or by phone at (800) 814-0439. Shareholders may also subscribe for the Offer by contacting their broker dealer, trust company, bank or other nominee.

Completed subscription certificates must be sent together with proper payment of the estimated Subscription Price for all Common Shares subscribed for in the primary subscription and the over-subscription privilege (for Record Date Stockholders) to the Subscription Agent by one of the methods described below. Alternatively, Rights holders may arrange for their financial intermediaries to submit notices of guaranteed delivery through DTC to be received by the Subscription Agent along with proper payment of the estimated Subscription Price for all Common Shares subscribed for in the primary subscription and the over-subscription privilege (for Record Date Stockholders) prior to 5:00 p.m. Eastern time, on the Expiration Date. The Company will accept only properly completed and executed subscription certificates actually received at any of the addresses listed below, prior to 5:00 p.m. Eastern time, on the Expiration Date, or by the close of business on the first business day after the Expiration Date following timely receipt of a notice of guaranteed delivery. See "Payment for Common Shares."

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| | |
|:---|:---|
|  **Subscription Certificate Delivery Method** | **Address/Number** |
|  Notice of Guaranteed Delivery: | Contact your broker-dealer, trust company, bank or other nominee to notify the Company of your intent to exercise the Rights. <br> Send via email to: canoticeofguarantee@computershare.com |
|  First Class Mail Only <br> (No Express Mail or Overnight Courier): | Computershare Trust Company, N.A. <br> c/o Corporate Actions Voluntary Offer/Tortoise Energy Infrastructure Corporation <br> P.O. Box 43011 <br> Providence, RI 02940-3011 |
|  Express Mail or Overnight Courier: | Computershare Trust Company, N.A.<br> c/o Corporate Actions Voluntary Offer/Tortoise Energy Infrastructure Corporation <br> 150 Royall Street, Suite V <br> Canton, MA 02021 |

---

The Company will honor only subscription certificates received by the Subscription Agent prior to 5:00 p.m. Eastern time, on the Expiration Date at one of the addresses listed above. Delivery to an address other than those listed above will not constitute good delivery.

#### Information Agent
The Information Agent for the Offer is EQ Fund Solutions, LLC. If you have questions or need further information about the Offer, please write the Information Agent at EQ Fund Solutions, LLC, 28 Liberty Street, 53<sup>rd</sup> Floor, New York, New York 10005 or call (800) 814-0439. Any questions or requests for assistance concerning the method of subscribing for Common Shares or additional copies of this Prospectus Supplement and the accompanying Prospectus or subscription certificates should be directed to the Information Agent. Common stockholders may also contact their brokers or nominees for information with respect to the Offer.

The Information Agent will receive a fee for its services, plus reimbursement for all out-of-pocket expenses related to the Offer. The fees and expenses of the Information Agent are included in the fees and expenses of the Offer and therefore will be borne by the Company and indirectly by all of its common stockholders, including those who do not exercise their Rights.

#### Expiration of the Offer
The Offer will expire at 5:00 p.m. Eastern time on June 17, 2026 unless the Company extends the subscription period. Rights will expire on the Expiration Date and may not be exercised after that date. If the Company extends the subscription period, the Company will make an announcement as promptly as practicable. This announcement will be issued no later than 9:00 a.m. Eastern time on the next business day following the previously scheduled Expiration Date. Without limiting the manner in which the Company may choose to make this announcement, the Company will not, unless otherwise required by law, have any obligation to publish, advertise or otherwise communicate this announcement other than by making a release to the Dow Jones News Service or any other means of public announcement as the Company may deem proper.

#### Payment for Common Shares
Rights holders who wish to acquire Common Shares pursuant to the Offer may choose between the following methods of payment:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)&nbsp;&nbsp;&nbsp;&nbsp;A Rights holder can send the properly completed and executed subscription certificate together with payment for the Common Shares subscribed for during the subscription period and, if eligible, for any additional Common Shares subscribed for pursuant to the over-subscription privilege to the Subscription Agent based upon an estimated Subscription Price of $43.64 per Common Share. A subscription will be accepted when payment, together with the executed subscription certificate, is received by the Subscription Agent at one of the addresses set forth under "— Subscription Agent," the payment and the properly completed and executed subscription certificate must be received by the Subscription Agent by 5:00 p.m. Eastern time on the Expiration Date. The Subscription Agent will deposit all checks received by it for the purchase of Common Shares into a segregated account of the Company pending proration and distribution of Common Shares. A payment pursuant to this method must be in U.S. dollars by check drawn on a bank located in the United States, must be payable to "Computershare Trust Company, N.A." and must accompany a properly completed and executed subscription certificate for such subscription to be accepted.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)&nbsp;&nbsp;&nbsp;&nbsp;Alternatively, a subscription will be accepted by the Subscription Agent if, by 5:00 p.m. Eastern time on the Expiration Date, the Subscription Agent has received a notice of guaranteed delivery by mail or email from a bank, a trust company or an NYSE member guaranteeing delivery of a properly completed and executed subscription certificate. In order for the notice of guarantee to be valid, full payment for the Common Shares subscribed for during the subscription period and, if eligible, for any additional Common Shares subscribed for pursuant to the over-subscription privilege, based upon an estimated Subscription Price of $43.64 per Common Share, must be received by the Subscription Agent with the notice of guaranteed delivery. The Subscription Agent will not honor a notice of guaranteed delivery unless a properly completed and executed subscription certificate is received by the Subscription Agent by the close of business on the first business day after the Expiration Date.

On the confirmation date, which will be eight business days following the Expiration Date, a confirmation will be sent by the Subscription Agent to each Rights holder exercising its Rights (or, if a Rights holder's Common Shares are held by DTC or any other depository or nominee, to DTC and/or that other depository or nominee) showing (i) the number of Common Shares acquired during the subscription period, (ii) the number of Common Shares, if any, acquired pursuant to the over-subscription privilege, (iii) the per Common Share and total purchase price for the Common Shares and (iv) any additional amount payable to the Company by the Rights holder or any excess to be refunded by the Company to the Rights holder, in each case based on the Subscription Price as determined on the Expiration Date. Any additional payment required from a Rights holder must be received by the Subscription Agent within ten business days after the confirmation date (which confirmation date is June 25, 2026, unless the subscription period is extended). Any excess payment to be refunded by the Company to a Rights holder will be mailed by the Subscription Agent to such Rights holder as promptly as practicable. All payments by a Rights holder must be in U.S. dollars by personal check drawn on a bank located in the United States and payable to "Computershare Trust Company, N.A."

Whichever of the two methods described above is used, issuance and delivery of the Common Shares subscribed for are contingent upon actual payment for such Common Shares. No certificates will be issued or delivered with respect to Common Shares issued and sold in the Offer.

Rights holders who have exercised their Rights will have no right to rescind their subscription after receipt of the completed subscription certificate together with payment for the Common Shares subscribed for by the Subscription Agent.

If a Rights holder who acquires Common Shares during the subscription period or pursuant to the over-subscription privilege (for Record Date Stockholders) does not make payment of any amounts due by the Expiration Date, the Company reserves the right to take any or all of the following actions through all appropriate means: (i) find other Record Date Stockholders for the subscribed and unpaid-for Common Shares; (ii) apply any payment actually received by the Company toward the purchase of the greatest whole number of Common Shares that could be acquired by the Rights holder upon exercise of such Rights acquired during the subscription period or pursuant to the over-subscription privilege; and/or (iii) exercise any and all other rights or remedies to which the Company may be entitled, including, without limitation, the right to set off against payments actually received by it with respect to such subscribed Common Shares.

The method of delivery of completed subscription certificates and payment of the Subscription Price to the Subscription Agent will be at the election and risk of exercising Rights holders, but if sent by mail it is recommended that such forms and payments be sent by registered mail, properly insured, with return receipt requested, and that a sufficient number of days be allowed to ensure delivery to the Subscription Agent and clearance of payment by 5:00 p.m. Eastern time on the Expiration Date. Because uncertified personal checks may take at least five business days to clear, exercising Rights holders are strongly urged to pay, or arrange for payment, by means of certified or cashier's check with the Right holder's name and Subscription Agent account number identified on the check.

All questions concerning the timeliness, validity, form and eligibility of any exercise of Rights will be determined by the Company, which determinations will be final and binding. The Company, in its sole discretion, may waive any defect or irregularity, or permit a defect or irregularity to be corrected within such time as it may determine, or reject the purported exercise of any Right. Subscriptions will not be deemed to have been received or accepted until substantially all irregularities have been waived or cured within such time as the Company determines in its sole discretion. The Company will not be under any duty to give notification of any defect or irregularity in connection with the submission of subscription certificates or incur any liability for failure to give such notification.

#### Delivery of Shares
Participants in the Company's dividend reinvestment plan (the "Plan") will have any Common Shares acquired pursuant to the Offer credited to their dividend reinvestment accounts in the Plan. Common stockholders whose Common Shares are held of record by DTC or by any other depository or nominee on their behalf or their broker-dealers' behalf will have any Common Shares acquired during the subscription period credited to the account of DTC or other depository or nominee. No certificates will be issued or delivered with respect to Common Shares issued and sold in the Offer.

#### MARKET AND NET ASSET VALUE INFORMATION
The Prospectus sets forth for each fiscal quarter for the last two fiscal years and the current fiscal year, the high and low closing market prices for our Common Shares on the NYSE, the NAV per share and the premium or discount to NAV per share at which our Common Shares were trading. See "Market and Net Asset Value Information" in the Prospectus. See also "Determination of Net Asset Value" for information as to the determination of our NAV.

The last reported NAV, the market price and percentage discount to NAV per Common Share on May 13, 2026 were $48.68, $46.08 and (5.3)% respectively. As of May 13, 2026, we had approximately 21,100,000 Common Shares outstanding and total assets of approximately $1.4 billion.

#### RISKS RELATING TO THE OFFER

#### Dilution Risk
As a result of this Offer, it is anticipated that even if you fully exercise your Rights, you should expect to incur immediate economic dilution and, if you do not exercise all of your Rights, you will incur voting dilution. Further, both the sales load and the expenses associated with the Offer paid by the Company will immediately reduce the NAV of each common stockholder's Common Shares. To the extent that the number of Common Shares outstanding after the Offer will have increased proportionately more than the increase in the size of the Company's net assets, you will, at the completion of the Offer, experience immediate dilution of NAV. The percentage increase in Common Shares outstanding that will occur if all the Rights are exercised is 33 1/3%. In addition, if the Subscription Price for the Offer is less than the Company's NAV per Common Share as of the Expiration Date, you would experience additional immediate dilution of NAV as a result of the Offer. If the Subscription Price is substantially less than the current NAV per Common Share at the expiration of the Offer, such dilution could be substantial. It is anticipated that the existing common stockholders will experience immediate dilution even if they fully exercise their Rights. In addition, whether or not you exercise your Rights, you will experience a dilution of NAV of the Common Shares because you will indirectly bear the expenses of this Offer, which include, among other items, SEC registration fees, printing expenses and the fees assessed by service providers (including the cost of the Company's counsel and independent registered public accounting firm). This dilution of NAV will disproportionately affect common stockholders who do not exercise their Rights. The Company cannot state precisely the amount of any decrease because it is not known at this time how many Common Shares will be subscribed for or what the NAV or market price of the Company's Common Shares will be on the Expiration Date or what the Subscription Price will be. For example, based on the Company's NAV and the market price of Common Shares on May 13, 2026, and on each of the four (4) preceding trading days, the Subscription Price would be less than NAV and there would be dilution. Assuming full exercise of the Rights being offered at the estimated Subscription Price and assuming that the Expiration Date were May 13, 2026, it is estimated that the per Common Share dilution resulting from the Offer would be $1.63 or (3.3)%.

In addition to the economic dilution described above, if you do not exercise all of your Rights, you will incur voting dilution as a result of this Offer. This voting dilution will occur because you will own a smaller proportionate interest in the Company after the Offer than you owned prior to the Offer.

The fact that the Rights are transferable may reduce the effects of dilution as a result of the Offer. Rights holders can transfer or sell their Rights. The cash received from the sale of Rights may be viewed as partial compensation for any possible dilution. There can be no assurances, however, that a market for the Rights will develop or that the Rights will have any value in that market.

#### Increase in Share Price Volatility; Decrease in Share Price
The Offer may result in an increase in trading of the Common Shares, which may increase volatility in the market price of the Common Shares. The Offer may result in an increase in the number of common stockholders wishing to sell their Common Shares, which would exert downward price pressure on the price of Common Shares.

#### Under-Subscription
It is possible that the Offer will not be fully subscribed. Under-subscription of the Offer could have an impact on the net proceeds of the Offer and whether the Company achieves any benefits.

#### Risks of Acquiring Rights to Purchase Common Shares
Shares of closed-end funds such as the Company frequently trade at a discount to NAV. Since inception, the Company's Common Shares have frequently traded at a discount in relation to NAV. See "Description of Common Shares." If the Formula Price is less than 90% of the average NAV on the Expiration Date and each of the four (4) preceding trading days, then the Subscription Price will likely be greater than the average market price of a

Common Share over the same period. In addition, the Formula Price, even if above 90% of the average NAV on the Expiration Date and each of the four (4) preceding trading days, may still be above the average market price of a Common Share over the same period. If either event occurs, the Rights will have no value, and a person who exercises Rights will experience an immediate loss of value.

There can be no assurance that a market for the Rights will develop or, if such a market develops, what the price of the Rights will be. Changes in market conditions may result in the Common Shares purchasable upon exercise of the Rights being less attractive to investors at the Expiration Date. This may reduce or eliminate the value of the Rights. Investors who receive or acquire Rights may find that there is no market to sell Rights that they do not wish to exercise.

#### PLAN OF DISTRIBUTION

#### Distribution Arrangements
UBS Securities LLC will act as Dealer Manager for this Offer. Under the terms and subject to the conditions contained in the Dealer Manager Agreement among the Dealer Manager, the Company and the Investment Adviser, the Dealer Manager will provide financial structuring and solicitation services in connection with the Offer and will solicit the exercise of Rights and participation in the over-subscription privilege. The Offer is not contingent upon any number of Rights being exercised. The Dealer Manager will also be responsible for forming and managing a group of selling broker-dealers (each a "Selling Group Member" and collectively the "Selling Group Members"), whereby each Selling Group Member will enter into a Selling Group Agreement with the Dealer Manager to solicit the exercise of Rights and to sell Common Shares purchased by the Selling Group Member from the Dealer Manager. In addition, the Dealer Manager will enter into a Soliciting Dealer Agreement with other soliciting broker-dealers (each a "Soliciting Dealer" and collectively the "Soliciting Dealers") to solicit the exercise of Rights. See "Compensation to Dealer Manager" for a discussion of fees and other compensation to be paid to the Dealer Manager, Selling Group Members and Soliciting Dealers in connection with the Offer.

The Company and the Investment Adviser have each agreed to indemnify the Dealer Manager for losses arising out of certain liabilities, including liabilities under the Securities Act. The Dealer Manager Agreement also provides that the Dealer Manager will not be subject to any liability to the Company in rendering the services contemplated by the Dealer Manager Agreement except for any act of willful misfeasance, bad faith or gross negligence of the Dealer Manager or reckless disregard by the Dealer Manager of its obligations and duties under the Dealer Manager Agreement.

Prior to the expiration of the Offer, the Dealer Manager may independently offer for sale Common Shares it has acquired through purchasing and exercising the Rights, at prices that may be different from the market price for such Common Shares or from the price to be received by the Company upon the exercise of Rights. The Dealer Manager is authorized to buy and exercise Rights (for delivery of Common Shares prior to the expiration of the Offer), including unexercised Rights of Record Date Stockholders whose record addresses are outside the United States that are held by the Subscription Agent and for which no instructions are received, and to sell Common Shares to the public or to Selling Group Members at the offering price set by the Dealer Manager from time to time. In addition, the Dealer Manager has the right to buy Rights offered to it by the Subscription Agent from electing Record Date Stockholders, and the Dealer Manager may purchase such Rights as principal or act as agent on behalf of its clients for the resale of such Rights.

In order to seek to facilitate the trading market in the Rights for the benefit of non-exercising common stockholders, and the placement of the Common Shares to new or existing investors pursuant to the exercise of the Rights, the Dealer Manager Agreement provides for special arrangements with the Dealer Manager. Under these arrangements, the Dealer Manager is expected to purchase Rights on the NYSE. The number of Rights, if any, purchased by the Dealer Manager will be determined by the Dealer Manager in its sole discretion. The Dealer Manager is not obligated to purchase Rights or Common Shares as principal for its own account to facilitate the trading market for Rights or for investment purposes. Rather, its purchases are expected to be closely related to interest in acquiring Common Shares generated by the Dealer Manager through its marketing and soliciting activities. The Dealer Manager intends to exercise Rights purchased by it during the Subscription Period but prior to the Expiration Date. The Dealer Manager may exercise those Rights at its option on one or more dates, which are expected to be prior to the Expiration Date. The subscription price for the Common Shares issued through the exercise of Rights by the Dealer Manager prior to the Expiration Date will be the greater of 92.5% of the last reported sale price of a Common Share on the NYSE on the date of exercise or 90% of the Company's NAV per Common Share at the close of trading on the NYSE prior to the date of exercise. The price and timing of these exercises are expected to differ from those described herein for the Rights offering. The Subscription Price will be paid to the Company and the dealer manager fee with respect to such proceeds will be paid by the Company on the applicable settlement date(s) of such exercise(s).

In connection with the exercise of Rights and receipt of Common Shares, the Dealer Manager intends to offer those Common Shares for sale to the public and/or through Selling Group Members it has established. The Dealer Manager may set the price for those Common Shares at any price that it determines, in its sole discretion. The Dealer Manager has advised that the price at which such Common Shares are offered is expected to be at or slightly below

the closing price of the Common Shares on the NYSE on the date the Dealer Manager exercises Rights. No portion of the amount paid to the Dealer Manager or to a Selling Group Member from the sale of Common Shares in this manner will be paid to the Company. If the sales price of the Common Shares is greater than the subscription price paid by the Dealer Manager for such Common Shares plus the costs to purchase Rights for the purpose of acquiring those Common Shares, the Dealer Manager will receive a gain. Alternatively, if the sales price of the Common Shares is less than the Subscription Price for such Common Shares plus the costs to purchase Rights for the purpose of acquiring those Common Shares, the Dealer Manager will incur a loss. The Dealer Manager will pay a concession to Selling Group Members in an amount equal to approximately 2.00% of the aggregate price of the Common Shares sold by the respective Selling Group Member. Neither the Company nor the Investment Adviser has a role in setting the terms, including the sales price, on which the Dealer Manager offers for sale and sells Common Shares it has acquired through purchasing and exercising Rights or the timing of the exercise of Rights or sales of Common Shares by the Dealer Manager. Persons who purchase Common Shares from the Dealer Manager or a Selling Group Member will purchase Common Shares at a price set by the Dealer Manager, which may be more or less than the Subscription Price, based on the Formula Price mechanism through which Common Shares will be sold in the Rights offering, and at a time set by the Dealer Manager, which is expected to be prior to the Expiration Date, and will not have the uncertainty of waiting for the determination of the Subscription Price on the Expiration Date.

The Dealer Manager may purchase Rights as principal or act as agent on behalf of its clients for the resale of such Rights. The Dealer Manager may realize gains (or losses) in connection with the purchase and sale of Rights and the sale of Common Shares, although such transactions are intended by the Dealer Manager to facilitate the trading market in the Rights and the placement of the Common Shares to new or existing investors pursuant to the exercise of the Rights. Any gains (or losses) realized by the Dealer Manager from the purchase and sale of Rights and the sale of Common Shares are independent of and in addition to its fee as Dealer Manager. The Dealer Manager has advised that any such gains (or losses) are expected to be immaterial relative to its fee as Dealer Manager.

Since neither the Dealer Manager nor persons who purchase Common Shares from the Dealer Manager or Selling Group Members were Record Date Stockholders, they would not be able to participate in the over-subscription privilege.

There is no limit on the number of Rights the Dealer Manager can purchase or exercise. Common Shares acquired by the Dealer Manager pursuant to the exercise of Rights acquired by it will reduce the number of Common Shares available pursuant to the over-subscription privilege, perhaps materially, depending on the number of Rights purchased and exercised by the Dealer Manager.

Although the Dealer Manager can seek to facilitate the trading market for Rights as described above, investors can acquire Common Shares at the Subscription Price by acquiring Rights on the NYSE and exercising them in the method described above under "Description of the Offer."

In the ordinary course of their businesses, the Dealer Manager and/or its affiliates may engage in investment banking or financial transactions with the Company, the Investment Adviser and their affiliates. In addition, in the ordinary course of their businesses, the Dealer Manager and/or its affiliates may, from time to time, own securities of the Company or its affiliates.

The principal business address of the Dealer Manager is 11 Madison Avenue, New York, New York 10010.

#### Compensation to Dealer Manager
Pursuant to the Dealer Manager Agreement, the Company has agreed to pay the Dealer Manager a fee for its financial structuring and solicitation services equal to 3.50% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege, up to $150,000,000 and 2.75% of the Subscription Price for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege, over $150,000,000.

The Dealer Manager will reallow to Selling Group Members in the Selling Group to be formed and managed by the Dealer Manager selling fees equal to 2.00% of the Subscription Price for each Common Share issued pursuant to the Offer or the over-subscription privilege as a result of their selling efforts. In addition, the Dealer Manager will reallow to Soliciting Dealers that have executed and delivered a Soliciting Dealer Agreement and have solicited the exercise of Rights, solicitation fees equal to 0.50% of the Subscription Price for each Common Share

issued pursuant to the exercise of Rights as a result of their soliciting efforts, subject to a maximum fee based on the number of Common Shares held by such Soliciting Dealer through DTC on the Record Date. Fees will be paid to the broker-dealer designated on the applicable portion of the subscription certificates or, in the absence of such designation, to the Dealer Manager.

In addition, the Company, has agreed to pay the Dealer Manager an amount up to $175,000 as a partial reimbursement of its expenses incurred in connection with the Offer, including reasonable out-of-pocket fees and expenses, if any, and not to exceed $10,000, incurred by the Dealer Manager, Selling Group Members, Soliciting Dealers and other brokers, dealers and financial institutions in connection with their customary mailing and handling of materials related to the Offer to their customers. The fees described above are one-time fees payable on each date on which the Company issues Common Shares after the Expiration Date with respect to the Dealer Manager, and on or before the tenth business day following the day the Company issues Common Shares after the Expiration Date with respect to a Selling Group Member or Soliciting Dealer. No other fees will be payable by the Company or the Investment Adviser to the Dealer Manager in connection with the Offer.

#### Taxation

#### U.S. Federal Income Tax Considerations
The following is a general summary of U.S. federal income tax considerations with respect to the Offer for Record Date Stockholders and other Rights holders who are U.S. Persons as defined below. The following summary supplements the discussion set forth in the accompanying Prospectus and SAI under the headings "U.S. Federal Income Tax Considerations" and is subject to the qualifications and assumptions set forth therein. Please refer to such discussion for a general description of the U.S. federal income tax considerations with respect to an investment in Common Shares.

The summary below is based upon the Internal Revenue Code of 1986, as amended (the "Code"), Treasury regulations promulgated thereunder ("Treasury regulations"), judicial authorities, published positions of the Internal Revenue Service (the "IRS") and other applicable authorities, all as in effect on the date hereof and all of which are subject to change or differing interpretations possibly with retroactive effect. The discussion does not address all of the tax consequences that may be relevant to a particular Record Date Stockholder or other Rights holder, including those subject to special treatment under U.S. federal income tax laws such as financial institutions, insurance companies, broker-dealers, tax-exempt organizations, foreign persons, or persons holding Rights or Common Shares as part of a straddle or conversion transaction. This discussion is limited to Record Date Stockholders and other Rights holders that hold Common Shares as capital assets. No ruling has been or will be sought from the IRS regarding any matter discussed herein. No assurance can be given that the IRS would not assert, or that a court would not sustain, a position contrary to any of the tax aspects set forth below. Record Date Stockholders and other Rights holders should consult their tax advisors as to the U.S. federal income tax consequences of the Offer that are relevant to their particular situations, as well as the effects of state, local and non-U.S. tax laws.

For purposes of this discussion, a "U.S. Person" means a holder that is, for U.S. federal income tax purposes, any one of the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;an individual who is a citizen or resident of the United States;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a corporation or other entity treated as a corporation that is created or organized in or under the laws of the U.S. or any state thereof or the District of Columbia;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a trust if a court within the U.S. is able to exercise primary supervision over the administration of the trust and one or more U.S. persons have the authority to control all substantial decisions of the trust or the trust has a valid election in effect under applicable Treasury regulations to be treated as a U.S. person; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;an estate, the income of which is includible in gross income for U.S. federal income tax purposes regardless of its source.

If a partnership (or any other entity or arrangement treated as a partnership or other pass-through entity for U.S. federal income tax purposes) holds a Right, the U.S. federal income tax treatment of a partner generally will depend upon the status of the partner and the activities of the partnership. Partners and partnerships holding Rights should consult their tax advisors concerning the U.S. federal income and other tax consequences relevant to their particular situation.

*Issuance of Rights, Basis and Holding Period.&nbsp;&nbsp;&nbsp;&nbsp;*Record Date Stockholders should not recognize taxable income in connection with the receipt of a Right pursuant to the Offer, provided that the distribution does not have the result of causing some Record Date Stockholders to receive an increase in their proportionate interest in the assets or earnings and profits of the Company and other Record Date Stockholders to receive cash or property. The distribution of the Rights in the Offer should not have the effect of causing some Record Date Stockholders to receive an increase in their proportionate interest in the assets or earnings and profits of the Company and other Record Date Stockholders to receive cash or property. Therefore, no income should be recognized by any Record Date Stockholders in connection with the issuance of the Rights pursuant to the Offer.

Except as provided in the following sentence, the basis of a Right received by a Record Date Stockholder will be zero and the basis of the Common Share with respect to which the Right was issued (the "Old Common Share") will remain unchanged. The Record Date Stockholder must allocate a portion of the basis of the Old Common Share

to the Right in proportion to their respective fair market values on the date of distribution if (i) either (a) the fair market value of the Right on the date of distribution is at least 15% of the fair market value of the Old Common Share on that date, or (b) the Record Date Stockholder affirmatively elects (in the manner set out in Treasury regulations) to allocate to the Right a portion of the basis of the Old Common Share and (ii) the Right does not expire unexercised in the hands of the Record Date Stockholder (i.e., the Record Date Stockholder either exercises or sells the Right following its issuance).

The basis of a Right purchased in the market will generally be its purchase price.

The holding period of the Rights received in the Offer will include the Record Date Stockholder's holding period for the Common Shares with respect to which the Rights were issued.

Expiration of the Rights. Record Date Stockholders who receive Rights in the Offer with respect to their Common Shares and who allow such Rights to expire unexercised will not recognize any gain or loss, and no adjustment will be made to the basis of the holder's Common Shares.

If a Right that has been purchased in the market expires unexercised, the holder will recognize a loss equal to the basis of the Right. If the Right was held as a capital asset, loss on the expiration of the Right generally will be a capital loss. The deductibility of capital losses is subject to a number of limitations under the Code.

*Sale of the Rights.&nbsp;&nbsp;&nbsp;&nbsp;*Upon the sale of a Right, the seller will recognize gain or loss equal to the difference between the amount realized on the sale and the seller's basis in the Right. Any gain or loss on the sale of a Right will be capital gain or loss if the Right is held as a capital asset (which in the case of Rights issued to Record Date Stockholders will depend on whether the Old Common Share is held as a capital asset), and will be a long-term capital gain or loss if the holding period of the Right, as determined under the discussion herein, is deemed to exceed one year at the time of the disposition.

*Exercise of the Rights, Basis and Holding Period of Acquired Common Shares.&nbsp;&nbsp;&nbsp;&nbsp;*No gain or loss will be recognized by a Rights holder upon the exercise of a Right, and the basis of any Common Share acquired upon exercise of the Right (the "New Common Share") will equal the sum of the (i) basis, if any, of the Right(s) exercised and (ii) the Subscription Price for the New Common Share. The holding period for the New Common Share acquired through exercise of the Right will begin on the date of exercise of the Right (or, in the case of a Right purchased in the market, potentially the day after the date of exercise).

#### Employee Benefit Plan Considerations
Common stockholders that are employee benefit plans subject to the Employee Retirement Income Security Act of 1974, as amended ("ERISA") (including corporate savings and 401(k) plans, each, an ERISA Plan), Keogh plans of self-employed individuals, Individual Retirement Accounts ("IRAs") and other plans subject to Section 4975 of the Code (with ERISA Plans, each a "Plan" and collectively, the "Plans") should be aware that additional contributions of cash to the Plan (other than rollover contributions or trustee-to-trustee transfers from other Plans) made in order to exercise Rights would be treated as Plan contributions and, when taken together with contributions previously made, may subject a Plan to excise taxes for excess or nondeductible contributions. In the case of Plans qualified under Section 401(a) of the Code and certain other plans, additional cash contributions could cause the maximum contribution limitations of Section 415 of the Code or other qualification rules to be violated. Plans contemplating the receipt of additional cash contributions to exercise Rights should consult with their counsel prior to receiving or using such contributions.

Plans and other tax exempt entities, including governmental plans, should also be aware that if they borrow in order to finance their exercise of Rights, they may become subject to the tax on unrelated business taxable income under Section 511 of the Code. If any portion of an IRA is used as security for a loan to the individual for whose benefit the IRA is established, the portion so used may be treated as distributed to such individual.

Each fiduciary of a Plan should consider, to the extent applicable, the fiduciary standards of ERISA and the Code in the context of the Plan's particular circumstances before making any decision regarding the exercise or other disposition (and in the case of any transferee, the acquisition) of Rights, and any investment in Common Shares as a consequence thereof. Under ERISA and the Code, any person who exercises any discretionary authority or control over the administration of a Plan or the management or disposition of the assets of a Plan, or who renders investment advice for a fee or other compensation to a Plan, is generally considered to be a fiduciary of the Plan.

Accordingly, among other factors, the fiduciary should consider whether the exercise or transfer of Rights and any investment in Common Shares would satisfy the prudence, diversification and conflicts of interests requirements of ERISA, to the extent applicable, and would be consistent with its fiduciary responsibilities, and the documents and instruments governing the Plan.

To the extent the Company, the Investment Adviser or certain of their respective affiliates or other parties involved with the Offer, or in the case of a transfer of Rights, the transferee, might be considered a "party in interest" or a "disqualified person" with respect to a Plan, prohibited transactions may arise under ERISA and/or Section 4975 of the Code in connection with exercises or transfers of Rights unless made pursuant to an available statutory, regulatory, individual or class exemption. In this regard the U.S. Department of Labor has issued prohibited transaction class exemptions that may apply. These exemptions include transactions effected on behalf of a Plan by a "qualified professional asset manager" (prohibited transaction exemption 84-14) or an "in-house asset manager" (prohibited transaction exemption 96-23), transactions involving insurance company general accounts (prohibited transaction exemption 95-60), transactions involving insurance company pooled separate accounts (prohibited transaction exemption 90-1), and transactions involving bank collective investment funds (prohibited transaction exemption 91-38). In addition, Section 408(b)(17) of ERISA and Section 4975(d)(20) of the Code provide relief from the prohibited transaction provisions of ERISA and Section 4975 of the Code for certain transactions, provided that neither the issuer of the securities nor any of its affiliates (directly or indirectly) have or exercise any discretionary authority or control or render any investment advice with respect to the assets of any Plan involved in the transaction and provided further that the Plan receives no less and pays no more than "adequate consideration" (within the meaning of Section 408(b)(17) of ERISA and Section 4975(f)(10) of the Code). There can be no assurance that any of the above exemptions or any other exemption would apply, or that all of the conditions of any such exemptions would be satisfied, with respect to all otherwise prohibited transactions involving Rights or any Common Shares obtained pursuant to any Rights.

Governmental plans, certain church plans and non-U.S. plans may not be subject to the prohibited transaction provisions of ERISA or the Code but may be subject to similar laws ("Similar Laws"). Fiduciaries of any such plans should consult with counsel before exercise or transfer of Rights.

Because of the foregoing, the person making the decision (the "fiduciary") on behalf of a Plan or a governmental, church or foreign plan subject to Similar Law will be deemed to represent on behalf of itself and the Plan or plan subject to Similar Law that the exercise or other disposition (and in the case of any transferee, the acquisition) of the Rights (and the investment in Common Shares pursuant to any exercise) will not result in a non-exempt prohibited transaction under ERISA or Section 4975 of the Code or any applicable Similar Law. In addition, the fiduciary making any decision on behalf of a Plan to exercise, acquire or transfer Rights will be deemed to have represented, warranted and acknowledged that neither the Company nor the Investment Adviser, nor any of their respective affiliates, representatives or agents has provided or will provide advice in a fiduciary capacity with respect to the exercise, acquisition or disposition of Rights by the Plan, unless an exception applies permitting such status.

Due to the complexity of these rules and the penalties for non-compliance, Plans and plans subject to Similar Law should consult with their counsel regarding the consequences of their exercise, acquisition or transfer of Rights under ERISA and the Code or any applicable Similar Law. Each holder of Rights has the exclusive responsibility for ensuring that its acquisition, exercise or other disposition of the Rights, as applicable, does not violate the fiduciary or prohibited transaction rules of ERISA, the Code or any applicable Similar Laws. The provision of this Prospectus Supplement and the accompanying Prospectus and the provision of any Rights to, or the transfer of Common Shares to a Plan pursuant to the exercise of Rights by, a Plan is in no respect a representation or recommendation by the Company, the Investment Adviser or of their respective affiliates, representatives or agents that such an investment is appropriate or advisable for, or meets all relevant legal requirements with respect to investments by, Plans or plans subject to Similar Laws generally or by any particular Plan or plan subject to Similar Law.

#### Legal Matters
Certain legal matters will be passed on by Vedder Price P.C. ("Vedder"), Chicago, Illinois, counsel to the Company and Venable LLP, Baltimore, Maryland, special Maryland counsel, in connection with the offering. Certain legal matters will be passed on by Dechert LLP as special counsel to the Dealer Manager in connection with the Rights offering. Dechert LLP will also rely as to matters of Maryland law on the opinion of Venable LLP.

#### INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Tait, Weller & Baker, LLP, serves as the independent registered public accounting firm of the Company and will annually render an opinion on the financial statements of the Company. Tait, Weller & Baker, LLP is located at Two Liberty Place, 50 South 16<sup>th</sup> Street, Philadelphia, Pennsylvania 19102.

#### Base Prospectus

#### May 8, 2026

#### Tortoise Energy Infrastructure Corporation

#### Common Stock

#### Subscription Rights
*The Company.&nbsp;&nbsp;&nbsp;&nbsp;*Tortoise Energy Infrastructure Corporation (the "Company," "we" or "our") is a non-diversified, closed-end management investment company registered under the Investment Company Act of 1940, as amended ("1940 Act"). We have elected to be treated, and intend to comply with the requirements to qualify, as a regulated investment company ("RIC") under Subchapter M of the Internal Revenue Code of 1986, as amended (the "Code").

*Investment Objective.&nbsp;&nbsp;&nbsp;&nbsp;*Our investment objective is to seek a high level of total return with an emphasis on current distributions paid to stockholders. We cannot assure you that we will achieve our investment objective.

*Investment Strategy.&nbsp;&nbsp;&nbsp;&nbsp;*Under normal circumstances, we invest at least 90% of our total investments, defined as the value of all investments reported as total investments in our schedule of investments, in securities of energy infrastructure companies. Energy infrastructure companies engage in the business of transporting, processing, storing, distributing or marketing natural gas, natural gas liquids, coal, crude oil or refined petroleum products, or exploring, developing, managing or producing such commodities. Additionally energy infrastructure includes renewables and power infrastructure companies that generate, transport and distribute electricity.

We may incur leverage to the extent permitted by the 1940 Act.

*The Offering.&nbsp;&nbsp;&nbsp;&nbsp;*We may offer, from time to time, our shares of common stock, par value $0.001 per share ("Common Shares"), and/or subscription rights to purchase Common Shares ("Rights" and together with the Common Shares, "Securities") in one or more offerings in amounts, at prices and on terms set forth in one or more supplements to this Prospectus (each a "Prospectus Supplement"). You should read this Prospectus and any related Prospectus Supplement carefully before you decide to invest in the Securities.

We may offer Securities (1) directly to one or more purchasers, (2) through agents that the Fund may designate from time to time or (3) to or through underwriters or dealers. The Prospectus Supplement relating to a particular offering of Securities will identify any agents or underwriters involved in the sale of Securities, and will set forth any applicable purchase price, fee, commission or discount arrangement between us and agents or underwriters or among underwriters or the basis upon which such amount may be calculated. We may not sell Securities through agents, underwriters or dealers without delivery of this Prospectus and a Prospectus Supplement. See "Plan of Distribution."

*Additional Information.&nbsp;&nbsp;&nbsp;&nbsp;*This Prospectus, together with any related Prospectus Supplement, sets forth concisely information about the Company that a prospective investor should know before investing. You should retain this Prospectus and any Prospectus Supplement for future reference. A Statement of Additional Information, dated May 8, 2026 containing additional information about the Company has been filed with the SEC and is incorporated by reference in its entirety into this Prospectus. You may request a free copy of the Statement of Additional Information, the table of contents of which is on page 64 of this Prospectus, request a free copy of our annual, semi-annual and quarterly reports, request other information or make stockholder inquiries, by calling toll-free at 1-866-362-9331 or by writing to us at 5901 College Boulevard, Suite 400, Overland Park, Kansas 66211. Our annual and semi-annual reports and the Statement of Additional Information also are available on our investment adviser's website at *www.tortoiseadvisors.com.* Information included on such website does not form part of this Prospectus, except to the extent specifically incorporated by reference herein.

Our securities do not represent a deposit or obligation of, and are not guaranteed or endorsed by, any bank or other insured depository institution and are not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Our common stock is listed on the New York Stock Exchange ("NYSE") under the symbol "TYG." As of March 31, 2026, the net asset value and the last reported sale price for our common stock were $48.96 and $49.85 per share, representing a premium of 1.8%.

------

**Investment in our securities involves substantial risks arising from, among other things, our strategies, concentration in the energy infrastructure industry, non**-diversified **status, use of leverage for investment purposes, use of derivatives for investment and hedging purposes, and investment, directly or indirectly, in less liquid investments. You could lose some or all of your investment. See "Risk Factors" beginning on page 26 of this Prospectus. You should consider carefully these risks together with all of the other information contained in this Prospectus and any Prospectus Supplement before making a decision to purchase our securities.**

**Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.**

------

#### **TABLE OF CONTENTS**

---

| | |
|:---|:---|
|  | **Page** |
|  [Cautionary Notice Regarding Forward-Looking Statements](#T9901) | ii |
|  [Prospectus Summary](#T9902) | 1 |
|  [Summary of Company Expenses](#T9903) | 9 |
|  [Financial Highlights](#T9904) | 10 |
|  [Senior Securities](#T9905) | 11 |
|  [Market and Net Asset Value Information](#T9906) | 13 |
|  [Use of Proceeds](#T9907) | 14 |
|  [The Company](#T9908) | 15 |
|  [Investment Objective and Principal Investment Strategies](#T9909) | 16 |
|  [Leverage](#T9910) | 24 |
|  [Risk Factors](#T9911) | 26 |
|  [Management of the Company](#T9912) | 36 |
|  [Closed-End Company Structure](#T9913) | 39 |
|  [Certain Federal Income Tax Matters](#T9914) | 40 |
|  [Determination of Net Asset Value](#T9915) | 45 |
|  [Automatic Dividend Reinvestment and Cash Purchase Plan](#T9916) | 47 |
|  [Description of Securities](#T9917) | 49 |
|  [Certain Provisions in the Company's Charter and Bylaws](#T9918) | 57 |
|  [Plan of Distribution](#T9919) | 59 |
|  [Administrator and Custodian](#T9920) | 62 |
|  [Legal Matters](#T9921) | 63 |
|  [Available Information](#T9922) | 63 |
|  [Incorporation by Reference](#T9923) | 63 |

---

**You should rely only on the information contained or incorporated by reference in this Prospectus and any related Prospectus Supplement in making your investment decisions. We have not authorized any other person to provide you with different or inconsistent information. If anyone provides you with different or inconsistent information, you should not rely on it. This Prospectus and any Prospectus Supplement do not constitute an offer to sell or solicitation of an offer to buy any securities in any jurisdiction where the offer or sale is not permitted. The information appearing in this Prospectus and in any related Prospectus Supplement is accurate only as of the dates on their covers. Our business, financial condition and prospects may have changed since such dates. We will advise investors of any material changes to the extent required by applicable law.**

i

#### Cautionary Notice Regarding Forward-Looking Statements
This Prospectus, any accompanying Prospectus Supplement and the Statement of Additional Information contain "forward-looking statements." Forward-looking statements can be identified by the words "may," "will," "intend," "expect," "estimate," "continue," "plan," "anticipate," "could," "should" and similar terms and the negative of such terms. Such forward-looking statements may be contained in this Prospectus as well as in any accompanying Prospectus Supplement. By their nature, all forward-looking statements involve risks and uncertainties, and actual results could differ materially from those contemplated by the forward-looking statements. Several factors that could materially affect our actual results are the performance of the portfolio of securities we hold, the conditions in the U.S. and international financial, petroleum and other markets, the price at which our shares will trade in the public markets and other factors discussed in our periodic filings with the Securities and Exchange Commission.

Although we believe that the expectations expressed in our forward-looking statements are reasonable, actual results could differ materially from those projected or assumed in our forward-looking statements. Our future financial condition and results of operations, as well as any forward-looking statements, are subject to change and are subject to inherent risks and uncertainties, such as those disclosed in the "Risk Factors" section of this Prospectus. All forward-looking statements contained or incorporated by reference in this Prospectus or any accompanying Prospectus Supplement are made as of the date of this Prospectus or the accompanying Prospectus Supplement, as the case may be. Except for our ongoing obligations under the federal securities laws, we do not intend, and we undertake no obligation, to update any forward-looking statement. The forward-looking statements contained in this Prospectus and any accompanying Prospectus Supplement are excluded from the safe harbor protection provided by Section 27A of the Securities Act of 1933, as amended (the "1933 Act").

Currently known risk factors that could cause actual results to differ materially from our expectations include, but are not limited to, the factors described in the "Risk Factors" section of this Prospectus. We urge you to review carefully that section for a more detailed discussion of the risks of an investment in our securities.

ii

#### Prospectus Summary
*The following summary contains basic information about us and our securities. It is not complete and may not contain all of the information you may want to consider before investing in our securities. You should review the more detailed information contained in this Prospectus and in any related Prospectus Supplement and in the statement of additional information, especially the information set forth under the heading "Risk Factors" beginning on page 26 of this Prospectus.*

#### The Company
We seek to provide our stockholders with an efficient vehicle to invest in a portfolio of midstream energy infrastructure investments. Our investment objective is to seek a high level of total return with an emphasis on current distributions paid to stockholders. For purposes of our investment objective, total return includes capital appreciation of our common stock, and all distributions, regardless of the tax character of the distributions. Our investment objective is a nonfundamental investment policy. We cannot assure you that we will achieve our investment objective.

We are a non-diversified, closed-end management investment company registered under the Investment Company Act of 1940, as amended (the "1940 Act"). We were incorporated as a corporation in the State of Maryland on October 30, 2003, and we are governed by our charter (the "Charter"), our Bylaws (the "Bylaws") and the laws of the State of Maryland. Our fiscal year ends on November 30. We commenced operations in February 2004 following our initial public offering. Our common stock is listed on the New York Stock Exchange ("NYSE") under the symbol "TYG."

We concentrate our investments in the energy infrastructure sector. We pursue our objective by, under normal circumstances, investing at least 90% of our total investments, defined as the value of all investments reported as total investments in our schedule of investments, in securities of energy infrastructure companies. Energy infrastructure companies engage in the business of transporting, processing, storing, distributing, or marketing natural gas, natural gas liquids, coal, crude oil, or refined petroleum products, or exploring, developing, managing, or producing such commodities. Additionally, energy infrastructure includes renewables and power infrastructure companies that generate, transport and distribute electricity. The Company may opportunistically invest a portion of its assets in private investments to enhance income and total return, where consistent with its investment strategy.

#### Investment Adviser
Tortoise Capital Advisors, L.L.C. is our investment adviser. The Adviser's address is 5901 College Boulevard, Suite 400, Overland Park, Kansas 66211. As of March 31, 2026, the Adviser had approximately $10.8 billion of client assets under management. The Adviser may be contacted at the address listed on the first page of this Prospectus. The Adviser's Investment Committee is comprised of four individuals. See "Management of the Company."

#### The Offering
We may offer, from time to time, in one or more offerings, shares of our common stock, par value $0.001 per share ("Common Shares"), and/or subscription rights to purchase Common Shares ("Rights" and together with Common Shares, "Securities"), in any combination, on terms to be determined at the time of the offering. The Company may offer and sell such Securities directly to one or more purchasers, to or through underwriters, through dealers or agents that the Company designates from time to time, or through a combination of these methods. The Prospectus Supplement relating to any offering of Securities will describe such offering, including, as applicable, the names of any underwriters, dealers or agents and information regarding any applicable purchase price, fee, commission or discount arrangements made with those underwriters, dealers or agents or the basis upon which such amount may be calculated. For more information about the manners in which the Company may offer Securities, see "Plan of Distribution." The Prospectus Supplement relating to any Rights offering will set forth the number of Common Shares issuable upon the exercise of each Right (or number of Rights) and the other terms of such Rights offering. The minimum price on any day at which the Common Shares may be sold will not be less than the NAV per Common Share at the time of the offering plus the per share amount of any underwriting commission or discount; provided that Common Shares offered pursuant to Rights offerings that meet certain conditions may be offered at a price below the then-current NAV.

The Company may not sell any Securities through agents, underwriters or dealers without delivery, or deemed delivery, of a Prospectus, including the appropriate Prospectus Supplement, describing the method and terms of the particular offering of such Securities. You should read this Prospectus and the applicable Prospectus Supplement carefully before you invest in our Securities.

#### Use of Proceeds
Unless otherwise specified in a Prospectus Supplement, the net proceeds from any offering will be invested in accordance with the Company's investment objective and policies as stated below or used for general corporate purposes. The Company currently anticipates that it will be able to invest substantially all of the net proceeds in investments that meet the Company's investment objective and policies within approximately three months of the receipt of such proceeds. Pending investment, it is anticipated that the proceeds will be invested in short-term or long-term securities issued by the U.S. Government and its agencies or instrumentalities or in high-quality, short-term money market instruments.

#### Distributions
Our Board of Directors (our "Board") has adopted a managed distribution policy. Currently, distribution amounts are expected to fall in the range of 10% to 15% of our average week-ending NAV per share for the prior fiscal semi-annual period. Distribution amounts will be reset both up and down to provide a consistent return on trailing NAV. Under the managed distribution policy, distribution amounts will normally be reset in February and August, with no changes in distribution amounts in May and November. We may designate a portion of our distributions as capital gains and may also distribute additional capital gains in the last quarter of the year to meet annual excise tax distribution requirements. Distribution amounts are subject to change from time to time at the discretion of our Board.

In connection with the managed distribution policy, we may in the future rely on exemptive relief permitting us to make long-term capital gain distributions throughout the year. We distribute a fixed amount per Common Share, currently $0.4750, each month to our common stockholders.

We declare distributions quarterly and pay distributions monthly. We expect that the source of distributions will be investment company taxable income, as well as long-term capital gains or return of capital from investments. Investment company taxable income includes, among other items, dividends, interest (including any net tax-exempt interest), operational income from Master Limited Partnerships ("MLPs"), and net short-term capital gains, less expenses. Long-term capital gains reflect the realized market price received in the sale of an investment security in excess of its cost basis, less net capital losses, including any capital loss carryforwards. Distributions in cash may be reinvested automatically in additional whole shares only if the broker through whom you purchased shares makes such option available, and such shares will generally be reinvested by the broker based upon the market price of those shares and may be subject to brokerage commissions charged by the broker. All or a portion of such distribution may be taxable to shareholders and will generally be taxed as ordinary income or capital gains for federal income tax purposes. Such distributions will be taxable for federal income tax purposes whether they are paid in cash or reinvested in additional shares. To the extent a portion of distributions are treated as return of capital, such amounts are not currently taxable but reduce the shareholder's basis in the shares. Please see "Certain Federal Income Tax Matters."

#### Principal Investment Policies
Our investment objective is to seek a high level of total return with an emphasis on current distributions paid to stockholders. Under normal circumstances, we invest at least 90% of our total investments, defined as the value of all investments reported as total investments in our schedule of investments, in securities of energy infrastructure companies. Energy infrastructure companies engage in the business of transporting, processing, storing, distributing or marketing natural gas, natural gas liquids, coal, crude oil or refined petroleum products, or exploring, developing, managing or producing such commodities. Additionally energy infrastructure includes renewables and power infrastructure companies that generate, transport and distribute electricity.

We have adopted the following additional nonfundamental investment policies:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may invest up to 25% of our total assets in mlps.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may invest up to 30% of our total investments in restricted securities, primarily through direct placements. Subject to this policy, we may invest without limitation in illiquid securities. The types of restricted securities that we may purchase include securities of private energy infrastructure companies and privately issued securities of publicly traded energy infrastructure companies. Restricted securities, whether issued by public companies or private companies, are generally considered illiquid. The aggregate of all of our investments in private companies that do not have any publicly traded shares or units is limited to 5% of our total investments.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may invest up to 25% of our total investments in debt securities of energy infrastructure companies, including certain securities rated below investment grade ("junk bonds"). Below investment grade debt securities will be rated at least B3 by Moody's Investors Service, Inc. ("Moody's") and at least B- by Standard & Poor's Ratings Group ("S&P") at the time of purchase, or comparably rated by another statistical rating organization or if unrated, determined to be of comparable quality by the Adviser.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We will not invest more than 10% of our total investments in a single issuer.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We will not engage in short sales.

We may change our nonfundamental investment policies without stockholder approval and will provide notice to stockholders of material changes (including notice through stockholder reports); provided, however, that a change in the policy of investing at least 90% of our total assets in energy infrastructure companies requires at least 60 days' prior written notice to stockholders. Unless otherwise stated, these investment restrictions apply at the time of purchase, and we will not be required to reduce a position due solely to market value fluctuations. The term "total assets" includes assets obtained through leverage for the purpose of each investment restriction.

Under adverse market or economic conditions, we may invest up to 100% of our total assets in securities issued or guaranteed by the U.S. Government or its instrumentalities or agencies, short-term debt securities, certificates of deposit, bankers' acceptances and other bank obligations, commercial paper rated in the highest category by a rating agency or other liquid fixed income securities deemed by the Adviser to be consistent with a defensive posture (collectively, "short-term securities"), or we may hold cash. To the extent we invest in short-term securities or cash for defensive purposes, such investments are inconsistent with, and may result in us not achieving, our investment objective.

We may invest in securities of other investment companies registered under the 1940 Act, including mutual funds, ETFs, and closed-end funds for investment purposes of for short-term or temporary purposes. Our investments in securities of investment companies may include investment companies managed by our Adviser.

We also may invest in short-term securities or cash pending investment of offering proceeds or to meet working capital needs including, but not limited to, for collateral in connection with certain investment techniques, to hold a reserve pending payment of distributions, and to facilitate the payment of expenses and settlement of trades. The yield on such securities may be lower than the returns on MLPs or other equity securities or yields on lower rated fixed income securities.

#### Use of Leverage by the Company
The borrowing of money and the issuance of preferred stock and debt securities represents the leveraging of our common stock. The issuance of additional Common Shares may enable us to increase the aggregate amount of our leverage. We reserve the right at any time to use financial leverage to the extent permitted by the 1940 Act (up to 50% of total assets for preferred stock and up to 33 1/3% of total assets for debt securities and borrowings) or we may elect to reduce the use of leverage or use no leverage at all. Our policy is to utilize leverage in an amount that on average represents approximately 25% of our total assets. We consider market conditions at the time leverage is incurred and monitor for asset coverage ratios relative to 1940 Act requirements and our financial covenants on an ongoing basis. Leverage as a percent of total assets will vary depending on market conditions but will normally

range between 20% and 30%. The timing and terms of any leverage transactions will be determined by our Board. Additionally, the percentage of our assets attributable to leverage may vary significantly during periods of extreme market volatility and will increase during periods of declining market prices of our portfolio holdings.

We may use interest rate transactions for hedging purposes only, in an attempt to reduce the interest rate risk arising from our leveraged capital structure. We do not intend to hedge the interest rate risk of our portfolio holdings. Accordingly, if no leverage is outstanding, we currently do not expect to engage in interest rate transactions. Interest rate transactions that we may use for hedging purposes may expose us to certain risks that differ from the risks associated with our portfolio holdings. See "Leverage — Hedging Transactions" and "Risk Factors — Risks Related to Our Investments — Hedging Strategy Risk."

#### Principal Investment Risks

#### Risks of Our Investments
The Company's NAV, ability to make distributions, ability to service debt securities and preferred stock, and ability to meet asset coverage requirements depends on the performance of the investment portfolio. The performance of the Company's investment portfolio is subject to a number of risks.

*Concentration Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Under normal circumstances, we concentrate our investments in the energy infrastructure sector. The primary risks inherent in investments in entities in the energy infrastructure sector include the following: (1) the performance and level of distributions of energy infrastructure entities can be affected by direct and indirect commodity price exposure, (2) a decrease in market demand for natural gas or other energy commodities could adversely affect energy infrastructure entities' revenues or cash flows, (3) energy infrastructure assets deplete over time and must be replaced and (4) a rising interest rate environment could increase the cost of capital for energy infrastructure entities.

*Industry Specific Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Energy infrastructure companies also are subject to risks specific to the industry they serve.

*Non*-Diversification *Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We are registered as a non-diversified, closed-end management investment company under the 1940 Act. Accordingly, there are no regulatory limits under the 1940 Act on the number or size of securities that we hold, and we may invest more assets in fewer issuers compared to a diversified fund. However, in order to qualify as a RIC for federal income tax purposes, we must meet certain requirements.

*MLP Risks.&nbsp;&nbsp;&nbsp;&nbsp;*An investment in MLP securities involves some risks that differ from the risks involved in an investment in the common stock of a corporation, including governance risk, tax risk, and cash flow risk. Governance risk involves the risks associated with the ownership structure of MLPs. MLPs are also subject to tax risk, which is the risk that MLPs might lose their partnership status for tax purposes. Cash flow risk is the risk that MLPs will not make distributions to holders (including us) at anticipated levels or that such distributions will not have the expected tax character. As a result, there could be a material reduction in our cash flow and there could be a material decrease in the value of our common shares.

*Equity Securities Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Equity securities, including MLP common units, can be affected by macro-economic and other factors affecting the stock market in general, expectations of interest rates, investor sentiment toward the energy infrastructure sector, changes in a particular issuer's financial condition, or unfavorable or unanticipated poor performance of a particular issuer (in the case of MLPs, generally measured in terms of DCF). Prices of common units of individual MLPs and other equity securities also can be affected by fundamentals unique to the partnership or company, including size, earnings power, coverage ratios and characteristics and features of different classes of securities.

*Smaller Company Securities Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Investing in securities of smaller companies may involve greater risk than is associated with investing in more established companies. Companies with smaller capitalization may have limited product lines, markets or financial resources; may lack management depth or experience; and may be more vulnerable to adverse general market or economic developments than larger more established companies.

*Debt Securities Risk:&nbsp;&nbsp;&nbsp;&nbsp;*Investments in debt securities are generally subject to credit risk, extension risk, interest rate risk, prepayment risk and spread risk.

*Below Investment Grade Securities Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Investing in below investment grade debt instruments (commonly referred to as "junk bonds") involves additional risks than investment grade securities. Adverse changes in economic conditions are more likely to lead to a weakened capacity of a below investment grade issuer to make principal payments and interest payments than an investment grade issuer. An economic downturn could adversely affect the ability of highly leveraged issuers to service their obligations or to repay their obligations upon maturity.

Similarly, downturns in profitability in the energy infrastructure industry could adversely affect the ability of below investment grade issuers in that industry to meet their obligations. The market values of lower quality securities tend to reflect individual developments of the issuer to a greater extent than do higher quality securities, which react primarily to fluctuations in the general level of interest rates.

The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities. There are fewer dealers in the market for below investment grade securities than investment grade obligations. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger than for higher quality instruments. Under adverse market or economic conditions, the secondary market for below investment grade securities could contract further, independent of any specific adverse change in the condition of a particular issuer, and these instruments may become illiquid. As a result, it may be more difficult to sell these securities, or we may be able to sell the securities only at prices lower than if such securities were widely traded. This may affect adversely our ability to make required distribution or interest payments on our outstanding senior securities. Prices realized upon the sale of such lower-rated or unrated securities, under these circumstances, may be less than the prices used in calculating our NAV.

*Investment Company Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We may be subject to increased expenses and reduced performance as a result of our investments in other investment companies. When investing in other investment companies, we bear our pro rata share of the other investment company's fees and expenses including advisory and other fees and expenses. The resulting increase to our expenses may reduce performance. We will also be subject to all of the risks of the investment portfolio of the underlying fund.

*Market Disruption and Geopolitical Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Geopolitical events, such as war (including ongoing conflicts in Ukraine and the Middle East), terrorist attacks, natural or environmental disasters (including hurricanes, wildfires and flooding), country instability, public health emergencies (including epidemics and pandemics), market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers and other governmental trade or market control programs, the potential exit of a country from its respective union and related geopolitical events, have led and may in the future lead to market volatility and may have long-lasting impacts on U.S. and global economies and financial markets. Supply chain disruptions or significant changes in the supply or prices of commodities or other economic inputs may have material and unexpected effects on both global securities markets and individual countries, regions, sectors, companies or industries. Events occurring in one region of the world may negatively impact industries and regions that are not otherwise directly impacted by the events. Additionally, those events, as well as other changes in foreign and domestic political and economic conditions, could adversely affect individual issuers or related groups of issuers, securities markets, interest rates, secondary trading, credit ratings, inflation, investor sentiment and other factors affecting the value of the Company's investments.

Systemic risk events in the financial sectors and/or resulting government actions can negatively impact investments held by us. Global financial markets and economic conditions have been, and may continue to be, volatile due to a variety of factors, including significant write-offs in the financial services sector. Despite more stabilized economic activity, if the volatility continues, the cost of raising capital in the debt and equity capital markets, and the ability to raise capital, may be impacted. In particular, concerns about the general stability of financial markets and specifically the solvency of lending counterparties, may impact the cost of raising capital from the credit markets through increased interest rates, tighter lending standards, difficulties in refinancing debt on existing terms or at all and reduced, or in some cases ceasing to provide, funding to borrowers. In addition, lending counterparties under existing revolving credit facilities and other debt instruments may be unwilling or unable to meet their funding obligations. As a result of any of the foregoing, we or the companies in which we invest may be unable to obtain new debt or equity financing on acceptable terms.

*Capital Markets Volatility Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Our capital structure and performance may be adversely impacted by weakness in the credit markets and stock market if such weakness results in declines in the value of energy infrastructure entities in which we invest. If the value of our investments declines or remains volatile, there is a risk that we may be required to reduce outstanding leverage, which could adversely affect our stock price and ability to pay distributions at historical levels. A sustained economic slowdown may adversely affect the ability of energy infrastructure entities to sustain their historical distribution levels, which in turn, may adversely affect our ability to sustain distributions at historical levels. Energy infrastructure entities that have historically relied heavily on outside capital to fund their growth may be impacted by a slowdown in the capital markets. The performance of the energy infrastructure sector is dependent on several factors including the condition of the financial sector, the general economy and the commodity markets.

*Restricted Security Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Restricted securities are less liquid than securities traded in the open market because of statutory and contractual restrictions on resale. Such securities are, therefore, unlike securities that are traded in the open market, which can be expected to be sold immediately if the market is adequate. This lack of liquidity creates special risks for us.

*Liquidity Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Certain energy infrastructure securities may trade less frequently than those of other companies due to their smaller capitalizations. Investments in securities that are less actively traded or over time experience decreased trading volume may be difficult to dispose of when we believe it is desirable to do so, may restrict our ability to take advantage of other opportunities, and may be more difficult to value.

*Covered Call Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We cannot guarantee that our covered call option strategy will be effective. There are several risks associated with transactions in options on securities. The significant differences between the securities and options markets could result in an imperfect correlation between these markets. The use of options may require us to sell portfolio securities at inopportune times or for prices other than current market values, may limit the amount of appreciation we can realize on an investment, or may cause us to hold a security we might otherwise sell. There can be no assurance that a liquid market will exist when we seek to close out an option position. Factors such as supply and demand, interest rates, the current market price of the underlying security in relation to the exercise price of the option, the dividend or distribution yield of the underlying security, the actual or perceived volatility of the underlying security and the time remaining until the expiration date, could impact or cause to vary over time the amount of income we are able to generate through our covered call option strategy. The number of covered call options we can write is limited by the number of shares of the corresponding common stock we hold. Furthermore, our covered call option transactions may be subject to limitations established by each of the exchanges, boards of trade or other trading facilities on which such options are traded. If we fail to maintain any required asset coverage ratios in connection with any use by us of leverage, we may be required to redeem or prepay some or all of our leverage instruments. Such redemption or prepayment would likely result in our seeking to terminate early all or a portion of any option transaction. Early termination of an option could result in a termination payment by or to us.

*Hedging Strategy Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We may use interest rate transactions for hedging purposes only, in an attempt to reduce the interest rate risk arising from our leveraged capital structure. There is no assurance that the interest rate hedging transactions into which we enter will be effective in reducing our exposure to interest rate risk. Hedging transactions are subject to correlation risk, which is the risk that payment on our hedging transactions may not correlate exactly with our payment obligations on senior securities. Interest rate transactions that we may use for hedging purposes, such as swaps, caps and floors, will expose us to certain risks that differ from the risks associated with our portfolio holdings.

#### Risk of Our Operations
*Leverage Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We are currently leveraged and intend to continue to use leverage primarily for investment purposes. Leverage, which is a speculative technique, could cause us to lose money and can magnify the effect of any losses. Weakness in the credit markets may cause our leverage costs to increase and there is a risk that we may not be able to renew or replace existing leverage on favorable terms or at all. If the cost of leverage is no longer favorable, or if we are otherwise required to reduce our leverage, we may not be able to maintain common stock distributions at historical levels and common stockholders will bear any costs associated with selling portfolio securities. If our net asset value of our portfolio declines or remains subject to heightened market volatility, there is an increased risk that we will be unable to maintain coverage ratios for debt securities and preferred stock mandated by the 1940 Act, rating agency guidelines or contractual terms of bank lending facilities or privately placed notes.

If we do not cure any deficiencies within specified cure periods, we will be required to redeem such senior securities in amounts that are sufficient to restore the required coverage ratios or, in some cases, offer to redeem all of such securities. As a result, we may be required to sell portfolio securities at inopportune times, and we may incur significant losses upon the sale of such securities. There is no assurance that a leveraging strategy will be successful.

*Valuation Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We may invest up to 30% of total assets in restricted securities, which are subject to restrictions on resale. The value of such investments ordinarily will be based on fair valuations determined by the Adviser pursuant subject to oversight of the Board. Restrictions on resale or the absence of a liquid secondary market may affect adversely our ability to determine NAV. The sale price of securities that are restricted or otherwise are not readily marketable may be higher or lower than our most recent valuations.

*Market Discount Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Our common stock has traded both at a premium and at a discount in relation to NAV. We cannot predict whether our shares will trade in the future at a premium or discount to NAV.

*Management Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The skill of our Adviser plays a significant role in our ability to achieve our investment objective. Our ability to achieve our investment objective depends on the ability of the Adviser to identify economic and market trends and to select securities, especially in volatile markets. The Adviser could be incorrect in its analysis of industries, companies, and the relative attractiveness of securities. The Adviser may face competition in retaining and hiring investment professionals.

*Subsidiary Risk.&nbsp;&nbsp;&nbsp;&nbsp;*By investing in any Subsidiary, we will be indirectly exposed to the risks associated with such Subsidiary's investments. The instruments that will be held by any Subsidiary will generally be similar to those that are permitted to be held by the Company and will be subject to the same risks that apply to similar investments if held directly by the Company. The Subsidiaries will not be registered under the 1940 Act, and, unless otherwise noted, will not be subject to all of the protections of the 1940 Act. However, we will wholly own and control any Subsidiary, and we and any Subsidiary will each be managed by our Adviser and will share the same portfolio management team. Our Board will have oversight responsibility for the investment activities of the Company, including its investment in the Subsidiaries, and our role as sole shareholder of any Subsidiary. Changes in the laws of the United States and/or any jurisdiction in which a Subsidiary is formed could result in our inability or the inability of the Subsidiaries to operate as expected and could adversely affect the Company. See "Risk Factors — Company Risks — Subsidiary Risks."

*Tax Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We have elected to be treated, and intend to qualify each year, as a RIC under the Code. To maintain our qualification for federal income tax purposes as a RIC under the Code, we must meet certain source-of-income, asset diversification and annual distribution requirements, as discussed in detail below under "Certain U.S. Federal Income Tax Considerations." If for any taxable year we fail to qualify for the special federal income tax treatment afforded to RICs and we were ineligible to or otherwise did not cure such failure for the taxable year, we would fail to qualify as a RIC under the Code for such year, in which case all of our taxable income will be subject to federal income tax at regular corporate rates (without any deduction for distributions to our stockholders), our income available for distribution will be reduced, and all distributions from earnings and profits will be taxable to our shareholders as ordinary income to the extent of our current or accumulated earnings and profits.

*Cybersecurity Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The Company's service providers, including the Adviser, must rely in part on digital and network technologies (collectively "cyber networks") to conduct their businesses. Such cyber networks might in some circumstances be at risk of cyberattacks that could potentially seek unauthorized access to digital systems for purposes such as misappropriating sensitive information, corrupting data, or causing operational disruption. Cyberattacks might potentially be carried out by persons using techniques that could range from efforts to electronically circumvent network security or overwhelm websites to intelligence gathering and social engineering functions aimed at obtaining information necessary to gain access. Nevertheless, cyber incidents could potentially occur and might in some circumstances result in unauthorized access to sensitive information about the Adviser and other service providers or their clients, including the Company.

#### Risks of This Offering
*Market Impact Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The sale of our common stock (or the perception that such sales may occur) may have an adverse effect on prices in the secondary market for our common stock. An increase in the number of Common Shares available may put downward pressure on the market price for our Common Shares.

*Dilution Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The voting power of current stockholders will be diluted to the extent that such stockholders do not purchase shares in any future common stock offerings or rights offerings or do not purchase sufficient shares to maintain their percentage interest. If we are unable to invest the proceeds of such offering as intended, our per share distribution may decrease, and we may not participate in market advances to the same extent as if such proceeds were fully invested as planned.

*Delay in Use of Proceeds Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Although we expect to fully invest the net proceeds of any offering within three months after the closing of the offering, such investments may be delayed if suitable investments are unavailable at the time, if we are unable to secure firm commitments for direct investments, if market conditions and volumes of the securities of midstream energy entities are not favorable at the time or for other reasons.

#### Additional Risk of Subscription Rights
*Offering Risk.&nbsp;&nbsp;&nbsp;&nbsp;*There is a risk that changes in market conditions may result in the underlying common shares purchasable upon exercise of the subscription rights being less attractive to investors at the conclusion of the subscription period. This may reduce or eliminate the value of the subscription rights. Investors who receive subscription rights may find that there is no market to sell rights they do not wish to exercise. If investors exercise only a portion of the rights, the number of common shares issued may be reduced, and the common shares may trade at less favorable prices than larger offerings for similar securities.

*Dilution Risk.&nbsp;&nbsp;&nbsp;&nbsp;*As a result of any offering of subscription rights (each, a "Rights Offer"), it is anticipated that even if common stockholders fully exercise their rights, they should expect to incur immediate economic dilution and, if they do not exercise all of their rights, they will incur voting dilution. Further, both the sales load and the expenses associated with such an offering paid by the Company will immediately reduce the NAV of each common stockholder's common shares. To the extent that the number of common shares outstanding after a Rights Offer will have increased proportionately more than the increase in the size of the Company's net assets, stockholders will, at the completion of the Rights Offer, experience immediate dilution of NAV. In addition, if the subscription price for a Rights Offer is less than the Company's NAV per Common Share as of the expiration date of an Rights Offer, stockholders would experience additional immediate dilution of NAV as a result of the Rights Offer. If the Subscription Price is substantially less than the current NAV per common share at the expiration of a Rights Offer, such dilution could be substantial. It is anticipated that the existing common stockholders will experience immediate dilution even if they fully exercise their rights. In addition, whether or not common stockholders exercise their rights, they will experience a dilution of NAV of the common shares because they will indirectly bear the expenses of the Rights Offer, which include, among other items, SEC registration fees, printing expenses and the fees assessed by service providers (including the cost of the Company's counsel and independent registered public accounting firm). This dilution of NAV will disproportionately affect common stockholders who do not exercise their rights. The Company cannot precisely state the amount of any decrease because it is not known at this time how many Common Shares will be subscribed for or what the NAV or market price of the Common Shares will be on the expiration date of a Rights Offer or what the subscription price will be.

In addition to the economic dilution described above, if common stockholders do not exercise all of their rights, they will incur voting dilution as a result of a Rights Offer. This voting dilution will occur because such non-exercising common stockholders will own a smaller proportionate interest in the Company after the Rights Offer than they owned prior to the Rights Offer.

See "Risk Factors" for a more detailed discussion of these risks.

#### Summary of Company Expenses

#### Stockholder Transaction Expenses (as a percentage of offering price)

---

| | |
|:---|:---|
|  Sales Load | ___<br><sup>(1)</sup> |
|  Offering Expenses Borne by the Company (as a percentage of offering price) | ___<br><sup>(1)</sup> |
|  Dividend Reinvestment and Cash Purchase Plan Fees (in dollars)<sup>(2)</sup> | $15 |

---

---

| | |
|:---|:---|
|  **Annual Expenses (as a percentage of net assets attributable to common stock)** | **Percentage of <br>Net Assets <br>Attributable to <br>Common Shares<sup>(3)</sup>** |
|  Management Fee<sup>(4)</sup> | 1.20% |
|  Interest Payments on Borrowed Funds (includes issuance costs)<sup>(5)</sup> | 0.92% |
|  Distribution Payments on Preferred Stock (includes issuance costs)<sup>(6)</sup> | 0.26% |
|  Other Expenses<sup>(7)</sup> | 0.75% |
|  Total Annual Expenses (excluding tax liability) | 3.13% |

---

____________

(1)&nbsp;&nbsp;&nbsp;&nbsp; If the securities to which this Prospectus relates are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load, the estimated offering expenses borne by us and a revised expense example.

(2)&nbsp;&nbsp;&nbsp;&nbsp; Stockholders will pay a transaction fee of $15 plus brokerage charges if they direct the Plan Agent to sell Common Shares held in a Plan account. See "Automatic Dividend Reinvestment and Cash Purchase Plan."

(3)&nbsp;&nbsp;&nbsp;&nbsp; Based on average Net Assets for fiscal period ended November 30, 2025.

(4)&nbsp;&nbsp;&nbsp;&nbsp; Reflects management fee as of November 30, 2025. "Management Fee" is based on our Managed Assets, which means the total assets of the Company (including any assets attributable to leverage that may be outstanding), minus the sum of accrued liabilities (other than deferred taxes or debt representing financial leverage), and reflects an annual rate of 0.95% of average monthly Managed Assets up to $2.5 billion, 0.90% of average monthly Managed Assets between $2.5 billion and $3.5 billion, and 0.85% of average monthly Managed Assets above $3.5 billion. There is no investment advisory agreement with, or management fees charged to, any Subsidiary.

(5)&nbsp;&nbsp;&nbsp;&nbsp; Reflects actual cost of interest on the debt securities and unsecured credit facility as of November 30, 2025, including amortization of issuance costs.

(6)&nbsp;&nbsp;&nbsp;&nbsp; Reflects actual cost of distributions on Outstanding MRP Shares as of November 30, 2025, including amortization of issuance costs.

(7)&nbsp;&nbsp;&nbsp;&nbsp; "Other Expenses" reflects actual costs incurred as of fiscal period ended November 30, 2025 for operational expenses, including payments to our transfer agent, administrator, custodian, fund account and legal and accounting expenses.

The preceding table and following example contain information about the various costs and expenses that common stockholders will bear directly or indirectly. For additional information with respect to our expenses, see "Management of the Company."

#### Example:
The following example demonstrates the hypothetical dollar amount of total cumulative expenses that would be incurred over various periods with respect to a hypothetical investment in our common stock. The following example illustrates the expenses that common stockholders would pay on a $1,000 investment in common stock, assuming (1) total annual expenses of attributable to common shares remain the same as set forth above; (2) a 5% annual return; and (3) all distributions are reinvested at NAV:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **1 Year** | **3 Years** | **5 Years** | **10 Years** |
|  Total Expenses Paid by Common Stockholders<sup>(8)</sup> | $31 | $96 | $163 | $343 |

---

**The Example should not be considered a representation of future expenses. Actual expenses may be greater or less than those shown above.**

#### Financial Highlights
The information contained under the heading "TYG Financial Highlights" in our [Annual Report](http://www.sec.gov/ix?doc=/Archives/edgar/data/0001268533/000121390026013154/ea0272590-01_ncsr.htm) to shareholders on Form N-CSR for the fiscal year ended November 30, 2025 (the "Annual Report") is incorporated herein by reference. The financial highlights table is intended to help you understand the Company's financial performance. The information in this table for the fiscal year ended November 30, 2025 is derived from the Company's financial statements in the Annual Report audited by Tait, Weller & Baker LLP, independent registered public accounting firm and for the fiscal years ended November 30, 2024, 2023, 2022 and 2021 from the Company's financial statements in the Annual Report audited by Ernst & Young LLP, independent registered public accounting firm for such periods. The information contained under the heading "TYG Financial Highlights" in our [Annual Report](http://www.sec.gov/Archives/edgar/data/1268533/000120677421000312/tyg3863772-ncsr.htm) to shareholders on Form N-CSR for the fiscal year ended November 30, 2020, which includes Financial Highlights for the fiscal years ending November 30, 2020, 2019, 2018, 2017 and 2016 is incorporated herein by reference.

#### Senior Securities
The following table sets forth information regarding the Company's outstanding senior securities as of the end of the Company's last ten fiscal years, as applicable. Information for the fiscal year ended November 30, 2025 has been audited by Tait, Weller & Baker LLP, the Company's independent registered public accounting firm. Information for fiscal years prior to the fiscal year ended November 30, 2025 has been audited by Ernst & Young LLP.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  **Fiscal Year <br>Ended** | **Aggregate <br>Principal <br>Amount/<br>Liquidation <br>Preference<br>Outstanding <br>(000)** | **Asset<br>Coverage, per <br>$1,000<sup>(a)</sup>** | **Asset Coverage, <br>per $10 <br>Liquidation <br>Value Share<sup>(b)</sup>** | **Market <br>Value<sup>(c)</sup>** | **Type of Senior Security** |
| 2016 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $442500 | $3858 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $165000 |  | $30 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $109300 | $3858 |  |  | Borrowings |
| 2017 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $412500 | $3564 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $165000 |  | $27 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $112700 | $3564 |  |  | Borrowings |
| 2018 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $380000 | $3926 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $165000 |  | $29 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $107100 | $3926 |  |  | Borrowings |
| 2019 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $365000 | $3387 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $165000 |  | $25 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $93900 | $3387 |  |  | Borrowings |
| 2020 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $87927 | $4399 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $32300 |  | $33 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $13200 | $4399 |  |  | Borrowings |
| 2021 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $83893 | $5194 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $32300 |  | $40 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $19200 | $5194 |  |  | Borrowings |
| 2022 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $81632 | $5293 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $35661 |  | $40 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $30700 | $5293 |  |  | Borrowings |
| 2023 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $64853 | $6768 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $35661 |  | $45 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $&nbsp;&nbsp;&nbsp;&nbsp;7300 | $6768 |  |  | Borrowings |
| 2024 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $50333 | $7500 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $35661 |  | $54 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $41200 | $7500 |  |  | Borrowings |

---

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  **Fiscal Year <br>Ended** | **Aggregate <br>Principal <br>Amount/<br>Liquidation <br>Preference<br>Outstanding <br>(000)** | **Asset<br>Coverage, per <br>$1,000<sup>(a)</sup>** | **Asset Coverage, <br>per $10 <br>Liquidation <br>Value Share<sup>(b)</sup>** | **Market <br>Value<sup>(c)</sup>** | **Type of Senior Security** |
| 2025 |  |  |  |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $137910 | $6015 |  |  | Notes |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $69905 |  | $45 |  | Preferred Stock |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $72100 | $6015 |  |  | Borrowings |

---

____________

(a)&nbsp;&nbsp;&nbsp;&nbsp; Calculated by subtracting the Company's total liabilities and indebtedness (excluding senior notes, credit facility borrowings, and preferred stock) from the Company's total assets and dividing the result by the aggregate amount of senior notes and credit facility borrowings outstanding at the end of the period, and by multiplying the results by $1,000.

(b)&nbsp;&nbsp;&nbsp;&nbsp; Calculated by subtracting the Company's total liabilities and indebtedness (excluding senior notes, credit facility borrowings, and preferred stock) from the Company's total assets and dividing the result by the aggregate amount of senior notes, credit facility borrowings, and preferred stock outstanding at the end of the period, and multiplying the result by $10 liquidation value per share.

(c)&nbsp;&nbsp;&nbsp;&nbsp; Preferred stock and notes are issued on a private basis and do not have market values.

Please refer to the sections of our most recent annual report on Form N-CSR entitled "Senior Notes" and "Mandatory Redeemable Preferred Stock", which is incorporated by reference herein, for information on our senior securities holdings.

#### Market and Net Asset Value Information
Our common stock is listed on the NYSE under the symbol "TYG." Our Common Shares commenced trading on the NYSE on February 25, 2004.

Our Common Shares have traded both at a premium and at a discount in relation to NAV. We cannot predict whether our shares will trade in the future at a premium or discount to NAV. The provisions of the 1940 Act generally require that the public offering price of common stock (less any underwriting commissions and discounts) must equal or exceed the NAV per share of a company's additional common stock (calculated within 48 hours of pricing). Our issuance of additional Common Shares may have an adverse effect on prices in the secondary market for our Common Shares by increasing the number of Common Shares available, which may put downward pressure on the market price for our Common Shares. The continued development of alternatives as vehicles for investing in a portfolio of energy infrastructure MLPs, including other publicly traded investment companies and private funds, may reduce or eliminate any tendency of our Common Shares to trade at a premium in the future. Shares of common stock of closed-end investment companies frequently trade at a discount from NAV. See "Risk Factors — Risks Related to Our Operations — Market Discount Risk."

The following table sets forth for each of the periods indicated the high and low closing market prices for our Common Shares on the NYSE, the NAV per share and the premium or discount to NAV per share at which our Common Shares were trading. See "Determination of Net Asset Value" for information as to the determination of our NAV.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Market Price<sup>(1)</sup>** | **Market Price<sup>(1)</sup>** | | **Premium/(Discount) to NAV<sup>(3)</sup>** | **Premium/(Discount) to NAV<sup>(3)</sup>** |
|  **Fiscal Quarter Ended** | **High** | **Low** | **NAV<sup>(2)</sup>** | **High** | **Low** |
|  February 2024 | $29.82 | $27.63 | $35.33 | (15.6)% | (21.8)% |
|  May 2024 | $35.15 | $29.17 | $35.56 | (1.2)% | (18.0)% |
|  August 2024 | $36.98 | $32.65 | $40.48 | (8.6)% | (19.3)% |
|  November 2024 | $46.00 | $35.59 | $42.82 | 7.4% | (16.9)% |
|  February 2025 | $48.43 | $41.30 | $52.23 | (7.3)% | (20.9)% |
|  May 2025 | $44.40 | $35.42 | $48.51 | (8.5)% | (27.0)% |
|  August 2025 | $43.89 | $41.04 | $44.80 | (2.0)% | (8.4)% |
|  November 2025 | $44.39 | $41.90 | $45.76 | (3.0)% | (8.4)% |
|  February 2026 | $49.85 | $40.41 | $46.74 | 6.7% | (13.5)% |

---

____________

(1)&nbsp;&nbsp;&nbsp;&nbsp; Based on high and low closing market price for the respective quarter.

(2)&nbsp;&nbsp;&nbsp;&nbsp; Based on the NAV at the beginning of each respective quarter, calculated on the close of business on the last business day of the prior quarter.

(3)&nbsp;&nbsp;&nbsp;&nbsp; Calculated based on the market value and net asset value information presented in the table. Percentages are rounded.

The last reported NAV, the market price and percentage premium to NAV per Common Share on March 31, 2026 were $48.96, $49.85 and 1.8% respectively. As of March 31, 2026, we had 21.12 million Common Shares outstanding and net assets of approximately $1.0 billion.

#### Use of Proceeds
Unless otherwise specified in a Prospectus Supplement, we intend to invest the proceeds of this offering in accordance with our investment objective and policies and for general corporate purposes. We anticipate that the proceeds will be invested promptly as investment opportunities are identified, depending on market conditions and the availability of appropriate securities, and it is anticipated to take not more than approximately three months from the closing of any offering. Pending investment, it is anticipated that the proceeds will be invested in short-term or long-term securities issued by the U.S. Government and its agencies or instrumentalities or in high-quality, short-term money market instruments.

#### The Company
We are a non-diversified, closed-end management investment company registered under the Investment Company Act of 1940, as amended (the "1940 Act"). We were incorporated as a corporation in the State of Maryland on October 30, 2003, and we are governed by our charter (the "Charter"), our Bylaws (the "Bylaws") and the laws of the State of Maryland. Our fiscal year ends on November 30. We commenced operations in February 2004 following our initial public offering. Our common stock is listed on the New York Stock Exchange ("NYSE") under the symbol "TYG." As of March 31, 2026, we had net assets of approximately $1.0 billion attributable to our common stock and total managed assets of $1.4 billion.

The following table provides information about our outstanding securities as of April 30, 2026:

---

| | | | |
|:---|:---|:---|:---|
|  **Title of Class** | **Amount of <br>Stock <br>Authorized/<br>Aggregate <br>Principal <br>Amount <br>Authorized** | **Amount<br> Held by the<br> Company or<br> for its<br> Account** | **Amount<br> Outstanding** |
|  **Common Stock** | 100000000 | 0 | 21129595 |
|  **Notes:** |  |  |  |
|  **Series PP** | $8066667 | 0 | $8066667 |
|  **Series QQ** | $10000000 | 0 | $10000000 |
|  **Series RR** | $25000000 | 0 | $25000000 |
|  **Series TT** | $1936386 | 0 | $1936386 |
|  **Series UU** | $25000000 | 0 | $25000000 |
|  **Series VV** | $20000000 | 0 | $20000000 |
|  **Series WW** | $35000000 | 0 | $35000000 |
|  **MRP:** |  |  |  |
|  **Series F** | 2000000 | 0 | 2000000 |
|  **Series G** | 1500000 | 0 | 1500000 |
|  **MRP H** | 96212 | 0 | 96212 |
|  **MRP I** | 300000 | 0 | 300000 |
|  **MRP J** | 2500000 | 0 | 2500000 |

---

#### Investment Objective and Principal Investment Strategies

#### Investment Objective
Our investment objective is to seek a high level of total return with an emphasis on current distributions paid to stockholders. For purposes of our investment objective, total return includes capital appreciation of, and all distributions received from, securities in which we invest regardless of the tax character of the distributions. We seek to provide our stockholders with an efficient vehicle to invest in a portfolio of securities of energy infrastructure companies.

#### Energy Infrastructure Industry
We concentrate our investments in the energy infrastructure sector. We pursue our objective by, under normal circumstances, investing at least 90% of our total investments, defined as the value of all investments reported as total investments in our schedule of investments, in securities of energy infrastructure companies. Energy infrastructure companies engage in the business of transporting, processing, storing, distributing, or marketing natural gas, natural gas liquids, coal, crude oil, or refined petroleum products, or exploring, developing, managing, or producing such commodities. Additionally, energy infrastructure includes renewables and power infrastructure companies that generate, transport and distribute electricity. A more detailed description of investment policies and restrictions and more detailed information about portfolio investments are contained in the Statement of Additional Information.

*Energy Infrastructure Companies.*

Midstream energy infrastructure entities in which we invest generally can be classified in the following categories:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<u>Pipeline Entities</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*Pipeline entities are common carrier transporters of natural gas, natural gas liquids (primarily propane, ethane, butane and natural gasoline), crude oil or refined petroleum products (gasoline, diesel fuel and jet fuel). Pipeline entities also may operate ancillary businesses such as storage and marketing of such products. Revenue is derived from capacity and transportation fees. Historically, pipeline output has been less exposed to cyclical economic forces due to its low-cost structure and government-regulated nature. In addition, most pipeline entities have limited direct commodity price exposure because they do not own the product being shipped.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<u>Gathering and Processing Entities</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*Gathering and processing entities are gatherers and processors of natural gas, as well as providers of transportation, fractionation and storage of natural gas liquids ("NGLs"). Revenue is derived from providing services to natural gas producers, which require treatment or processing before their natural gas commodity can be marketed to utilities and other end user markets. Revenue for the processor may be fee based or tied to the prices of the natural gas and NGL commodities.

Power and utility infrastructure entities in which we invest generally can be classified as those providing products, services or equipment for the generation or distribution of electricity, gas or water. Historically, regulated power generation and demand is less exposed to cyclical economic forces due to its low-cost structure and government-regulated nature. In addition, regulated power entities have limited direct commodity price exposure because they do not own the product being shipped. By contrast, unregulated power companies in which we may invest are exposed to prevailing power prices in the market to which they sell power.

#### Investment Process
Under normal circumstances, we invest at least 90% of our total investments in securities of energy infrastructure companies. The Adviser seeks to invest in securities that offer a combination of quality, growth and yield intended to result in superior total returns over the long run. The Adviser's securities selection process includes a comparison of quantitative, qualitative, and relative value factors. Although the Adviser intends to use research provided by broker-dealers and investment firms, primary emphasis will be placed on proprietary analysis and valuation models conducted and maintained by the Adviser's in-house investment analysts. To determine whether a company meets its criteria, the Adviser generally will look for a strong record of distribution growth, a solid ratio

of debt to equity and coverage ratio with respect to distributions to unit holders, and a proven track record, incentive structure and management team. It is anticipated that all entities in which we invest will have a market capitalization greater than $100 million at the time of investment.

#### Investment Policies
We seek to achieve our investment objective by investing primarily in securities of energy infrastructure companies that the Adviser believes offer attractive distribution rates and capital appreciation potential. We also may invest in other securities set forth below if the Adviser expects to achieve our objective with such investments.

The following are our fundamental investment limitations set forth in their entirety. We may not:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;issue senior securities, except as permitted by the 1940 Act and the rules and interpretive positions of the SEC thereunder;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;borrow money, except as permitted by the 1940 Act and the rules and interpretive positions of the SEC thereunder;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;make loans, except by the purchase of debt obligations, by entering into repurchase agreements or through the lending of portfolio securities and as otherwise permitted by the 1940 Act and the rules and interpretive positions of the SEC thereunder;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;concentrate (invest 25% or more of total assets) our investments in any particular industry, except that we will concentrate our assets in the group of industries constituting the energy infrastructure sector;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;underwrite securities issued by others, except to the extent that we may be considered an underwriter within the meaning of the 1933 Act, in the disposition of restricted securities held in our portfolio;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;purchase or sell real estate unless acquired as a result of ownership of securities or other instruments, except that we may invest in securities or other instruments backed by real estate or securities of companies that invest in real estate or interests therein; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;purchase or sell physical commodities unless acquired as a result of ownership of securities or other instruments, except that we may purchase or sell options and futures contracts or invest in securities or other instruments backed by physical commodities.

Our policy of investing at least 90% of our total investments in securities of energy infrastructure companies is nonfundamental and may be changed by the Board without stockholder approval, provided that stockholders receive at least 60 days' prior written notice of any change.

We have adopted the following additional nonfundamental policies:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may invest up to 30% of our total investments in restricted securities, primarily through direct placements. Subject to this policy, we may invest without limitation in illiquid securities. The types of restricted securities that we may purchase include securities of private energy infrastructure companies and privately issued securities of publicly traded energy infrastructure companies. Restricted securities, whether issued by public companies or private companies, are generally considered illiquid. The aggregate of our investments in private companies that do not have any publicly traded shares or units is limited to 5% of our total investments.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We may invest up to 25% of our total investments in debt securities of energy infrastructure companies, including certain securities rated below investment grade ("junk bonds"). Below investment grade debt securities will be rated at least B3 by Moody's and at least B – by S&P at the time of purchase, or comparably rated by another statistical rating organization or if unrated, determined to be of comparable quality by the Adviser.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We will not invest more than 10% of our total assets in any single issuer.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We will not engage in short sales.

Unless otherwise stated, these investment restrictions apply at the time of purchase, and we will not be required to reduce a position due solely to market value fluctuations.

As used in the bullets above, the term "total investments" is defined as the value of all investments reported as total investments on our schedule of investments. During the period in which we are investing the net proceeds of an offering, we may deviate from our investment policies with respect to the net proceeds of the offering by investing the net proceeds in cash, cash equivalents, securities issued or guaranteed by the U.S. Government or its instrumentalities or agencies, high quality, short-term money market instruments, short-term debt securities, certificates of deposit, bankers' acceptances and other bank obligations, commercial paper rated in the highest category by a rating agency or other liquid fixed income securities.

#### Investment Securities
The types of securities in which we may invest include, but are not limited to, the following:

*Equity Securities.&nbsp;&nbsp;&nbsp;&nbsp;*We invest in common and preferred stock, limited partner interests, convertible securities, warrants and depository receipts of companies that are organized as corporations, limited liability companies or limited partnerships. Common stock generally represents an equity ownership interest in an issuer. Although common stocks have historically generated higher average total returns than fixed-income securities over the long term, common stocks also have experienced significantly more volatility in those returns and may underperform relative to fixed-income securities during certain periods. An adverse event, such as an unfavorable earnings report, may depress the value of a particular common stock we hold. Also, prices of common stocks are sensitive to general movements in the stock market and a drop in the stock market may depress the price of common stocks to which we have exposure. Common stock prices fluctuate for several reasons including changes in investors' perceptions of the financial condition of an issuer or the general condition of the relevant stock market, or when political or economic events affecting the issuers occur. In addition, common stock prices may be particularly sensitive to rising interest rates, which increases borrowing costs and the costs of capital.

*Equity Securities of MLPs.&nbsp;&nbsp;&nbsp;&nbsp;*We may invest in equity securities issued by energy infrastructure MLPs.

*MLP Common Units.&nbsp;&nbsp;&nbsp;&nbsp;*MLP common units represent an equity ownership interest in a partnership, providing limited voting rights and entitling the holder to a share of the company's success through distributions and/or capital appreciation. Unlike stockholders of a corporation, common unit holders do not elect directors annually and generally have the right to vote only on certain significant events, such as mergers, a sale of substantially all of the assets, removal of the general partner or material amendments to the partnership agreement. MLPs are required by their partnership agreements to distribute a large percentage of their current operating earnings. Common unit holders generally have first right to a minimum quarterly distribution ("MQD") prior to distributions to the convertible subordinated unit holders or the general partner (including incentive distributions). Common unit holders typically have arrearage rights if the MQD is not met. In the event of liquidation, MLP common unit holders have first rights to the partnership's remaining assets after bondholders, other debt holders, and preferred unit holders have been paid in full. MLP common units trade on a national securities exchange or over-the-counter. Also, like common stock prices, MLP common units are sensitive to general movements in the stock market and a drop in the stock market may depress the price of MLP common units to which we have exposure.

*Debt Securities.&nbsp;&nbsp;&nbsp;&nbsp;*We may invest up to 25% of our total investments in debt securities of energy infrastructure companies, including corporate bonds and notes, project finance debt securities, bank loans and loan participations, of issuers operating in essential asset sectors, and securities rated below investment grade (commonly referred to as "junk bonds"). These debt securities may have fixed or variable principal payments and all types of interest rate and dividend payment and reset terms, including fixed rate, adjustable rate, zero coupon, contingent, deferred and payment-in-kind features. To the extent that we invest in below investment grade debt securities, such securities will be rated, at the time of investment, at least B- by S&P or B3 by Moody's or a comparable rating by at least one other rating agency or, if unrated, determined by the Adviser to be of comparable quality. If a security satisfies our minimum rating criteria at the time of purchase and subsequently is downgraded below such rating, we will not be required to dispose of such security. If a downgrade occurs, the Adviser will consider what action, including the sale of such security, is advisable and in the best interest of us and our stockholders.

Because the risk of default is higher for below investment grade securities than investment grade securities, the Adviser's research and credit analysis is an especially important part of managing securities of this type. The Adviser attempts to identify those issuers of below investment grade securities whose financial condition the Adviser believes is adequate to meet future obligations or has improved or is expected to improve in the future. The Adviser's analysis focuses on relative values based on such factors as interest or dividend coverage, asset coverage, earnings prospects and the experience and managerial strength of the issuer.

We may invest in corporate debt securities that are purchased and sold in private offerings pursuant to Rule 144A or other applicable exemptions from the registration requirements of the Securities Act. We may purchase or sell corporate debt securities on a when-issued, delayed-delivery or forward commitment basis. We currently have no specific maturity policy with respect to debt securities.

The corporate debt securities in which we invest generally will be high yield debt securities. Because the performance of high yield corporate debt securities, especially during periods of market stress, may be affected by changes, or perceived changes, in the issuer's business, financial condition or prospects, the performance of our investments in high yield corporate debt securities may be correlated with the performance of equity securities, including the equity securities in which we invest. Accordingly, there can be no assurance that the allocation of our assets among equity and debt securities will provide our common stockholders with any of the benefits typically associated with asset class diversification.

*Restricted Securities.&nbsp;&nbsp;&nbsp;&nbsp;*We may invest up to 30% of our total investments in restricted securities, primarily through direct placements. An issuer may be willing to offer the purchaser more attractive features with respect to securities issued in direct placements because it has avoided the expense and delay involved in a public offering of securities. Adverse conditions in the public securities markets also may preclude a public offering of securities. MLP convertible subordinated units typically are purchased in private placements and do not trade on a national exchange or over the counter, and there is no active market for convertible subordinated units. MLP convertible subordinated units typically are purchased from affiliates of the issuer or other existing holders of convertible units rather than directly from the issuer.

Restricted securities obtained by means of direct placements are less liquid than securities traded in the open market because of statutory and contractual restrictions on resale. Such securities are, therefore, unlike securities that are traded in the open market, which are likely to be sold immediately if the market is adequate. This lack of liquidity creates special risks. However, we could sell such securities in privately negotiated transactions with a limited number of purchasers or in public offerings under the 1933 Act. MLP convertible subordinated units also convert to publicly traded common units upon the passage of time and/or satisfaction of certain financial tests.

*Securities of Investment Companies.&nbsp;&nbsp;&nbsp;&nbsp;*We may invest in securities of other investment companies, including mutual funds, ETFs and closed-end funds, to achieve our investment objective or for temporary or defensive purposes, including investing in securities of other investment companies managed by the Adviser to the extent permitted by the 1940 Act. We may invest in securities of other investment companies for any purpose consistent with our investment objective and strategies including seeking exposure to specific asset classes or less liquid investments.

*Temporary and Defensive Investments.&nbsp;&nbsp;&nbsp;&nbsp;*Pending investment of offering or leverage proceeds, we may invest such proceeds in securities issued or guaranteed by the U.S. Government or its instrumentalities or agencies, short-term debt securities, certificates of deposit, bankers' acceptances and other bank obligations, commercial paper rated in the highest category by a rating agency or other liquid fixed income securities deemed by the Adviser to be of similar quality (collectively, "short-term securities"), or in cash or cash equivalents, all of which are expected to provide a lower yield than the securities of energy infrastructure companies. We also may invest in short-term securities or cash on a temporary basis to meet working capital needs including, but not limited to, for collateral in connection with certain investment techniques, to hold a reserve pending payment of distributions, and to facilitate the payment of expenses and settlement of trades.

Under adverse market or economic conditions, we may invest up to 100% of our total investments in short-term securities or cash. The yield on short-term securities or cash may be lower than the returns on MLPs and other equity securities or yields on lower rated fixed income securities. To the extent we invest in short-term securities or cash for defensive purposes, such investments are inconsistent with, and may result in our not achieving, our investment objective.

#### Covered Call Options Strategy
We may also seek to provide current income from gains earned through a covered call option strategy. A call option on a security is a contract that gives the holder of such call option the right to buy the security underlying the call option from the writer of such call option at a specified price (exercise price) at any time during the term of the option. At the time the call option is sold, the writer of a call option receives a premium from the buyer of such call option.

If we write a call option on a security or basket of securities, we have the obligation upon exercise of such call option to deliver the underlying security or securities upon payment of the exercise price. As the writer of such call options, in effect, during the term of the option, in exchange for the premium received by us, we sell the potential appreciation above the exercise price in the value of securities covered by the options. Therefore, we forego part of the potential appreciation for part of our equity portfolio in exchange for the call premium received but retain the risk of potential decline in those securities below the price which is equal to the excess of the exercise price of the call option over the premium per share received on the call option.

If we write a call option, we may terminate our obligation by effecting a closing purchase transaction. This is accomplished by purchasing a call option with the same terms as the option previously written. However, once we have been assigned an exercise notice, we will be unable to effect a closing purchase transaction. There can be no assurance that a closing purchase transaction can be effected when we so desire.

Other principal factors affecting the market value of an option include supply and demand, interest rates, the current market price and price volatility of the underlying security and the time remaining until the expiration date of the option. Gains and losses on investments in options depend, in part, on the ability of our Adviser to correctly predict the effect of these factors.

When we write a call option, an amount equal to the premium received by us will be recorded as a liability and will be subsequently adjusted to the current fair value of the option written. Premiums received from writing options that expire unexercised are treated by us as realized gains from investments on the expiration date. If we repurchase a written call option prior to its exercise, the difference between the premium received and the amount paid to repurchase the option is treated as a realized gain or realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether we have realized a gain or loss.

Although our Adviser will attempt to take appropriate measures to minimize the risks relating to writing covered call options, there can be no assurance that we will succeed in any option-writing program we undertake.

#### Subsidiaries
If our Adviser determines it to be appropriate or necessary, we may form one or more wholly owned subsidiaries in one or more jurisdictions, each of which is expected to be treated as a corporation for U.S. federal income tax purposes. We may invest either directly or indirectly through the subsidiaries. We will be the sole shareholder of any subsidiary, and it is currently expected that shares of any subsidiary will not be sold or offered to other investors. We may invest an aggregate of up to 5% of our total investments in subsidiaries.

The subsidiaries will not be registered under the 1940 Act and will not be subject to all of the investor protections of the 1940 Act. In addition, changes in the laws of the United States and/or any jurisdiction in which a subsidiary is formed could result in our inability or the inability of the subsidiaries to operate as described in this Prospectus and the SAI and could adversely affect us. Our Board has oversight responsibility for our investment activities, including our investments in any subsidiary, and our role as the sole shareholder of any subsidiary.

The assets of any subsidiaries and our assets taken as a whole, will be subject to the same investment restrictions and limitations, and the subsidiary will be subject to the same compliance policies and procedures as the Company. As a result, investments held through a subsidiary will be considered in determining compliance with the investment policies and restrictions that apply to the management of the Company, and, in particular, to the requirements relating to portfolio leverage, affiliated transactions and the timing and method of the valuation of any subsidiary's portfolio investments.

#### Portfolio Turnover
Our annual portfolio turnover rate may vary greatly from year to year. For the fiscal years ended November 30, 2025 and 2024, our actual portfolio turnover rates were 127% and 219%, respectively. Portfolio turnover rate is not considered a limiting factor in the execution of investment decisions for us. A higher turnover rate results in correspondingly greater brokerage commissions and other transactional expenses that we bear. High portfolio turnover may result in an increase in our recognition of net short-term capital gains, which, when distributed to shareholders, will be taxable as ordinary income for federal income tax purposes, and net capital gains, which will be distributed as capital gain dividends to shareholders. In addition, high portfolio turnover may increase our current and accumulated earnings and profits, resulting in a greater portion of our distributions being treated as taxable dividends for federal income tax purposes. See "Certain Federal Income Tax Matters."

#### Material Conflicts of Interest
Conflicts of interest may arise from the fact that the Adviser and its affiliates carry on substantial investment activities for other clients, in which we have no interest, some of which may have investment strategies similar to ours. The portfolio managers of our Adviser must allocate time and investment ideas across multiple accounts. Trades may be executed for some accounts that may adversely impact the value of securities held by other accounts. In addition, conflicts of interest may arise from the fact that a related person of our Adviser has an interest in a client organized as a limited liability company, similar to a general partner interest in a partnership, for which the Adviser also serves as manager. The Adviser or its affiliates may have financial incentives to favor certain of such accounts over us. For example, our Adviser may have an incentive to allocate potentially more favorable investment opportunities to other funds and clients that pay our Adviser an incentive or performance fee. Performance and incentive fees also create the incentive to allocate potentially riskier, but potentially better performing, investments to such funds and other clients to increase the incentive fee. Our Adviser also may have an incentive to make investments in one fund, having the effect of increasing the value of a security in the same issuer held by another fund or client, which, in turn, may result in an incentive fee being paid to our Adviser by that other fund or client. Certain of the Adviser's client accounts may invest in the equity securities of a particular company, while other client accounts may invest in the debt securities of the same company. Any of the Adviser's or its affiliates' proprietary accounts and other customer accounts may compete with us for specific trades. The Adviser or its affiliates may give advice and recommend securities to, or buy or sell securities for, us, which advice or securities may differ from advice given to, or securities recommended or bought or sold for, other accounts and customers, even though their investment objectives may be the same as, or similar to, our objectives. Our Adviser has written allocation policies and procedures designed to address potential conflicts of interest. For instance, when two or more clients advised by the Adviser or its affiliates seek to purchase or sell the same publicly traded securities, the securities purchased or sold will be allocated among the clients on a good faith, fair and equitable basis by the Adviser in its discretion and in accordance with the client's various investment objectives and the Adviser's procedures. In some cases, this system may adversely affect the price or size of the position we may obtain or sell. In other cases, our ability to participate in volume transactions may produce better execution for us. When possible, our Adviser combines all the trade orders into one or more block orders, and each account participates at the average unit or share price obtained in a block order. When block orders are only partially filled, our Adviser considers a number of factors in determining how allocations are made, with the overall goal to allocate in a manner so that accounts are not preferred or disadvantaged over time. Our Adviser also has allocation policies for transactions involving private placement securities, which are designed to result in a fair and equitable participation in offerings or sales for each participating client.

The Adviser also serves as investment adviser for other registered management investment companies, all of which invest in the energy sector. See "Management of the Company — Investment Adviser and Portfolio Managers."

The Adviser will evaluate a variety of factors in determining whether a particular investment opportunity or strategy is appropriate and feasible for the relevant account at a particular time, including, but not limited to, the following: (1) the nature of the investment opportunity taken in the context of the other investments at the time; (2) the liquidity of the investment relative to the needs of the particular entity or account; (3) the availability of the opportunity (i.e., size of obtainable position); (4) the transaction costs involved; and (5) the investment or regulatory limitations applicable to the particular entity or account. Because these considerations may differ when applied to us and relevant accounts under management in the context of any particular investment opportunity, our investment

activities, on the one hand, and other managed accounts, on the other hand, may differ considerably from time to time. In addition, our fees and expenses will differ from those of the other managed accounts. Accordingly, investors should be aware that our future performance and future performance of other accounts of the Adviser may vary.

From time to time, our Adviser may seed proprietary accounts for the purpose of evaluating a new investment strategy that eventually may be available to clients through one or more product structures. Such accounts also may serve the purpose of establishing a performance record for the strategy. Our Adviser's management of accounts with proprietary interests and nonproprietary client accounts may create an incentive to favor the proprietary accounts in the allocation of investment opportunities, and the timing and aggregation of investments. Our Adviser's proprietary seed accounts may include long-short strategies, and certain client strategies may permit short sales. A conflict of interest arises if a security is sold short at the same time as a long position, and continuously short selling in a security may adversely affect the stock price of the same security held long in client accounts. Our Adviser has adopted various policies to mitigate these conflicts, including policies that require our Adviser to avoid favoring any account, and that prohibit client and proprietary accounts from engaging in short sales with respect to individual stocks held long in client accounts. Our Adviser's policies also require transactions in proprietary accounts to be placed after client transactions.

Situations may occur when we could be disadvantaged because of the investment activities conducted by the Adviser and its affiliates for their other funds or accounts. Such situations may be based on, among other things, the following: (1) legal or internal restrictions on the combined size of positions that may be taken for us or the other accounts, thereby limiting the size of our position; (2) the difficulty of liquidating an investment for us or the other accounts where the market cannot absorb the sale of the combined position; or (3) limits on co-investing in negotiated transactions under the 1940 Act, as discussed further below.

The 1940 Act limits our ability to co-invest in negotiated private placements of securities with our affiliates, including other funds managed by the Adviser. We and our Adviser have received exemptive relief from the SEC that permits certain co-investment transactions. In this regard, our Adviser has the ability to allocate investment opportunities of certain negotiated transactions between us, other funds registered under the 1940 Act and other accounts managed by our Adviser pro rata based on available capital, up to the amount proposed to be invested by each. All accounts generally are required to participate on the same terms. Pursuant to the exemptive order, our Adviser will be required to provide the board of directors of each participating registered fund with certain information concerning the relevant investment. A majority (as defined in section 57(o) of the 1940 Act) of the directors eligible to consider the co-investment transaction of each participating registered fund must approve such registered fund's participation in the co-investment transaction.

To the extent we are precluded from co-investing, our Adviser will allocate private investment opportunities among its clients, including but not limited to us and our affiliated companies, based on allocation policies that take into account several suitability factors, including the size of the investment opportunity, the amount each client has available for investment and the client's investment objectives. These allocation policies may result in the allocation of investment opportunities to an affiliated company rather than to us.

To the extent that the Adviser sources and structures private investments in energy infrastructure entities, certain employees of the Adviser may become aware of actions planned by such entities, such as acquisitions, that may not be announced to the public. It is possible that we could be precluded from investing in or selling securities of an energy infrastructure entity about which the Adviser has material, non-public information; however, it is the Adviser's intention to ensure that any material, non-public information available to certain employees of the Adviser is not shared with the employees responsible for the purchase and sale of publicly traded energy infrastructure securities. Our investment opportunities also may be limited by affiliations of the Adviser or its affiliates with energy infrastructure companies.

The Adviser and its principals, officers, employees, and affiliates may buy and sell securities or other investments for their own accounts and may have actual or potential conflicts of interest with respect to investments made on our behalf. As a result of differing trading and investment strategies or constraints, positions may be taken by principals, officers, employees, and affiliates of the Adviser that are the same as, different from, or made at a different time than positions taken for us. Further, the Adviser may, at some time in the future, manage additional investment funds with the same investment objective as ours.

The use of leverage creates an opportunity for increased income and capital appreciation for common stockholders, but at the same time creates special risks that may adversely affect common stockholders. Because our management fee is based upon a percentage of our Managed Assets (as defined below), our management fee is higher when we are leveraged. Therefore, our Adviser has a financial incentive to use leverage, which will create a conflict of interest between our Adviser and our common stockholders, who will bear the costs of our leverage.

#### Leverage

#### Use of Leverage
We currently engage in leverage and may borrow money or issue additional debt securities, and/or issue additional preferred stock, to provide us with additional funds to invest. The borrowing of money and the issuance of preferred stock and debt securities represents the leveraging of our common stock. The issuance of additional Common Shares may enable us to increase the aggregate amount of our leverage or to maintain existing leverage. We reserve the right at any time to use financial leverage to the extent permitted by the 1940 Act (50% of total assets for preferred stock and 33 1/3% of total assets for debt securities) or we may elect to reduce the use of leverage or use no leverage at all. Our policy is to utilize leverage in an amount that on average represents approximately 25% of our total assets. We consider market conditions at the time leverage is incurred and monitor for asset coverage ratios relative to 1940 Act requirements and our financial covenants on an ongoing basis. Leverage as a percent of total assets will vary depending on market conditions but will normally range between 20% and 30%. We generally will not use leverage unless we believe that leverage will serve the best interests of our stockholders. The principal factor used in making this determination is whether the potential return is likely to exceed the cost of leverage. We will not issue additional leverage where the estimated costs of issuing such leverage and the ongoing cost of servicing the payment obligations on such leverage exceed the estimated return on the proceeds of such leverage. We note, however, that in making the determination of whether to issue leverage, we must rely on estimates of leverage costs and expected returns. Actual costs of leverage vary over time depending on interest rates and other factors. Actual returns vary, of course, depending on many factors. Additionally, the percentage of our assets attributable to leverage may vary significantly during periods of extreme market volatility and will increase during periods of declining market prices of our portfolio holdings. Our Board also will consider other factors, including whether the current investment opportunities will help us achieve our investment objective and strategies.

We also may borrow up to an additional 5% of our total assets (not including the amount so borrowed) for temporary purposes, including the settlement and clearance of securities transactions, which otherwise might require untimely dispositions of portfolio holdings.

Under the 1940 Act, we are not permitted to issue preferred stock unless immediately after such issuance, the value of our total assets (including the proceeds of such issuance) less all liabilities and indebtedness not represented by senior securities is at least equal to 200% of the total of the aggregate amount of senior securities representing indebtedness plus the aggregate liquidation value of the outstanding preferred stock. Stated another way, we may not issue preferred stock that, together with outstanding preferred stock and debt securities, has a total aggregate liquidation value and outstanding principal amount of more than 50% of the value of our total assets, including the proceeds of such issuance, less liabilities and indebtedness not represented by senior securities. In addition, we are not permitted to declare any distribution on our common stock, or purchase any of our Common Shares (through tender offers or otherwise) unless we would satisfy this 200% asset coverage requirement test after deducting the amount of such distribution or share price, as the case may be. We may, as a result of market conditions or otherwise, be required to purchase or redeem preferred stock, or sell a portion of our investments when it may be disadvantageous to do so, in order to maintain the required asset coverage. Common stockholders would bear the costs of issuing additional preferred stock, which may include offering expenses and the ongoing payment of distributions. Under the 1940 Act, we may only issue one class of preferred stock.

Under the 1940 Act, we are not permitted to issue debt securities or incur other indebtedness constituting senior securities unless immediately thereafter, the value of our total assets (including the proceeds of the indebtedness) less all liabilities and indebtedness not represented by senior securities is at least equal to 300% of the amount of the outstanding indebtedness. Stated another way, we may not issue debt securities or incur other indebtedness with an aggregate principal amount of more than 33 1/3% of the value of our total assets, including the amount borrowed, less all liabilities and indebtedness not represented by senior securities. We also must maintain this 300% "asset coverage" for as long as the indebtedness is outstanding. The 1940 Act provides that we may not declare any distribution on any class of shares of our stock, or purchase any of our shares of stock (through tender offers or otherwise), unless we would satisfy this 300% asset coverage requirement test after deducting the amount of the distribution or share purchase price, as the case may be except that dividends may be declared upon any preferred stock if such senior security representing indebtedness has an asset coverage of at least 200% at the time of declaration thereof after deducting the amount of such distribution. If the asset coverage for indebtedness declines to less than 300% as a result of market fluctuations or otherwise, we may be required to redeem debt securities or sell a portion of our investments when it may be disadvantageous to do so. Under the 1940 Act, we may only issue one class of senior securities representing indebtedness.

#### Hedging Transactions
In an attempt to reduce the interest rate risk arising from our leveraged capital structure, we may use interest rate transactions such as swaps, caps and floors. There is no assurance that the interest rate hedging transactions into which we enter will be effective in reducing our exposure to interest rate risk. Hedging transactions are subject to correlation risk, which is the risk that payment on our hedging transactions may not correlate exactly with our payment obligations on senior securities. The use of interest rate transactions is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio security transactions. In an interest rate swap, we would agree to pay to the other party to the interest rate swap (which is known as the "counterparty") a fixed rate payment in exchange for the counterparty agreeing to pay to us a variable rate payment intended to approximate our variable rate payment obligations on outstanding leverage. The payment obligations would be based on the notional amount of the swap. In an interest rate cap, we would pay a premium to the counterparty up to the interest rate cap and, to the extent that a specified variable rate index exceeds a predetermined fixed rate of interest, would receive from the counterparty payments equal to the difference based on the notional amount of such cap. In an interest rate floor, we would be entitled to receive, to the extent that a specified index falls below a predetermined interest rate, payments of interest on a notional principal amount from the party selling the interest rate floor. Depending on the state of interest rates in general, our use of interest rate transactions could affect our ability to make required interest or distribution payments on our outstanding leverage. To the extent there is a decline in interest rates, the value of the interest rate transactions could decline. If the counterparty to an interest rate transaction defaults, we would not be able to use the anticipated net receipts under the interest rate transaction to offset our cost of financial leverage. We intend to enter into transactions only with counterparties that meet certain standards of creditworthiness set by our Adviser and to continually monitor the creditworthiness of any counterparties.

We may, but are not obligated to, enter into interest rate swap transactions intended to reduce our interest rate risk with respect to our interest and distribution payment obligations under our outstanding leverage. See "Risk Factors — Risks Related to Our Investments — Hedging Strategy Risk."

#### Effects of Leverage
Assuming that the distribution rates payable on the Outstanding MRP Shares (as defined below) and the interest rates payable on the debt securities and unsecured revolving credit facilities remain as described in our Annual Report to Stockholders (an average annual cost of 3.36% based on the amount of leverage outstanding at November 30, 2025), the annual return that our portfolio must experience net of expenses, but excluding deferred and current taxes, in order to cover leverage costs would be 1.94%.

The following table is designed to illustrate the effect of the foregoing level of leverage on the return to a common stockholder, assuming hypothetical annual returns (net of expenses) of our portfolio of -10% to 10%. As the table shows, the leverage generally increases the return to common stockholders when portfolio return is positive or greater than the cost of leverage and decreases the return when the portfolio return is negative or less than the cost of leverage. The figures appearing in the table are hypothetical, and actual returns may be greater or less than those appearing in the table.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  Assumed Portfolio Return (net of expenses) | (10)% | (5)% | 0% | 5% | 10% |
|  Corresponding Common Share Return | (14.84)% | (7.92)% | (1.01)% | 5.91% | 12.82% |

---

Because we use leverage, the amount of the fees paid to the Adviser for investment advisory and management services are higher than if we did not use leverage because the fees paid are calculated based on our Managed Assets, which include any assets attributable to leverage that may be outstanding. Therefore, the Adviser has a financial incentive to use leverage, which creates a conflict of interest between the Adviser and our common stockholders. Only our common stockholders bear management fees and other expenses we incur, including the costs of leverage.

We cannot fully achieve the benefits of leverage until we have invested the proceeds resulting from the use of leverage in accordance with our investment objective and policies. For further information about leverage, see "Risk Factors — Risks Related to Leverage — Leverage Risk."

#### Risk Factors
*Investing in any of our securities involves risk, including the risk that* you *may receive little or no return on your investment or even that you may lose part or all of your investment. Therefore, before investing in any of our securities you should consider carefully the following risks, as well as any risk factors included in the applicable Prospectus Supplement.*

#### Risks Related to Our Investments
*General.&nbsp;&nbsp;&nbsp;&nbsp;*We are a non-diversified, closed-end management investment company designed primarily as a long-term investment vehicle and not as a trading tool. An investment in our securities should not constitute a complete investment program for any investor and involves a high degree of risk. Due to the uncertainty in all investments, there can be no assurance that we will achieve our investment objective.

The following are the general risks of investing in our securities that affect our ability to achieve our investment objective. The risks below could lower the returns and distributions on common stock and reduce the amount of cash and net assets available to make distribution payments on preferred stock and interest payments on debt securities.

*Capital Markets Volatility Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Our capital structure and performance may be adversely impacted by weakness in the credit markets and stock market if such weakness results in declines in the value of energy infrastructure entities in which we invest. If the value of our investments declines or remains volatile, there is a risk that we may be required to reduce outstanding leverage, which could adversely affect our stock price and ability to pay distributions at historical levels. A sustained economic slowdown may adversely affect the ability of energy infrastructure entities to sustain their historical distribution levels, which in turn, may adversely affect our ability to sustain distributions at historical levels. Energy infrastructure entities that have historically relied heavily on outside capital to fund their growth may be impacted by a slowdown in the capital markets. The performance of the energy infrastructure sector is dependent on several factors including the condition of the financial sector, the general economy and the commodity markets.

*Concentration Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Under normal circumstances, we concentrate our investments in the energy infrastructure sector. Risks inherent in the energy infrastructure business include the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unregulated power, processing and coal entities may be directly affected by energy commodity prices. The volatility of commodity prices can indirectly affect certain other energy entities due to the impact of prices on volume of commodities transported, processed, stored or distributed. Pipeline and regulated power entities are generally not subject to direct commodity price exposure because they do not own the underlying energy commodity. While propane entities do own the underlying energy commodity, the Adviser seeks high quality midstream and power entities that are able to mitigate or manage direct margin exposure to commodity price levels. The energy and power infrastructure sector can be hurt by market perception that the entities' performance and distributions are directly tied to commodity prices.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The profitability of energy and power infrastructure entities, particularly processing and pipeline entities, may be materially impacted by the volume of energy commodities available for transporting, processing, storing, producing or distributing. A significant decrease in the demand for or production of energy commodities, due to economic factors, import supply disruption, depressed commodity prices or otherwise, would reduce revenue and operating income of energy and power infrastructure entities and, therefore, the ability of the entities to generate attractive returns.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A portion of any one midstream entity's assets may be dedicated to natural gas reserves and other commodities that naturally deplete over time, which could have a materially adverse impact on an entity's ability to make distributions. Often midstream energy entities depend upon exploration and development activities by third parties.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Energy and power infrastructure entities employ a variety of means of increasing cash flow, including increasing utilization of existing facilities, expanding operations through new construction, expanding operations through acquisitions, or securing additional long-term contracts. Thus, some entities may be subject to construction risk, acquisition risk or other risk factors arising from their specific business strategies.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The profitability of energy and power infrastructure entities could be adversely affected by changes in the regulatory environment. Most energy entities' assets are heavily regulated by federal and state governments in diverse matters, such as the way in which certain assets are constructed, maintained and operated and the prices such entities may charge for their services. Such regulation can change over time in scope and intensity. For example, a particular byproduct of a midstream energy process may be declared hazardous by a regulatory agency and unexpectedly increase production costs. Moreover, many state and federal environmental laws provide for civil as well as regulatory remediation, thus adding to the potential exposure energy entities may face.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Energy and power infrastructure company activities are subject to stringent environmental laws and regulation by many federal, state and local authorities, international treaties and foreign governmental authorities. Failure to comply with such laws and regulations or to obtain any necessary environmental permits pursuant to such laws and regulations could result in fines or other sanctions. Congress and other domestic and foreign governmental authorities have either considered or implemented various laws and regulations to restrict or tax certain emissions, particularly those involving air and water emissions. Existing environmental regulations could be revised or reinterpreted, new laws and regulations could be adopted or become applicable, and future changes in environmental laws and regulations could occur, which could impose significant additional costs. Energy and power infrastructure companies have made and will likely continue to make significant capital and other expenditures to comply with these and other environmental laws and regulations. There can be no assurance that such companies would be able to recover all or any increased environmental costs from their customers or that their business, financial condition or results of operations would not be materially and adversely affected by such expenditures or any changes in domestic or foreign environmental laws and regulations, in which case the value of these companies' securities could be adversely affected. In addition, energy companies may be responsible for environmentally-related liabilities, including any on-site liabilities associated with the environmental condition of facilities that it has acquired, leased or developed, or liabilities from associated activities, regardless of when the liabilities arose and whether they are known or unknown.

Increased regulatory scrutiny of hydraulic fracturing could result in additional laws and regulations or, potentially, prohibition of the practice. Hydraulic fracturing is a common practice used by energy companies to stimulate production of natural gas and/or crude oil from unconventional reservoirs. The process involves the injection of water, sand, and additives under pressure into a targeted subsurface formation. The water and pressure create fractures in the rock formations, which are held open by the grains of sand, enabling the crude oil or natural gas to flow to the wellbore. Increased regulatory scrutiny of disposal wastewater, which is a byproduct of hydraulic fracturing and production of unconventional reserves and must be disposed, could result in additional laws or regulations governing such disposal activities.

While we are not able to predict the likelihood of such an event or its impact, it is possible that additional restrictions on hydraulic fracturing or wastewater disposal could result in a reduction in production of crude oil, natural gas and natural gas liquids. The use of hydraulic fracturing is critical to the recovery of economic amounts of crude oil, natural gas and natural gas liquids from unconventional reserves, and the associated wastewater must be disposed. Midstream energy entities have increasingly focused on the construction of midstream assets to facilitate the development of unconventional reservoirs. As a result, restrictions on hydraulic fracturing or wastewater disposal could have an adverse impact on the financial performance of midstream energy entities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Natural risks, such as earthquakes, floods, lightning, hurricanes, tsunamis, tornadoes and wind, are inherent risks in energy infrastructure company operations. For example, extreme weather patterns, such as Hurricane Ivan in 2004 and Hurricanes Katrina and Rita in 2005, the Tohuku earthquake and resulting tsunami in Japan in 2011, Hurricane Sandy in 2012 and Hurricane Harvey in 2017, or the threat thereof, could result in substantial damage to the facilities of certain companies located in the affected areas and significant volatility in the supply of energy and could adversely impact the prices of the securities in which we invest. This volatility may create fluctuations in commodity prices and earnings of companies in the energy and power infrastructure industry.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A rising interest rate environment could adversely impact the performance of energy and power infra entities. Rising interest rates could limit the capital appreciation of equity units of these entities as a result of the increased availability of alternative investments at competitive yields. Rising interest rates also may increase an entity's cost of capital. A higher cost of capital could limit growth from acquisition/expansion projects and limit cash flow growth rates.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Since the September 11, 2001 attacks, the U.S. Government has issued public warnings indicating that energy assets, specifically those related to pipeline and power infrastructure, production facilities and transmission and distribution facilities, might be specific targets of terrorist activity. The continued threat of terrorism and related military activity likely will increase volatility for prices in energy commodities and could affect the market for products of energy entities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Holders of MLP units are subject to certain risks inherent in the partnership structure of MLPs including (1) tax risks (described below), (2) limited ability to elect or remove management, (3) limited voting rights, except with respect to extraordinary transactions, and (4) conflicts of interest of the general partner, including those arising from incentive distribution payments.

*Industry Specific Risk*.&nbsp;&nbsp;&nbsp;&nbsp;Energy infrastructure companies also are subject to risks specific to the industry they serve.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pipeline entities are subject to demand for crude oil or refined products in the markets served by the pipeline, sharp decreases in crude oil or natural gas prices that cause producers to curtail production or reduce capital spending for exploration activities, and environmental regulation. Demand for gasoline, which accounts for a substantial portion of refined product transportation, depends on price, prevailing economic conditions in the markets served, and demographic and seasonal factors. Pipeline entities are subject to regulation by FERC with respect to tariff rates these companies may charge for pipeline transportation services. An adverse determination by FERC with respect to the tariff rates of a pipeline entity could have a material adverse effect on the business, financial condition, results of operations and cash flows of that pipeline entity and its ability to make cash distributions to its equity owners.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Power and utility companies are heavily regulated by U.S. federal, state and local government regulations and policies concerning the electric utility industry, as well as policies promulgated by electric utilities. Power and utility companies a subject to risks including difficulty in obtaining an adequate return on invested capital, difficulty in financing large construction programs, restrictions on operations and increased cost and delays attributable to environmental considerations and regulation, the effects of a national energy policy and lengthy delays and greatly increased costs and other problems associated with the design, construction, licensing, regulation and operation of nuclear facilities for electric generation, In many regions of United States, the Utility Industry is experiencing increasing competitive pressures, primarily in wholesale markets, as a result of consumer demand, technological advances, greater availability of natural gas with respect to electric utility companies and other factors.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Gathering and processing entities are subject to declines in production of natural gas fields, which utilize the processing facilities as a way to market the gas, prolonged depression in the price of natural gas or crude oil refining, which curtails production due to lack of drilling activity and declines in the prices of natural gas liquids products and natural gas prices, resulting in lower processing margins.

*MLP Risk.&nbsp;&nbsp;&nbsp;&nbsp;*An investment in MLP securities involves some risks that differ from the risks involved in an investment in the common stock of a corporation, including governance risk, tax risk, and cash flow risk. Governance risk involves the risks associated with the ownership structure of MLPs. MLPs are also subject to tax risk, which is the risk that MLPs might lose their partnership status for tax purposes or might otherwise be subject to federal income tax at the entity level as a result of an audit of a previously filed tax return. Cash flow risk is the risk that MLPs will not make distributions to holders (including us) at anticipated levels or that such distributions will not have the expected tax character. As a result, there could be a material reduction in our cash flow and there could be a material decrease in the value of our Common Shares.

*Equity Securities Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Equity securities can be affected by macro-economic and other factors affecting the stock market in general, expectations of interest rates, investor sentiment towards the energy and power sector, changes in a particular issuer's financial condition, or unfavorable or unanticipated poor performance of a particular issuer.

*Smaller Company Securities Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Investing in securities of smaller companies may involve greater risk than is associated with investing in more established companies. Companies with smaller capitalization may have limited product lines, markets or financial resources; may lack management depth or experience; and may be more vulnerable to adverse general market or economic developments than larger more established companies.

*Hedging Strategy Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We may use interest rate transactions for hedging purposes only, in an attempt to reduce the interest rate risk arising from our leveraged capital structure. There is no assurance that the interest rate hedging transactions into which we enter will be effective in reducing our exposure to interest rate risk. Hedging transactions are subject to correlation risk, which is the risk that payment on our hedging transactions may not correlate exactly with our payment obligations on senior securities.

Interest rate transactions that we may use for hedging purposes will expose us to certain risks that differ from the risks associated with our portfolio holdings. There are economic costs of hedging reflected in the price of interest rate swaps, floors, caps and similar techniques, the costs of which can be significant, particularly when long-term interest rates are substantially above short-term rates. In addition, our success in using hedging instruments is subject to the Adviser's ability to predict correctly changes in the relationships of such hedging instruments to our leverage risk, and there can be no assurance that the Adviser's judgment in this respect will be accurate. Consequently, the use of hedging transactions might result in a poorer overall performance, whether or not adjusted for risk, than if we had not engaged in such transactions.

Depending on the state of interest rates in general, our use of interest rate transactions could enhance or decrease the cash available to us for payment of distributions or interest. To the extent there is a decline in interest rates, the value of interest rate swaps or caps could decline, and result in a decline in our net assets. In addition, if the counterparty to an interest rate transaction defaults, we would not be able to use the anticipated net receipts under the interest rate swap or cap to offset our cost of financial leverage.

*Competition Risk.&nbsp;&nbsp;&nbsp;&nbsp;*At the time we completed our initial public offering in February 2004, we were the only publicly traded investment company offering access to a portfolio of energy infrastructure MLPs. Since that time several alternatives to us as vehicles for investment in a portfolio of energy infrastructure MLPs and midstream entities, including other publicly traded investment companies and private funds, have emerged. These competitive conditions may adversely impact our ability to meet our investment objective, which in turn could adversely impact our ability to make interest or distribution payments.

*Restricted Security Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We may invest up to 30% of total assets in restricted securities, primarily through direct placements. Restricted securities are less liquid than securities traded in the open market because of statutory and contractual restrictions on resale. Such securities are, therefore, unlike securities that are traded in the open market, which can be expected to be sold immediately if the market is adequate. As discussed further below, this lack of liquidity creates special risks for us. However, we could sell such securities in privately negotiated transactions with a limited number of purchasers or in public offerings under 1933 Act.

Restricted securities are subject to statutory and contractual restrictions on their public resale, which may make it more difficult to value them, may limit our ability to dispose of them and may lower the amount we could realize upon their sale. To enable us to sell our holdings of a restricted security not registered under the 1933 Act, we may have to cause those securities to be registered. The expenses of registering restricted securities may be negotiated by us with the issuer at the time we buy the securities. When we must arrange registration because we wish to sell the security, a considerable period may elapse between the time the decision is made to sell the security and the time the security is registered so that we could sell it. We would bear the risks of any downward price fluctuation during that period.

*Liquidity Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Although common units of MLPs and other midstream entities trade on the NYSE, NYSE MKT LLC (formerly known as AMEX), and the Nasdaq National Market, certain securities may trade less frequently than those of larger companies due to their smaller capitalizations. In the event certain securities experience limited trading volumes, the prices of such entities may display abrupt or erratic movements at times. Additionally, it may be more difficult for us to buy and sell significant amounts of such securities without an unfavorable impact on prevailing market prices. As a result, these securities may be difficult to dispose of at a fair price at the times when we believe it is desirable to do so. Investment of our capital in securities that are less actively traded or over time experience decreased trading volume may restrict our ability to take advantage of other market opportunities or to dispose of securities. Our clean-energy related private equity investments will be highly illiquid, and we will likely be able to sell such securities only in privately negotiated transactions with another investor or group of investors. Depending on prevailing market conditions, there can be no assurance that we will be able to sell such investments on favorable terms, if at all. This also may affect adversely our ability to make required interest payments on the debt securities and distributions on the preferred stock, to redeem such securities, or to meet asset coverage requirements.

*Covered Call Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We cannot guarantee that our covered call option strategy will be effective. There are several risks associated with transactions in options on securities, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;There are significant differences between the securities and options markets that could result in an imperfect correlation between these markets, causing a given covered call option transaction not to achieve its objectives. A decision as to whether, when and how to use covered calls (or other options) involves the exercise of skill and judgment, and even a well-conceived transaction may be unsuccessful because of market behavior or unexpected events.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The use of options may require us to sell portfolio securities at inopportune times or for prices other than current market values, may limit the amount of appreciation we can realize on an investment, or may cause us to hold a security we might otherwise sell. As the writer of a covered call option, we forego, during the option's life, the opportunity to profit from increases in the market value of the security covering the call option above the exercise price of the call option but retain the risk of loss should the price of the underlying security decline. Although such loss would be offset in part by the option premium received, in a situation in which the price of a particular stock on which we have written a covered call option declines rapidly and materially or in which prices in general on all or a substantial portion of the stocks on which we have written covered call options decline rapidly and materially, we could sustain material depreciation or loss to the extent we do not sell the underlying securities (which may require us to terminate, offset or otherwise cover our option position as well).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;There can be no assurance that a liquid market will exist when we seek to close out an option position. If we were unable to close out a covered call option that we had written on a security, we would not be able to sell the underlying security unless the option expired without exercise. Reasons for the absence of a liquid secondary market for exchange-traded options may include, but are not limited to, the following: (i) there may be insufficient trading interest; (ii) restrictions may be imposed by an exchange on opening transactions or closing transactions or both; (iii) trading halts, suspensions or other restrictions may be imposed with respect to particular classes or series of options; (iv) unusual or unforeseen circumstances may interrupt normal operations on an exchange; (v) the trading facilities may not be adequate to handle current trading volume; or (vi) the relevant exchange could discontinue the trading of options. In addition, our ability to terminate over-the-counter options may be more limited than with exchange-traded options and may involve the risk that counterparties participating in such transactions will not fulfill their obligations.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The principal factors affecting the market value of an option include supply and demand, interest rates, the current market price of the underlying security in relation to the exercise price of the option, the dividend or distribution yield of the underlying security, the actual or perceived volatility of the underlying security and the time remaining until the expiration date. Any of the foregoing could impact or cause to vary over time the amount of income we are able to generate through our covered call option strategy.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The number of covered call options we can write is limited by the number of shares of the corresponding common stock we hold. Furthermore, our covered call option transactions may be subject to limitations established by each of the exchanges, boards of trade or other trading facilities on which such options are traded.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If we fail to maintain any required asset coverage ratios in connection with any use by us of leverage, we may be required to redeem or prepay some or all of our leverage instruments. Such redemption or prepayment would likely result in our seeking to terminate early all or a portion of any option transaction. Early termination of an option could result in a termination payment by or to us.

*Non*-diversification *Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We are a non-diversified, closed-end management investment company under the 1940 Act that intends to be treated as a RIC under the Code. Accordingly, there are no regulatory limits under the 1940 Act, but are limitations under the Code, on the number and size of securities that we hold. We may invest more assets in fewer issuers as compared to a diversified fund.

*Debt Securities Risk:&nbsp;&nbsp;&nbsp;&nbsp;*Investments in debt securities are generally subject to credit risk, extension risk, interest rate risk, prepayment risk and spread risk:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<u>Credit Risk</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*Credit risk is the risk that the market value of debt securities may decline if the issuer or the borrower, or a guarantor, defaults or otherwise becomes unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations, such as making timely payments of principal or interest. We could lose money if the issuer of or borrower under, or a guarantor of, a debt security defaults or is unable or unwilling to make timely principal or interest payments. The lower quality or unrated securities in which we invest may present increased credit risk as compared to higher rated securities, including the possibility of default or bankruptcy.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<u>Extension Risk</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*During periods of rising market interest rates, it becomes more expensive for a borrower to refinance its existing debt obligations. During such periods, repayments of debt securities may occur more slowly than anticipated by the market because the issuer or borrower will prefer to pay interest at a lower rate. This may cause the market prices of such debt securities to decline.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<u>Interest Rate Risk</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*Generally, when market interest rates rise, the values of debt securities decline, and vice versa. Our investment in such securities means that the NAV and market price of our Common Shares will tend to decline if market interest rates rise. During periods of declining interest rates, the issuer of a security may exercise its option to prepay principal earlier than scheduled, forcing us to reinvest in lower yielding securities. This is known as call or prepayment risk. Lower grade securities frequently have call features that allow the issuer to repurchase the security prior to its stated maturity. An issuer may redeem a lower grade obligation if the issuer can refinance the debt at a lower cost due to declining interest rates or an improvement in the credit standing of the issuer. Debt securities with longer maturities tend to be more sensitive to changes in market interest rates, typically making their prices more volatile than securities with shorter maturities. The Federal Reserve recently raised the federal funds rate several times and has indicated that it may continue to do so. Therefore, there is a risk that interest rates will rise, which will likely drive down bond prices.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*<u>Prepayment, Call or Reinvestment Risk</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*Many issuers and borrowers have a right to prepay their debt securities prior to the stated maturity date. If market interest rates fall, an issuer or borrower may exercise this right to refinance its debt obligations at a lower rate. In that event, a holder of the issuer's or borrower's debt securities will not benefit from the rise in market price that normally accompanies a decline in market interest rates. Reinvestment risk is the risk that, upon the sale or repayment (at maturity or otherwise) of debt securities we hold, we will be required to reinvest the proceeds in debt securities paying lower interest rates than the debt securities that were sold or repaid. In this event, our distribution rate may decline. A decline in the income we receive from our investments is likely to have a negative effect on our market price, net asset value and/or overall return.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>Spread Risk</u>*.*&nbsp;&nbsp;&nbsp;&nbsp;*Wider credit spreads and decreasing market values typically represent a deterioration of a debt security's credit soundness and a perceived greater likelihood or risk of default by the issuer.

*Below Investment Grade Securities Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Investing in below investment grade debt instruments (commonly referred to as "junk bonds") involves additional risks than investment grade securities. Adverse changes in economic conditions are more likely to lead to a weakened capacity of a below investment grade issuer to make principal payments and interest payments than an investment grade issuer. An economic downturn could adversely affect the ability of highly leveraged issuers to service their obligations or to repay their obligations upon maturity. Similarly, downturns in profitability in the energy infrastructure industry could adversely affect the ability of below investment grade issuers in that industry to meet their obligations. The market values of lower quality securities tend to reflect individual developments of the issuer to a greater extent than do higher quality securities, which react primarily to fluctuations in the general level of interest rates.

The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities. There are fewer dealers in the market for below investment grade securities than investment grade obligations. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger than for higher quality instruments. Under adverse market or economic conditions, the secondary market for below investment grade securities could contract further, independent of any specific adverse change in the condition of a particular issuer, and these instruments may become illiquid. As a result, it may be more difficult to sell these securities, or we may be able to sell the securities only at prices lower than if such securities were widely traded. This may affect adversely our ability to make required distribution or interest payments on our outstanding senior securities. Prices realized upon the sale of such lower-rated or unrated securities, under these circumstances, may be less than the prices used in calculating our NAV.

Because investors generally perceive that there are greater risks associated with lower quality securities of the type in which we may invest a portion of our assets, the yields and prices of such securities may tend to fluctuate more than those for higher rated securities. In the lower quality segments of the debt securities market, changes in perceptions of issuers' creditworthiness tend to occur more frequently and in a more pronounced manner than do changes in higher quality segments of the debt securities market, resulting in greater yield and price volatility.

Factors having an adverse impact on the market value of below investment grade securities may have an adverse effect on our NAV and the market value of our Common Shares. In addition, we may incur additional expenses to the extent we are required to seek recovery upon a default in payment of principal or interest on our portfolio holdings. In certain circumstances, we may be required to foreclose on an issuer's assets and take possession of its property or operations. In such circumstances, we would incur additional costs in disposing of such assets and potential liabilities from operating any business acquired.

The corporate debt securities in which we invest generally will be high yield debt securities. Because the performance of high yield corporate debt securities, especially during periods of market stress, may be affected by changes, or perceived changes, in the issuer's business, financial condition or prospects, the performance of our investments in high yield corporate debt securities may be correlated with the performance of equity securities, including the equity securities in which we invest. Accordingly, there can be no assurance that the allocation of our assets among equity and debt securities will provide our common stockholders with any of the benefits typically associated with asset class diversification.

*Market Disruption and Geopolitical Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Geopolitical events, such as war (including ongoing conflicts in Ukraine and the Middle East), terrorist attacks, natural or environmental disasters (including hurricanes, wildfires and flooding), country instability, public health emergencies (including epidemics and pandemics), market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers and other governmental trade or market control programs, the potential exit of a country from its respective union and related geopolitical events, have led and may in the future lead to market volatility and may have long-lasting impacts on U.S. and global economies and financial markets. Supply chain disruptions or significant changes in the supply or prices of commodities or other economic inputs may have material and unexpected effects on both global securities markets and individual countries, regions, sectors, companies or industries. Events occurring in one region of the world may negatively impact industries and regions that are not otherwise directly impacted by the events. Additionally, those events, as well as other changes in foreign and domestic political and economic conditions, could adversely affect individual issuers or related groups of issuers, securities markets, interest rates, secondary trading, credit ratings, inflation, investor sentiment and other factors affecting the value of the Company's investments.

Russia's military invasion of Ukraine significantly amplified already existing geopolitical tensions. The United States and many other countries have instituted various economic sanctions against Russia, Russian individuals and entities and Belarus. The extent and duration of the military action, sanctions imposed and other punitive actions taken (including any Russian retaliatory responses to such sanctions and actions), and resulting disruptions in Europe and globally cannot be predicted, but could be significant and have a severe adverse effect on the global economy, securities markets and commodities markets globally, including through global supply chain disruptions, increased inflationary pressures and reduced economic activity.

Ongoing conflicts in the Middle East could have similar negative impacts. The possibility of a prolonged conflict and the potential expansion of the conflict in the surrounding areas and the involvement of other nations in such conflict could further destabilize the Middle East region and introduce new uncertainties in global markets, including the oil and natural gas markets.

Systemic risk events in the financial sectors and/or resulting government actions can negatively impact investments held by us. Global financial markets and economic conditions have been, and may continue to be, volatile due to a variety of factors, including significant write-offs in the financial services sector. Despite more stabilized economic activity, if the volatility continues, the cost of raising capital in the debt and equity capital markets, and the ability to raise capital, may be impacted. In particular, concerns about the general stability of financial markets and specifically the solvency of lending counterparties, may impact the cost of raising capital from the credit markets through increased interest rates, tighter lending standards, difficulties in refinancing debt on existing terms or at all and reduced, or in some cases ceasing to provide, funding to borrowers. In addition, lending counterparties under existing revolving credit facilities and other debt instruments may be unwilling or unable to meet their funding obligations. As a result of any of the foregoing, we or the companies in which we invest may be unable to obtain new debt or equity financing on acceptable terms. If funding is not available when needed, or is available only on unfavorable terms, we or the companies in which we invest may not be able to meet obligations as they come due. Moreover, without adequate funding, midstream energy entities may be unable to execute their growth strategies, complete future acquisitions, take advantage of other business opportunities or respond to competitive pressures, any of which could have a material adverse effect on their revenues and results of operations.

The rapid development and increasingly widespread use and regulation of artificial intelligence, including machine learning technology and generative artificial intelligence such as ChatGPT (collectively, "AI Technologies"), may pose risks to us. For instance, the rapid advanced development of AI technologies and efforts to regulate or control its use and advancement may have significant positive or negative impacts on a wide range of different industries and the global economy. It is not possible to predict which companies, sectors, or economies may benefit or be disadvantaged by such developments nor is it possible to determine the full extent of current or future risks related thereto.

Some political leaders around the world (including in the U.S. and certain European nations) have been and may be elected on protectionist platforms, raising questions about the future of global free trade. Global trade disruption, significant introductions of trade barriers and bilateral trade frictions, together with any future downturns in the global economy resulting therefrom, could adversely affect the financial performance of the Company and its investments.

#### Risks Related to Leverage
*Leverage Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Our use of leverage through bank borrowings and the issuance of preferred stock and senior or other transactions involving indebtedness (other than for temporary or emergency purposes) are or would be considered "senior securities" for purposes of the 1940 Act and create risks. Leverage is a speculative technique that may adversely affect common stockholders. If the return on securities acquired with borrowed funds or other leverage proceeds does not exceed the cost of the leverage, the use of leverage could cause us to lose money. Successful use of leverage depends on the Adviser's ability to predict or correctly hedge interest rates and market movements, and there is no assurance that the use of a leveraging strategy will be successful during any period in which it is used. Because the fee paid to the Adviser will be calculated based on Managed Assets, the fees will increase when leverage is utilized, giving the Adviser an incentive to utilize leverage.

Our issuance of senior securities involves offering expenses and other costs, including interest payments, which are borne indirectly by our common stockholders. Fluctuations in interest rates could increase interest or distribution payments on our senior securities and could reduce cash available for distributions on common stock. Increased operating costs, including the financing cost associated with any leverage, may reduce our total return to common stockholders.

The 1940 Act and/or the rating agency guidelines applicable to some senior securities impose asset coverage requirements, distribution limitations, voting right requirements (in the case of the senior equity securities), and restrictions on our portfolio composition and our use of certain investment techniques and strategies. The terms of any senior securities or other borrowings may impose additional requirements, restrictions and limitations that are more stringent than those currently required by the 1940 Act, and the guidelines of the rating agencies that rate outstanding senior securities. These requirements may have an adverse effect on us and may affect our ability to pay distributions on common stock and preferred stock. To the extent necessary, we intend to redeem our senior securities to maintain the required asset coverage. Doing so may require that we liquidate portfolio securities at a time when it would not otherwise be desirable to do so. Nevertheless, it is not anticipated that the 1940 Act requirements, the terms of any senior securities or the rating agency guidelines will impede the Adviser in managing our portfolio in accordance with our investment objective and policies. See "Leverage — Use of Leverage."

#### Risks Related to Our Operations
*Valuation Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Market prices generally will not be available for restricted securities or securities of private companies, and the value of such investments ordinarily will be determined based on fair valuations determined by the Adviser pursuant to procedures adopted pursuant to Rule 2a-5. Similarly, common units acquired through direct placements will be valued based on fair value determinations because of their restricted nature; however, the Adviser expects that such values will be based on a discount from publicly available market prices. Restrictions on resale or the absence of a liquid secondary market may adversely affect our ability to determine our NAV. The sale price of securities that are not readily marketable may be lower or higher than our most recent determination of their fair value. Additionally, the value of these securities typically requires more reliance on the judgment of the Adviser than that required for securities for which there is an active trading market. Due to the difficulty in valuing these securities and the absence of an active trading market for these investments, we may not be able to realize these securities' true value or may have to delay their sale in order to do so. This may affect adversely our ability to make required interest payments on the debt securities and distributions on the preferred stock, to redeem such securities, or to meet asset coverage requirements.

*Market Discount Risk.&nbsp;&nbsp;&nbsp;&nbsp;*Our common stock has traded both at a premium and at a discount in relation to NAV. We cannot predict whether our shares will trade in the future at a premium or discount to NAV. Shares of closed-end investment companies frequently trade at a discount from NAV, but in some cases have traded above NAV. Continued development of alternatives as a vehicle for investment in MLP securities may contribute to reducing or eliminating any premium or may result in our shares trading at a discount. The risk of the Common Shares trading at a discount is a risk separate from the risk of a decline in our NAV because of investment activities. Our NAV will be reduced immediately following an offering of our common or preferred stock, due to the offering costs for such stock, which are borne entirely by us. Although we also bear the offering costs of debt securities, such costs are amortized over time and therefore do not impact our NAV immediately following an offering.

Whether stockholders will realize a gain or loss for federal income tax purposes upon the sale of our Common Shares depends upon whether the market value of the Common Shares at the time of sale is above or below the stockholder's basis in such shares, taking into account transaction costs, and is not directly dependent upon our NAV. Because the market value of our common stock will be determined by factors such as the relative demand for and supply of the shares in the market, general market conditions and other factors beyond our control, we cannot predict whether our Common Shares will trade at, below or above NAV, or at, below or above the public offering price for Common Shares.

*Management Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The skill of our Adviser plays a significant role in our ability to achieve our investment objective. Our ability to achieve our investment objective depends on the ability of the Adviser to identify economic and market trends and to select securities, especially in volatile markets. The Adviser could be incorrect in its analysis of industries, companies, and the relative attractiveness of securities. The Adviser may face competition in retaining and hiring investment professionals.

*Tax Risk.&nbsp;&nbsp;&nbsp;&nbsp;*We elected to be treated as a RIC for our fiscal year ending November 30, 2023, and intend to continue to qualify as a RIC under the Code. To maintain our qualification for federal income tax purposes as a RIC under the Code, we must meet certain source-of-income, asset diversification and annual distribution requirements. Although we intend to continue to qualify as a RIC, certain built-in gains that were present in our portfolio at the time of our conversion to RIC status remain subject to federal income tax at the fund level at regular corporate rates if such built-in gains are recognized within the period specified in the Code. If for any taxable year we fail to qualify for the special federal income tax treatment afforded to RICs and we were ineligible to or otherwise did not cure such failure for the taxable year, we would fail to qualify as a RIC under the Code for such year, in which case all of our taxable income will be subject to federal income tax at regular corporate rates (without any deduction for distributions to our stockholders), our income available for distribution to stockholders will be reduced, and all distributions from earnings and profits will be taxable to our shareholders as ordinary income to the extent of our current or accumulated earnings and profits. See "Certain Federal Income Tax Matters" at page 40.

*Cybersecurity Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The Company's service providers, including the Adviser, must rely in part on digital and network technologies (collectively "cyber networks") to conduct their businesses. Such cyber networks might in some circumstances be at risk of cyberattacks that could potentially seek unauthorized access to digital systems for purposes such as misappropriating sensitive information, corrupting data, or causing operational disruption. Cyberattacks might potentially be carried out by persons using techniques that could range from efforts to electronically circumvent network security or overwhelm websites to intelligence gathering and social engineering functions aimed at obtaining information necessary to gain access. Nevertheless, cyber incidents could potentially occur and might in some circumstances result in unauthorized access to sensitive information about the Adviser or other service providers or their clients, including the Company.

*Subsidiary Risk.&nbsp;&nbsp;&nbsp;&nbsp;*By investing in any subsidiary, we will be indirectly exposed to the risks associated with such subsidiary's investments. The instruments that will be held by any subsidiary will generally be similar to those that are permitted to be held by the Company and will be subject to the same risks that apply to similar investments if held directly by the Company. The subsidiaries will not be registered under the 1940 Act, and, unless otherwise noted in this Prospectus, will not be subject to all the protections of the 1940 Act. However, we will wholly own and control any subsidiary, and we and any subsidiary will each be managed by our Adviser and will share the same portfolio management team. Our Board will have oversight responsibility for the investment activities of the Company, including its investment in the subsidiaries, and our role as sole shareholder of any subsidiary. Changes in the laws of the United States and/or any jurisdiction in which a subsidiary is formed could result in our inability or the inability of the subsidiaries to operate as described in this Prospectus and the Statement of Additional Information and could adversely affect the Company.

#### Risks Related to Offerings
*Market Impact Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The sale of our Common Shares (or the perception that such sales may occur) may have an adverse effect on prices in the secondary market for our Common Shares. An increase in the number of Common Shares available may put downward pressure on the market price for our Common Shares.

*Dilution Risk.&nbsp;&nbsp;&nbsp;&nbsp;*The voting power of current stockholders will be diluted to the extent that current stockholders do not purchase shares in any future common stock offerings or do not purchase sufficient shares to maintain their percentage interest. In addition, if we sell Common Shares below NAV, our NAV will fall immediately after such issuance.

#### Management of the Company

#### Directors and Officers
Our business and affairs are managed under the direction of the Board. Accordingly, our Board provides broad oversight over our affairs, including oversight of the duties performed by the Adviser. Our officers are responsible for our day-to-day operations. The names, ages, and addresses of each of our directors and officers, together with their principal occupations and other affiliations during the past five years, are set forth in our Annual Report and our proxy statement for our annual meeting of stockholders. Each director and officer will hold office until his or her successor is duly elected and qualifies, or until he or she resigns or is removed in the manner provided by the Charter or Bylaws, as applicable. Unless otherwise indicated, the address of each director and officer is 5901 College Boulevard, Suite 400, Overland Park, Kansas 66211. The Board consists of a majority of directors who are not interested persons (as defined in the 1940 Act) of the Adviser or its affiliates.

#### Investment Adviser and Portfolio Managers
Pursuant to the investment advisory agreement, Tortoise Capital Advisors, L.L.C. regularly provides us with investment research, advice and supervision and furnishes us with an investment program consistent with our investment objective and policies, subject to the oversight of our Board. The Adviser determines from time to time what portfolio securities will be purchased, held or sold, arranges for the placing of orders for the purchase or sale of portfolio securities, selects brokers or dealers to place those orders, maintains our books and records with respect to our securities transactions and reports to the Board on its investments and performance.

The Adviser furnishes office facilities and clerical and administrative services necessary to the operation of the Company (other than services provided by the Company's custodian, accounting agent, administrator, dividend paying agent and other service providers). To the extent requested by the Company, the Adviser shall (i) oversee the performance and fees of the Company's service providers and make such reports and recommendations to the Board concerning such matters as the parties deem desirable; (ii) respond to inquiries and otherwise assist the Company's service providers in the preparation and filing of regulatory reports, proxy statements, shareholder communications and the preparation of Board materials and reports; (iii) establish and oversee the implementation of borrowing facilities or other forms of leverage authorized by the Board; and (iv) supervise any other aspect of the Company's administration as may be agreed upon by the Company and the Adviser. The Company shall reimburse the Adviser or its affiliates for all out-of-pocket expenses incurred in providing these services.

The Adviser is located at 5901 College Boulevard, Suite 400, Overland Park, Kansas 66211. The Adviser invests primarily in publicly traded companies in the energy and power infrastructure sectors, from production to transportation to distribution. The Adviser was formed in October 2002 to provide portfolio management services to institutional and high-net worth investors seeking professional management of their MLP investments. As of March 31, 2026, the Adviser had approximately $10.8 billion of client assets under management. The Adviser's Investment Committee is comprised of four individuals.

Our Adviser is indirectly controlled by Lovell Minnick Partners LLC ("Lovell Minnick") and is an indirect wholly owned subsidiary of Tortoise Parent Holdco LLC ("Tortoise Parent"). A vehicle formed by Lovell Minnick and owned by certain private funds sponsored by Lovell Minnick and a group of institutional co-investors owns a controlling interest in Tortoise Parent. Certain employees own the remaining common interests in Tortoise Parent. Our day-to-day business is managed by the Adviser's senior management team.

The investment management of our portfolio is the responsibility of the Adviser's Investment Committee. The Investment Committee's members are Brian A. Kessens, James R. Mick, Matthew G.P. Sallee and Robert J. Thummel, Jr., all of whom share responsibility for such investment management. It is the policy of the Investment Committee that any one member can require the Adviser to sell a portfolio company, and any one member can veto the committee's decision to invest in a portfolio company.

*<u>Brian A. Kessens</u>*.&nbsp;&nbsp;&nbsp;&nbsp;Mr. Kessens joined the Adviser in 2008. He has been a senior portfolio manager of the Adviser since February 2019, a Managing Director of the Adviser since January 2015, and a member of the Investment Committee of our Adviser since June 30, 2015. He was a portfolio manager of the Adviser from July 2013 to January 2019. He was a senior investment analyst of the Adviser from June 2012 to July 2013, and an

investment analyst from 2008 to June 2012. Previously, from 2004 to 2008, he was a vice president in Citigroup's global energy investment banking practice. Prior to Citigroup, he served from 1997 to 2002 as a field artillery officer in the United States Army. Mr. Kessens earned a Master of Business Administration from Columbia Business School in New York and a Bachelor of Science in economics from the United States Military Academy at West Point. He earned his CFA designation in 2006.

*<u>James R. Mick</u>*.&nbsp;&nbsp;&nbsp;&nbsp;Mr. Mick joined the Adviser in 2006. He has been a senior portfolio manager of the Adviser since February 2019, a Managing Director of the Adviser since January 2014, and a member of the Investment Committee of our Adviser since June 30, 2015. He was a portfolio manager of the Adviser from July 2013 to January 2019. He was a senior investment analyst of the Adviser from June 2012 to July 2013, an investment analyst from 2011 to June 2012, and a research analyst from 2006 to 2011. Previously, he was a senior finance specialist at General Electric Insurance Solutions (now Swiss Re) from 2003 to 2006 and a senior auditor at Ernst & Young from 2000 to 2003. Mr. Mick earned Bachelor of Science degrees in business administration and accounting and a Master of Accounting and Information Systems degree from the University of Kansas. He earned his CFA designation in 2010.

*<u>Matthew G.P. Sallee</u>*.&nbsp;&nbsp;&nbsp;&nbsp;Mr. Sallee joined the Adviser in 2005. He has been a senior portfolio manager of the Adviser since February 2019, a Managing Director of the Adviser since January 2014, and a member of the Investment Committee of our Adviser since June 30, 2015. He was a portfolio manager of the Adviser from July 2013 to January 2019. He was a senior investment analyst of the Adviser from June 2012 to July 2013, an investment analyst from 2009 to June 2012, and a research analyst from 2005 to 2009. Previously, he served for five years (from 2000 to 2005) as a senior financial analyst with Aquila, Inc., where he was responsible for analysis of capital allocation at the firm's communications infrastructure subsidiary, Everest Connections. Mr. Sallee graduated magna cum laude from the University of Missouri with a degree in business administration. He earned his CFA designation in 2009.

*<u>Robert J. Thummel, Jr.</u>&nbsp;&nbsp;&nbsp;&nbsp;*Mr. Thummel joined the Adviser in 2004. He has been a senior portfolio manager of the Adviser since February 2019, a Managing Director of the Adviser since January 2014, and a member of the Investment Committee of our Adviser since June 30, 2015. He was a portfolio manager of the Adviser from July 2013 to January 2019. He was a senior investment analyst of the Adviser from June 2012 to July 2013, and an investment analyst from 2004 to June 2012. Mr. Thummel was previously the president of Tortoise North American Energy Corporation from 2008 until the fund was merged into the Company in June 2014. Previously, he was director of finance at KLT Inc., a subsidiary of Great Plains Energy, from 1998 to 2004 and a senior auditor at Ernst & Young from 1995 to 1998. Mr. Thummel earned a Bachelor of Science in accounting from Kansas State University and a Master of Business Administration degree from the University of Kansas.

The statement of additional information provides additional information about the compensation structure of, the other accounts managed by, and the ownership of our securities by the portfolio managers listed above.

#### Compensation and Expenses
Under its advisory agreement, the Company pays the Adviser, as compensation for the services rendered by it, a fee equal on an annual basis to 0.95% of its average monthly Managed Assets up to $2,500,000,000, 0.90% of our average monthly Managed Assets between $2,500,000,000 and $3,500,000,000, and 0.85% of our average monthly Managed Assets above $3,500,000,000. "Managed Assets" means the Company's total assets (including any assets attributable to leverage that may be outstanding) minus accrued liabilities other than (1) deferred tax liability, and (2) debt entered into for the purpose of leverage. In addition, the Adviser does not charge an advisory fee based on net deferred tax assets. Because the fee paid to the Adviser is determined based on the Company's Managed Assets, the Adviser's interest in determining whether we should incur additional leverage will conflict with the Company's interests. The Company's average monthly Managed Assets are determined for the purpose of calculating the management fee by taking the average of the monthly determinations of Managed Assets during a given calendar quarter. The fees are calculated and accrued monthly and paid quarterly within five days after the end of each calendar quarter.

The advisory agreement has a term ending on December 31, 2026, and may be continued from year to year thereafter as provided in the 1940 Act. The continuation of the advisory agreement was most recently approved by the Board in November 2025. A discussion regarding the basis of the Board's decision to approve the continuation of the advisory agreement is available in the Company's Annual Report to stockholders for the fiscal year ended November 30, 2025.

The Company bears all expenses not specifically assumed by the Adviser incurred in its operations. Expenses the Company bears generally include, but are not limited to, the following: (1) expenses of maintaining and continuing its existence and related overhead, including, to the extent services are provided by personnel of the Adviser or its affiliates, office space and facilities and personnel compensation, training and benefits; (2) its registration under the 1940 Act; (3) commissions, spreads, fees and other expenses connected with the acquisition, holding and disposition of securities and other investments including placement and similar fees in connection with direct placements; (4) auditing, accounting and legal expenses; (5) taxes and interest; (6) governmental fees; (7) expenses of listing its shares with a stock exchange, and expenses of issue, sale, repurchase and redemption (if any) of its interests, including expenses of conducting tender offers for the purpose of repurchasing Common Shares; (8) expenses of registering and qualifying the Company and its shares under federal and state securities laws and of preparing and filing registration statements and amendments for such purposes; (9) expenses of communicating with stockholders, including website expenses and the expenses of preparing, printing and mailing press releases, reports and other notices to stockholders and of meetings of stockholders and proxy solicitations therefor; (10) expenses of reports to governmental officers and commissions; (11) insurance expenses; (12) association membership dues; (13) fees, expenses and disbursements of custodians and sub-custodians for all services to them (including without limitation safekeeping of funds, securities and other investments, keeping of books, accounts and records, and determination of NAVs); (14) fees, expenses and disbursements of transfer agents, dividend paying agents, stockholder servicing agents and registrars for all services to them; (15) compensation and expenses of directors who are not members of the Adviser's organization; (16) pricing and valuation services employed by the Company; (17) all expenses incurred in connection with leveraging of assets through a line of credit or issuing and maintaining notes or preferred stock; (18) all expenses incurred in connection with offerings of common and preferred stock and debt securities; and (19) such non-recurring items as may arise, including expenses incurred in connection with litigation, proceedings and claims and the Company's obligation to indemnify it's directors, officers and stockholders with respect thereto.

#### Closed-End Company Structure
We are a non-diversified closed-end management investment company, and as such our stockholders will not have the right to cause us to redeem their shares. Instead, our Common Shares will trade in the open market at a price that will be a function of several factors, including distribution levels (which are in turn affected by expenses), NAV, call protection, distribution stability, portfolio credit quality, relative demand for and supply of such shares in the market, general market and economic conditions and other factors.

Shares of common stock of closed-end companies frequently trade at a discount to their NAV. This characteristic of shares of closed-end management investment companies is a risk separate and distinct from the risk that our NAV may decrease as a result of investment activities. To the extent that our Common Shares trade at a discount, the Board may from time to time engage in open-market repurchases or tender offers for shares after balancing the benefit to stockholders of the increase in the NAV per share resulting from such purchases against the decrease in our assets and potential increase in the expense ratio of our expenses to assets and the decrease in asset coverage with respect to any outstanding senior securities. The Board believes that in addition to the beneficial effects described above, any such purchases or tender offers may result in the temporary narrowing of any discount but will not have any long-term effect on the level of any discount. There is no guarantee or assurance that the Board will decide to engage in any of these actions. There is also no guarantee or assurance that such actions, if undertaken, would result in the shares trading at a price equal or close to NAV per share. Any stock repurchases or tender offers will be made in accordance with the requirements of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the 1940 Act and the principal stock exchange on which the common stock is traded.

Conversion to an open-end mutual fund is extremely unlikely in light of our investment objective and policies and would require stockholder approval of an amendment to our Charter. If we converted to an open-end mutual fund, we would be required to redeem all debt securities and Outstanding MRP Shares then outstanding (requiring us, in turn, to liquidate a significant portion of our investment portfolio), and our common stock would no longer be listed on the NYSE or any other exchange. In contrast to a closed-end management investment company, shareholders of an open-end mutual fund may require a fund to redeem its shares of common stock at any time (except in certain circumstances as authorized by the 1940 Act or the rules thereunder) at their NAV. In addition, certain of our investment policies and restrictions are incompatible with the requirements applicable to an open-end investment company. Accordingly, conversion to an open-end investment company would require material changes to our investment policies.

#### Certain Federal Income Tax Matters
The following discussion is a general summary of certain material U.S. federal income tax considerations affecting the Company and its stockholders. The discussion reflects applicable U.S. federal income tax laws as of the date of this Prospectus, which tax laws may be changed or subject to new interpretations by the courts or the Internal Revenue Service (the "IRS"), possibly with retroactive effect. No attempt is made to present a detailed explanation of all U.S. federal income, estate, gift, state, local or foreign tax considerations affecting the Company and its stockholders (including stockholders owning large positions in the Company). The discussion set forth herein does not constitute tax advice. Investors are urged to consult their own tax advisers to determine the specific tax consequences to them of investing in the Company, including applicable federal, state, local and foreign tax consequences to them and the effect of possible changes in tax laws.

In addition, no attempt is made to address tax considerations applicable to an investor with a special tax status, such as a financial institution, real estate investment trust, insurance company, RIC, individual retirement account, other tax-exempt organization, dealer in securities or currencies, person holding shares of the Company as part of a hedging, integrated, conversion or straddle transaction or constructive sale, trader in securities that has elected the mark-to-market method of accounting for its securities, U.S. holder (as defined below) whose functional currency is not the U.S. dollar, investor with "applicable financial statements" within the meaning of Section 451(b) of the Internal Revenue Code of 1986, as amended (the "Code"), or Non-U.S. holder (except as otherwise specifically provided below). Furthermore, this discussion does not reflect possible application of the alternative minimum tax. Moreover, this summary does not discuss the consequences of an investment in subscription rights to acquire shares of the Company's stock, as the tax consequences of such an investment will be discussed in one or more supplements to this Prospectus. Unless otherwise noted, this discussion assumes the Company's shares are held by U.S. holders and that such shares are held as capital assets.

A U.S. holder is a beneficial owner that is for U.S. federal income tax purposes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a citizen or individual resident of the United States (including certain former citizens and former long-term residents);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a corporation or other entity treated as a corporation for U.S. federal income tax purposes, created or organized in or under the laws of the United States or any state thereof or the District of Columbia;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;an estate, the income of which is subject to U.S. federal income taxation regardless of its source; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a trust with respect to which a court within the United States is able to exercise primary supervision over its administration and one or more United States persons (as such term is defined under the Code) have the authority to control all of its substantial decisions or the trust has made a valid election in effect under applicable Treasury regulations to be treated as a United States person.

A "Non-U.S. holder" is a beneficial owner of shares of the Company that is an individual, corporation, trust or estate and is not a U.S. holder. If a partnership (including any entity treated as a partnership for U.S. federal income tax purposes) holds shares of the Company, the tax treatment of a partner in the partnership generally will depend upon the status of the partner and the activities of the partnership.

As with any investment, you should seek advice based on your individual circumstances from your own tax adviser.

*Company Status.&nbsp;&nbsp;&nbsp;&nbsp;*The Company intends to continue to qualify as a RIC under the Code. If the Company qualifies as a RIC and distributes to its stockholders at least 90% of the sum of (1) its "investment company taxable income," as that term is defined in the Code (which includes, among other items, dividends, taxable interest and the excess of any net short-term capital gains over net long-term capital losses, as reduced by certain deductible expenses) without regard to the deduction for dividends paid and (2) the excess of its gross tax-exempt interest, if any, over certain deductions attributable to such interest that are otherwise disallowed, the Company will be relieved of U.S. federal income tax on any income of the Company, including long-term capital gains, distributed to stockholders. However, if the Company retains any investment company taxable income or

"net capital gain" (i.e., the excess of net long-term capital gain over net short-term capital loss), it will be subject to U.S. federal income tax at regular corporate federal income tax rates on the amount retained. The Company intends to distribute at least annually substantially all of its investment company taxable income, net tax-exempt interest and net capital gain.

The Company's taxable subsidiary, formed to invest in certain investments, generally will be subject to federal and states taxes on its income.

If the Company fails to qualify as a RIC in any taxable year and is ineligible to or otherwise does not cure such failure for the taxable year, it will be taxed in the same manner as an ordinary corporation on its taxable income and distributions to the Company's stockholders will not be deductible by the Company in computing its taxable income.

Under the Code, the Company generally will also be subject to a nondeductible 4% federal excise tax on the undistributed portion of its ordinary income and capital gains if it fails to meet certain distribution requirements with respect to each calendar year. In order to avoid the 4% federal excise tax, the required minimum distribution is generally equal to the sum of (1) 98% of the Company's ordinary income (computed on a calendar year basis), (2) 98.2% of the Company's capital gain net income (generally computed for the one-year period ending on October 31), and (3) certain amounts retained from previous years to the extent such amounts have not been treated as distributed or been subject to tax under Subchapter M of the Code. The Company generally intends to make distributions in a timely manner in an amount at least equal to the required minimum distribution and therefore, under normal conditions, does not currently expect to be subject to this excise tax.

The Company may invest in MLPs that are treated as qualified publicly traded partnerships for federal income tax purposes. Net income derived from an interest in a qualified publicly traded partnership is included in the sources of income from which a RIC may derive 90% of its gross income. However, no more than 25% of the value of a RIC's total assets at the end of each fiscal quarter may be invested in securities of one or more qualified publicly traded partnerships. If an MLP in which the Company invests is taxed as a partnership for federal income tax purposes, the Company will include in its income its allocable share of the MLP's income regardless of whether the Company receives any distributions from the MLP. Thus, the Company may be required to sell other securities under disadvantageous circumstances to generate cash or may have to leverage itself by borrowing the cash in order to satisfy the distribution requirements to qualify as a RIC and to avoid federal income and excise taxes. Distributions to the Company from an MLP that is taxed as a partnership for federal income tax purposes will constitute a return of capital to the extent of the Company's basis in its interest in the MLP. If the Company's basis is reduced to zero, distributions will constitute capital gain for federal income tax purposes.

If the Company invests in certain pay-in-kind securities, zero coupon securities, deferred interest securities or, in general, any other securities with original issue discount (or with market discount if the Company elects to include market discount in income currently), the Company must accrue income on such investments for each taxable year, which generally will be prior to the receipt of the corresponding cash payments. However, the Company must distribute to stockholders, at least annually, all or substantially all of its investment company taxable income (determined without regard to the deduction for dividends paid), including such income it is required to accrue, to qualify as a RIC and avoid federal income and excise taxes. Therefore, the Company may have to dispose of its portfolio securities under disadvantageous circumstances to generate cash, or may have to leverage itself by borrowing the cash, to satisfy these distribution requirements.

Certain of the Company's investment practices are subject to special and complex federal income tax provisions that may, among other things, (1) convert distributions that would otherwise constitute qualified dividend income into ordinary income taxed at the higher rate applicable to ordinary income, (2) treat distributions that would otherwise be eligible for the corporate dividends received deduction as ineligible for such treatment, (3) disallow, suspend or otherwise limit the allowance of certain losses or deductions, (4) convert long-term capital gain into short-term capital gain or ordinary income, (5) convert an ordinary loss or deduction into a capital loss (the deductibility of which is more limited), (6) cause the Company to recognize income or gain without a corresponding receipt of cash, (7) adversely affect the time as to when a purchase or sale of stock or securities is deemed to occur, (8) adversely alter the characterization of certain complex financial transactions, and (9) produce income that will not be included in the sources of income from which a RIC must derive at least 90% of its gross income each year. While it may not always be successful in doing so, the Company will seek to avoid or minimize any adverse tax consequences of its investment practices.

The Company may hold or acquire debt securities that are market discount bonds. A market discount bond is a security acquired in the secondary market at a price below its redemption value (or its adjusted issue price if it is also an original issue discount bond). If the Company invests in a market discount bond, it will be required to treat any gain recognized on the disposition of such market discount bond as ordinary taxable income to the extent of the accrued market discount.

The Company's investment in lower rated or unrated debt securities may present issues for the Company if the issuers of these securities default on their obligations because the federal income tax consequences to a holder of such securities are not certain.

*Distributions.&nbsp;&nbsp;&nbsp;&nbsp;*The Company's distributions are generally taxable. After the end of each year, you will receive a tax statement that separates the distributions of the Company into different categories, including identifying ordinary income distributions and capital gain dividends. Ordinary income distributions are generally taxed at your ordinary income tax rate, however, as further discussed below, certain ordinary income distributions received from the Company may be taxed at the capital gains income tax rates. Generally, you will treat all net capital gain dividends (the excess of net long-term capital gains over net short-term capital losses) as long-term capital gains regardless of how long you have owned your shares.

Distributions in excess of the Company's current or accumulated earnings and profits will be treated, first, as a tax-free return of capital, which is applied against and will reduce the adjusted basis of the Company shares and, after such adjusted basis is reduced to zero, generally will constitute capital gain. Due to the federal income tax characterization of distributions received from MLPs, the Company anticipates that a significant portion of its distributions may constitute a return of capital for federal income tax purposes. No assurance can be given as to whether or to what extent the Company's distributions will be characterized as dividend income or as a return of capital, and the character of distributions may vary from year to year.

To determine your actual tax liability for your net capital gain dividends, you must calculate your total net capital gain or loss for the tax year after considering all of your other taxable transactions, as described below. In addition, the Company may make distributions that represent a return of capital for federal income tax purposes and thus will generally not be taxable to you; however, such distributions may reduce your tax basis in your shares, which could result in you having to pay a greater amount of tax in the future when shares are sold, even if you sell the shares at a loss from your original investment. A "return of capital" is a return, in whole or in part, of the funds that you previously invested in the Company. A return of capital distribution should not be considered part of the Company's dividend yield or total return of an investment in Company shares of common stock. The federal income tax status of your distributions from the Company is not affected by whether you reinvest your distributions in additional shares or receive them in cash. The income from the Company that you must take into account for federal income tax purposes is not reduced by amounts used to pay a deferred sales fee, if any.

The Company may retain for investment some (or all) of its net capital gains. If the Company retains any net capital gains or investment company taxable income, it will be subject to tax at regular corporate rates on the amount retained. If the Company retains any net capital gains, it may designate the retained amount as undistributed capital gains in a notice to its shareholders who, if subject to federal income tax on long-term capital gains, (1) will be required to include in income for federal income tax purposes, as long-term capital gain, their share of such undistributed amount; (2) will be entitled to credit their proportionate shares of the federal income tax paid by the Company on such undistributed amount against their federal income tax liabilities, if any; and (3) may claim refunds to the extent the credit exceeds such liabilities. For federal income tax purposes, the basis of shares owned by a shareholder of the Company will be increased by an amount equal to the difference between the amount of undistributed capital gains included in the shareholder's gross income and the tax deemed paid by the shareholder under clause (2) of the preceding sentence.

The IRS currently requires that a RIC that has two or more classes of stock allocate to each such class proportionate amounts of each type of its income (such as ordinary income and capital gains). Accordingly, the Company reports dividends made with respect to common shares and preferred shares as consisting of particular types of income (e.g., net capital gains and ordinary income) in accordance with each class's proportionate share of the total dividends paid by the Company with respect to the year.

A U.S. holder that is a corporation generally will not be entitled to the dividends received deduction with respect to many dividends received from the Company because the dividends received deduction is generally not available for distributions from RICs. However, certain ordinary income dividends on shares that are attributable to qualifying dividends received by the Company from certain corporations may be reported by the Company as being eligible for the dividends received deduction provided certain holding period and other requirements are satisfied by both the Company and the U.S. holder.

If you are a U.S. holder that is an individual, the maximum marginal stated federal income tax rate for net capital gain is generally 20% (15% or 0% for taxpayers with taxable incomes below certain thresholds). Some capital gains, including some portion of your capital gain dividends may be taxed at a higher maximum stated tax rate. Capital gains may also be subject to the Medicare tax described below. Corporate U.S. holders are taxed on capital gains at the same rates as apply to ordinary income.

Ordinary income dividends attributable to qualifying dividends received by the Company itself that are distributed to non-corporate U.S. holders of the Company are generally taxed at the same rates that apply to net capital gain (as discussed above), provided certain holding period requirements are satisfied by both the Company and the U.S. holder. The Company will provide notice to its stockholders of the amount of any distribution which may be taken into account as a dividend that is eligible for the capital gains tax rates.

An election may be available to you to defer recognition of the gain attributable to a capital gain dividend if you make certain qualifying investments within a limited time. You should talk to your tax adviser about the availability of this deferral election and its requirements.

*Medicare Tax.&nbsp;&nbsp;&nbsp;&nbsp;*An additional 3.8% "Medicare tax" is imposed on the net investment income of U.S. holders that are individuals with a modified adjusted gross income of over $200,000 ($250,000 in the case of joint filers) and on the undistributed net investment income of U.S. holders that are estates and trusts. For these purposes, "net investment income" generally will include interest, dividends, annuities, royalties, rent, net gain attributable to the disposition of property not held in a trade or business (including net gain from the sale, exchange or other taxable disposition of shares of the Company) and certain other income, but will be reduced by any deductions properly allocable to such income or net gain. Thus, certain of the Company's taxable distributions and gains on the sale of Company shares may be subject to this additional tax.

*Sale of Shares.&nbsp;&nbsp;&nbsp;&nbsp;*If you are a U.S. holder and you sell or redeem your shares, you will generally recognize a taxable gain or loss. To determine the amount of this gain or loss, you must subtract your tax basis in your shares from the amount you receive in the transaction. Your tax basis in your shares is generally equal to the cost of your shares, generally including brokerage fees, if any. In some cases, however, you may have to adjust your tax basis after you purchase your shares. An election may be available to you to defer recognition of capital gain if you make certain qualifying investments within a limited time. You should talk to your tax adviser about the availability of this deferral election and its requirements. Capital gain or loss is long-term if the holding period for the shares is more than one year and is short-term if the holding period for the shares is one year or less. You must exclude the date you purchase your shares to determine your holding period. The tax rates for capital gains realized from assets held for one year or less are generally the same as for ordinary income. Any loss upon the sale or exchange of Company shares of common stock held for six months or less will be treated as long-term capital loss to the extent of any net capital gain dividends you received with respect to such shares and any loss realized on a sale or exchange of shares of the Company generally will be disallowed if you acquire other shares of the Company or other substantially identical shares within a 61-day period beginning 30 days before and ending 30 days after the date that you dispose of the shares. In such case, the basis of the shares acquired will be adjusted to reflect the disallowed loss. Capital losses are subject to limitations under the Code.

*Non*-U*.S. Tax Credit*.*&nbsp;&nbsp;&nbsp;&nbsp;*The Company may invest in non-U.S. securities and may be subject to withholding and other taxes imposed by foreign countries, including taxes on interest, dividends and capital gains with respect to its investments in those countries, which would, if imposed, reduce the yield on or return from those investments. Income tax treaties between certain countries and the United States may reduce or eliminate such taxes in some cases. The Company does not expect to satisfy the requirements for passing through to its stockholders their pro rata shares of qualified foreign taxes paid by the Company, with the result that stockholders will not be entitled to a tax deduction or credit for such taxes on their own U.S. federal income tax returns, although the Company's payment of such taxes will remain eligible for a foreign tax credit or a deduction in computing the Company's taxable income.

*Investments in Certain Non*-U*.S. Corporations*.*&nbsp;&nbsp;&nbsp;&nbsp;*If the Company holds an equity interest in any "passive foreign investment companies" ("PFICs"), which are generally certain non-U.S. corporations that receive at least 75% of their annual gross income from passive sources (such as interest, dividends, certain rents and royalties or capital gains) or that hold at least 50% of their assets in investments producing such passive income, the Company could be subject to U.S. federal income tax and additional interest charges on gains and certain distributions with respect to those equity interests, even if all the income or gain is timely distributed to its stockholders. The Company will not be able to pass through to its stockholders any credit or deduction for such taxes. The Company may be able to make an election that could ameliorate these adverse tax consequences. In this case, the Company would recognize as ordinary income any increase in the value of such PFIC shares, and as ordinary loss any decrease in such value to the extent it did not exceed prior increases included in income. Under this election, the Company might be required to recognize in a year income in excess of its distributions from PFICs and its proceeds from dispositions of PFIC stock during that year, and such income would nevertheless be subject to the distribution requirement and would be taken into account for purposes of a 4% excise tax that can be imposed if a fund fails to meet certain calendar year distribution requirements contained in the Code. Dividends paid by PFICs are not treated as qualified dividend income.

*Backup Withholding.&nbsp;&nbsp;&nbsp;&nbsp;*The Company may be required to withhold federal income tax at a rate of 24% from all distributions and redemption proceeds payable to a U.S. holder if the U.S. holder fails to provide the Company with his, her or its correct taxpayer identification number or to make required certifications, or if the U.S. holder has been notified by the IRS (or the IRS notifies the Company) that he, she or it is subject to backup withholding. Backup withholding is not an additional tax; rather, it is a way in which the IRS ensures it will collect taxes otherwise due. Any amounts withheld may be credited against a stockholder's federal income tax liability on such stockholder's U.S. federal income tax return.

*Non*-U*.S. holders*.*&nbsp;&nbsp;&nbsp;&nbsp;*If you are a Non-U.S. holder, you should be aware that, generally, subject to applicable income tax treaties, distributions from the Company to the extent of its current or accumulated earnings and profits will be characterized as dividends for federal income tax purposes (other than dividends which the Company properly reports as capital gain dividends) and will be subject to U.S. federal income taxes, including withholding taxes, subject to certain exceptions described below. However, distributions received by a Non-U.S. holder from the Company that are properly reported by the Company as capital gain dividends may not be subject to U.S. federal income taxes, including withholding taxes, provided that the Company makes certain elections and certain other conditions are met. Distributions from the Company that are properly reported by the Company as an interest-related dividend attributable to certain interest income received by the Company or as a short-term capital gain dividend attributable to certain net short-term capital gain income received by the Company may not be subject to U.S. federal income taxes, including withholding taxes when received by certain Non-U.S. holders, provided that the Company makes certain elections and certain other conditions are met. The Company may choose not to make such elections even if they are otherwise available.

*The Foreign Account Tax Compliance Act ("FATCA").&nbsp;&nbsp;&nbsp;&nbsp;*FATCA generally requires the Company to obtain information sufficient to identify the status of each of its stockholders. If a stockholder fails to provide this information or otherwise fails to comply with FATCA, the Company may be required to withhold under FATCA at a rate of 30% with respect to that stockholder on Company dividends and distributions and redemption proceeds. The Company may disclose the information that it receives from (or concerning) its stockholders to the IRS, non-U.S. taxing authorities or other parties as necessary to comply with FATCA, related intergovernmental agreements or other applicable law or regulation. Investors are urged to consult their own tax advisers regarding the applicability of FATCA and any other reporting requirements with respect to the investor's own situation, including investments through an intermediary.

Pursuant to proposed regulations, the Treasury Department has indicated its intent to eliminate the requirements under FATCA of withholding on gross proceeds from the sale, exchange, maturity or other disposition of relevant financial instruments (including redemptions of stock). The Treasury Department has indicated that taxpayers may rely on these proposed regulations pending their finalization.

The foregoing is a general and abbreviated summary of the provisions of the Code and the Treasury regulations in effect as they directly govern the taxation of the Company and its stockholders. These provisions are subject to change by legislative and administrative action, and any such change may be retroactive. Stockholders are urged to consult their own tax advisers regarding the U.S. federal, foreign, state, local income or other taxes based on their particular circumstances.

#### Determination of Net Asset Value
We compute our net asset value for our Common Shares as of the close of trading on the NYSE (normally 4:00 p.m. Eastern time) no less frequently than the last business day of each calendar month and at such other times as the Board may determine. We currently make our net asset value available for publication daily. Our investment transactions are generally recorded on a trade date plus one day basis, other than for quarterly and annual reporting purposes. For purposes of determining the net asset value of a Common Share, our net asset value will equal the value of our total assets (the value of the securities we hold, plus cash or other assets, including interest accrued but not yet received and net deferred tax assets) less (1) all of its liabilities (including without limitation accrued expenses and both current and net deferred tax liabilities), (2) accumulated and unpaid interest payments and distributions on any outstanding debt or preferred stock, respectively, (3) the aggregate liquidation value of any outstanding preferred stock, (4) the aggregate principal amount of any outstanding senior debt securities, and (5) any distributions payable on the common stock. The net asset value per Common Share will equal our net asset value divided by the number of outstanding Common Shares.

Pursuant to an agreement with the Accounting Services Provider, the Accounting Services Provider will value our assets in accordance with Valuation Procedures adopted by the Board. The Accounting Services Provider will obtain securities market quotations from independent pricing services approved by the Adviser and ratified by the Board. Securities for which market quotations are readily available shall be valued at "market value." Any other securities shall be valued pursuant to fair value methodologies approved by the Board.

Valuation of certain assets at market value will be as follows. For equity securities, the Accounting Services Provider will first use readily available market quotations and will obtain direct written broker-dealer quotations if a security is not traded on an exchange or over-the-counter or quotations are not available from an approved pricing service. For fixed income securities, the Accounting Services Provider will use readily available market quotations based upon the last sale price of a security on the day we value our assets or a market value from a pricing service or by obtaining a direct written broker-dealer quotation from a dealer who has made a market in the security. For options, futures contracts and options on futures contracts, the Accounting Services Provider will use readily available market quotations. If no sales are reported on any exchange or over-the-counter ("OTC") market for an option, futures contract or option on futures contracts, the Accounting Services Provider will use for exchange traded options, the mean between the highest bid and lowest asked prices obtained as of the closing of the exchanges on which the option is traded, and for non-exchange traded options and futures, the calculated mean based on bid and asked prices obtained from the OTC market.

If the Accounting Services Provider cannot obtain a market value or the Adviser determines that the value of a security as so obtained does not represent a fair value as of the valuation time (due to a significant development subsequent to the time its price is determined or otherwise), fair value for the security shall be determined pursuant to the Valuation Procedures adopted by the Board. The Valuation Procedures provide that the Adviser will consider a variety of factors with respect to the individual issuer and security in determining and monitoring the continued appropriateness of fair value, including, without limitation, financial statements and fundamental data with respect to the issuer, cost, the amount of any discount, restrictions on transfer and registration rights and other information deemed relevant. A report of any prices determined pursuant to certain preapproved methodologies will be presented to the Board or a designated committee thereof for approval no less frequently than quarterly. The Valuation Procedures currently provide for methodologies to be used to fair value equity securities and debt securities. With respect to equity securities, among the factors used to fair value a security subject to restrictions on resale is whether the security has a common share counterpart trading in a public market. If a security does not have a common share counterpart, the security shall be valued initially and thereafter by the Investment Committee of the Adviser (the "Pricing Committee") based on all relevant factors, and such valuation will be presented to the Board for review and ratification no less frequently than quarterly. If a security has a common share counterpart trading in a public market or is convertible into publicly-traded common shares, the Pricing Committee shall determine an appropriate percentage discount for the security in light of its resale restrictions and/or, as applicable, conversion restrictions and other factors.

With respect to debt securities, among the various factors that can affect the value of such securities are (i) whether the issuing company has freely trading debt securities of the same maturity and interest rate; (ii) whether the issuing company has an effective registration statement in place for the securities; and (iii) whether a market is made in the securities. Subject to the particular considerations of an issue, debt securities generally will be valued at amortized cost.

The foregoing methods for fair valuing securities may be used only as long as the Adviser believes they continue to represent fair value and the discussion above is qualified in its entirety by our Valuation Procedures.

In computing net asset value, we will review the valuation of the obligation for income taxes separately for current taxes and deferred taxes due to the differing impact of each on (i) the anticipated timing of required tax payments and (ii) on the treatment of distributions by us to our stockholders.

#### Automatic Dividend Reinvestment and Cash Purchase Plan
Our Automatic Dividend Reinvestment and Cash Purchase Plan (the "Plan") allows participating common stockholders to reinvest distributions in additional Common Shares and allows participants to purchase additional Common Shares through additional optional cash investments in amounts from a minimum of $100 to a maximum of $5,000 per month. Common Shares will be issued by us under the Plan when our Common Shares are trading at a premium to NAV. If our Common Shares trading at a discount to NAV, shares distributed under the Plan will be purchased on the open market at market price. Common Shares issued directly from us under the Plan will be acquired at the greater of (1) NAV at the close of business on the payment date of the distribution or on the day preceding the relevant cash purchase investment date or (2) 95% of the market price per Common Share on the distribution payment date or on the day preceding the relevant cash purchase investment date. See below for more details about the Plan.

If a stockholder's shares are registered directly with us or with a brokerage firm that participates in the Plan, all distributions are automatically reinvested for stockholders by the plan agent, Computershare Trust Company, N.A. (the "Plan Agent"), in additional Common Shares (unless a stockholder is ineligible or elects otherwise). Stockholders who elect not to participate in the Plan will receive all distributions payable in cash paid by check mailed directly to the stockholder of record (or, if the shares are held in street or other nominee name, then to such nominee) by the Plan Agent, as dividend paying agent. Such stockholders may elect not to participate in the Plan and to receive all distributions in cash by sending written, telephone or Internet instructions to the Plan Agent, as dividend paying agent, at the address set forth below. Participation in the Plan is completely voluntary and may be terminated or resumed at any time without penalty by giving notice in writing to the Plan Agent; such termination will be effective with respect to a particular distribution if notice is received prior to the record date for such distribution.

Whenever we declare a distribution payable either in shares or in cash, non-participants in the Plan will receive cash, and participants in the Plan will receive the amount set forth below in Common Shares. The shares are acquired by the Plan Agent for the participant's account, depending upon the circumstances described below, either (i) through receipt of additional Common Shares directly from us ("Additional Common Shares") or (ii) by purchase of outstanding Common Shares on the open market ("open-market purchases") on the NYSE or elsewhere. If, on the payment date, the NAV per Common Share is equal to or less than the market price per Common Share plus estimated brokerage commissions (such condition being referred to herein as "market premium"), the Plan Agent will receive Additional Common Shares from us for each participant's account. The number of Additional Common Shares to be credited to the participant's account will be determined by dividing the dollar amount of the distribution by the greater of (i) the NAV per Common Share on the payment date, or (ii) 95% of the market price per Common Share on the payment date.

If, on the payment date, the NAV per Common Share exceeds the market price plus estimated brokerage commissions (such condition being referred to herein as "market discount"), the Plan Agent will invest the distribution amount in shares acquired in open-market purchases as soon as practicable but not later than thirty (30) days following the payment date. We expect to declare and pay monthly distributions. The weighted average price (including brokerage commissions) of all common stock purchased by the Plan Agent as Plan Agent will be the price per Common Share allocable to each participant.

The Plan Agent maintains all stockholders' accounts in the Plan and furnishes written confirmation of each acquisition made for the participant's account as soon as practicable, but in no event later than 60 days after the date thereof. Shares in the account of each Plan participant may be held by the Plan Agent in non-certificated form in the Plan Agent's name or that of its nominee, and each stockholder's proxy will include those shares purchased or received pursuant to the Plan. The Plan Agent will forward all proxy solicitation materials to participants and vote proxies for shares held pursuant to the Plan first in accordance with the instructions of the participants, and then with respect to any proxies not returned by such participant, in the same proportion as the Plan Agent votes the proxies returned by the participants.

There are no brokerage charges with respect to shares issued directly by us as a result of distributions payable either in shares or in cash. However, each participant will pay a pro rata share of brokerage commissions incurred with respect to the Plan Agent's open-market purchases in connection with the reinvestment of distributions. If a participant elects to have the Plan Agent sell part or all of his or her common stock and remit the proceeds, such participant will be charged his or her pro rata share of brokerage commissions on the shares sold plus a $15.00 transaction fee.

The automatic reinvestment of distributions will not relieve participants of any federal, state or local income tax that may be payable (or required to be withheld) on such distributions.

Stockholders participating in the Plan may receive benefits not available to stockholders not participating in the Plan. If the market price plus commissions of our Common Shares is higher than the NAV, participants in the Plan will receive Common Shares at less than they could otherwise purchase such shares and will have shares with a cash value greater than the value of any cash distribution they would have received on their shares. If the market price plus commissions is below the NAV, participants will receive distributions of Common Shares with a NAV greater than the value of any cash distribution they would have received on their shares. However, there may be insufficient shares available in the market to make distributions in shares at prices below the NAV. Also, because we do not redeem our common stock, the price on resale may be more or less than the NAV.

*Cash Purchase Option.&nbsp;&nbsp;&nbsp;&nbsp;*Participants in the Plan may elect to purchase additional Common Shares through optional cash investments in amounts ranging from $100 to $5,000 per month unless a request for waiver has been granted. Optional cash investments may be delivered to the Plan Agent by personal check, by automatic or electronic bank account transfer or by online access at *www.computershare.com*. We reserve the right to reject any purchase order. We do not accept cash, travelers' checks, third party checks, money orders and checks drawn on non-US banks.

For participants to participate in the cash investment option in any given month, the Plan Agent must receive from the participant any optional cash investment no later than two business days prior to the monthly investment date (the "payment date") for purchase of common shares on the next succeeding purchase date. All optional cash investments received on or prior to the payment date will be applied by the Plan Agent to purchase shares on the next succeeding purchase date. Participants may obtain a schedule of relevant dates on our website at *www.tortoisecapital.com* or by calling 1-866-362-9331.

Common Shares purchased pursuant to this option will be issued by us when our Common Shares are trading at a premium to NAV. If our Common Shares are trading at a discount to NAV, Common Shares will be purchased in the open market by the Plan Agent as described above with respect to reinvestments of distributions.

*General.&nbsp;&nbsp;&nbsp;&nbsp;*Experience under the Plan may indicate that changes are desirable. Accordingly, we reserve the right to amend or terminate the Plan if in the judgment of the Board such a change is warranted. The Plan may be terminated by the Plan Agent or us upon notice in writing mailed to each participant at least 60 days prior to the effective date of the termination. Upon any termination, the Plan Agent will cause a certificate or certificates to be issued for the full shares held by each participant under the Plan and cash adjustment for any fraction of a share of common stock at the then current market value of common stock to be delivered to him or her. If preferred, a participant may request the sale of all the common stock held by the Plan Agent in his or her Plan account in order to terminate participation in the Plan. If such participant elects in advance of such termination to have the Plan Agent sell part or all his or her shares, the Plan Agent is authorized to deduct from the proceeds a $15.00 transaction fee plus a $0.05 fee per share for the transaction. If a participant has terminated his or her participation in the Plan but continues to have common stock registered in his or her name, he or she may re-enroll in the Plan at any time by notifying the Plan Agent in writing at the address below. The terms and conditions of the Plan may be amended by the Plan Agent or by us at any time. Any such amendments to the Plan may be made by mailing to each participant appropriate written notice at least 30 days prior to the effective date of the amendment, except, when necessary or appropriate to comply with applicable law or the rules or policies of the SEC or any other regulatory authority, such prior notice does not apply. The amendment shall be deemed to be accepted by each participant unless, prior to the effective date thereof, the Plan Agent receives notice of the termination of the participant's account under the Plan. Any such amendment may include an appointment by the Plan Agent of a successor Plan Agent, subject to our prior written approval of the successor Plan Agent.

All correspondence concerning the Plan should be directed to Computershare Trust Company, N.A., P.O. Box 43006 Providence, RI 02940-3006.

#### Description of Securities
The information contained under this heading is only a summary and is subject to the provisions contained in our Charter and Bylaws and the laws of the State of Maryland.

#### C ommon S tock
*General.&nbsp;&nbsp;&nbsp;&nbsp;*Our Charter authorizes us to issue up to 100,000,000 Common Shares. The Board may, without any action by the stockholders, amend our Charter from time to time to increase or decrease the aggregate number of shares of stock or the number of shares of stock of any class or series that we have authority to issue under our Charter. Additionally, the Charter authorizes our Board, without any action by our stockholders, to classify and reclassify any unissued common stock and preferred stock into other classes or series of stock from time to time by setting or changing the terms, preferences, conversion or other rights, voting powers, restrictions, limitations as to dividends or other distributions, qualifications and terms and conditions of redemption for each class or series. Although there is no present intention of doing so, we could issue a class or series of stock that could delay, defer or prevent a transaction or a change in control of us that might otherwise be in the stockholders' best interests. Under Maryland law, stockholders generally are not liable for our debts or obligations.

All Common Shares offered pursuant to this Prospectus and any related Prospectus Supplement will be, upon issuance, duly authorized, fully paid and nonassessable. All Common Shares offered pursuant to this Prospectus and any related Prospectus Supplement will be of the same class and will have identical rights, as described below. Holders of Common Shares are entitled to receive distributions when authorized by the Board and declared by us out of assets legally available for the payment of distributions. Holders of Common Shares have no preference, conversion, exchange, sinking fund, redemption or appraisal rights and have no preemptive rights to subscribe for any of our securities. All Common Shares have equal distribution, liquidation and other rights.

*Distributions.&nbsp;&nbsp;&nbsp;&nbsp;*The Company has adopted a managed distribution policy ("MDP"). Currently, distribution amounts are expected to fall in the range of 10% to 15% of the average week-ending NAV per share for the prior fiscal semi-annual period. Distribution amounts will be reset both up and down to provide a consistent return on trailing NAV. Under the MDP, distribution amounts will normally be reset in February and August, with no changes in distribution amounts in May and November. The fund may designate a portion of its distributions as capital gains and may also distribute additional capital gains in the last quarter of the year to meet annual excise distribution requirements. Distribution amounts are subject to change from time to time at the discretion of the Board.

If a stockholder's shares are registered directly with us or with a brokerage firm that participates in the Plan, distributions will be automatically reinvested in additional common stock under the Plan unless a stockholder elects to receive distributions in cash. If a stockholder elects to receive distributions in cash, payment will be made by check. All or a portion of such distribution may be taxable to Company shareholders and will generally be taxed as ordinary income or capital gains for federal income tax purposes. Such distributions will be taxable for federal income tax purposes whether they are paid in cash or reinvested in additional shares. To the extent a portion of distributions are treated as return of capital, such amounts are not currently taxable but reduce the shareholder's basis in the shares. See "Automatic Dividend Reinvestment and Cash Purchase Plan."

The yield on our Common Shares will likely vary from period to period depending on factors including the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;market conditions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the timing of our investments in portfolio securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the securities comprising our portfolio;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;changes in interest rates (including changes in the relationship between short-term rates and long-term rates);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the amount and timing of the use of borrowings and other leverage by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the effects of leverage on our Common Shares;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the timing of the investment of offering proceeds and leverage proceeds in portfolio securities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;our net assets and operating expenses.

Consequently, we cannot guarantee any particular yield on our Common Shares, and the yield for any given period is not an indication or representation of future yields on the common stock.

*Limitations on Distributions*.

So long as shares of preferred stock are outstanding, holders of Common Shares will not be entitled to receive any distributions from us unless we have paid all accumulated distributions on preferred stock, and unless asset coverage (as defined in the 1940 Act) with respect to preferred stock would be at least 200% after giving effect to such distributions.

So long as senior securities representing indebtedness are outstanding, holders of Common Shares will not be entitled to receive any distributions from us unless we have paid all accrued interest on such senior indebtedness and unless asset coverage (as defined in the 1940 Act) with respect to any outstanding senior indebtedness would be at least 300% after giving effect to such distributions. See "Leverage."

*Liquidation Rights.&nbsp;&nbsp;&nbsp;&nbsp;*Common stockholders are entitled to share ratably in the assets legally available for distribution to stockholders in the event of liquidation, dissolution or winding up, after payment of or adequate provision for all known debts and liabilities, including any outstanding debt securities or other borrowings and any interest accrued thereon. These rights are subject to the preferential rights of any other class or series of our stock, including the preferred stock. The rights of common stockholders upon liquidation, dissolution or winding up are subordinated to the rights of holders of senior notes and preferred stock.

*Voting Rights.&nbsp;&nbsp;&nbsp;&nbsp;*Each outstanding share of common stock entitles the holder to one vote on all matters submitted to a vote of stockholders, including the election of directors. The presence of the holders of shares of stock entitled to cast a majority of the votes entitled to be cast shall constitute a quorum at a meeting of stockholders, except with respect to any matter that, under applicable statutes or regulatory requirements, requires approval by a separate vote of one or more classes of stock, in which case the presence in person or by proxy of the holders of shares entitled to cast a majority of the votes entitled to be cast by each such class on such a matter shall constitute a quorum. The Charter provides that, except as otherwise provided in the Bylaws, directors shall be elected by the affirmative vote of the holders of a majority of the shares of stock outstanding and entitled to vote thereon. The Bylaws provide that directors are elected by a plurality of all the votes cast at a meeting of stockholders duly called and at which a quorum is present. There is no cumulative voting in the election of directors. Consequently, at each annual meeting of stockholders, the holders of a majority of the outstanding shares of stock entitled to vote will be able to elect all of the successors of the class of directors whose terms expire at that meeting, provided that holders of preferred stock, as a class, have the right to elect two directors at all times. Pursuant to the Bylaws, the Board may amend the Bylaws to alter the vote required to elect directors.

Under the rules of the NYSE applicable to listed companies, we normally will be required to hold an annual meeting of stockholders in each fiscal year. If we are converted to an open-end company or if for any other reason the shares are no longer listed on the NYSE (or any other national securities exchange the rules of which require annual meetings of stockholders), we may amend our Bylaws so that we are not otherwise required to hold annual meetings of stockholders.

*Issuance of Additional Shares.&nbsp;&nbsp;&nbsp;&nbsp;*The provisions of the 1940 Act generally require that the public offering price of common stock of a closed-end investment company (less underwriting commissions and discounts) must equal or exceed the NAV of such company's common stock (calculated within 48 hours of pricing), unless such sale is made with the consent of a majority of the company's outstanding common stockholders.

*Market.&nbsp;&nbsp;&nbsp;&nbsp;*Our common stock trades on the NYSE under the ticker symbol "TYG." Common Shares issued pursuant to this Prospectus will trade on the NYSE.

*Transfer Agent, Dividend Paying Agent and Automatic Dividend Reinvestment and Cash Purchase Plan Agent.&nbsp;&nbsp;&nbsp;&nbsp;*Computershare Trust Company, N.A., P.O. Box 30170 College Station, TX 77842-3170, serves as the transfer agent and the Automatic Dividend Reinvestment and Cash Purchase Plan agent, and Computershare, Inc. serves as the dividend paying agent for our common stock.

#### S ubscription R ights
We may in the future, and at our discretion, choose to make offerings of Rights to our shareholders to purchase Common Shares. Rights may be issued independently or together with any other offered security and may or may not be transferable by the person purchasing or receiving the Rights. In connection with a Rights offering to shareholders, we would distribute certificates or other documentation evidencing the Rights and a Prospectus Supplement to our shareholders as of the record date that we set for determining the shareholders eligible to receive Rights in such Rights offering. Any such future Rights offering will be made in accordance with the 1940 Act and, to the extent such Rights are transferable, will comply with applicable interpretations of the SEC or its staff, as such interpretations may be modified in the future, which currently require that: (i) the Board make a good faith determination that such offering would result in a net benefit to existing shareholders; (ii) the offering fully protects shareholders' preemptive rights and does not discriminate among shareholders (except for the possible effect of not offering fractional rights); (iii) management uses its best efforts to ensure an adequate trading market in the Rights for use by shareholders who do not exercise such Rights; and (iv) the ratio of such transferable Rights offering does not exceed one new share for each three rights held.

The applicable Prospectus Supplement would describe the following terms of the Rights (to the extent each is applicable) in respect of which this Prospectus is being delivered:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the period of time the offering would remain open;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the underwriter or distributor, if any, of the Rights and any associated underwriting fees or discounts applicable to purchases of the Rights;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the title of such Rights;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the exercise price for such Rights (or method of calculation thereof);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the number of such Rights issued in respect of each share;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the number of Rights required to purchase a single share;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the extent to which such Rights are transferable and the market on which they may be traded if they are transferable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if such Rights are transferable, a discussion regarding the Board's basis for determining that such offering would result in a net benefit to existing shareholders;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if applicable, a discussion of the material U.S. federal income tax considerations applicable to the issuance or exercise of such Rights;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the date on which the right to exercise such Rights will commence, and the date on which such Rights will expire (subject to any extension);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the extent to which such Rights include an over-subscription privilege with respect to unsubscribed securities and the terms of such over-subscription privilege;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;termination rights the Company may have in connection with such Rights offering; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any other terms of such Rights, including exercise, settlement and other procedures and limitations relating to the transfer and exercise of such Rights.

A certain number of Rights would entitle the holder of the Right(s) to purchase for cash such number of shares at such exercise price as in each case is set forth in, or be determinable as set forth in, the Prospectus Supplement relating to the Rights offered thereby. Rights would be exercisable at any time up to the close of business on the expiration date for such Rights set forth in the Prospectus Supplement. After the close of business on the expiration date, all unexercised Rights would become void. Upon expiration of the Rights offering and the receipt of payment and the Rights certificate or other appropriate documentation properly executed and completed and duly executed at the corporate trust office of the Rights agent, or any other office indicated in the Prospectus Supplement, the Common Shares purchased as a result of such exercise will be issued as soon as practicable. To the extent permissible under applicable law, the Company may determine to offer any unsubscribed offered securities directly to persons other than shareholders, to or through agents, underwriters or dealers or through a combination of such methods, as set forth in the applicable Prospectus Supplement.

#### P referred S tock
The following is a brief description of the terms of the Series F Mandatory Redeemable Preferred Shares (the "Series F MRP Shares"), Series G Mandatory Redeemable Preferred Shares (the "Series G MRP Shares"), Series H Mandatory Redeemable Preferred Shares (the "Series H MRP Shares"), Series I Mandatory Redeemable Preferred Shares (the "Series I MRP Shares"), and Series J Mandatory Redeemable Preferred Shares (the "Series J MRP Shares" and, collectively with the Series F MRP Shares, the Series G MRP Shares, the Series H MRP Shares and the Series I MRP Shares, the "Outstanding MRP Shares") currently outstanding as of the date of this Prospectus. This description does not purport to be complete and is subject to, and qualified in its entirety by reference to, the Articles Supplementary of the Company with respect to each series of Outstanding MRP Shares. Capitalized terms used but not defined in this description of the preferred stock have the meanings given them in the respective Articles Supplementary.

<u><u>Dividends and Dividend Periods</u></u>

*General.&nbsp;&nbsp;&nbsp;&nbsp;*Holders of Outstanding MRP Shares are entitled to receive cash dividends when, as, and if declared on each Dividend Payment Date with respect to a Dividend Period at a Dividend Rate equal to the Applicable Rate (or the Default Rate) for each Dividend Period. The Applicable Rate is computed on the basis of two 180-day semi-annual periods with respect to Series F MRP Shares, Series G MRP Shares, Series I MRP Shares and Series J MRP Shares of the Company and four 90-day quarterly periods with respect to Series H MRP Shares of the Company. Dividends so declared and payable shall be paid to the extent permitted under Maryland law and to the extent available and in preference to and with priority over any distribution declared and payable on our common stock.

*Fixed Dividend Rate.&nbsp;&nbsp;&nbsp;&nbsp;*The Applicable Rate is an annual rate of 2.67% with respect to Series F MRP Shares, 5.96% with respect to Series G MRP Shares, 4.07% with respect to Series H MRP Shares, 2.90% with respect to Series I MRP Shares and 5.29% with respect to Series J MRP Shares.

*Payment of Dividends and Dividend Periods.&nbsp;&nbsp;&nbsp;&nbsp;*Dividends on Outstanding MRP Shares will be payable semi-annually, except for dividends on Series H MRP Shares, which will be payable quarterly. Dividends will be paid on the first Business Day following the last day of the Dividend Period and upon any redemption of the Outstanding MRP Shares (each payment date a "Dividend Payment Date"). Dividends with respect to any Dividend Period will be declared and paid to holders of record of Outstanding MRP Shares as their names shall appear on our books and records at the close of business on the 5<sup>th</sup> day prior to the end of such Dividend Period (or if such day is not a Business Day, the next preceding Business Day). Dividends payable on any Outstanding MRP Shares (except for Series H MRP Shares) for any period of less than a full Dividend Period, including upon any redemption of such shares on any redemption date other than on a Dividend Payment Date, will be computed on the basis of two 180-day semi-annual periods and the actual number of days elapsed for any such period of less than one semi-annual period. Dividends payable on the Series H MRP Shares for any period of less than a full Dividend Period, including upon any redemption of such shares on any redemption date other than a Dividend Payment Date, will be computed by multiplying the Applicable Rate for such period by a fraction, the numerator of which shall be the actual number of days in such period and the denominator of which shall be 360, multiplying the amount so obtained by the liquidation preference.

We do not intend to establish any reserves for the payment of dividends. Dividends that are in arrears for any past Dividend Period may be declared and paid at any time, without reference to any regular Dividend Payment Date. Such payments are made to holders of Outstanding MRP Shares as their names appear on our books and records on a date not exceeding 5 calendar days preceding the payment date thereof, as may be fixed by the Board.

*Adjustment to Fixed Dividend Rate — Ratings.&nbsp;&nbsp;&nbsp;&nbsp;*So long as Outstanding MRP Shares are rated on any date no less than "A" by Fitch (and no less than an equivalent of such rating by any other NRSRO), then the Dividend Rate will be equal to the Applicable Rate. If the lowest credit rating assigned on any date to Outstanding MRP Shares by Fitch or any other NRSRO is equal to one of the ratings set forth in the table below, the Dividend Rate applicable to such Outstanding MRP Shares for such date will be adjusted by adding the respective enhanced dividend amount (which shall not be cumulative) set forth opposite such rating (or the equivalent from any other NRSRO) to the Applicable Rate.

#### Dividend Rate Adjustment Schedule

---

| | |
|:---|:---|
|  **Fitch Rating** | **Enhanced Dividend Amount** |
|  "A-" | 0.5% |
|  "BBB+" to "BBB-" | 2.0% |
|  "BB+" or below | 4.0% |

---

We will at all times use our reasonable best efforts to cause at least one NRSRO to maintain a current rating on the Outstanding MRP Shares. If no NRSRO is rating Outstanding MRP Shares, the Dividend Rate applicable to the Outstanding MRP Shares for such date will be a rate equal to the Applicable Rate plus 4.0%, unless the Dividend Rate is the Default Rate, in which case the Dividend Rate shall remain the Default Rate.

The Board has the right to terminate the designation of Fitch as a rating agency for purposes of the Outstanding MRP Shares. In such event, any rating of Fitch will be disregarded. If an NRSRO replaces any credit rating used in the determination of the Dividend Rate with a replacement credit rating, references to the replaced credit rating will thereafter refer to the replacement credit rating. No adjustment to the Dividend Rate will result in the Dividend Rate being less than the Applicable Rate.

*Default Rate — Default Period.&nbsp;&nbsp;&nbsp;&nbsp;*The Dividend Rate will be the Default Rate in the following circumstances. Subject to the cure provisions below, a "Default Period" with respect to Outstanding MRP Shares will commence on a date we fail to pay (i) the full amount of any dividends on the Outstanding MRP Shares payable on the Dividend Payment Date (a "Dividend Default") or (ii) the full amount of any redemption price payable on such Redemption Date (a "Redemption Default" and, together with a Dividend Default, hereinafter referred to as a "Default").

Subject to the cure provisions in the next paragraph below, a Default Period with respect to a Dividend Default or a Redemption Default shall end on the Business Day on which, by 12:00 noon, New York City time, an amount equal to all accumulated but unpaid dividends (whether or not earned or declared) and any unpaid redemption price shall have been directly paid. In the case of a Dividend Default, the Dividend Rate for each day during the Default Period will be equal to the Default Rate. The "Default Rate" for any calendar day shall be equal to the Applicable Rate in effect on such day plus five percent (5%) per annum.

No Default Period with respect to a Dividend Default or Redemption Default (if such default is not solely due to the willful failure of the Company) will be deemed to commence if the amount of any dividend or any redemption price due is paid within three Business Days after the applicable Dividend Payment Date or Redemption Date, together with an amount equal to the Default Rate applied to the amount and period of such non-payment based on the number of days comprising such period divided by 360.

<u><u>Redemption</u></u>

*Term Redemption.&nbsp;&nbsp;&nbsp;&nbsp;*We will be required to provide for the mandatory redemption of all of the Series F MRP Shares on December 17, 2026, all of the Series G MRP Shares on December 18, 2029, all of the Series H MRP Shares on December 13, 2027, all of the Series I MRP Shares on December 17, 2027 and all of the Series J MRP Shares on August 21, 2030 (each, a "Term Redemption Date"), at a redemption price equal to the liquidation preference per share, plus accumulated but unpaid dividends thereon (whether or not earned or declared but excluding interest thereon) to (but excluding) the Term Redemption Date (the "Redemption Price").

*Optional Redemption.&nbsp;&nbsp;&nbsp;&nbsp;*To the extent permitted under the 1940 Act and Maryland law, we may, at our option, redeem Outstanding MRP Shares, in whole or in part, out of funds legally available therefor, at any time and from time to time upon not less than 20 days nor more than 60 (with respect to Series H MRP Shares) or 180 (with respect to Series F MRP Shares, Series G MRP Shares, Series I MRP Shares and Series J MRP Shares) calendar days' prior notice for the Redemption Price plus with respect to each share, an amount (not less than zero) equal to the excess, if any, of the amount obtained by discounting all remaining scheduled payments with respect to the liquidation preference over the liquidation preference (the "Make-Whole Amount"); provided that we may, at our option, redeem the Outstanding MRP Shares within 60 days prior to the respective Term Redemption Date for the Redemption Price. This optional redemption is not available unless on the date on which we intend to give such notice and on the date of redemption, we satisfy Fitch's maintenance amount requirements ("MRP Shares Basic Maintenance Amount"), and the MRP Shares Asset Coverage is greater than or equal to 225% immediately subsequent to such redemption.

In addition to the foregoing, if the MRP Shares Asset Coverage is greater than 225%, but less than or equal to 235% for any five Business Days within a ten-Business Day period, determined on the basis of values calculated as of a time within 48 hours (not including Sundays or holidays) next preceding the time of such determination within the ten-Business Day period, we, upon not less than 12 days nor more than 40 days' notice as provided below, may redeem the Outstanding MRP Shares at the Redemption Price plus a redemption amount equal to 2% of the liquidation preference per share. The amount of Outstanding MRP Shares that may be redeemed pursuant to the foregoing may not exceed an amount of Outstanding MRP Shares which would result in a MRP Shares Asset Coverage of more than 250% pro forma for such redemption, determined on the basis of values calculated as of a time within 48 hours (not including Sundays or holidays) next preceding the time of such determination.

We may not effect any optional redemption unless on the date of such notice and on the date fixed for the redemption, we would satisfy the Outstanding MRP Shares Basic Maintenance Amount and Effective Leverage Ratio Requirement immediately subsequent to such redemption, if such redemption were to occur on such date.

We also reserve the right to repurchase Outstanding MRP Shares in market or other transactions from time to time in accordance with applicable law and at a price that may be more or less than the liquidation preference of the Outstanding MRP Shares, but we are under no obligation to do so.

*Mandatory Redemption.&nbsp;&nbsp;&nbsp;&nbsp;*If, while any Outstanding MRP Shares are outstanding, we fail to satisfy the Outstanding MRP Shares Asset Coverage as of the last day of any month or the Outstanding MRP Shares Basic Maintenance Amount as of any Friday (or the next preceding Business Day), and such failure is not cured as of the close of business on the date that is 30 days after such date (a "Cure Date"), the Outstanding MRP Shares will be subject to mandatory redemption out of funds legally available therefor at the Redemption Price plus a redemption amount equal to 1% of the liquidation preference per share.

The number of Outstanding MRP Shares to be redeemed in such circumstances will be equal to the product of (A) the quotient of the number of outstanding Outstanding MRP Shares divided by the aggregate number of outstanding preferred shares of the Company which have an asset coverage test greater than or equal to 225% times (B) the minimum number of outstanding preferred shares of the Company the redemption of which would result in the Company satisfying the MRP Shares Asset Coverage and MRP Shares Basic Maintenance Amount as of the Cure Date (provided that, if there is no such number of Outstanding MRP Shares the redemption of which would have such result, the Company shall redeem all outstanding Outstanding MRP Shares).

We will allocate the number of shares required to be redeemed to satisfy the Outstanding MRP Shares Asset Coverage or Outstanding MRP Shares Basic Maintenance Amount, as the case may be, pro rata among the holders of Outstanding MRP Shares in proportion to the number of shares they hold.

We are required to effect such a mandatory redemption not later than 40 days after the cure date (the "Mandatory Redemption Date"), except that if we do not have funds legally available for the redemption of, or are not otherwise permitted to redeem pursuant to applicable law or the terms of any existing leverage, all of the required number of Outstanding MRP Shares of a series that are subject to mandatory redemption, or we otherwise are unable to effect such redemption on or prior to such Mandatory Redemption Date, we will redeem those Outstanding MRP Shares on the earliest practicable date on which we will have such funds available or are otherwise permitted to redeem such shares, upon notice to record owners of Outstanding MRP Shares to be redeemed. Our ability to make a mandatory redemption may be limited by the provisions of the 1940 Act or Maryland law.

<u><u>Voting Rights</u></u>

Except as otherwise provided in the Company's Charter and Bylaws or as otherwise required by applicable law, (1) each holder of Outstanding MRP Shares will be entitled to one vote for each Outstanding MRP Share held on each matter submitted to a vote of stockholders of the Company, and (2) the holders of Outstanding MRP Shares, along with holders of other outstanding preferred shares of the Company, will vote together with holders of Company common stock as a single class; provided, however, that holders of preferred shares, including the Outstanding MRP Shares, are entitled as a class to elect two members of the Board at all times.

The Company may not amend, alter or repeal any right, preference or power of a series of Outstanding MRP Shares, or amend the Company's Charter or Bylaws, so as to materially and adversely affect any preference, right or power of such series or the holders thereof, without obtaining the affirmative vote of the holders of a majority of the outstanding of such series of Outstanding MRP Shares, and shall be required to obtain the separate affirmative vote of holders of a majority of any affected series of Outstanding MRP Shares in the event of any matter or action that would materially and adversely affect the rights, preference or powers of such series in a manner different from that of other series or class of Company capital stock. In addition, holders of Outstanding MRP Shares of each series will have certain other voting rights under the applicable Articles Supplementary, together with holders of any other outstanding series of the Company's preferred shares, with respect to certain actions that may affect their investment in the Company. Holders of Outstanding MRP Shares also will be entitled to vote as a class with holders of other preferred shares of the Company on matters that relate to certain plans of reorganization adversely affecting holders of the preferred shares or any other action requiring a vote of security holders of the Company under Section 13(a) of the 1940 Act.

Holders of the Outstanding MRP Shares will be entitled to elect additional directors constituting, when added to the two directors elected exclusively by the holders of preferred shares, a majority of the directors, in the event at least two full years of accumulated dividends are due and unpaid, or at any time holders of preferred shares are entitled under the 1940 Act to elect a majority of the directors of the Company.

#### D ebt S ecurities
*General.&nbsp;&nbsp;&nbsp;&nbsp;*Under Maryland law and our Charter, we may borrow money, without prior approval of holders of common and preferred stock to the extent permitted by our investment restrictions and the 1940 Act. We may issue debt securities, including additional notes, or other evidence of indebtedness (including bank borrowings or commercial paper) and may secure any such notes or borrowings by mortgaging, pledging or otherwise subjecting as security our assets to the extent permitted by the 1940 Act or rating agency guidelines. Any borrowings or debt securities will rank senior to the preferred stock and the common stock.

Under the 1940 Act, we may only issue one class of senior securities representing indebtedness, which in the aggregate, may represent no more than 33 1/3% of our total assets. So long as our current notes are outstanding, additional debt securities must rank on parity with such indebtedness with respect to the payment of interest and upon the distribution of our assets.

*Limitations.&nbsp;&nbsp;&nbsp;&nbsp;*Under the requirements of the 1940 Act, immediately after issuing any senior securities representing indebtedness, we must have an asset coverage of at least 300%. Asset coverage means the ratio which the value of our total assets, less all liabilities and indebtedness not represented by senior securities, bears to the aggregate amount of senior securities representing indebtedness. We currently are subject to certain restrictions imposed by guidelines of one or more rating agencies that have issued ratings for outstanding notes, including restrictions related to asset coverage and portfolio composition. Such restrictions may be more stringent than those imposed by the 1940 Act. Other types of borrowings also may result in our being subject to similar covenants in credit agreements.

*Liquidation Rights.&nbsp;&nbsp;&nbsp;&nbsp;*In the event of (a) any insolvency or bankruptcy case or proceeding, or any receivership, liquidation, reorganization or other similar case or proceeding in connection therewith, relative to us or to our creditors, as such, or to our assets, or (b) any liquidation, dissolution or other winding up of the Company, whether voluntary or involuntary and whether or not involving insolvency or bankruptcy, or (c) any assignment for the benefit of creditors or any other marshalling of assets and liabilities of ours, then (after any payments with respect to any secured creditor of ours outstanding at such time) and in any such event the holders of debt securities shall

be entitled to receive payment in full of all amounts due or to become due on or in respect of all debt securities (including any interest accruing thereon after the commencement of any such case or proceeding), or provision shall be made for such payment in cash or cash equivalents or otherwise in a manner satisfactory to the holders of the debt securities, before the holders of any of our common or preferred stock are entitled to receive any payment on account of any redemption proceeds, liquidation preference or distributions from such shares. The holders of debt securities shall be entitled to receive, for application to the payment thereof, any payment or distribution of any kind or character, whether in cash, property or securities, including any such payment or distribution which may be payable or deliverable by reason of the payment of any other indebtedness of ours being subordinated to the payment of the debt securities, which may be payable or deliverable in respect of the debt securities in any such case, proceeding, dissolution, liquidation or other winding up event.

Unsecured creditors of ours may include, without limitation, service providers including the Adviser, custodian, administrator, broker-dealers and the trustee, pursuant to the terms of various contracts with us. Secured creditors of ours may include without limitation parties entering into any interest rate swap, floor or cap transactions, or other similar transactions with us that create liens, pledges, charges, security interests, security agreements or other encumbrances on our assets.

A consolidation, reorganization or merger of the Company with or into any other company, or a sale, lease or exchange of all or substantially all of our assets in consideration for the issuance of equity securities of another company shall not be deemed to be a liquidation, dissolution or winding up of the Company.

*Voting Rights.&nbsp;&nbsp;&nbsp;&nbsp;*Debt securities have no voting rights, except to the extent required by law or as otherwise provided in the documents governing such instruments relating to the acceleration of maturity upon the occurrence and continuance of an event of default. In connection with any other borrowings (if any), the 1940 Act does in certain circumstances grant to the lenders certain voting rights in the event of default in the payment of interest on or repayment of principal.

#### Certain Provisions in the Company's Charter and Bylaws
The following description of certain provisions of the Charter and Bylaws is only a summary. For a complete description, please refer to the Charter and Bylaws, which have been filed as exhibits to our registration statement on Form N-2, of which this Prospectus forms a part.

The following description of certain provisions of our Charter and Bylaws is only a summary. The Charter and Bylaws include provisions that could delay, defer or prevent other entities or persons from acquiring control of us, causing us to engage in certain transactions or modifying our structure. Further, these provisions can have the effect of depriving stockholders of the opportunity to sell their shares at a premium over prevailing market prices by discouraging third parties from seeking to obtain control of us. These provisions, all of which are summarized below, may be regarded as "anti-takeover" provisions.

#### Classification of the Board of Directors; Election of Directors
The Charter provides that the number of directors may be established only by the Board pursuant to the Bylaws but may not be less than one. The Bylaws provide that the number of directors may not be greater than nine. Subject to any applicable limitations of the 1940 Act and except as may be provided by the Board in setting the terms of any class or series of preferred stock, any vacancy may be filled only by a majority of the remaining directors, even if those remaining directors do not constitute a quorum. Pursuant to the Charter, the Board is divided into three classes: Class I, Class II and Class III. Upon the expiration of their current terms, which expire in 2026 for the Class I directors, 2027 for the Class II directors and 2028 for the Class III directors, directors of each class will be elected to serve for three-year terms and until their successors are duly elected and qualify. Each year only one class of directors will be elected by the stockholders. The classification of the Board should help to ensure the continuity and stability of the strategies and policies determined by the Board.

The classified board provision could have the effect of making the replacement of incumbent directors more time-consuming and difficult. At least two annual meetings of stockholders, instead of one, will generally be required to effect a change in a majority of the Board. Thus, the classified board provision could increase the likelihood that incumbent directors will retain their positions. The staggered terms of directors may delay, defer, or prevent a change in control of the Board, even though a change in control might be in the best interests of the stockholders.

#### Removal of Directors

#### Approval of Extraordinary Corporate Actions; Amendment of Charter and Bylaws
Under Maryland law, a Maryland corporation generally cannot dissolve, amend its charter, merge, sell all or substantially all of its assets, engage in a statutory share exchange or engage in similar transactions outside the ordinary course of business, unless declared advisable by the Board and approved by the affirmative vote of stockholders entitled to cast at least two-thirds of the votes entitled to be cast on the matter. However, a Maryland corporation may provide in its charter for stockholder approval of these matters by a lesser percentage, but not less than a majority of all of the votes entitled to be cast on the matter. Our Charter generally provides for approval of Charter amendments and extraordinary transactions by stockholders entitled to cast a majority of the votes entitled to be cast on the matter. Our Charter also provides that certain Charter amendments and any proposal for our conversion, whether by merger or otherwise, from a closed-end company to an open-end company or any proposal for our liquidation or dissolution require the approval of stockholders entitled to cast at least 80 percent of the votes entitled to be cast on such matter. However, if such amendment or proposal is approved by at least two-thirds of our continuing directors (in addition to the approval by our Board otherwise required), such amendment or proposal may be approved by stockholders entitled to cast a majority of the votes entitled to be cast on such a matter.

The "continuing directors" are defined in our Charter as the directors named in our Charter as well as those directors whose nomination for election by the stockholders or whose election by the directors to fill vacancies is approved by a majority of the continuing directors then on the Board.

Our Bylaws provide that the Board has the exclusive power to adopt, alter, or repeal any provision of our Bylaws and to make new Bylaws.

#### Advance Notice of Director Nominations and New Business
The Bylaws provide that with respect to an annual meeting of stockholders, nominations of persons for election to the Board and the proposal of business to be considered by stockholders may be made only (1) pursuant to notice of the meeting, (2) by or at the direction of the Board or (3) by any one or more stockholders who have each continuously owned shares of stock of the Company entitled to vote in the election of directors or a proposal of other business for at least three years as of the date of the giving of notice as provided in the Bylaws, the record date for determining the stockholders entitled to vote at the meeting and the time of the annual meeting, with the aggregate shares owned by such stockholder or stockholders as of each such dates and during such three-year period representing at least one percent of the Company's shares of stock and who has or have complied with the advance notice procedures of the Bylaws. With respect to special meetings of stockholders, only the business specified in the Company's notice of the meeting may be brought before the meeting. Nominations of persons for election to the Board at a special meeting may be made only (1) pursuant to notice of the meeting by the Company, (2) by or at the direction of the Board, or (3) provided that the Board has determined that Directors will be elected at the meeting, by a stockholder who was a stockholder of record at the time of the giving of notice and at the time of the meeting, who is entitled to vote at the meeting and who has complied with the advance notice provisions of the Bylaws.

#### Plan of Distribution
The Company may offer and sell Securities from time to time on an immediate, continuous or delayed basis, in one or more offerings under this Prospectus and a related Prospectus Supplement, on terms to be determined at the time of the offering. The Company may offer and sell such Securities directly to one or more purchasers, to or through underwriters, through dealers or agents that the Company designates from time to time, or through a combination of these methods. Sales of Securities may be made in transactions that are deemed to be "at the market" as defined in Rule 415 under the Securities Act of 1933, as amended (the "1933 Act"), including sales made directly on the NYSE or sales made to or through a market maker other than on an exchange.

The Prospectus Supplement relating to any offering of Securities will describe the terms of such offering, including, as applicable:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the names of any agents, underwriters or dealers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any sales loads, underwriting discounts and commissions or agency fees and other items constituting underwriters' or agents' compensation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any discounts, commissions, fees or concessions allowed or reallowed or paid to dealers or agents;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the public offering or purchase price of the offered Securities, the estimated net proceeds the Company will receive from the sale and the use of proceeds; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any securities exchange on which the offered Securities may be listed.

The Prospectus Supplement relating to any Rights offering will set forth the number of Common Shares issuable upon the exercise of each Right (or number of Rights) and the other terms of such Rights offering.

#### Direct Sales
The Company may offer and sell Securities directly to, and solicit offers from, institutional investors or others who may be deemed to be underwriters as defined in the 1933 Act for any resales of Securities. In this case, no underwriters or agents would be involved. The Company may use electronic media, including the Internet, to sell offered Securities directly. The Company will describe the terms of any of those sales in a Prospectus Supplement.

#### By Agents
The Company may offer and sell Securities through an agent or agents designated by the Company from time to time. An agent may sell Securities it has purchased from the Company as principal to other dealers for resale to investors and other purchasers and may reallow all or any portion of the discount received in connection with the purchase from the Company to the dealers. After the initial offering of Securities, the offering price (in the case of Securities to be resold at a fixed offering price), the concession and the discount may be changed.

#### By Underwriters
If any underwriters are involved in the offer and sale of Securities, such Securities will be acquired by the underwriters and may be resold by them, either at a fixed public offering price established at the time of offering or from time to time in one or more negotiated transactions or otherwise, at prices related to prevailing market prices determined at the time of sale. Unless otherwise set forth in the applicable Prospectus Supplement, the obligations of the underwriters to purchase Securities will be subject to conditions precedent and the underwriters will be obligated to purchase all Securities described in the Prospectus Supplement if any are purchased. Any initial public offering price and any discounts or concessions allowed or re-allowed or paid to underwriters may be changed from time to time.

In connection with an offering of Common Shares, if a Prospectus Supplement so indicates, the Company may grant the underwriters an option to purchase additional Common Shares at the public offering price, less the underwriting discounts and commissions, within 45 days from the date of the Prospectus Supplement, to cover any overallotments.

#### By Dealers
The Company may offer and sell Securities from time to time through one or more dealers who would purchase the securities as principal. The dealers then may resell the offered Securities to the public at fixed or varying prices to be determined by those dealers at the time of resale. The Company will set forth the names of the dealers and the terms of the transaction in the Prospectus Supplement.

#### General Information
Any underwriters, dealer or agent participating in an offering of Securities may be deemed to be an "underwriter," as that term is defined in the 1933 Act, of Securities so offered and sold, and any discounts and commission received by them, and any profit realized by them on resale of the offered Securities for whom they act as agent, may be deemed to be underwriting discounts and commissions under the 1933 Act.

Underwriters, dealers and agents may be entitled, under agreements entered into with the Company, to indemnification by the Company against some liabilities, including liabilities under the 1933 Act.

The Company may offer to sell Securities either at a fixed price or at prices that may vary, at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices.

To facilitate an offering of Common Shares in an underwritten transaction and in accordance with industry practice, the underwriters may engage in transactions that stabilize, maintain, or otherwise affect the market price of the Common Shares or any other Security. Those transactions may include overallotment, entering stabilizing bids, effecting syndicate covering transactions, and reclaiming selling concessions allowed to an underwriter or a dealer.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;An overallotment in connection with an offering creates a short position in the Common Shares for the underwriter's own account.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;An underwriter may place a stabilizing bid to purchase the Common Shares for the purpose of pegging, fixing, or maintaining the price of the Common Shares.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Underwriters may engage in syndicate covering transactions to cover overallotments or to stabilize the price of the Common Shares by bidding for, and purchasing, the Common Shares or any other Securities in the open market in order to reduce a short position created in connection with the offering.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The managing underwriter may impose a penalty bid on a syndicate member to reclaim a selling concession in connection with an offering when the Common Shares originally sold by the syndicate member are purchased in syndicate covering transactions or otherwise.

Any of these activities may stabilize or maintain the market price of the Securities above independent market levels. Underwriters are not required to engage in these activities and may end any of these activities at any time.

In connection with any Rights offering, the Company may also enter into a standby underwriting arrangement with one or more underwriters pursuant to which the underwriter(s) will purchase Common Shares remaining unsubscribed for after the Rights offering.

Unless otherwise indicated in the prospectus supplement, each series of offered preferred shares will be a new issue of securities for which there currently is no market. Any underwriters to whom preferred shares are sold for public offering and sale may make a market in such preferred shares as permitted by applicable laws and regulations, but such underwriters will not be obligated to do so, and any such market making may be discontinued at any time without notice. Accordingly, there can be no assurance as to the development or liquidity of any market for the preferred shares.

Underwriters, agents and dealers may engage in transactions with or perform services, including various investment banking and other services, for the Company and/or any of the Company's affiliates in the ordinary course of business.

The maximum amount of compensation to be received by any Financial Industry Regulatory Authority ("FINRA") member or independent broker-dealer will not exceed the applicable FINRA limit for the sale of any securities being offered pursuant to Rule 415 under the Securities Act. We will not pay any compensation to any underwriter or agent in the form of warrants, options, consulting or structuring fees or similar arrangements.

To the extent permitted under the 1940 Act and the rules and regulations promulgated thereunder, the underwriters may from time to time act as a broker or dealer and receive fees in connection with the execution of the Company's portfolio transactions after the underwriters have ceased to be underwriters and, subject to certain restrictions, each may act as a broker while it is an underwriter.

A prospectus and accompanying prospectus supplement in electronic form may be made available on the websites maintained by underwriters. The underwriters may agree to allocate a number of Securities for sale to their online brokerage account holders. Such allocations of Securities for Internet distributions will be made on the same basis as other allocations. In addition, Securities may be sold by the underwriters to securities dealers who resell Securities to online brokerage account holders.

#### Administrator and Custodian
U.S. Bancorp Fund Services, LLC, 615 East Michigan Street, Milwaukee, Wisconsin 53202, serves as our administrator and provides certain back-office support such as payment of expenses and preparation of financial statements and related schedules. We pay the administrator a monthly fee computed at an annual rate of 0.03% of the first $1,000,000,000 of the Company's Managed Assets, 0.01% on the next $500,000,000 of Managed Assets and 0.005% on the balance of the Company's Managed Assets. For the fiscal years ended November 30, 2023, November 30, 2024, and November 30, 2025, we paid U.S. Bancorp Fund Services, LLC $236,284, $222,850, and $306,151 respectively, for administrative services.

U.S. Bank, N.A., 1555 North Rivercenter Drive, Suite 302, Milwaukee, Wisconsin 53212 serves as the custodian of our cash and investment securities. We pay the custodian a monthly fee computed at an annual rate of 0.004% of the Company's U.S. Dollar-denominated assets and 0.015% of the Company's Canadian Dollar-denominated assets, plus portfolio transaction fees.

#### Legal Matters
Vedder Price P.C. ("Vedder"), Chicago, Illinois, serves as our counsel with respect to this offering. Certain matters of Maryland law in connection with the securities offered hereby will be passed upon for us by Venable LLP, Baltimore, Maryland. If certain legal matters in connection with an offering of securities are passed upon by counsel for the placement agents or underwriters of such offering, such counsel to the placement agents or underwriters will be named in a Prospectus Supplement.

#### Available Information
We are subject to the informational requirements of the Exchange Act and the 1940 Act and are required to file reports, including annual and semi-annual reports, proxy statements and other information with the SEC. We voluntarily file quarterly shareholder reports. Our most recent annual shareholder report filed with the SEC is for our fiscal year ended November 30, 2025. These documents are available on the SEC's EDGAR.

This Prospectus does not contain all of the information in our registration statement, including amendments, exhibits, and schedules. Statements in this Prospectus about the contents of any contract or other document are not necessarily complete and in each instance reference is made to the copy of the contract or other document filed as an exhibit to the registration statement, each such statement being qualified in all respects by this reference.

Additional information about us can be found in our Registration Statement (including amendments, exhibits, and schedules) on Form N-2 filed with the SEC. The SEC maintains a web site (*http://www.sec.gov*) that contains our Registration Statement, other documents incorporated by reference, and other information we have filed electronically with the SEC, including proxy statements and reports filed under the Exchange Act.

#### Incorporation by Reference
The documents listed below, and any reports and other documents subsequently filed with the SEC pursuant to Section 30(b)(2) of the 1940 Act and Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the termination of the offering will be incorporated by reference into this Prospectus and deemed to be part of this Prospectus from the date of the filing of such reports and documents:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our SAI, dated May 8, 2026, filed with the Prospectus;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our Annual Report on [Form N-CSR](https://www.sec.gov/Archives/edgar/data/1268533/000121390026013154/ea0272590-01_ncsr.htm), filed with the SEC on February 6, 2026, which includes the Financial Highlights for the fiscal years ended November 30, 2025, 2024, 2023, 2022 and 2021;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our Annual Report on [Form N-CSR](https://www.sec.gov/Archives/edgar/data/1268533/000120677421000312/tyg3863772-ncsr.htm), filed with the Commission on February 5, 2021, which includes Financial Highlights for the fiscal years ending November 30, 2020, 2019, 2018, 2017 and 2016;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our definitive Proxy Statement on [Schedule 14A](https://www.sec.gov/Archives/edgar/data/1268533/000139834425012957/fp0094184-3_def14a.htm) for our 2025 Annual Meeting of Stockholders filed with the SEC on July 10, 2025; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Our Description of Common Stock on [Form 8-A](https://www.sec.gov/Archives/edgar/data/1268533/000092290704000077/form8a_021604.htm), filed with the SEC on February 18, 2004.

The information incorporated by reference is considered to be part of this Prospectus, and later information that the Company files with the SEC will automatically update and supersede this information. You should not assume that the information in this Prospectus or in the documents incorporated by reference is accurate as of any date other than the date on the front of this Prospectus or those documents. Incorporated materials not delivered with the Prospectus may be obtained, without charge or by calling toll-free at 1-866-362-9331, by writing us at 5901 College Boulevard, Suite 400, Overland Park, Kansas 66211. Our annual and semi-annual reports and the statement of additional information also are available on our investment adviser's website at *www.tortoiseadvisors.com*.

All dealers that effect transactions in Common Shares, whether or not participating in this offering, may be required to deliver a Prospectus.

#### Tortoise Energy Infrastructure Corporation

#### Shares of Common Stock

#### Issuable Upon Exercise of Rights to Subscribe for Such Common Shares

#### ___________________________

#### PROSPECTUS SUPPLEMENT

#### ___________________________

#### May 20, 2026

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## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

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|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **N-2**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **TORTOISE ENERGY INFRASTRUCTURE CORP**  |

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| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Type**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Class Title**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Calculation or Carry Forward Rule**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount Registered**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Proposed Maximum Offering Price Per Unit**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Maximum Aggregate Offering Price**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Rate**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount of Registration Fee**  |
| **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** |
| Fees to be Paid | 1 | Equity | Common Shares $0.001 par value per share | Other | 7043198 | $47.09 | $331664194.00 | 0.0001381 | $45803.00 |
| Fees Previously Paid |  |  |  |  |  |  |  |  |  |
| **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** |
| Carry Forward Securities |  |  |  |  |  |  |  |  |  |
|  |  |  | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $331664194.00  |  | $45803.00  |
|  |  |  | Total Fees Previously Paid:  | Total Fees Previously Paid:  | Total Fees Previously Paid:  |  |  |  | $0.00  |
|  |  |  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
|  |  |  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $45803.00  |

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Offering Note** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>1</sup> The Registrant is relying upon Rule 457(c) under the Securities Act of 1933 ("Securities Act") to calculate the registration fee. The maximum aggregate offering price is estimated solely for purposes of determining the registration fee based on the average of the high and low sales prices of the shares of Common Shares, as reported by the New York Stock Exchange on May 15, 2026, in accordance with Rule 457(c) under the Securities Act. The proposed maximum offering price per security will be determined from time to time by the Registrant in connection with the sale by the Registrant of the securities registered under this Registration Statement. No separate consideration will be received by the Registrant. Any shares issued pursuant to an offering of rights to purchase common shares, including any shares issued pursuant to an over-subscription privilege or a secondary over subscription privilege, will be shares registered under this Registration Statement.

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|:---|
| |
| **Rules 457(b) and 0-11(a)(2)** |
| Fee Offset Claims |
| Fee Offset Sources |
| **Rule 457(p)** |
| Fee Offset Claims |
| Fee Offset Sources |

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