# EDGAR Filing Document

**Accession Number:** 0001031296
**File Stem:** 0001193125-26-261805
**Filing Date:** 2026-6
**Character Count:** 114089
**Document Hash:** 5a630e52dae8c925a90a951c2a02e0da
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-261805.hdr.sgml**: 20260608

**ACCESSION NUMBER**: 0001193125-26-261805

**CONFORMED SUBMISSION TYPE**: S-3/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260608

**DATE AS OF CHANGE**: 20260608

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIRSTENERGY CORP
- **CENTRAL INDEX KEY:** 0001031296
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 341843785
- **STATE OF INCORPORATION:** OH
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-3/A
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-296357
- **FILM NUMBER:** 261072939

**BUSINESS ADDRESS:**
- **STREET 1:** 341 WHITE POND DRIVE
- **CITY:** AKRON
- **STATE:** OH
- **ZIP:** 44320
- **BUSINESS PHONE:** 330-761-7837

**MAIL ADDRESS:**
- **STREET 1:** 341 WHITE POND DRIVE
- **CITY:** AKRON
- **STATE:** OH
- **ZIP:** 44320

##### [**Table of Contents**](#toc)
**As filed with the Securities and Exchange Commission on June 8, 2026** 

**Registration No. 333-296357** 

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**Amendment No. 1** 

**to** 

**FORM S-3** 

**REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933** 

## FirstEnergy Corp.
**(Exact name of registrant as specified in its charter)** 

---

| | |
|:---|:---|
| **Ohio** | **34-1843785**  |
| **(State or other jurisdiction of<br>incorporation or organization)** | **(I.R.S. Employer<br>Identification Number)** |

---

**341 White Pond Drive Akron, Ohio 44320 (800) 736-3402** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**Mary M. Swann** 

**Vice President, Corporate Secretary and Associate General Counsel** 

**FirstEnergy Corp.** 

**341 White Pond Drive** 

**Akron, Ohio 44320** 

**(330) 384-5400** 

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

***With a copy to:***

**Celia A. Soehner** 

**Morgan, Lewis & Bockius LLP** 

**One Oxford Centre, Thirty-Second Floor** 

**Pittsburgh, PA 15219-6401** 

**(412) 560-3300** 

**Approximate date of commencement of proposed sale to the public**: From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☒ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
|  |  | Emerging growth company | ☐ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

**The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.** 

------

##### [**Table of Contents**](#toc)
**The information in this prospectus is not complete and may be changed or supplemented. No securities described in this prospectus can be sold until the registration statement that we filed to cover the securities has become effective under the rules of the Securities and Exchange Commission. This prospectus is not an offer to sell the securities, nor is it a solicitation of an offer to buy the securities in any state where an offer or sale of the securities is not permitted.** 

**SUBJECT TO COMPLETION, DATED JUNE 8, 2026** 

**PROSPECTUS** 

## FirstEnergy Corp.
**$3,000,000,000** 

**Debt Securities** 

**Common Stock** 

**Preferred Stock** 

**Depositary Shares** 

**Warrants** 

**Rights** 

**Purchase Contracts** 

**Units** 

This prospectus relates to debt securities, which may be senior, subordinated or junior subordinated debt securities, common stock, preferred stock, depositary shares, warrants, rights, purchase contracts and units (collectively, the "securities") that FirstEnergy Corp. may offer from time to time. Our debt securities, preferred stock and warrants may be convertible into or exercisable or exchangeable for our common stock or other securities. The securities may be offered in one or more series and in an amount or number, at prices and on other terms and conditions to be determined at the time of offering.

We will provide specific terms of these offerings and securities in supplements to this prospectus. You should read this prospectus, the information incorporated by reference in this prospectus and any prospectus supplement carefully before you invest. This prospectus may not be used to offer or sell any securities unless accompanied by a prospectus supplement.

Our common stock is listed on the New York Stock Exchange, or the NYSE, under the trading symbol "FE."

**Investing in these securities involves certain risks. See "[Risk Factors](#toc57576_5)" on page 6 to read about factors you should consider before investing in our securities.** 

We may offer these securities directly or through underwriters, agents or dealers. The supplements to this prospectus will describe the terms of any particular plan of distribution, including any underwriting arrangements or commissions. See the "Plan of Distribution" section beginning on page 21 of this prospectus for more information.

**Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.** 

**This prospectus is dated , 2026** 

------

##### [**Table of Contents**](#toc)
**TABLE OF CONTENTS** 

---

| | |
|:---|:---|
|  | **Page** |
|  [ABOUT THIS PROSPECTUS](#toc57576_1) | 1 |
|  [CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS](#toc57576_2) | 2 |
|  [WHERE YOU CAN FIND MORE INFORMATION](#toc57576_3) | 3 |
|  [THE COMPANY](#toc57576_4) | 5 |
|  [RISK FACTORS](#toc57576_5) | 6 |
|  [USE OF PROCEEDS](#toc57576_6) | 6 |
|  [DESCRIPTION OF DEBT SECURITIES](#toc57576_7) | 7 |
|  [DESCRIPTION OF COMMON STOCK AND PREFERRED STOCK](#toc57576_8) | 15 |
|  [DESCRIPTION OF DEPOSITARY SHARES](#toc57576_9) | 19 |
|  [DESCRIPTION OF WARRANTS](#toc57576_10) | 19 |
|  [DESCRIPTION OF RIGHTS](#toc57576_11) | 19 |
|  [DESCRIPTION OF PURCHASE CONTRACTS](#toc57576_12) | 20 |
|  [DESCRIPTION OF UNITS](#toc57576_13) | 20 |
|  [PLAN OF DISTRIBUTION](#toc57576_14) | 21 |
|  [LEGAL MATTERS](#toc57576_15) | 23 |
|  [EXPERTS](#toc57576_16) | 23 |

---

**We are responsible for the information contained and incorporated by reference in this prospectus, in any accompanying prospectus supplement, and in any related free writing prospectus we prepare or authorize. We have not authorized anyone to give you any other information, and we take no responsibility for any other information that others may give you. If you are in a jurisdiction where offers to sell, or solicitations of offers to purchase, the securities offered by this document are unlawful, or if you are a person to whom it is unlawful to direct these types of activities, then the offer presented in this document does not extend to you. The information contained in this document speaks only as of the date of this document, unless the information specifically indicates that another date applies.** 

i

------

##### [**Table of Contents**](#toc)
**ABOUT THIS PROSPECTUS** 

This prospectus is a part of a registration statement that we filed with the Securities and Exchange Commission, or the SEC, utilizing a "shelf" registration process. Under this shelf registration process, we may, from time to time, use this prospectus to offer and sell any one or a combination of the securities described in this prospectus in one or more offerings, at prices and on other terms to be determined at the time of offering, up to a total dollar amount of $3,000,000,000. We may offer any of the following securities: debt securities, which may be senior, subordinated, or junior subordinated debt securities, any of which may be convertible into our common stock, preferred stock, depositary shares, warrants, rights, purchase contracts and units.

This prospectus provides you with a general description of FirstEnergy and the securities that we may offer. Each time we sell securities under this prospectus, we will provide a prospectus supplement that contains specific information about the terms of that offering, including the type, amount or number and other terms and conditions of the securities being offered, the price at which the securities are being offered, and the plan of distribution for the securities. The specific terms of the offered securities may vary from the general terms of the securities described in this prospectus and, accordingly, the description of the securities contained in this prospectus is subject to, and qualified by reference to, the specific terms of the offered securities contained in the accompanied prospectus supplement. If there is any inconsistency between the information in this prospectus and in the prospectus supplement, you should rely on the information in the prospectus supplement.

The prospectus supplement may also add, update or change information contained in this prospectus, including information about us. You should assume that the information contained or incorporated by reference in this prospectus or any prospectus supplement is accurate only as of the date on the front cover of the applicable document. Therefore, for a complete understanding of the offered securities, you should carefully read this prospectus and any prospectus supplement, together with the additional information described below under the heading "Where You Can Find More Information." For more detailed information about the securities, you can also read the exhibits to the registration statement. Those exhibits have been either filed with the registration statement or incorporated by reference to earlier SEC filings listed in the registration statement.

The distribution of this prospectus and the applicable prospectus supplement and the offering of the securities in certain jurisdictions may be restricted by law. Persons into whose possession this prospectus and the applicable prospectus supplement come should inform themselves about and observe any such restrictions. This prospectus and the applicable prospectus supplement do not constitute, and may not be used in connection with, an offer or solicitation by anyone in any jurisdiction in which such offer or solicitation is not authorized or in which the person making such offering or solicitation is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation.

This prospectus, the applicable prospectus supplement and any free writing prospectus that we prepare or authorize contain and incorporate by reference information that you should consider when making your investment decision. No one is authorized to provide you with information different from that which is contained, or deemed to be contained, in this prospectus and applicable prospectus supplement. We are not making an offer of these securities in any jurisdiction where the offer is not permitted. You should not assume that the information in this prospectus or the documents incorporated by reference is accurate as of any date other than the date on the front of those documents.

In this prospectus, unless the context indicates otherwise, the words "FirstEnergy," "the company," "we," "our," "ours" and "us" refer to FirstEnergy Corp. and its consolidated subsidiaries.

------

##### [**Table of Contents**](#toc)
**CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS** 

This prospectus and the information incorporated by reference herein include forward-looking statements based on information currently available to management. Such statements are subject to certain risks and uncertainties and readers are cautioned not to place undue reliance on these forward-looking statements. These statements include declarations regarding management's intents, beliefs and current expectations. These statements typically contain, but are not limited to, the terms "anticipate," "potential," "expect," "forecast," "target," "will," "intend," "believe," "project," "estimate," "plan," and similar words. Forward-looking statements involve estimates, assumptions, known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements, which may include the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The potential liabilities, increased costs and unanticipated developments resulting from government
investigations and agreements, including those associated with compliance with or failure to comply with the Deferred Prosecution Agreement entered into on July 21, 2021 with the U.S. Attorney's Office for the Southern District of Ohio,
and settlements with the Ohio Attorney General's office and the SEC;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The risks and uncertainties associated with litigation, including the securities class action lawsuit, regulatory
proceedings, arbitration, mediation and similar proceedings;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Changes in national and regional economic conditions affecting us and/or our customers and the vendors with which
we do business, including geopolitical conflicts, recession, volatile interest rates, inflationary pressure, supply chain disruptions, higher fuel costs, and workforce impacts;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Variations in weather, such as mild seasonal weather variations and severe weather conditions (including events
caused, or exacerbated, by climate change, such as wildfires, hurricanes, flooding, droughts, high wind events and extreme heat events) and other natural disasters, which may result in increased storm restoration expenses or material liability and
negatively affect future operating results;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The potential liabilities and increased costs arising from regulatory actions or outcomes in response to severe
weather conditions and other natural disasters;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Legislative and regulatory developments, and executive orders, including, but not limited to, matters related to
rates, generation resource adequacy, co-location of generation and large loads, and compliance and enforcement activity;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The ability to access the public securities and other capital and credit markets in accordance with our financial
plans, the cost of such capital and overall condition of the capital and credit markets, including the loss of our status as a well-known seasoned issuer;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The risks associated with physical attacks, such as acts of war, terrorism, sabotage or other acts of violence,
and cyber-attacks and other disruptions to our, or our vendors', information technology system, which may compromise our operations, and data security breaches of sensitive data, intellectual property and proprietary or personally identifiable
information;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The ability to accomplish or realize anticipated benefits through establishing a culture of continuous
improvement and our other strategic and financial goals, including, but not limited to, executing Energize365, our transmission and distribution investment plan, executing on our rate filing strategy, controlling costs, improving credit metrics,
maintaining investment grade ratings, strengthening our balance sheet and growing earnings;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Changing market conditions affecting the measurement of certain liabilities and the value of assets held in our
pension trusts may negatively impact our forecasted growth rate, results of operations and may also cause us to make contributions to our pension sooner or in amounts that are larger than currently anticipated;

------

##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Changes in assumptions regarding factors such as economic conditions within our territories, the reliability of
our transmission and distribution system, our generation resource planning in West Virginia, or the availability of capital or other resources supporting identified transmission and distribution investment opportunities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Human capital management challenges, including among other things, attracting and retaining appropriately trained
and qualified employees, and labor disruptions by our unionized workforce;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Changes to environmental laws and regulations, including, but not limited to, federal and state rules related to
climate change, coal combustion residuals, and potential changes to such laws and regulations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Changes in customers' demand for power, including, but not limited to, economic conditions, development of
data centers, the impact of climate change, and emerging technology, particularly with respect to electrification, energy storage, co-location of generation and large loads, and distributed sources of
generation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Future actions taken by credit rating agencies that could negatively affect either our access to or terms of
financing or our financial condition and liquidity;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The potential of non-compliance with debt covenants in our credit
facilities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The ability to comply with applicable reliability standards and energy efficiency and peak demand reduction
mandates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Changes to significant accounting policies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Any changes in tax laws or regulations, including, but not limited to, the Inflation Reduction Act of 2022, the
One Big Beautiful Bill Act of 2025, or adverse tax audit results or rulings and potential changes to such laws and regulations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The ability to meet our publicly-disclosed goals relating to climate-related matters, opportunities,
improvements, and efficiencies, including FirstEnergy's greenhouse gas reduction goals; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The risks and other factors discussed from time to time in our SEC filings.

Dividends declared from time to time on our common stock during any period may in the aggregate vary from prior periods due to circumstances considered by our Board of Directors, or the Board, at the time of the actual declarations. A security rating is not a recommendation to buy or hold securities and is subject to revision or withdrawal at any time by the assigning rating agency. Each rating should be evaluated independently of any other rating.

These forward-looking statements are also qualified by, and should be read in conjunction with the other cautionary statements and risks that are included in our filings with the SEC, including, but not limited to, the most recent Annual Report on Form 10-K, any subsequent Quarterly Reports on Form 10-Q, and our other filings with the SEC. The foregoing review of factors also should not be construed as exhaustive. New factors emerge from time to time, and it is not possible for management to predict all such factors, nor assess the impact of any such factor on our business or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statements. We expressly disclaim any obligation to update or revise, except as required by law, any forward-looking statements contained herein or in the information incorporated by reference as a result of new information, future events or otherwise.

**WHERE YOU CAN FIND MORE INFORMATION** 

We file annual, quarterly and current reports and other information with the SEC under the Securities Exchange Act of 1934, as amended, or the Exchange Act. The SEC maintains an internet site that contains reports, proxy

------

##### [**Table of Contents**](#toc)
and information statements, and other information regarding issuers that file electronically with the SEC at www.sec.gov. This material is also available on our Investor Information website – www.firstenergycorp.com/ir. Information on or available through the SEC's website or our website, other than the reports we file pursuant to the Exchange Act that are incorporated by reference in this prospectus, is not part of this prospectus.

The SEC allows us to "incorporate by reference" information into this prospectus and any accompanying prospectus supplement, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is deemed to be part of this prospectus and any accompanying prospectus supplement, and later information that we file with the SEC will automatically update and supersede this information. We incorporate by reference herein the documents listed below, as well as any future filings that we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including any documents filed after the date of the initial registration statement and prior to such registration statement's effectiveness, until we sell all of the securities offered hereunder (other than, in each case, documents or information deemed to have been furnished and not filed in accordance with SEC rules):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our Annual Report on Form 10-K for the year ended December 31, 2025,
filed with the SEC on [February 18, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/53456/000103129626000046/fe-20251231.htm) , including the information specifically incorporated by reference
into such Annual Report from our Definitive Proxy Statement on Schedule 14A, filed with the SEC on [April 1, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1031296/000119312526138029/fe-20260401.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our Quarterly Report on Form 10-Q for the three months ended
March 31, 2026, filed with the SEC on [April 28, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001031296/000103129626000085/fe-20260331.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our Current Reports on Form 8-K filed with the SEC on [February 12, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1031296/000103129626000020/fe-20260208.htm) and [May 20, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001031296/000103129626000089/fe-20260520.htm) ; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the description of our common stock contained in [Exhibit 4.10](http://www.sec.gov/Archives/edgar/data/1031296/000103129620000008/fe-12312019xex4x10.htm) to our Annual Report on Form 10-K for the year ended December 
31, 2019, filed with the SEC on [February 10, 2020](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/1031296/000103129620000008/fe-12312019x10k.htm) , and any amendments and reports subsequently filed
for the purposes of updating that description.

We will provide, without charge, to each person, including any beneficial owner of our securities to whom this prospectus is delivered, upon written or oral request, a copy of any or all documents referred to above that have been incorporated by reference into this prospectus, excluding exhibits to those documents unless they are specifically incorporated by reference into those documents. You may request these documents from:

FirstEnergy Corp.

341 White Pond Drive

Akron, Ohio 44308-1890

Attention: Shareholder Services

(800) 736-3402

------

##### [**Table of Contents**](#toc)
**THE COMPANY** 

FirstEnergy is dedicated to integrity, safety, reliability and operational excellence and is principally involved in the transmission, distribution and generation of electricity through our reportable segments: Distribution, Integrated and Stand-Alone Transmission. Our electric distribution companies form one of the nation's largest investor-owned electric systems, serving over six million customers in Ohio, Pennsylvania, New Jersey, West Virginia, Maryland and New York. Our transmission subsidiaries operate more than 24,000 miles of transmission lines that connect the Midwest and Mid-Atlantic regions and two regional transmission operation centers. As of March 31, 2026, our wholly-owned subsidiary Monongahela Power Company, or MP, and MP's wholly-owned generation subsidiary Allegheny Generating Company, or AGC, controlled 3,610 MWs of net maximum generation capacity

We were incorporated under Ohio law in 1996. Our principal executive offices are located at 341 White Pond Drive, Akron, Ohio 44320. Our telephone number is (800) 736-3402 and our Internet website is www.firstenergycorp.com.

------

##### [**Table of Contents**](#toc)
**RISK FACTORS** 

Investing in our securities involves risks. Before purchasing any securities offered, you should carefully consider the risk factors that are incorporated by reference herein from the section captioned "Risk Factors" in our most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q, as applicable, together with all of the other information included in this prospectus and any prospectus supplement and any other information that we have incorporated by reference, including annual, quarterly and other reports filed with the SEC subsequent to the date hereof. Any of these risks, as well as other risks and uncertainties, could harm or otherwise impact our financial condition, results of operations or cash flows. See also "Cautionary Note Regarding Forward-Looking Statements" in this prospectus.

**USE OF PROCEEDS** 

We intend to use the net proceeds we receive from issuance of the securities offered under this prospectus for general corporate purposes, unless otherwise specified in the prospectus supplement relating to a specific issue of securities. General corporate purposes may include, but are not limited to, financing and operating activities, capital expenditures, acquisitions, maintenance of our assets and refinancing our existing indebtedness. Until we apply the proceeds from a sale of securities to the intended purposes, we may invest those proceeds.

------

##### [**Table of Contents**](#toc)
**DESCRIPTION OF DEBT SECURITIES** 

In this "Description of Debt Securities" section, unless the context indicates otherwise, the words "FirstEnergy," "the company," "we," "our," "ours" and "us" refer to FirstEnergy Corp. and not its consolidated subsidiaries.

**Overview** 

We may offer debt securities, which may be senior, subordinated, or junior subordinated, and may be convertible. Unless otherwise specified in the applicable prospectus supplement, the debt securities will be issued in one or more new series under an indenture, dated as of November 15, 2001, between us and The Bank of New York Mellon Trust Company, N.A., as successor trustee. The indenture gives us broad authority to set the particular terms of each series of debt securities, including the right to modify certain of the terms contained in the indenture. The particular terms of a series of debt securities and the extent, if any, to which such particular terms modify the terms of the indenture or otherwise vary from the terms and provisions set forth below will be described in the prospectus supplement relating to those debt securities.

The indenture contains the full text of the matters described in this section. Because this section is a summary, it does not describe every aspect of the debt securities or the indenture. This summary is subject to and qualified in its entirety by reference to all the provisions of the indenture, including definitions of terms used in the indenture. You should read the indenture incorporated by reference as an exhibit to the registration statement of which this prospectus is a part. We also include references in parentheses to certain sections of the indenture. Whenever we refer to particular sections or defined terms of the indenture in this prospectus or in a prospectus supplement, these sections or defined terms are incorporated by reference herein or in the prospectus supplement. This summary also is subject to and qualified by reference to the description of the particular terms of the debt securities described in the applicable prospectus supplement or supplements.

If applicable, the prospectus supplement relating to an issue of debt securities will describe any material United States federal income tax considerations relevant to those debt securities.

There is no requirement under the indenture that future issues of our debt securities be issued under the indenture. We will be free to use other indentures or documentation, containing provisions different from those included in the indenture or applicable to one or more issues of debt securities, in connection with future issues of other debt securities.

**General** 

The indenture does not limit the aggregate principal amount of debt securities that we may issue under the indenture. The indenture provides that the debt securities may be issued in one or more series and may be convertible or exchangeable. The debt securities may be issued at various times and may have differing maturity dates and may bear interest at differing rates. We need not issue all debt securities of one series at the same time and, unless otherwise provided, we may reopen a series, without the consent of the holders of the debt securities of that series, for issuances of additional debt securities of that series. Any convertible debt securities that we may issue will be convertible into or exchangeable for common stock or other securities of ours or of a third party. Conversion may be mandatory or at your option and would be at prescribed conversion rates.

Prior to the issuance of each series of debt securities, the terms of the particular securities will be specified in a supplemental indenture, a board resolution or in one or more officer's certificates authorized pursuant to a board resolution. We refer you to the applicable prospectus supplement for a description of the following terms of the series of debt securities:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• title of the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any limit on the aggregate principal amount of the debt securities;

------

##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the person to whom any interest on the debt securities shall be payable, if other than the person in whose name
the debt securities are registered at the close of business on the regular record date for that interest;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the date or dates on which the principal of the debt securities will be payable or how the date or dates will be
determined;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the rate or rates at which the debt securities will bear interest, if any, or how the rate or rates will be
determined and the date or dates from which interest will accrue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the dates on which interest will be payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the record dates for payments of interest;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the place or places, if any, in addition to the office of the trustee, where the principal of, and premium, if
any, and interest, if any, on the debt securities will be payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the period or periods within which, the price or prices at which, and the terms and conditions upon which, the
debt securities may be redeemed, in whole or in part, at our option;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any sinking fund or other provisions or options held by holders of the debt securities that would obligate us to
purchase or redeem the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the percentage, if less than 100%, of the principal amount of the debt securities that will be payable if the
maturity of the debt securities is accelerated;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• whether the debt securities will be issued in book-entry form, represented by one or more global securities
certificates deposited with, or on behalf of, a securities depositary and registered in the name of the depositary or its nominee, and if so, the identity of the depositary;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any changes or additions to the events of default under the indenture or changes or additions to our covenants
under the indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the terms, if any, pursuant to which the debt securities of such series, or any tranche thereof, may be converted
into or exchanged for shares of capital stock or other securities of FirstEnergy or any other person;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any collateral security, assurance or guarantee for the debt securities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any other specific terms applicable to the debt securities.

Unless we otherwise indicate in the applicable prospectus supplement, the debt securities will be denominated in United States currency in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof.

Unless we otherwise indicate in the applicable prospectus supplement, there are no provisions in the indenture or the debt securities that require us to redeem, or permit the holders to cause a redemption of, the debt securities or that otherwise protect the holders in the event that we incur substantial additional indebtedness, whether or not in connection with a change in control of our company.

**Security and Ranking** 

Any debt securities issued hereunder will be unsecured. Any senior debt securities will rank equally with all of our other unsecured and unsubordinated debt. Any junior subordinated debt securities will be junior in right of payment to senior debt securities. For current information on our outstanding debt, please refer to our most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q. See "Where You Can Find More Information."

We conduct our operations primarily through our consolidated subsidiaries and substantially all of our consolidated assets are held by our subsidiaries.

------

##### [**Table of Contents**](#toc)
Accordingly, our cash flow and our ability to meet our obligations under the debt securities are largely dependent upon the earnings of our consolidated subsidiaries and the distribution or other payment of these earnings to us in the form of dividends. Our consolidated subsidiaries are separate and distinct legal entities and have no obligation to pay any amounts due on our debt securities or to make any funds available for payment of amounts due on our debt securities.

Because we are a holding company, our obligations under the debt securities will be effectively subordinated to all existing and future liabilities of our consolidated subsidiaries.

Therefore, our rights and the rights of our creditors, including the rights of the holders of our debt securities, to participate in the liquidation of assets of any subsidiary will be subject to the prior claims of the subsidiary's creditors. To the extent that we may be a creditor with recognized claims against any of our subsidiaries, our claims would still be effectively subordinated to any security interest in, or mortgages or other liens on, the assets of the subsidiary and would be subordinated to any indebtedness, other liabilities, and preferred securities, of the subsidiary, senior to that held by us.

**Payment and Paying Agents** 

Unless otherwise indicated in a prospectus supplement, we will pay interest on our debt securities on each interest payment date by wire transfer to an account at a banking institution in the United States that is designated in writing to the trustee by the person entitled to that payment or by check mailed to the person in whose name the debt security is registered as of the close of business on the regular record date relating to the interest payment date, except that interest payable at stated maturity, upon redemption or otherwise, will be paid to the person to whom principal is paid. However, if we default in paying interest on a debt security, we may pay defaulted interest to the registered owner of the debt security as of the close of business on a special record date selected by the trustee, which will be between 10 and 15 days before the date we propose for payment of the defaulted interest, or in any other lawful manner of payment that is consistent with the requirements of any securities exchange on which the debt securities may be listed for trading, if the trustee finds it practicable.

**Redemption** 

We will set forth any terms for the redemption of debt securities in a prospectus supplement. Unless we indicate differently in a prospectus supplement, and except with respect to debt securities redeemable at the option of the registered holder, debt securities will be redeemable upon notice by mail between 30 and 60 days prior to the redemption date. If less than all of the debt securities of any series or any tranche of a series are to be redeemed, the trustee will select the debt securities to be redeemed and will choose the method of random selection it deems fair and appropriate.

Debt securities will cease to bear interest on the redemption date. We will pay the redemption price and any accrued interest to the redemption date once you surrender the debt security for redemption. If only part of a debt security is redeemed, the trustee will deliver to you a new debt security of the same series for the remaining portion without charge.

We may make any redemption conditional upon the receipt by the paying agent, on or prior to the date fixed for redemption, of money sufficient to pay the redemption price. If the paying agent has not received the money by the date fixed for redemption, we will not be required to redeem the debt securities.

**Registration, Transfer and Exchange** 

Debt securities of any series will be exchangeable for other debt securities of the same series of any authorized denominations and of a like aggregate principal amount and tenor, unless otherwise indicated in the applicable prospectus supplement.

------

##### [**Table of Contents**](#toc)
Unless we otherwise indicate in the applicable prospectus supplement, debt securities may be presented for registration of transfer, duly endorsed or accompanied by a duly executed written instrument of transfer, at the office or agency maintained for this purpose, without service charge except for reimbursement of taxes and other governmental charges as described in the indenture.

In the event of any redemption of debt securities of any series, the trustee will not be required to exchange or register a transfer of any debt securities of the series selected, called or being called for redemption except the unredeemed portion of any debt security being redeemed in part.

**Limitation on Liens** 

The indenture provides that, except as otherwise specified with respect to a particular series of debt securities, we will not pledge, mortgage, hypothecate or grant a security interest in, or permit any mortgage, pledge, security interest, or other lien upon, any capital stock of any subsidiary now or hereafter directly owned by us, to secure any indebtedness without also equally and ratably securing the outstanding debt securities of that series and all other indebtedness entitled to be so secured.

This restriction does not apply to, or prevent the creation or any extension, renewal or refunding of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any mortgage, pledge, security interest, lien or encumbrance upon any capital stock created at the time we
acquire it or within one year after that time to secure the purchase price for the capital stock;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any mortgage, pledge, security interest, lien or encumbrance upon any capital stock existing at the time we
acquire it, whether or not we assume the secured obligations; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any judgment, levy, execution, attachment or other similar lien arising in connection with court proceedings,
provided that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the execution or enforcement of the lien is effectively stayed within 30 days after entry of the corresponding
judgment, or the corresponding judgment has been discharged within that 30-day period, and the claims secured by the lien are being contested in good faith by appropriate proceedings timely commenced and
diligently prosecuted;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the payment of each lien is covered in full by insurance and the insurance company has not denied or contested
coverage thereof; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• so long as each lien is adequately bonded, any appropriate and duly initiated legal proceedings for the review of
the corresponding judgment, decree or order shall not have been fully terminated or the period within which these proceedings may be initiated shall not have expired.

Unless we otherwise specify in the prospectus supplement for a particular series of debt securities, we may, without securing the debt securities of that series, pledge, mortgage, hypothecate or grant a security interest in, or permit any mortgage, pledge, security interest or other lien, in addition to liens expressly permitted as described in the preceding paragraphs, upon, capital stock of any subsidiary now or hereafter owned by us to secure any indebtedness, which would otherwise be subject to the foregoing restriction, in an aggregate amount which, together with all other such indebtedness, does not exceed 10% of our consolidated net tangible assets.

For purposes of this covenant, "consolidated net tangible assets" means the amount shown as total assets on our consolidated balance sheet, less (i) intangible assets including, without limitation, such items as goodwill, trademarks, trade names, patents, and unamortized debt expense; (ii) current liabilities; and (iii) appropriate adjustments, if any, related to minority interests. These amounts will be determined in accordance with accounting principles generally accepted in the United States.

The foregoing limitation does not limit in any manner:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to place liens on any of our assets other than the capital stock of subsidiaries that we directly
own;

------

##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to cause the transfer of our assets or those of our subsidiaries, including the capital stock covered
by the foregoing restrictions; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the ability of any of our subsidiaries to place liens on any of their assets.

**Consolidation, Merger, Conveyance, Sale or Transfer** 

We have agreed not to consolidate with or merge into any other entity or convey, sell or otherwise transfer our properties and assets substantially as an entirety to any entity unless:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the successor is an entity organized and existing under the laws of the United States of America or any State or
the District of Columbia;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the successor expressly assumes by a supplemental indenture the due and punctual payment of the principal of, and
premium, if any, and interest, if any, on all outstanding debt securities under the indenture and the performance of every covenant of the indenture that we would otherwise have to perform or observe; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• immediately after giving effect to the transactions, no event of default with respect to any series of debt
securities issued under the indenture and no event which after notice or lapse of time or both would become an event of default with respect to any series of debt securities issued under the indenture, will have occurred and be continuing.

**Modification of the Indenture** 

Under the indenture or any supplemental indenture, our rights and the rights of the holders of debt securities may be changed with the consent of the holders representing a majority in principal amount of the outstanding debt securities of all series affected by the change, voting as one class, provided that the following changes may not be made without the consent of the holders of each outstanding debt security affected thereby:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• change the fixed date upon which the principal of or the interest on any debt security is due and payable, or
reduce the principal amount thereof or the rate of interest thereon or any premium payable upon the redemption thereof, or reduce the amount of the principal of an original issue discount security that would be due and payable upon a declaration of
acceleration of the maturity thereof, or change the coin or currency (or other property) in which any debt security or any premium, if any, or the interest thereon is payable, or impair the right to institute suit for the enforcement of any payment
on or after the date that payment is due and payable or, in the case of redemption, on or after the date fixed for such redemption;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the stated percentage of debt securities, the consent of the holders of which is required for any
modification of the indenture or for waiver by the holders of certain of their rights; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• modify certain provisions of the indenture.

An "original issue discount security" means any security authenticated and delivered under the indenture which provides for an amount less than the principal amount thereof to be due and payable upon the declaration of acceleration of the maturity thereof.

The indenture also permits us and the trustee to amend the indenture without the consent of the holders of any debt securities for any of the following purposes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to evidence the assumption by any permitted successor of our covenants in the indenture and in the debt
securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to add to the covenants with which we must comply or to surrender any of our rights or powers under the
indenture;

------

##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to add additional events of default;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to change, eliminate, or add any provision to the indenture; provided, however, if the change, elimination, or
addition will adversely affect the interests of the holders of debt securities of any series, other than any series the terms of which permit such change, elimination or addition, in any material respect, the change, elimination, or addition will
become effective only:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• when the consent of the holders of debt securities of the series has been obtained in accordance with the
indenture; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• when no debt securities of the series remain outstanding under the indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to provide collateral security for all of the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to establish the form or terms of debt securities of any other series as permitted by the indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to provide for the authentication and delivery of bearer securities and coupons attached thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to evidence and provide for the acceptance of appointment of a successor trustee;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to provide for the procedures required for use of a noncertificated system of registration for all or any series
of debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to change any place where principal, premium, if any, and interest shall be payable, debt securities may be
surrendered for registration of transfer or exchange and notices to us may be served; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to cure any ambiguity or inconsistency or to make any other provisions with respect to matters and questions
arising under the indenture; provided that such action shall not adversely affect the interests of the holders of debt securities of any series in any material respect.

**Events of Default** 

An event of default with respect to any series of debt securities is defined in the indenture as being any one of the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• failure to pay interest on the debt securities of that series for 30 days after payment is due;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• failure to pay principal of or any premium on the debt securities of that series when due, whether at stated
maturity or upon earlier acceleration or redemption;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• failure to perform other covenants in the indenture for 90 days after we are given written notice from the
trustee or the trustee receives written notice from the registered owners of at least 33% in principal amount of the debt securities of that series; however, the trustee or the trustee and the holders of such principal amount of debt securities of
that series can agree to an extension of the 90-day period and such an agreement to extend will be automatically deemed to occur if we are diligently pursuing action to correct the default;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• certain events of bankruptcy, insolvency, reorganization, receivership or liquidation relating to us; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any other event of default included in the supplemental indenture or officer's certificate for that series
of debt securities.

An event of default regarding a particular series of debt securities does not necessarily constitute an event of default for any other series of debt securities.

We will be required to file with the trustee annually an officer's certificate as to the absence of default in performance of all covenants in the indenture. The indenture provides that the trustee may withhold notice to the holders of the debt securities of any default, except in payment of principal of, or premium, if any, or interest on, the debt securities or in the payment of any sinking fund installment with respect to the debt securities, if the trustee in good faith determines that it is in the interest of the holders of the debt securities to do so.

------

##### [**Table of Contents**](#toc)
The indenture provides that, if an event of default with respect to the debt securities of any series occurs and continues, either the trustee or the holders of at least 33% in principal amount of the debt securities of that series may declare the principal amount of all the debt securities to be due and payable immediately. However, if the event of default is applicable to all outstanding debt securities under the indenture, only the trustee or holders of at least 33% in principal amount of all outstanding debt securities of all series, voting as one class, and not the holders of any one series, may make such a declaration of acceleration.

At any time after a declaration of acceleration with respect to the debt securities of any series has been made and before a judgment or decree for payment of the money due has been obtained, the event of default giving rise to such declaration of acceleration will be considered waived, and such declaration and its consequences will be considered rescinded and annulled, if:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we have paid or deposited with the trustee a sum sufficient to pay:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all overdue interest, if any, on all debt securities of the series,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the principal of and premium, if any, on any debt securities of the series which have otherwise become due and
interest, if any, that is currently due, including interest on overdue interest, if any, and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all amounts due to the trustee under the indenture; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any other event of default with respect to the debt securities of that series has been cured or waived as
provided in the indenture.

There is no automatic acceleration, even in the event of our bankruptcy, insolvency or reorganization.

Subject to the provisions of the indenture relating to the duties of the trustee, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request or direction of any of the holders of the debt securities, unless the holders shall have offered to the trustee reasonable indemnity.

Subject to the provision for indemnification, the holders of a majority in principal amount of the debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee with respect to the debt securities of that series. However, if the event of default relates to more than one series of debt securities, only the holders of a majority in aggregate principal amount of all affected series will have the right to give this direction. However, the trustee shall have the right to decline to follow any direction if the trustee shall determine that the action so directed conflicts with any law or the provisions of the indenture or if the trustee shall determine that the action would be prejudicial to holders not taking part in the direction.

**Satisfaction and Discharge** 

We will be discharged from our obligations on the debt securities of any series, or any portion of the principal amount of the debt securities of any series, if we:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• irrevocably deposit with the trustee sufficient cash or eligible obligations (or a combination of both) to pay
the principal, or portion of principal, interest, any premium and any other sums when due on the debt securities at their maturity, stated maturity date, or redemption; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• deliver to the trustee:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a company order stating that the money and eligible obligations deposited in accordance with the indenture shall
be held in trust and certain opinions of counsel and of an independent public accountant;

------

##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if such deposit shall have been made prior to the maturity of the debt securities of the series, an
officer's certificate stating our intention that, upon delivery of the officer's certificate, our indebtedness in respect of those debt securities, or the portions thereof, will have been satisfied and discharged as contemplated in the
indenture; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• an opinion of counsel to the effect that, as a result of a change in law or a ruling of the United States
Internal Revenue Service, the holders of the debt securities of the series, or portions thereof, will not recognize income, gain or loss for United States federal income tax purposes as a result of the satisfaction and discharge of our indebtedness
and will be subject to United States federal income tax on the same amounts, at the same times and in the same manner as if we had not so satisfied and discharged our indebtedness.

For this purpose, "eligible obligations" include direct obligations of, or obligations unconditionally guaranteed by, the United States entitled to the benefit of the full faith and credit thereof and certificates, depositary receipts or other instruments which evidence a direct ownership interest in such obligations or in any specific interest or principal payments due in respect thereof and which do not contain provisions permitting their redemption or other prepayment at the option of the issuer thereof.

In the event that all of the conditions set forth above have been satisfied for any series of debt securities, or portions thereof, except that, for any reason, we have not delivered the officer's certificate and opinion described under the second bulleted item above, the holders of those debt securities will no longer be entitled to the benefits of certain of our covenants under the indenture, including the covenant described above in "— Limitation on Liens." Our indebtedness under those debt securities, however, will not be deemed to have been satisfied and discharged prior to maturity, and the holders of those debt securities may continue to look to us for payment of the indebtedness represented by those debt securities.

The indenture will be deemed satisfied and discharged when no debt securities remain outstanding and when we have paid all other sums payable by us under the indenture. All moneys we pay to the trustee or any paying agent on debt securities which remain unclaimed at the end of two years after payments have become due will be paid to us or upon our order. Thereafter, the holder of those debt securities may look only to us for payment and not the trustee or any paying agent.

**Resignation or Removal of Trustee** 

The trustee may resign at any time by giving written notice to us specifying the day upon which the resignation is to take effect. The resignation will take effect immediately upon the later of the appointment of a successor trustee and the specified day.

The trustee may be removed at any time by an instrument or concurrent instruments in writing delivered to the trustee and us and signed by the holders, or their attorneys-in-fact, representing at least a majority in principal amount of the then outstanding debt securities. In addition, under certain circumstances, we may remove the trustee upon notice to the holder of each debt security outstanding and the trustee, and appointment of a successor trustee.

**Concerning the Trustee** 

The Bank of New York Mellon Trust Company, N.A. is the successor trustee under the indenture. We and our affiliates maintain other banking relationships in the ordinary course of business with the trustee and its affiliates.

**Governing Law** 

The indenture and the debt securities will be governed by and construed in accordance with the laws of the State of New York, except to the extent that the law of any other jurisdiction shall be mandatorily applicable.

------

##### [**Table of Contents**](#toc)
**DESCRIPTION OF COMMON STOCK AND PREFERRED STOCK** 

The following summary description sets forth some of the general terms and provisions of our common and preferred stock. This summary is not complete. For a more detailed description of our common and preferred stock, you should refer to our Amended and Restated Articles of Incorporation, which we refer to as our Articles of Incorporation, and Third Amended and Restated Code of Regulations, as amended, which we refer to as our Code of Regulations. The Articles of Incorporation and the Code of Regulations have been filed as exhibits to the registration statement. This summary is qualified in its entirety by express reference to our Articles of Incorporation and Code of Regulations.

**General** 

Our capital stock consists of two classes: common stock, $0.10 par value per share, and preferred stock, $100 par value per share. We are authorized by our Articles of Incorporation to issue up to 700,000,000 shares of common stock and up to 5,000,000 shares of preferred stock. As of March 31, 2026, 578,431,175 shares of common stock were outstanding, and no shares of preferred stock were outstanding.

**Dividend Rights** 

Subject only to any prior rights and preferences of any shares of our preferred stock that are or may in the future be issued and outstanding, the holders of our common stock are entitled to receive dividends when, as and if declared by our Board out of legally available funds. There can be no assurance that funds will be legally available to pay dividends at any given time or that, if funds are available, our Board will declare a dividend. Future dividends will depend on our future earnings and the ability of our regulated subsidiaries to pay cash dividends to us, which are subject to certain regulatory limitations and subject to charter and contractual limitations for some of those subsidiaries that may, in general, restrict the amount of retained earnings available for these dividends. These limitations, however, do not currently materially restrict payment of these dividends.

**Voting Rights** 

The holders of our common stock are entitled to one vote on each matter submitted for their vote at any meeting of our shareholders for each share of our common stock held as of the record date for the meeting. Under our Articles of Incorporation, the voting rights of our preferred stock may differ from the voting rights of our common stock. The holders of our common stock are not entitled to cumulate their votes for the election of directors.

Adoption of amendments to our Articles of Incorporation, adoption of a plan of merger, consolidation or reorganization, authorization of a sale or other disposition of all or substantially all of our assets not made in the usual and regular course of its business or adoption of a resolution of dissolution, and any other matter that would otherwise require a two-thirds approving vote, require the approval of a majority of the voting power of our outstanding shares.

In addition, the approval of a majority of the voting power of our outstanding shares must be obtained to amend or repeal the provisions of our Code of Regulations.

**Liquidation Rights** 

In the event of our dissolution or liquidation, the holders of our common stock will be entitled to receive, pro rata, after the prior rights of the holders of any issued and outstanding shares of our preferred stock have been satisfied, all of our assets that remain available for distribution after payment in full of all of our liabilities.

------

##### [**Table of Contents**](#toc)
**Preferred Stock** 

Our Articles of Incorporation give our Board authority to issue preferred stock from time to time in one or more classes or series and to fix the designations, powers, preferences, limitations and relative rights of any series of preferred stock that we choose to issue, including, without limitation, dividend rates, conversion rights, voting rights, terms of redemption and liquidation preferences and the number of shares constituting each such series. Such preferred stock could be issued with terms that could delay, defer or prevent a change of control of FirstEnergy. Prior to the issuance of a new series of preferred stock, we will amend our Articles of Incorporation, designating the stock of that series and the terms of that series. We will describe the terms of the preferred stock in the prospectus supplement for such offering, as applicable, and will file a copy of the amendment to our Articles of Incorporation establishing the terms of the preferred stock with the SEC.

**Ohio Law Anti-Takeover Provisions** 

Several provisions of the Ohio Revised Code, or ORC, may make it more difficult to acquire us by means of a tender offer, open market purchase, proxy fight or otherwise. These provisions include Chapter 1704 (Business Combinations), Section 1701.831 (Control Share Acquisitions) and Section 1707.041 (Control Bids). The ORC's Business Combination, Control Share Acquisition and Control Bids provisions are set forth in summary below. This summary does not purport to be complete and is subject to, and is qualified in its entirety by reference to, all sections of the ORC.

Chapter 1704 of the ORC applies to a broad range of business combinations between an Ohio corporation and an interested shareholder. The Ohio law definition of such business combinations includes mergers, consolidations, combinations, majority share acquisitions, certain asset transfers, issuances or transfers of shares, disproportionate transactions, and other transactions specified in the statute involving an interested shareholder or its affiliates or associates. An "interested shareholder" is defined as a shareholder who, directly or indirectly, exercises or directs the exercise of 10% or more of the voting power of the corporation in the election of directors.

Chapter 1704 restricts corporations from engaging in business combinations with interested shareholders, unless the articles of incorporation provide otherwise, for a period of three years following the date on which the shareholder became an interested shareholder, unless the directors of the corporation have approved the business combination or the interested shareholder's acquisition of shares of the corporation prior to the date the shareholder became an interested shareholder. After the initial three-year moratorium, Chapter 1704 prohibits such transactions absent approval by the directors of the interested shareholder's acquisition of shares of the corporation prior to the date that the shareholder became an interested shareholder, approval by disinterested shareholders of the corporation or the transaction meeting certain statutorily defined fair price provisions.

Under Section 1701.831 of the ORC, unless the articles of incorporation, the regulations adopted by the shareholders, or the regulations adopted by the directors pursuant to division (A)(1) of Section 1701.10 of the ORC provide otherwise, any control share acquisition of a corporation can only be made with the prior approval of the corporation's disinterested shareholders. A "control share acquisition" is defined as the acquisition, directly or indirectly, by any person of shares of a corporation that, when added to all other shares of that corporation in respect of which the person may exercise or direct the exercise of voting power, would enable that person, immediately after the acquisition, directly or indirectly, alone or with others, to exercise levels of voting power of the corporation in the election of directors in any of the following ranges: at least 20% but less than 33 1/3%; at least 33 1/3% but no more than 50%; or more than 50%.

We have not opted out of the application of either Chapter 1704 or Section 1701.831.

Section 1707.041 of the ORC regulates certain "control bids" for corporations in Ohio with certain concentrations of Ohio shareholders and permits the Ohio Division of Securities to suspend a control bid if

------

##### [**Table of Contents**](#toc)
certain information is not provided to offerees, the subject corporation and the Ohio Division of Securities. Control bids include the purchase of or offer to purchase any equity security of such a corporation from a resident of Ohio if, after the purchase of that security, the offeror would be directly or indirectly the beneficial owner of more than 10% of any class of issued and outstanding equity securities of the corporation. Information that must be provided in connection with a control bid includes a statement of any plans or proposals that the offeror, upon gaining control, may have to liquidate the subject corporation, sell its assets, effect a merger or consolidation of the corporation, establish, terminate, convert, or amend employee benefit plans, close any plant or facility of the subject corporation or of any of its subsidiaries or affiliates, change or reduce its work force or the work force of any of its subsidiaries or affiliates, or make any other major change in the corporation's business, corporate structure, management personnel or policies of employment.

**Anti-Takeover Effects** 

The rights or the provisions of Ohio law described above, individually or collectively, may discourage, deter, delay or impede a tender offer or other attempt to acquire control of FirstEnergy even if the transaction would result in the shareholders receiving a premium for their shares over current market prices or if the shareholders otherwise believe the transaction would be in their best interests.

In addition, our Code of Regulations contains certain advance notice provisions for which shareholders must comply in order to bring business before an annual meeting of shareholders or nominate candidates for our Board.

Shareholders must provide us advance notice of the introduction by them of business at annual meetings of our shareholders, including nominations of director candidates for our Board. For a shareholder to properly bring a proposal before an annual meeting, the shareholder must follow the advance notice procedures described in our Code of Regulations. In general, the shareholder must deliver a written notice to our Corporate Secretary describing the proposal and the shareholder's interest in the proposal not less than 30 nor more than 60 calendar days prior to the annual meeting. However, in the event public announcement of the date of the annual meeting is not made at least 70 calendar days prior to the date of the annual meeting, notice by the shareholder to be timely must be so received not later than the close of business on the 10th calendar day following the day on which public announcement is first made of the date of the annual meeting.

**Limitation on Directors' Liability** 

Under Section 1701.59(D) of the ORC, unless the articles or the regulations of a corporation state by specific reference that this provision of Ohio law does not apply, a director is liable for monetary damages for any action or omission as a director only if it is proven by clear and convincing evidence that this act or omission was undertaken either with deliberate intent to cause injury to the corporation or with reckless disregard for the best interests of the corporation. This provision, however, does not affect the liability of directors under Section 1701.95 of the ORC, which relates to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the payment of dividends or distributions, the making of distributions of assets to shareholders or the purchase
or redemption of the corporation's shares, contrary to the law or the corporation's articles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the distribution of assets to shareholders during the winding up of our affairs by dissolution or otherwise, if
creditors are not adequately provided for; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the making of certain loans to officers, directors or shareholders, other than in the usual course of business,
without approval by a majority of the disinterested directors of the corporation who determined that the loan could reasonably be expected to benefit the corporation.

Section 1701.59(D) applies to our Board because our Articles of Incorporation and Code of Regulations do not specifically exclude its applicability. This may have the effect of reducing the likelihood of derivative litigation

------

##### [**Table of Contents**](#toc)
against directors, and may discourage or deter shareholders or management from bringing a lawsuit against directors based on their actions or omissions, even though such a lawsuit, if successful, might otherwise have benefited us and our shareholders.

**Preemptive or Conversion Rights** 

Holders of our common stock have no preemptive or conversion rights and are not subject to further calls or assessments by us. There are no redemption or sinking fund provisions applicable to our common stock.

**Listing** 

Shares of our common stock are traded on the NYSE under the symbol "FE."

**Transfer Agent and Registrar** 

The Transfer Agent and Registrar for our common stock is Equiniti Trust Co LLC, 48 Wall Street, 23<sup>rd</sup> Floor, New York, New York, 10043.

**Tax Considerations** 

The prospectus supplement relating to an issuance of securities will describe certain material United States federal income tax considerations relevant to such securities.

------

##### [**Table of Contents**](#toc)
**DESCRIPTION OF DEPOSITARY SHARES** 

We may offer depositary shares (either separately or together with other securities) representing fractional interests in our preferred stock of any series. The following description sets forth certain general terms and provisions of the depositary shares to which any prospectus supplement may relate. The particular terms of the depositary shares to which any prospectus supplement may relate and the extent, if any, to which the general terms and provisions may apply to the depositary shares so offered will be described in the applicable prospectus supplement. To the extent that any particular terms of the depositary shares, deposit agreements and depositary receipts described in a prospectus supplement differ from any of the terms described below, then the terms described below will be deemed to have been superseded by that prospectus supplement. We encourage you to read the applicable deposit agreement and depositary receipts for additional information before you decide whether to purchase any of our depositary shares.

In connection with the issuance of any depositary shares, we will enter into a deposit agreement with a bank or trust company, as depositary, which will be named in the applicable prospectus supplement. Depositary shares will be evidenced by depositary receipts issued pursuant to the related deposit agreement. Immediately following our issuance of the security related to the depositary shares, we will deposit the shares of our preferred stock with the relevant depositary and will cause the depositary to issue, on our behalf, the related depositary receipts. Subject to the terms of the deposit agreement, each owner of a depositary receipt will be entitled, in proportion to the fractional interest in the share of preferred stock represented by the related depositary share, to all the rights, preferences and privileges of, and will be subject to all of the limitations and restrictions on, the preferred stock represented by the depositary receipt (including, if applicable, dividend, voting, conversion, exchange, redemption, sinking fund, subscription and liquidation rights). To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the depositary shares offered thereby. The terms of any offered depositary shares will be described in a supplement to this prospectus.

**DESCRIPTION OF WARRANTS** 

We may issue warrants to purchase debt securities, common stock, preferred stock, depositary shares, or any combination thereof, with or without the payment of separate consideration therefor (including by means of a dividend or similar distribution to holders of our outstanding securities). We may issue warrants independently or together with any other securities offered by a prospectus supplement. Warrants may be attached to or separate from such securities and may or may not be transferable. Each series of warrants will be issued under a separate warrant agreement we will enter into with a warrant agent specified in the applicable prospectus supplement. The warrant agent will act solely as our agent in connection with the warrants of a particular series and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants. In connection with any warrants, we may enter into a standby underwriting agreement with one or more underwriters pursuant to which the underwriters will agree to purchase any securities underlying such warrants that remain unpurchased upon the expiration of such warrants. To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the warrants offered thereby.

**DESCRIPTION OF RIGHTS** 

We may issue subscription rights to purchase shares of our common stock or preferred stock. These subscription rights may be issued independently or together with any other security offered hereby and may or may not be transferable by the shareholder receiving the subscription rights in such offering. In connection with any offering of subscription rights, we may enter into a standby arrangement with one or more underwriters or other investors pursuant to which the underwriters or other investors may be required to purchase any securities remaining unsubscribed for after such offering. To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the rights offered thereby.

------

##### [**Table of Contents**](#toc)
**DESCRIPTION OF PURCHASE CONTRACTS** 

We may issue purchase contracts, including contracts obligating holders to purchase from us, and for us to sell to holders, a specific or varying number of debt securities, shares of our common stock or preferred stock, depositary shares, warrants, rights or other property or any combination of the above, at a future date or dates. Alternatively, the purchase contracts may obligate us to purchase from holders, and obligate holders to sell to us, a specific or varying number of debt securities, shares of our common stock or preferred stock, depositary shares, warrants, rights or other property. The price of such debt securities, shares of our common stock or preferred stock, depositary shares, warrants, rights or other property may be fixed at the time the purchase contracts are issued or may be determined by reference to a specific formula described in the purchase contracts. We may issue purchase contracts separately or as a part of units each consisting of a purchase contract and one or more of our other securities described in this prospectus or debt obligations of third parties, such as U.S. Treasury securities, securing the holder's obligations under the purchase contract. The purchase contracts may require us to make periodic payments to holders or vice versa and the payments may be unsecured or pre-funded on some basis. The purchase contracts may require holders to secure the holder's obligations in a specified manner that we will file with the SEC in connection with a public offering relating to the purchase contracts. To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the purchase contracts offered thereby.

**DESCRIPTION OF UNITS** 

We may issue units comprising one or more securities described in this prospectus in any combination. Units may also include debt obligations of third parties, such as U.S. Treasury securities. Each unit may be issued so that the holder of the unit also is the holder of each security included in the unit. Thus, the unit may have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately at any time or at any time before a specified date. To the extent appropriate, the applicable prospectus supplement will describe the specific terms of the units offered thereby.

------

##### [**Table of Contents**](#toc)
**PLAN OF DISTRIBUTION** 

**Initial Offering and Sale of Securities** 

We may sell securities through one or more underwriters or dealers, directly to one or more purchasers, in a rights offering, in "at-the-market" offerings, within the meaning of Rule 415(a)(4) of the Securities Act of 1933, as amended, or the Securities Act, to or through a market maker or into an existing trading market or an exchange or otherwise, through agents, pursuant to forward contracts or through a combination of any of these sale methods, or through any other methods described in a prospectus supplement. The prospectus supplement relating to the securities being offered will set forth the terms of the offering and the method of distribution, including:

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the purchase price of the securities and the proceeds to us from the sale, if any;

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any public offering price;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any discounts or concessions allowed or reallowed or paid to dealers or agents; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any securities exchange or market on which the securities may be listed.

We may distribute the securities offered under this prospectus from time to time in one or more transactions at a fixed price or prices, which may be changed, at prevailing markets prices or at prices determined as the prospectus supplement specifies. We may sell securities through forward contracts or similar arrangements.

Securities may be offered to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. If we use underwriters for a sale of securities, we will enter into an underwriting agreement with the underwriters at the time of sale of those securities. Unless we inform you otherwise in a prospectus supplement, the obligations of the underwriters to purchase the offered securities will be subject to certain conditions and the underwriters will be obligated to purchase all of the offered securities if any are purchased. The underwriters will acquire the securities for their own account. The underwriters may resell the securities in one or more transactions at a fixed public offering price, at market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or re-allowed or paid to dealers. Only those underwriters identified in the prospectus supplement are deemed to be underwriters in connection with the securities offered in the prospectus supplement.

If we use dealers in a sale, unless we inform you otherwise in a prospectus supplement, we will sell the securities to the dealers as principals.

The dealers may then resell such securities to the public at varying prices that they determine at the time of resale.

We may sell the securities directly. In such case, no underwriters or agents would be involved. We may also sell the securities through agents designated from time to time. In the prospectus supplement, we will name any agent involved in the offer or sale of the offered securities, and we will describe any commissions payable to the agent. Unless we inform you otherwise in the prospectus supplement, any agent will agree to use its reasonable best efforts to solicit purchases for the period of its appointment.

We may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We will describe the terms of any sales of these securities in the prospectus supplement.

------

##### [**Table of Contents**](#toc)
In connection with the sale of securities, underwriters, dealers or agents may be deemed to have received compensation from us in the form of underwriting discounts or commissions and also may receive commissions from securities purchasers for whom they may act as agent.

Underwriters may sell the securities to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters or commissions from the purchasers for whom they may act as agent. Any underwriting or other compensation which we pay to underwriters or agents in connection with the securities offering, and any discounts, concessions or commissions which underwriters allow to dealers, will be set forth in the applicable prospectus supplement.

Underwriters, dealers and agents participating in the securities distribution may be deemed to be underwriters, and any discounts and commissions they receive and any profit they realize on the resale of the securities may be deemed to be underwriting discounts and commissions under the Securities Act. Underwriters, and their controlling persons, and agents may be entitled, under agreements we enter into with them, to indemnification against certain civil liabilities, including liabilities under the Securities Act. Some of the underwriters, dealers or agents and some of their affiliates who participate in the securities distribution may engage in other transactions with, and perform other services for, us and our subsidiaries or affiliates in the ordinary course of business.

In order to facilitate an offering of securities, persons participating in the offering may engage in transactions that stabilize, maintain or otherwise affect the price of the offered securities. Such transactions, if commenced, may be discontinued at any time. If any such activities will occur, they will be described in the applicable prospectus supplement.

We may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and will be identified in the applicable prospectus supplement.

------

##### [**Table of Contents**](#toc)
**LEGAL MATTERS** 

Unless otherwise indicated in the applicable prospectus supplement, legal opinions relating to the validity of the securities being offered by this prospectus will be rendered by our counsel, Morgan, Lewis & Bockius LLP, New York, New York, or James A. Arcuri, Esq., Vice President, Associate General Counsel of FirstEnergy Service Company, one of our affiliates. Mr. Arcuri is the beneficial owner of less than 1% of our common stock.

Unless otherwise indicated in the applicable prospectus supplement, certain other legal matters will be passed upon for us by Morgan, Lewis & Bockius LLP. Additional legal matters may be passed on for us, or any underwriters, dealers or agents, by counsel we will name in the applicable prospectus supplement.

**EXPERTS** 

The financial statements and management's assessment of the effectiveness of internal control over financial reporting (which is included in Management's Report on Internal Control over Financial Reporting) incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended December 31, 2025 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

------

##### [**Table of Contents**](#toc)
**PART II** 

**INFORMATION NOT REQUIRED IN PROSPECTUS** 

**Item 14.** ***Other Expenses of Issuance and Distribution*** <br>

The following table sets forth the expenses (other than underwriting discounts and commissions) expected to be incurred in connection with the offerings described in this registration statement.

---

| | |
|:---|:---|
|  SEC registration fee | $414300.00 |
|  Legal fees and expenses | $\* |
|  Blue sky fees and expenses | $\* |
|  Accounting fees and expenses | $\* |
|  Rating agencies' fees and expenses | $\* |
|  Stock exchange listing fees | $\* |
|  Printing fees and expenses | $\* |
|  Trustees' fees and expenses | $\* |
|  Miscellaneous | $\* |
|  Total | $\* |

---

\* Estimated expenses not presently known. Each prospectus supplement will reflect estimated expenses based on the amount of the related offering. 

**Item 15.** ***Indemnification of Directors and Officers*** <br>

***Ohio Revised Code***. Section 1701.13(E) of the Ohio Revised Code, or ORC, provides that an Ohio corporation may indemnify any person who was or is a party, or is threatened to be made a party, to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that the person is or was a director, officer, employee or agent of that corporation, or is or was serving at the request of the corporation as a director, trustee, officer, employee, member, manager, or agent of another entity against expenses, judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding, if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and with respect to any criminal matter, if the person had no reasonable cause to believe the person's conduct was unlawful. In addition, no indemnification shall be made in respect of a claim against such person by or in the right of the corporation, if the person is adjudged to be liable for negligence or misconduct in the performance of the person's duty to the corporation except to the extent provided in the court order. Indemnification may be made if ordered by a court or authorized in each specific case by the directors of the indemnifying corporation acting at a meeting at which, for the purpose, any director who is a party to or threatened with any such action, suit or proceeding may not be counted in determining the existence of a quorum and may not vote. If, because of the foregoing limitations, the directors are unable to act in this regard, such determination may be made by written opinion of independent legal counsel other than an attorney, or a firm having associated with it an attorney, who has been retained by or who has performed services for the corporation or any person to be indemnified during the five years preceding the date of determination. Alternatively, such determination may be made by the corporation's shareholders.

Section 1701.13(E) of the ORC provides that the indemnification thereby permitted shall not be exclusive of any other rights that directors, officers or employees may have, including rights under insurance purchased by the corporation. Further, a right to indemnification or to advancement of expenses arising under a provision of the articles or the regulations of a corporation may not be eliminated or impaired by an amendment to that provision after the occurrence of the act or omission that becomes the subject of the civil, criminal, administrative, or investigative action, suit, or proceeding for which the indemnification or advancement of expenses is sought, unless the provision in effect at the time of that act or omission explicitly authorizes that elimination or impairment after the act or omission has occurred.

------

##### [**Table of Contents**](#toc)
***Third Amended and Restated Code of Regulations***. Regulation 31 of the registrant's Third Amended and Restated Code of Regulations provides as follows:

"The Corporation shall indemnify, to the full extent then permitted by law, any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he is or was a member of the Board of Directors or an officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, trustee, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise. The Corporation shall pay, to the full extent then required by law, expenses, including attorney's fees, incurred by a member of the Board of Directors in defending any such action, suit or proceeding as they are incurred, in advance of the final disposition thereof, and may pay, in the same manner and to the full extent then permitted by law, such expenses incurred by any other person. The indemnification and payment of expenses provided hereby shall not be exclusive of, and shall be in addition to, any other rights granted to those seeking indemnification under any law, the Articles of Incorporation, any agreement, vote of shareholders or disinterested members of the Board of Directors, or otherwise, both as to action in official capacities and as to action in another capacity while he or she is a member of the Board of Directors, or an officer, employee or agent of the Corporation, and shall continue as to a person who has ceased to be a member of the Board of Directors, trustee, officer, employee or agent and shall inure to the benefit of the heirs, executors and administrators of such a person."

Regulation 32 of the registrant's Third Amended and Restated Code of Regulations provides as follows:

"The Corporation may, to the full extent then permitted by law and authorized by the Board of Directors, purchase and maintain insurance or furnish similar protection, including but not limited to trust funds, letters of credit or self-insurance, on behalf of or for any persons described in Regulation 31 against any liability asserted against and incurred by any such person in any such capacity, or arising out of his status as such, whether or not the Corporation would have the power to indemnify such person against such liability. Insurance may be purchased from or maintained with a person in which the Corporation has a financial interest."

***Directors and Officers Liability Insurance***. The registrant maintains and pays the premium on contracts insuring it (with certain exclusions) against any liability to directors and officers it may incur under the above indemnity provisions and insuring each of its directors and officers (with certain exclusions) against liability and expense, including legal fees, which he or she may incur by reason of his or her relationship to it.

***Indemnification Agreements***. The registrant has entered into indemnification agreements with its directors and officers, the forms of which are incorporated by reference to Exhibit 10.1 of the registrant's Current Report on Form 8-K filed May 16, 2018. Each indemnification agreement provides, among other things, that the registrant will, subject to the agreement terms, indemnify a director or officer, as applicable, if, by reason of the individual's status as a director or officer, the person incurs losses, liabilities, judgments, fines, penalties, or amounts paid in settlement in connection with any threatened, pending, or completed proceeding, whether of a civil, criminal, administrative, or investigative nature. In addition, each indemnification agreement provides for the advancement of expenses incurred by a director or officer, as applicable, subject to certain exceptions, in connection with proceedings covered by the indemnification agreement. As a director and officer of the registrant, Brian X. Tierney has an agreement that addresses indemnity in both roles.

**Item 16.** ***Exhibits*** <br>

Reference is made to the information contained in the Exhibit Index filed as part of this Registration Statement.

------

##### [**Table of Contents**](#toc)
**Item 17.** ***Undertakings*** <br>

The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement;

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

*provided, however*, that paragraphs (i), (ii) and (iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

(i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which the prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify

------

##### [**Table of Contents**](#toc)
any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

(5) That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by an undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(6) That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted 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 Securities Act of 1933 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 the successful defense of any action, suit or proceeding) is asserted 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 Securities Act of 1933 and will be governed by the final adjudication of such issue.

------

##### [**Table of Contents**](#toc)
**EXHIBIT INDEX** 

---

| | |
|:---|:---|
| Exhibit <br>Number | Description |
| 1(a)\* | Form of Underwriting Agreement (Equity Securities) |
| 1(b)\* | Form of Underwriting Agreement (Debt Securities) |
| 1(c)\* | Form of Underwriting Agreement or Purchase Agreement (Depositary Shares, Warrants, Rights, Purchase Contracts, or Units) |
| 4(a)\*\* | [Amended and Restated Articles of Incorporation of FirstEnergy Corp. (incorporated by reference to FirstEnergy's Form 10-Q filed July 23, 2019, Exhibit 3.1, File No. 333-21011)](http://www.sec.gov/Archives/edgar/data/1031296/000103129619000034/q22019-ex3x1.htm) |
| 4(b)\*\* | [Third Amended and Restated Code of Regulations of FirstEnergy Corp., effective May 17, 2022 (incorporated by reference to FirstEnergy's Form 8-K filed May 23, 2022, Exhibit 3.1, File No. 333-21011)](http://www.sec.gov/Archives/edgar/data/1031296/000103129622000028/a8-kx52022exhibit31.htm) |
| 4(c)\*\* | [Amendment to the Third Amended and Restated Code of Regulations (incorporated by reference to FirstEnergy's Form 10-Q filed August 1, 2023, Exhibit 3.1, File No. 333-21011)](http://www.sec.gov/Archives/edgar/data/1031296/000103129623000054/q22023-ex31.htm) |
| 4(d)\*\* | [Form of Common Stock Certificate (incorporated by reference to FirstEnergy's Form S-3/A filed November 24, 1997, Exhibit 4(c), File No. 333-40063)](http://www.sec.gov/Archives/edgar/data/1031296/0000950152-97-008255.txt) |
| 4(e)\*\* | [Indenture, dated as of November 15, 2001, between FirstEnergy Corp. and The Bank of New York Mellon Trust Company, N.A., as successor trustee (incorporated by reference to FirstEnergy's Form S-3 filed September 21, 2001, Exhibit 4(a), File No. 333-69856)](http://www.sec.gov/Archives/edgar/data/1031296/000091205701533070/a2059691zex-4_a.txt) |
| 4(f)\* | Form of Debt Securities |
| 4(g)\* | Form of Certificate of Designation for Preferred Stock |
| 4(h)\* | Form of Preferred Stock Certificate |
| 4(i)\* | Form of Depositary Agreement |
| 4(j)\* | Form of Equity Warrant Agreement |
| 4(k)\* | Form of Equity Warrant |
| 4(l)\* | Form of Debt Warrant Agreement |
| 4(m)\* | Form of Debt Warrant |
| 4(n)\* | Form of Rights Certificate |
| 4(o)\* | Form of Purchase Contract |
| 4(p)\* | Form of Unit |
| 5(a)\*\*\* | [Opinion of James A. Arcuri](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dex5a.htm) |
| 5(b)\*\*\* | [Opinion of Morgan, Lewis & Bockius LLP](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dex5b.htm) |
| 23(a)\*\*\* | [Consent of PricewaterhouseCoopers LLP](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dex23a.htm) |
| 23(b)\*\*\* | [Consent of James A. Arcuri (included in Exhibit 5(a))](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dex5a.htm) |
| 23(c)\*\*\* | [Consent of Morgan, Lewis & Bockius LLP (included in Exhibit 5(b))](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dex5b.htm) |
| 24\*\*\* | [Power of Attorney (included on the signature page to the initial filing of this registration statement)](http://www.sec.gov/Archives/edgar/data/1031296/000119312526248378/d57576ds3.htm#sig) |
| 25\*\*\* | [Form T-1 Statement of Eligibility of The Bank of New York Mellon Trust Company, N.A., as trustee for the Indenture dated as of November 15, 2001.](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dex25.htm) |
| 107\*\*\* | [Filing Fee Table](http://www.sec.gov/Archives/edgar/data/0001031296/000119312526248378/d57576dexfilingfees.htm) |

---

\* To be filed by amendment or as an exhibit to a document to be incorporated by reference herein in connection with the issuance of securities.

\*\* Incorporated by reference herein as indicated.

\*\*\* Previously filed.

------

##### [**Table of Contents**](#toc)
**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Akron, State of Ohio, on the 8th day of June, 2026.

---

| | |
|:---|:---|
| FIRSTENERGY CORP. | FIRSTENERGY CORP. |
| By: | /s/ K. Jon Taylor |
|  | K. Jon Taylor |
|  | Senior Vice President and Chief Financial Officer and Strategy |

---

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the date indicated:

---

| | |
|:---|:---|
| **Signature** | **Title(s)** |
| \*<br> Brian X. Tierney | Chairman, President and Chief Executive Officer<br>(Principal Executive Officer) |
| \*<br> K. Jon Taylor | Senior Vice President and Chief Financial Officer and Strategy<br>(Principal Financial Officer) |
| \*<br> Jason J. Lisowski | Vice President, Controller and Chief Accounting Officer<br>(Principal Accounting Officer) |
| \*<br> Lisa Winston Hicks | Lead Independent Director |
| \*<br> Heidi L. Boyd | Director |
| \*<br> Jana T. Croom | Director |
| \*<br> Steven J. Demetriou | Director |
| \*<br> Paul Kaleta | Director |
| \*<br> James F. O'Neil III | Director |
| \*<br> John W. Somerhalder II | Director |

---

------

##### [**Table of Contents**](#toc)
\* Leslie M. Turner Director

Date: June 8, 2026

\* The undersigned by signing his name hereto does sign and execute this Amendment No. 1 to the registration statement on Form S-3 pursuant to the Power of Attorney executed by the above-named directors and officers of the registrant, which has been filed with the initial filing of this registration statement on behalf of such directors and officers. 

---

| | |
|:---|:---|
| By: | /s/ K. Jon Taylor |
|  | K. Jon Taylor |
|  | Attorney-in-Fact |

---