# EDGAR Filing Document

**Accession Number:** 0001268533
**File Stem:** 0001213900-26-010838
**Filing Date:** 2026-2
**Character Count:** 49299
**Document Hash:** 02223df0725c5192ef8631f98d10733a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-010838.hdr.sgml**: 20260202

**ACCESSION NUMBER**: 0001213900-26-010838

**CONFORMED SUBMISSION TYPE**: POS EX

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260202

**DATE AS OF CHANGE**: 20260202

**EFFECTIVENESS DATE**: 20260202

**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:** POS EX
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-288207
- **FILM NUMBER:** 26588831

**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

**As filed electronically with the Securities and Exchange Commission on February 2, 2026**

**Registration No. 333-288207**

**UNITED STATES<br> SECURITIES AND EXCHANGE COMMISSION**

**Washington, DC 20549**

**FORM N-14**

**REGISTRATION STATEMENT<br> UNDER<br> THE SECURITIES ACT OF 1933**

☐ Pre-Effective Amendment No. ☒ Post-Effective Amendment No. 1

**<u>TORTOISE ENERGY INFRASTRUCTURE CORPORATION</u>**

(Exact Name of Registrant as Specified in Charter)

**5901 College Boulevard, Suite 400<br> <u>Overland Park, Kansas 66211</u>**

(Address of Principal Executive Offices) (Zip Code)

**<u>(913) 981-1020</u>**

(Registrant's Area Code and Telephone Number)

**Matthew G.P. Sallee**

**Jeffrey S. Kruske**

**5901 College Boulevard, Suite 400<br> <u>Overland Park, Kansas 66211</u>**

(Name and Address of Agent for Service)

**With copies to:**

**Deborah Bielicke Eades**

**Vedder Price P.C.**

**222 N. LaSalle Street**

**Chicago, Illinois 60601**

**EXPLANATORY NOTE**

The Joint Proxy Statement/Prospectus and Statement of Additional Information, each in the form filed on August 12, 2025, pursuant to Rule 424 of the General Rules and Regulations under the Securities Act of 1933, as amended (File No. 333-288207), are incorporated herein by reference.

This amendment is being filed for the sole purpose of adding to Part C of the Registration Statement the executed tax opinion of Vedder Price P.C., supporting the tax matters discussed in the Joint Proxy Statement/Prospectus.

**PART C: OTHER INFORMATION**

**ITEM 15: INDEMNIFICATION**

Maryland law permits a Maryland corporation to include in its charter a provision limiting the liability of its directors and officers to the corporation and its stockholders for money damages except for liability resulting from (a) actual receipt of an improper benefit or profit in money, property or services or (b) active and deliberate dishonesty which is established by a final judgment as being material to the cause of action. The Registrant's charter contains such a provision which eliminates directors' and officers' liability to the maximum extent permitted by Maryland law.

The Registrant's charter authorizes it, to the maximum extent permitted by Maryland law and the Investment Company Act of 1940, as amended (the "1940 Act"), to indemnify any present or former director or officer or any individual who, while a director of the Registrant and at the request of the Registrant, serves or has served another corporation, real estate investment trust, partnership, joint venture, trust, employee benefit plan or other enterprise as a director, officer, partner or trustee, from and against any claim or liability to which that person may become subject or which that person may incur by reason of his or her status as a present or former director or officer of the Registrant and to pay or reimburse his or her reasonable expenses in advance of final disposition of a proceeding. The Registrant's Bylaws obligate it, to the maximum extent permitted by Maryland law and the 1940 Act, to indemnify any present or former director or officer or any individual who, while a director of the Registrant and at the request of the Registrant, serves or has served another corporation, real estate investment trust, partnership, joint venture, trust, employee benefit plan or other enterprise as a director, officer, partner or trustee and who is made a party to the proceeding by reason of his service in that capacity from and against any claim or liability to which that person may become subject or which that person may incur by reason of his or her status as a present or former director or officer of the Registrant and to pay or reimburse his or her reasonable expenses in advance of final disposition of a proceeding. The charter and Bylaws also permit the Registrant to indemnify and advance expenses to any person who served as a predecessor of the Registrant in any of the capacities described above and any employee or agent of the Registrant or a predecessor of the Registrant.

Maryland law requires a corporation (unless its charter provides otherwise, which the Registrant's charter does not) to indemnify a director or officer who has been successful, on the merits or otherwise, in the defense of any proceeding to which he is made a party by reason of his service in that capacity. Maryland law permits a corporation to indemnify its present and former directors and officers, among others, against judgments, penalties, fines, settlements and reasonable expenses actually incurred by them in connection with any proceeding to which they may be made a party by reason of their service in those or other capacities unless it is established that (a) the act or omission of the director or officer was material to the matter giving rise to the proceeding and (i) was committed in bad faith or (ii) was the result of active and deliberate dishonesty, (b) the director or officer actually received an improper personal benefit in money, property or services or (c) in the case of any criminal proceeding, the director or officer had reasonable cause to believe that the act or omission was unlawful. However, under Maryland law, a Maryland corporation may not indemnify for an adverse judgment in a suit by or in the right of the corporation or for a judgment of liability on the basis that personal benefit was improperly received, unless in either case a court orders indemnification and then only for expenses. In addition, Maryland law permits a corporation to advance reasonable expenses to a director or officer upon the corporation's receipt of (a) a written affirmation by the director or officer of his good faith belief that he has met the standard of conduct necessary for indemnification by the corporation and (b) a written undertaking by him or on his behalf to repay the amount paid or reimbursed by the corporation if it is ultimately determined that the standard of conduct was not met.

The provisions set forth above apply insofar as they are consistent with Section 17(h) of the 1940 Act, which prohibits indemnification of any director or officer of the Registrant against any liability to the Registrant or its stockholders to which such director or officer otherwise would be subject by reason of willful misfeasance, bad faith, gross negligence or reckless disregard of the duties involved in the conduct of his office.

Insofar as indemnification for liabilities arising under the Securities Act of 1933, as amended ("1933 Act"), may be provided to directors, officers and controlling persons of the Registrant, pursuant to the foregoing provisions or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the 1933 Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in connection with the successful defense of any action, suit or proceeding or payment pursuant to any insurance policy) is asserted against the Registrant by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the 1933 Act and will be governed by the final adjudication of such issue.

**ITEM 16: EXHIBITS**

The following exhibits are filed herewith as part of this Registration Statement, incorporated herein by reference or to be filed by pre-effective amendment.

(1) (a) [Articles of Amendment and Restatement dated February 25, 2004.](http://www.sec.gov/Archives/edgar/data/1268533/000095013404000887/c81634a1exv99wax2y.txt) <sup>(1)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(b) [Articles of Amendment dated November 30, 2012.](https://www.sec.gov/Archives/edgar/data/1268533/000119312512490558/d446285dex99a1.htm) <sup>(10)</sup>

(2) [Third Amended and Restated By-Laws of the Registrant dated December 20, 2023.](http://www.sec.gov/Archives/edgar/data/1268533/000114036123058694/ef20017011_ex3-1.htm) <sup>(29)</sup>

(3) Not applicable.

(4) Form of Agreement and Plan of Merger is filed as Appendix A to the Joint Proxy Statement/Prospectus constituting Part A of the Registration Statement.

(5) (a) [Form of Common Share Certificate.](https://www.sec.gov/Archives/edgar/data/1268533/000091384907000437/ex99-d1.htm) <sup>(5)</sup>

(6) (a) [Investment Management Agreement with Tortoise Capital Advisors, L.L.C.](https://www.sec.gov/Archives/edgar/data/1268533/000114036118011694/ex99_g1.htm) <sup>(22)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(b) [Fee Waiver Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000119312512176026/d330398dex99g3.htm) <sup>(9)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(c) [First Amendment to Fee Waiver Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000114036118011694/ex99_g3.htm) <sup>(22)</sup>

(7) (a) [Form of Underwriting Agreement relating to Common Stock.](https://www.sec.gov/Archives/edgar/data/1268533/000091384907000437/ex99-h1.htm) <sup>(5)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(b) [Form of Underwriting Agreement relating to Notes.](https://www.sec.gov/Archives/edgar/data/1268533/000091384907000437/ex99-h3.htm) <sup>(5)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(c) [Form of Purchase Agreement for Direct Placement of Common Stock.](https://www.sec.gov/Archives/edgar/data/1268533/000091384908000051/ex99-h4.htm) <sup>(6)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(d) [Form of Placement Agency Agreement for Direct Placement of Common Stock.](https://www.sec.gov/Archives/edgar/data/1268533/000091384908000051/ex99-h5.htm) <sup>(6)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(e) [Controlled Equity Offering Sales Agreement dated April 23, 2012.](https://www.sec.gov/Archives/edgar/data/1268533/000119312512176026/d330398dex99h7.htm) <sup>(9)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(f) [First Amendment to Controlled Equity Offering Sales Agreement dated November 27, 2013.](https://www.sec.gov/Archives/edgar/data/1268533/000119312513456369/d636232dex99h8.htm) <sup>(12)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(g) [Second Amendment to Controlled Equity Offering Sales Agreement dated October 1, 2015.](https://www.sec.gov/Archives/edgar/data/1268533/000119312515335088/d76825dex99h9.htm) <sup>(15)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(h) [Third Amendment to Controlled Equity Offering Sales Agreement dated October 16, 2015.](https://www.sec.gov/Archives/edgar/data/1268533/000119312515407118/d74907dex99h10.htm) <sup>(16)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(i) [Fourth Amendment to Controlled Equity Offering Sales Agreement dated May 19, 2016.](https://www.sec.gov/Archives/edgar/data/1268533/000114036116066346/ex99h_10.htm) <sup>(18)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(j) [Fifth Amendment to Controlled Equity Offering Sales Agreement dated December 12, 2017.](https://www.sec.gov/Archives/edgar/data/1268533/000114036117045934/ex99_h11.htm) <sup>(21)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(k) [Sixth Amendment to Controlled Equity Offering Sales Agreement dated April 27, 2018.](https://www.sec.gov/Archives/edgar/data/1268533/000114036118019967/ex99_h12.htm) <sup>(24)</sup>

(8) Not applicable.

(9) (a) [Custody Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000091384904000420/exj_061804.txt) <sup>(8)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(b) [First Amendment to Custody Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000095012311020498/c63276exv99wjw2.htm) <sup>(8)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(c) [Second Amendment to Custody Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000114036117033024/ex99_j3.htm) <sup>(20)</sup>

(10) Not applicable.

(11) [Opinion and Consent of Venable LLP](https://www.sec.gov/Archives/edgar/data/1268533/000121390025068911/ea025011201_ex99-11.htm) <sup>(30)</sup>

(12) [Opinion and Consent of Vedder Price P.C. supporting the tax matters discussed regarding the Merger in the Joint Proxy Statement/Prospectus.](ea027496001_ex99-12.htm) <sup>(\*)</sup>

(13) (a) [Stock Transfer Agency Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000091384904000420/exk-1_061804.txt) <sup>(2)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(b) [Fee and Service Schedule to Stock Transfer Agency Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k2.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(c) [First Addendum to Stock Transfer Agency Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k3.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(d) [Fund Administration Servicing Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000091384904000420/exk-2_061804.txt) <sup>(2)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(e) [First Amendment to Fund Administration Servicing Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000091384908000097/ex99-k3.htm) <sup>(7)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(f) [Second Amendment to Fund Administration Servicing Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000095012311020498/c63276exv99wkw6.htm) <sup>(8)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(g) [Fund Accounting Servicing Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000091384908000097/ex99-k4.htm) <sup>(7)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(h) [First Amendment to Fund Accounting Servicing Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000095012311020498/c63276exv99wkw4.htm) <sup>(8)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(i) [DTC Representation Letter relating to Preferred Stock and Notes.](http://www.sec.gov/Archives/edgar/data/1268533/000091384905000274/exk-6_032905.txt) <sup>(3)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(j) [Amended and Restated Credit Agreement with U.S. Bank.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k10.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(k) [First Amendment to U.S. Bank Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k11.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(l) [Second Amendment to U.S. Bank Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115029534/ex99_k12.htm) <sup>(14)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(m) [Third Amendment to U.S. Bank Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036117033024/ex99_k13.htm) <sup>(20)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(n) [Fourth Amendment to U.S. Bank Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036119011360/ex99_k14.htm) <sup>(26)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(o) [Fifth Amendment to U.S. Bank Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036119011360/ex99_k15.htm) <sup>(26)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(p) [Sixth Amendment to Amended and Restated Credit Agreement](https://www.sec.gov/Archives/edgar/data/1268533/000110465922104853/tm2226865d2_ex99b1vii.htm) . <sup>(27)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(q) [Seventh Amendment to Amended and restated Credit Agreement.](https://www.sec.gov/Archives/edgar/data/1268533/000117494723001173/sctoi_ex99b1viiitortenergy.htm) <sup>(28)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(r) [Credit Agreement with Bank of Nova Scotia.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k12.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(s) [First Amendment to Bank of Nova Scotia Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k13.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(t) [Second Amendment to Bank of Nova Scotia Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036116085671/ex99k_15.htm) <sup>(19)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(u) [Third Amendment to Bank of Nova Scotia Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036119006830/ex99_k17.htm) <sup>(25)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(v) [Fourth Amendment to Bank of Nova Scotia Credit Agreement.](http://www.sec.gov/Archives/edgar/data/1268533/000114036119006830/ex99_k18.htm) <sup>(25)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(w) [Second Amended and Restated Credit Agreement with U.S. Bank National Association](https://www.sec.gov/Archives/edgar/data/1268533/000117494723001173/sctoi_ex99b1ixtortenergy.htm) <sup>(28)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(x) [Note Purchase Agreement dated September 27, 2013.](http://www.sec.gov/Archives/edgar/data/1268533/000119312513418761/d620502dex99k23.htm) <sup>(11)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(y) [Note Purchase Agreement dated November 23, 2013.](http://www.sec.gov/Archives/edgar/data/1268533/000114036119006830/ex99_k20.htm) <sup>(25)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(z) [Assumption Agreement dated June 23, 2014.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k21.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(aa) [Note Purchase and Private Shelf Agreement dated December 18, 2014.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k23.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(bb) [Note Purchase Agreement dated April 2, 2015.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k24.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(cc) [Confirmation of Acceptance dated April 9, 2015.](http://www.sec.gov/Archives/edgar/data/1268533/000114036115016466/ex99_k25.htm) <sup>(13)</sup>

&nbsp;&nbsp;&nbsp;&nbsp;(dd) [Confirmation of Acceptance dated September 25, 2017.](http://www.sec.gov/Archives/edgar/data/1268533/000114036118011694/ex99_k26.htm) <sup>(22)</sup>

(14) (a) [Consent of Independent Registered Public Accounting Firm (Ernst and Young).](https://www.sec.gov/Archives/edgar/data/1268533/000121390025072025/ea025144301_ex99-14a.htm) <sup>(31)</sup>

(14) (b) [Consent of Independent Registered Public Accounting Firm (Tait & Weller).](https://www.sec.gov/Archives/edgar/data/1268533/000121390025068911/ea025011201_ex99-14b.htm) <sup>(30)</sup>

(15) Not applicable.

(16) (a) [Power of Attorney](https://www.sec.gov/Archives/edgar/data/1268533/000121390025056252/ea024508201_ex99-16.htm) <sup>(30)</sup>

(16) (b) [Power of Attorney](https://www.sec.gov/Archives/edgar/data/1268533/000121390025068911/ea025011201_ex99-16b.htm) <sup>(30)</sup>

(17) [Forms of Proxy Card.](https://www.sec.gov/Archives/edgar/data/1268533/000121390024094245/ea021964901_ex99-17.htm) <sup>(31)</sup>

(\*) Filed herewith.

(1) Incorporated by reference to Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on January 30, 2004 (File Nos. 333-110143 and 811-21462).

(2) Incorporated by reference to Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on June 28, 2004 (File Nos. 333-114545 and 811-21462).

(3) Incorporated by reference to Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on April 1, 2005 (File Nos. 333-122350 and 811-21462).

(4) Incorporated by reference to Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on March 6, 2007 (File Nos. 333-140457 and 811-21462).

(5) Incorporated by reference to Registrant's Registration Statement on Form N-2, filed on September 14, 2007 (File Nos. 333-146095 and 811-21462).

(6) Incorporated by reference to Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on January 25, 2008 (File Nos. 333-146095 and 811-21462).

(7) Incorporated by reference to Pre-Effective Amendment No. 2 to Registrant's Registration Statement on Form N-2, filed on February 12, 2008 (File Nos. 333-146095 and 811-21462).

(8) Incorporated by reference to Post-Effective Amendment No. 2 to Registrant's Registration Statement on Form N-2, filed on March 1, 2011 (File Nos. 333-165006 and 811-21462).

(9) Incorporated by reference to Post-Effective Amendment No. 7 to Registrant's Registration Statement on Form N-2, filed on April 23, 2012 (File Nos. 333-165006 and 811-21462).

(10) Incorporated by reference to Post-Effective Amendment No. 9 to Registrant's Registration Statement on Form N-2, filed on December 4, 2012 (File Nos. 333-165006 and 811-21462).

(11) Incorporated by reference to Post-Effective Amendment No. 14 to Registrant's Registration Statement on Form N-2, filed on October 30, 2013 (File Nos. 333-165006 and 811-21462).

(12) Incorporated by reference to Post-Effective Amendment No. 15 to Registrant's Registration Statement on Form N-2, filed on November 27, 2013 (File Nos. 333-165006 and 811-21462).

(13) Incorporated by reference to Post-Effective Amendment No. 18 to Registrant's Registration Statement on Form N-2, filed on April 27, 2015 (File Nos. 333-165006 and 811-21462).

(14) Incorporated by reference to Post-Effective Amendment No. 19 to Registrant's Registration Statement on Form N-2, filed on August 3, 2015 (File Nos. 333-165006 and 811-21462).

(15) Incorporated by reference to Post-Effective Amendment No. 21 to Registrant's Registration Statement on Form N-2, filed on October 1, 2015 (File Nos. 333-165006 and 811-21462).

(16) Incorporated by reference to Post-Effective Amendment No. 23 to Registrant's Registration Statement on Form N-2, filed on December 18, 2015 (File Nos. 333-165006 and 811-21462).

(17) Incorporated by reference to Registrant's Registration Statement on Form N-2, filed on March 4, 2016 (File Nos. 333-209946 and 811-21462).

(18) Incorporated by reference to the Post-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on May 19, 2016 (File Nos. 333-209946 and 811-21462).

(19) Incorporated by reference to the Post-Effective Amendment No. 2 to Registrant's Registration Statement on Form N-2, filed on November 10, 2016 (File Nos. 333-209946 and 811-21462).

(20) Incorporated by reference to the Post-Effective Amendment No. 6 to Registrant's Registration Statement on Form N-2, filed on August 22, 2017 (File Nos. 333-209946 and 811-21462).

(21) Incorporated by reference to the Post-Effective Amendment No. 7 to Registrant's Registration Statement on Form N-2, filed on December 12, 2017 (File Nos. 333-209946 and 811-21462).

(22) Incorporated by reference to the Post-Effective Amendment No. 8 to Registrant's Registration Statement on Form N-2, filed on March 2, 2018 (File Nos. 333-209946 and 811-21462).

(23) Incorporated by reference to the Post-Effective Amendment No. 9 to Registrant's Registration Statement on Form N-2, filed on April 18, 2018 (File Nos. 333-209946 and 811-21462).

(24) Incorporated by reference to the Post-Effective Amendment No. 10 to Registrant's Registration Statement on Form N-2, filed on April 27, 2018 (File Nos. 333-209946 and 811-21462).

(25) Incorporated by reference to Registration Statement on Form N-2, filed on April 9, 2019 (File Nos. 333-230789 and 811-21462).

(26) Incorporated by reference to the Pre-Effective Amendment No. 1 to Registrant's Registration Statement on Form N-2, filed on June 26, 2019 (File Nos. 333-230789 and 811-21462).

(27) Incorporated by reference to the Registrant's SC TO-I, filed on October 2, 2022 (File No. 005-85247).

(28) Incorporated by reference to the Registrant's SC TO-I, filed on October 2, 2023 (File No. 005-85247).

(29) Incorporated by reference to the Registrant's 8-K, filed on December 20, 2023 (File No. 811-21462).

(30) Incorporated by reference to Registrant's Pre-Effective Amendment No. 1 to the Registration Statement on Form N-14, filed on July 29, 2025 (File No. 333-288207).

(31) Incorporated by reference to the Registrant's Pre-Effective Amendment No. 2 to the Registration Statement on Form N-14, filed on August 5, 2025 (File No. 333-288207).

**ITEM 17: UNDERTAKINGS**

(1) The undersigned Registrant agrees that prior to any public reoffering of the securities registered through the use of a prospectus which is a part of this Registration Statement by any person or party who is deemed to be an underwriter within the meaning of Rule 145(c) of the Securities Act [17 CFR 230.145c], the reoffering prospectus will contain the information called for by the applicable registration form for reofferings by persons who may be deemed underwriters, in addition to the information called for by the other items of the applicable form.

(2) The undersigned Registrant agrees that every prospectus that is filed under paragraph (1) above will be filed as a part of an amendment to the Registration Statement and will not be used until the amendment is effective, and that, in determining any liability under the 1933 Act, each post-effective amendment shall be deemed to be a new registration statement for the securities offered therein, and the offering of the securities at that time shall be deemed to be the initial bona fide offering of them.

**SIGNATURES**

As required by the Securities Act of 1933, this Registration Statement has been signed on behalf of the Registrant, in the city of Overland Park and state of Kansas, on the 2nd day of February, 2026.

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| Tortoise ENERGY INFRASTRUCTURE CORPORATION | Tortoise ENERGY INFRASTRUCTURE CORPORATION |
| By: | /s/ Matthew G.P. Sallee |
|  | Matthew G.P. Sallee,<br> Chief Executive Officer |

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As required by the Securities Act of 1933, this Registration Statement has been signed by the following person in the capacity and on the date indicated:

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| | | |
|:---|:---|:---|
| **Signature** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Title** | **Date** |
| /s/ Matthew G.P. Sallee | Chief Executive Officer | February 2, 2026 |
| Matthew G.P. Sallee |  |  |
| /s/ Sean Wickliffe | Principal Financial Officer and Treasurer | February 2, 2026 |
| Sean Wickliffe | Principal Financial Officer and Treasurer |  |
| /s/ Conrad S. Ciccotello\* | Director | February 2, 2026 |
| Conrad S. Ciccotello |  |  |
| /s/ Carrie R. Schoffman\* | Director | February 2, 2026 |
| Carrie R. Schoffman |  |  |
| /s/ Alexandra A. Herger\* | Director | February 2, 2026 |
| Alexandra A. Herger |  |  |
| /s/ Tom Florence\* | Director | February 2, 2026 |
| Tom Florence |  |  |
| /s/ Jeffrey Kruske | Attorney-In-Fact | February 2, 2026 |
| Jeffrey Kruske |  |  |

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\* An original power of attorney authorizing, among others, Jeffrey Kruske to execute this post-effective amendment for certain of the Directors of the Registrant is incorporated by reference to Registrant's Pre-Effective Amendment No. 1 to the Registration Statement on Form N-14, filed on July 29, 2025 (File Nos. 811-21462 and 333-288207). An original power of attorney authorizing, among others, Jeffrey Kruske to execute this registration statement, and amendments thereto, for Carrie R. Schoffman is incorporated by reference to Registrant's Pre-Effective Amendment No. 2 to the Registration Statement on Form N-14, filed on August 5, 2025 (File Nos. 811-21462 abd 333-288207).

**EXHIBIT INDEX**

(12) [Opinion and Consent of Vedder Price P.C. supporting the tax matters discussed regarding the Merger in the Joint Proxy Statement/Prospectus.](ea027496001_ex99-12.htm)

## Ex-99.(12)

**Exhibit 12**

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| ![](ex99-12_001.jpg) | Chicago<br> New York<br> Washington, DC<br> London<br> San Francisco<br> Los Angeles<br> Singapore<br> Dallas<br> Miami<br> vedderprice.com |

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November 10, 2025

Tortoise Sustainable and Social Impact Term Fund

5901 College Boulevard, Suite 400

Overland Park, Kansas 66211

TYG Merger Sub II, LLC

5901 College Boulevard, Suite 400

Overland Park, Kansas 66211

Tortoise Energy Infrastructure Corporation<br> 5901 College Boulevard, Suite 400 <br> Overland Park, Kansas 66211

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|:---|:---|
| **Re:** | **Reorganization of Tortoise Sustainable and Social Impact Term Fund into Tortoise Energy Infrastructure Corporation** |

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Ladies and Gentlemen:

You have requested our opinion regarding certain U.S. federal income tax consequences of certain transactions undertaken pursuant to the Agreement and Plan of Merger, dated as of October 30, 2025 (the "Plan"), by and among Tortoise Sustainable and Social Impact Term Fund, a Maryland statutory trust (the "Target Fund"), Tortoise Energy Infrastructure Corporation, a Maryland corporation (the "Acquiring Fund"), and TYG Merger Sub II, LLC (the "Merger Sub"), a Maryland limited liability company and a direct, wholly-owned subsidiary of the Acquiring Fund. The Target Fund and the Acquiring Fund are each referred to herein as a "Fund" and collectively, as the "Funds."

The Plan contemplates that (i) the Target Fund will merge pursuant to applicable state law with and into Merger Sub with Merger Sub surviving (the "Merger") and all the common shares of the Target Fund will convert into outstanding shares of common stock, par value $0.001 per share, of the Acquiring Fund ("New Shares"), and (ii) as soon as practicable thereafter the Merger Sub will merge with and into the Acquiring Fund (the "Subsidiary Merger"), with the Acquiring Fund being the surviving entity in this subsidiary merger (collectively, the "Reorganization"). The New Shares will consist solely of newly issued shares of voting common stock, par value $0.001 per share, of the Acquiring Fund.

In rendering this opinion, we have examined the Plan and have reviewed and relied upon representations made to us by duly authorized officers of the Target Fund, the Acquiring Fund, and the Merger Sub, in letters dated November 10, 2025 (collectively, the "Representation Letters"). We have also examined such other agreements, documents, corporate records and other materials as we have deemed necessary in order for us to render the opinions referred to in this letter. In such review and examination, we have assumed the genuineness of all signatures, the legal capacity and authority of the parties who executed such documents, the authenticity of all documents submitted to us as originals, the conformity to originals of all documents submitted to us as copies and the authenticity of the originals of such latter documents.

222 North LaSalle Street \| Chicago, Illinois 60601 \| T +1 312 609 7500 \| F +1 312 609 5005

Vedder Price P.C. is affiliated with Vedder Price LLP, which operates in England and Wales, Vedder Price (CA), LLP, which operates in California, Vedder Price Pte. Ltd., which operates in Singapore, and Vedder Price (FL) LLP, which operates in Florida.

Tortoise Sustainable and Social Impact Term Fund

Tortoise Energy Infrastructure Corporation

TYG Merger Sub II, LLC

November 10, 2025

Our opinion is based, in part, on the assumptions that (i) the Reorganization described herein will occur in accordance with the terms of the Plan (without the waiver or modification of any terms or conditions thereof and without taking into account any amendment thereof that we have not approved) and the facts and representations set forth or referred to in this opinion letter, and that such facts and representations, as well as the facts and representations set forth in the Plan, are true, correct and complete as of the date hereof and will be true, correct and complete as of the date and time of the closing of the Merger of the Target Fund (as determined under the Plan) (the "Effective Time") through the date and time of the Subsidiary Merger, and (ii) any representation set forth in the Representation Letters qualified by knowledge, intention, belief, disclaimer of responsibility or any similar qualification is, and will be as of the Effective Time through the date and time of the Subsidiary Merger, true, correct and complete without such qualification. You have not requested that we undertake, and we have not undertaken, any independent investigation of the accuracy of the facts, representations and assumptions set forth or referred to herein.

For the purposes indicated above, and based upon the facts, assumptions and representations set forth or referred to herein, it is our opinion, with respect to the Merger, that for U.S. federal income tax purposes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. The Merger will constitute a "reorganization" within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended (the "Code"), and the Acquiring Fund and the Target Fund will each be a "party to a reorganization," within the meaning of Section 368(b) of the Code, with respect to such merger.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. No gain or loss will be recognized by the Acquiring Fund or the Merger Sub upon the Merger. (Section 1032(a) of the Code; Treas. Reg. Section 301.7701-2(a)).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. No gain or loss will be recognized by the Target Fund upon the Merger. (Sections 361(a) and (c) and 357(a) of the Code).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. No gain or loss will be recognized by the Target Fund's shareholders upon the conversion, pursuant to the Plan, of all their common shares of the Target Fund solely into New Shares in the Merger, except to the extent the holders of Target Fund shares receive cash in lieu of a fractional New Share. (Section 354(a) of the Code).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. The aggregate basis of the New Shares received by the Target Fund shareholder pursuant to the Merger (including any fractional New Share to which such shareholder would be entitled) will be the same as the aggregate basis of the Target Fund shares that were converted into such New Shares. (Section 358(a)(1) of the Code).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6. The holding period of the New Shares received by the Target Fund shareholder in the Merger (including any fractional New Share to which such shareholder would be entitled) will include the period during which the shares of the Target Fund that were converted into such New Shares were held by such shareholder, provided such Target Fund shares were held by such shareholder as capital assets at the Effective Time. (Section 1223(1) of the Code).

Tortoise Sustainable and Social Impact Term Fund

Tortoise Energy Infrastructure Corporation

TYG Merger Sub II, LLC

November 10, 2025

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7. The basis of the assets of the Target Fund received by the Merger Sub in the Merger will be the same as the basis of such assets in the hands of the Target Fund immediately before the Effective Time. (Section 362(b) of the Code).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8. The holding period of the assets of the Target Fund received by the Merger Sub in the Merger will include the period during which such assets were held by the Target Fund (except where investment activities of the Acquiring Fund have the effect of reducing or eliminating the holding period with respect to an asset). (Section 1223(2) of the Code).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9. The payment of cash to the holders of Target Fund shares in lieu of fractional New Shares will be treated as though such fractional shares were distributed as part of the Merger and then redeemed by the Acquiring Fund with the result that the holder of Target Fund shares will generally have a capital gain or loss to the extent the cash distribution differs from such holder's basis allocable to the fractional New Shares.

Notwithstanding anything to the contrary herein, we express no opinion as to the effect of the Reorganization (i) on the Target Fund, the Acquiring Fund, Merger Sub or any Target Fund shareholder with respect to any asset (including without limitation any stock held in a passive foreign investment company as defined in section 1297(a) of the Code) as to which any gain or loss is required to be recognized under U.S. federal income tax principles (a) at the end of a taxable year or upon the termination thereof, or (b) upon the transfer of such asset regardless of whether such transfer would otherwise be a non-taxable transaction under the Code, (ii) under the alternative minimum tax imposed under section 55 of the Code on any direct or indirect shareholder of the Target Fund that is a corporation, and (iii) any other U.S. federal tax issues (except those set forth above) and all state, local or foreign tax issues of any kind.

**<u>Facts</u>**

Our opinion is based upon the facts, representations and assumptions set forth or referred to above and the following facts and assumptions, any alteration of which could adversely affect our conclusions.

The Target Fund has been registered and operated, since it commenced operations, as a closed-end management investment company under the Investment Company Act of 1940, as amended (the "1940 Act"). The Target Fund's common shares are listed and traded on the New York Stock Exchange ("NYSE") under the symbol TEAF. The Target Fund has no shares outstanding other than common shares. The Target Fund is treated as a corporation for U.S. federal income tax purposes, has elected to be taxed as a regulated investment company under section 851 of the Code for all its taxable years, including without limitation the taxable year in which the Merger occurs, and has qualified and will continue to qualify for the tax treatment afforded regulated investment companies under the Code for each of its taxable years, including without limitation the taxable year in which the Merger occurs. All the outstanding shares of the Target Fund are treated as equity for federal income tax purposes.

The Acquiring Fund has been registered and operated, since it commenced operations, as a closed-end management investment company under the 1940 Act. The Acquiring Fund is a corporation for U.S. federal income tax purposes that is taxed as a regulated investment company under section 851 of the Code and will qualify for the tax treatment afforded regulated investment companies under the Code for each of its taxable years, including, without limitation, the taxable year that includes the Closing Date (as defined in the Plan). All New Shares issued in the Reorganization will be treated as equity for federal income tax purposes.

Tortoise Sustainable and Social Impact Term Fund

Tortoise Energy Infrastructure Corporation

TYG Merger Sub II, LLC

November 10, 2025

Merger Sub is a newly formed Maryland limited liability company and a direct, wholly-owned subsidiary of the Acquiring Fund that is and has been since the date of its organization disregarded as an entity separate from its owner within the meaning of section 301.7701-3 of the Treasury Regulations. Merger Sub has not elected, and will not elect, to be classified, with effect as of or prior to the Subsidiary Merger, as an association taxable as a corporation pursuant to section 301.7701-3 of the Treasury Regulations.

Upon satisfaction of certain terms and conditions set forth in the Plan at the Effective Time, the Target Fund will merge pursuant to applicable state law with and into Merger Sub with Merger Sub surviving and the common shares of the Target Fund will convert into the New Shares. Pursuant to applicable state law and without any further action or deed being required, as of the Effective Time, all the rights, privileges, powers, assets, property and liabilities of the Target Fund and Merger Sub will become the rights, privileges, powers, assets, property and liabilities of the Merger Sub and the separate legal existence of the Target Fund shall cease for all purposes. In the Merger, the aggregate net asset value as of the Valuation Time (as defined in the Plan) of the New Shares to be received by the Target Fund common shareholder (including for this purpose any fractional New Share to which such shareholder would be entitled), in each instance, will be equal to one multiplied by a fraction the numerator of which is the net asset value per share of the Target Fund common stock and the denominator of which is the net asset value per share of the shares of common stock of the Acquiring Fund. Immediately after the Merger, the Merger Sub will own all the assets that had been held by the Target Fund immediately prior to the Effective Time, and such assets shall be subject to all the liabilities of the Target Fund as existed immediately prior to the Effective Time. No fractional New Share will be issued to Target Fund shareholders in connection with the Merger. In lieu thereof, the Acquiring Fund's transfer agent, on behalf of the shareholders entitled to receive fractional New Shares, will aggregate all fractional New Shares and sell the resulting whole shares on the NYSE for the account of all shareholders of fractional interests, and each such shareholder will be entitled to a pro rata share of the proceeds from such sale.

There will be no dissenters' rights of appraisal with respect to the Reorganization under the applicable provisions of state law. Thus, no shareholder of any Target Fund will receive any cash or property in the Reorganization other than New Shares as a result of the conversion of his, her or its shares of the Target Fund and any cash in lieu of fractional New Shares.

As soon as practicable after the Effective Time, Merger Sub will merge with and into the Acquiring Fund, with the Acquiring Fund being the surviving entity in the Subsidiary Merger.

Following the Merger, the Acquiring Fund (directly or indirectly through Merger Sub) will continue the Target Fund's historic business in that it will have an investment objective and investment strategies, policies, risks and restrictions similar to those of the Target Fund. In addition, the Acquiring Fund will use a significant portion of the Target Fund's historic business assets in its business. Prior to the Effective Time, in connection with the Merger the Target Fund will reposition a portion of its portfolio to eliminate the sustainable investment sleeve managed by the sub-adviser (the "Target Fund Repositioning"). Target Fund's previously announced portfolio repositioning strategy to divest private assets in its portfolio (including its private credit, social infrastructure assets and most of its private fixed renewable assets) is not related to or made in connection with the Merger. At least thirty-four percent (34%) of the total fair market value of the Target Fund's portfolio assets (i) will meet, as of the Effective Time, and (ii) met, at all times beginning two years prior to the date the Board of Trustees of the Target Fund approved the Reorganization and at all times thereafter, the investment objective, strategies, policies, risks and restrictions of the Acquiring Fund. The Target Fund did not alter, and will not alter, its portfolio in connection with the Reorganization to meet this thirty-four percent (34%) threshold. No Fund modified any of its investment objective, strategies, policies, risks or restrictions to permit the Target Fund to meet this thirty-four percent (34%) threshold or in connection with the Reorganization and the Acquiring Fund has no plan or intention to change any of its investment objective, strategies, policies, risks or restrictions after the Merger.

Tortoise Sustainable and Social Impact Term Fund

Tortoise Energy Infrastructure Corporation

TYG Merger Sub II, LLC

November 10, 2025

In approving the Merger, the Board of Trustees of the Target Fund participating in the Merger determined that the Plan and the transactions contemplated thereunder are in the best interests of the Target Fund and the Board of Trustees of the Target Fund participating in such Merger determined that the interests of the shareholders of the Target Fund will not be diluted as a result of the Merger. In making such determinations, the Board of Trustees of the Target Fund considered a number of factors as set forth under the heading "Proposal 1: Authorization of the Merger-C. Information About the Merger-Background and Board Considerations Relating to the Proposed Merger" in the Joint Proxy Statement/Prospectus dated August 11, 2025 (the "Proxy Statement") relating to the Registration Statement (as defined below).

**<u>Conclusion</u>**

Based on the foregoing, it is our opinion with respect to the Merger (subject to the conditions and limitations set forth above) that the Merger, in accordance with the terms of the Plan, will qualify as a reorganization under section 368(a) of the Code.

The opinions set forth above (subject to the conditions and limitations set forth above) with respect to (i) the nonrecognition of gain or loss by the Target Fund, the Acquiring Fund and the Merger Sub, (ii) the basis and holding period of the assets received by the Merger Sub, (iii) the nonrecognition of gain or loss by the Target Fund's shareholders upon the receipt of the New Shares, except with respect to cash received in lieu of a fractional New Share, and (iv) the basis and holding period of the New Shares received by the Target Fund's shareholders follow as a matter of law from the opinion that the transfers under the Plan will qualify as a reorganization under section 368(a) of the Code.

The opinions expressed in this letter are based on the Code, the Income Tax Regulations promulgated by the Treasury Department thereunder and judicial authority reported as of the date hereof. We have also considered the positions of the Internal Revenue Service (the "Service") reflected in published and private rulings. Although we are not aware of any pending changes to these authorities that would alter our opinions, there can be no assurances that future legislative or administrative changes, court decisions or Service interpretations will not significantly modify the statements or opinions expressed herein. We do not undertake to make any continuing analysis of the facts or relevant law following the date of this letter or to notify you of any changes to such facts or law.

Our opinion is limited to those U.S. federal income tax issues specifically considered herein. We do not express any opinion as to any other U.S. federal tax issues, or any state, local or foreign tax law issues, arising from or related to the transactions contemplated by the Plan. Although the discussion herein is based upon our best interpretation of existing sources of law and expresses what we believe a court would properly conclude if presented with these issues, our opinion is not binding on the courts or the Service and no assurance can be given that such interpretations would be followed by the courts or the Service if they were to become the subject of judicial or administrative proceedings.

Tortoise Sustainable and Social Impact Term Fund

Tortoise Energy Infrastructure Corporation

TYG Merger Sub II, LLC

November 10, 2025

This opinion is furnished to each Fund solely for its benefit in connection with the Reorganization and is not to be relied upon, for any other purpose, in whole or in part, without our express prior written consent. Shareholders of the Funds may rely on this opinion, it being understood that we are not establishing any attorney-client relationship with any shareholder of any of the Funds. This letter is not to be relied upon for the benefit of any other person.

We hereby consent to the filing of a form of this opinion as an exhibit to the Registration Statement on Form N-14 (File No. 333-288207) relating to the Reorganization filed by the Acquiring Fund with the Securities and Exchange Commission (the "Registration Statement"), to the discussion of this opinion in the Proxy Statement relating to the Registration Statement and to the use of our name and to any reference to our firm in the Registration Statement and the Proxy Statement. In giving such consent, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the rules and regulations of the Securities and Exchange Commission thereunder.

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| Very truly yours, |
| /s/ Vedder Price P.C. |
| VEDDER PRICE P.C. |

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