EVERSOURCE ENERGY

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APPENDIX A​

EVERSOURCE ENERGY

PROPOSED REVISIONS TO THE

DECLARATION OF TRUST

The specific Articles of the Eversource Energy Declaration of Trust proposed for amendment, as described in Item 4 of the proxy statement, are listed below.

SUPERMAJORITY PROVISIONS

In each Article listed below, the phrase “two-thirds (2/3)” will be deleted and replaced with “a majority.” Text that will be deleted is shown with a strikethrough, while text that will be inserted is underlined and bolded.

Article 11(d):

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“(11) Until the termination of the trust hereby created, the Trustees in the control and management of the trust estate and in the conduct of the business of the association shall have power at any time and from time to time, subject however to the limitations and conditions herein contained in this or any other article hereof:

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(d) To borrow money and to issue bonds or other obligations therefor and to secure the payment thereof by mortgage, pledge or charge of the whole or any part of the trust estate then owned or thereafter acquired, except that no such mortgage, pledge or charge of the trust estate as a whole or substantially as a whole shall be created unless authorized in each and every such case by a vote of at leasttwo-thirds (2/3) a majority in number of all the shares then outstanding hereunder of such class or classes as then have general voting power, provided, however, that no such authorization shall be required to secure bonds or obligations issued to refund at any time and in any manner any secured bonds or obligations whenever issued.”

Article 19:

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“(19) The transferable certificate of beneficial interest known as shares issued or to be issued hereunder may consist either of common shares with or without par value or of preferred shares with or without par value of any class or classes, or of both common and preferred shares. Shares, either common or preferred, may be issued from time to time for cash, property or services, or as a distribution to Shareholders, and may be issued by the Trustees only upon authority so to do granted by the Shareholders. Common shares, in addition to the three million (3,000,000) of such common shares authorized by the Shareholders prior to March 18, 1964, shall be issued only when authorized by the affirmative vote of at least a majority in interest of all shares previously issued and then outstanding of such class or classes as have general voting power. Preferred shares shall be issued only when authorized by the affirmative vote of at leasttwo-thirds (2/3) a majority in interest of shares having general voting power as aforesaid and also by such vote or consent of the holders of each class of preferred shares previously issued and then outstanding as may be required by the rights, privileges and preferences of said outstanding class established as hereinafter provided. All preferred shares issued shall have such par value, if any, such priority as to dividends which may be cumulative, such priority in liquidation, such voting rights and such other rights, privileges, preferences, restrictions and limitations as may be established and authorized by the votes and consents of Shareholders pursuant to which they are issued. The holders of common shares shall have preemptive rights as follows: Upon the offering or sale by the Trustees for cash of any common shares or convertible securities each holder of common shares shall have the preemptive right subject to the provisions of this Article to purchase such shares or convertible securities in proportion to the number of common shares held by him, within the time and on the terms fixed by the Trustees. Such preemptive rights, however, shall not be applicable to the issue of common shares, or the grant of rights or options on such shares, to Trustees, Directors, officers, or employees, as such, of the association, or of a subsidiary thereof, if such issue or grant is approved by the holders of common shares, at a meeting duly held for the purpose or is authorized by and consistent with a plan theretofore so approved. Whenever any rights to subscribe to common shares or convertible securities have not been exercised by the holders thereof, and by the terms thereof such subscription rights have ceased to be exercisable, the Trustees may authorize the disposal of the common shares or convertible securities theretofore subject to such unexercised rights in such manner as the Trustees may deem proper.

A-12025 Proxy Statement

Common shares shall not be subject to preemptive rights if they are issued on the conversion of convertible securities and such securities were offered or issued to holders of common shares in satisfaction of their preemptive rights or were not subject to preemptive rights. Common shares and convertible securities shall not be subject to preemptive rights if they are (1) common shares or convertible securities theretofore offered to holders of common shares in satisfaction of their preemptive rights and not purchased thereby; (2) issued pursuant to a plan adjusting any rights to fractional shares or fractional interests in order to prevent the issue of such fractional shares or fractional interests in such shares; (3) issued in connection with a merger or consolidation, or pursuant to order of a court of competent jurisdiction unless such order otherwise provides; (4) issued in a public offering or to or through underwriters who shall have agreed to make a public offering of such common shares or convertible securities; (5) released from such preemptive rights by the affirmative vote or written consent of the holders of at leasttwo-thirds (2/3) a majority of the common shares then outstanding; or (6) shares or convertible securities held in the treasury. Except as herein specifically provided, no holder of shares of any class shall have any preemptive rights to subscribe to any shares or securities of any class issued at any time. No fractional shares shall be issued and in connection with the issue of shares of any class the Trustees may take such action as they deem desirable in order to avoid or prevent the issue of fractional shares. As used in this Article “convertible securities” means securities which are convertible into, or entitle the holder thereof to purchase, common shares.”

Article 39:

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“(39) The trust hereby created may be terminated at any time and any of the terms, powers, and provisions herein contained may be altered, amended, added to, or rescinded at any time by the affirmative vote of at leasttwo-thirds (2/3) a majority of the Trustees but any such termination or alteration, amendment, addition or rescission before becoming effective shall be approved either by the affirmative vote or the consent thereto in writing of the holders oftwo-thirds (2/3) a majority of all shares previously issued and then outstanding of such class or classes as have general voting power; provided however that no alteration, amendment, addition or rescission adversely affecting the preferences or priorities of any preferred shares then outstanding shall become effective without the affirmative vote or the consent in writing, if such consent be provided for, of the holders of at leasttwo-thirds (2/3) a majority of the preferred shares the preferences or priorities of which are so affected.”

VIRTUAL ANNUAL MEETING PROVISIONS

Article 28, listed below, will be revised to allow to virtual annual and special meetings of shareholders to be conducted by Eversource Energy by adding language that allows annual and special meetings of shareholders to be held in person or virtually, as the Board may determine. Text that will be inserted is underlined and bolded.

Article 28

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“(28) An annual meeting of the Shareholders shall be held during the month of April, May or June in each year on such day and at such hour as the Trustees may from time to time determine, at such place either within or outside of Massachusetts as may be designated by the Trustees, for the purpose of electing new Trustees in place of and to succeed those whose terms of office expire at that time and for such other purposes as may be specified by the Trustees. Annual and special meetings of shareholders may be held solely by means of remote communication, or in a hybrid format that includes both physical and remote participation, as permitted by applicable law. If a meeting is conducted wholly or partially by remote communication, reasonable measures shall be implemented to (i) verify shareholder identity by ensuring that each person deemed present and entitled to vote at the meeting is a shareholder or a valid proxyholder, (ii) provide shareholders a reasonable opportunity to participate in the meeting, including the ability to hear and be heard, vote, and ask questions in real time, and (iii) maintain a record of votes and other shareholder actions taken during the meeting. The Trustees shall have sole discretion to determine whether any meeting of shareholders will be held in person, virtually, or in a hybrid format, subject to applicable laws and regulations. Notice of the meeting shall specify the format and provide the necessary information for shareholders to access and participate. If such annual meeting shall not be held as above provided, a special meeting may be held in lieu thereof at any time and any business which might have been transacted at such annual meeting may be transacted at such special meeting and for all purposes hereof such special meeting shall be deemed to be an annual meeting duly held as herein provided. Special meetings of the Shareholders shall be held whenever ordered by the Trustees, the Chairman of the Board or the President or requested by the holders of one-tenth (1/10) in interest of all the shares outstanding of any class or classes having the general right to vote and any business which may be transacted at an annual meeting of Shareholders may be transacted at a special meeting. Special meetings shall be held at such place as may be designated by the Trustees or the Chairman of the Board or the President. Notice of each meeting of the Shareholders, whether annual or special, specifying the time, place and purposes thereof, shall be given to all Shareholders entitled to vote thereat by delivering such notice to such Shareholders at least seven (7) days before such meeting. Notice delivered

2025 Proxy Statement A-2 via electronic transmission shall be considered notice for purposes of the preceding sentence provided that such notice is, (i) if given by facsimile telecommunication, directed to a number furnished by the Shareholder for such purpose, (ii) if given by electronic mail, directed to an electronic mail address furnished by the Shareholder for such purpose, (iii) if delivered by posting on an electronic network accompanied by a separate notice to the Shareholder of such posting, directed to an electronic mail address furnished by the Shareholder for the purpose, and (iv) if by any other form of electronic transmission, directed to the Shareholder in such manner as the Shareholder shall have specified. For purposes of this paragraph “electronic transmission” means any process of communication not directly involving the physical transfer of paper that is suitable for the retention, retrieval and reproduction of information by the recipient. If the Secretary shall refuse or fail to give any such notice of any special meeting such notices may be given by the persons or person by whom such meeting was called or requested. At all meetings of the Shareholders every holder of common shares shall have one (1) vote for every such share held by him, and every holder of preferred shares of any class or classes thereof shall have such voting rights as may be authorized in accordance with the provisions of Article (19). Every Shareholder entitled to vote at any meeting shall have the same right to vote thereat or at any adjournment or adjournments thereof, either in person or by proxy as in the case of a stockholder in a corporation. Any vote, consent, waiver, proxy appointment or other action by a Shareholder or by the proxy or other agent of any Shareholder, shall be considered given in writing, dated and signed if, in lieu of any other means permitted by this Declaration of Trust, it consists of an electronic transmission that sets forth or is delivered with information from which it can be determined (i) that the electronic transmission was transmitted by the Shareholder, proxy or agent or by a person authorized to act for the Shareholder, proxy or agent; and (ii) the date on which such Shareholder, proxy, agent or authorized person transmitted the electronic transmission. The date on which the electronic transmission is transmitted shall be considered to be the date on which it was signed. The electronic transmission shall be considered received if it has been sent to any address specified for the purpose or, if no address has been specified, to the principal office of the association, addressed to the Secretary or other officer or agent having custody of the records of proceedings of Shareholders. At all meetings a majority of all shares issued and outstanding and having the general right to vote shall constitute a quorum for the transaction of business, but less than such majority may adjourn the meeting from time to time and the meeting may be held as adjourned without further notice. When a quorum is present at any meeting all matters properly brought before the meeting shall be decided by the majority vote of the Shareholders present or represented at such meeting and voting upon such questions, except as otherwise provided herein and as may be otherwise provided hereafter as to particular questions in the provisions for the establishment of the rights, privileges and preferences of any class or classes of preferred shares. The Trustees may fix in advance a time not more than sixty (60) days before the date of any meeting of the Shareholders or the date for the payment of any dividend or the making of any distribution of any kind to Shareholders or the last day on which the consent or dissent of Shareholders may be effectively expressed for any purpose as the record date for determining the Shareholders having the right to notice of and to vote at such meeting, and any adjournment thereof, or the right to receive such dividend or distribution or the right to give such consent or dissent, and in such case only Shareholders of record on such record date shall have such right, notwithstanding any transfer of shares on the books of the association after the record date. In lieu of fixing such record date, the Trustees may for any of such purposes close the transfer books of the association for all or any portion of said sixty (60) day period.”

A-32025 Proxy Statement

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MMMMMMMMMMMM MMMMMMMMMMMMMM C123456789 ENDORSEMENT_LINE SACKPACK 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 ADD 6 Using a black ink pen, mark your votes with an X as shown in this example. Please do not write outside the designated areas. 2025 Annual Meeting Proxy Card Your vote matters – here’s how to vote! You may vote online or by phone instead of mailing this card. Votes from participants in the Eversource 401K Plan or the Savings Plan for Employees of Aquarion Water Company must be received by April 29, 2025, at 12:01 a.m., Eastern Time. OInf lninoeelectronic voting, Gdoetloetwe wQwR.ecnovdiesiaonndrecpoonrttrso.lc#om/ES or scan the QR code — login details are located in the shaded bar below. Phone Call toll free 1-800-652-VOTE (8683) within the USA, US territories and Canada Save paper, time and money! Sign up for electronic delivery at www.envisionreports.com/ES 1234 5678 9012 345 ▼ IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.▼ A Items — The Board of Trustees recommends a vote FOR all nominees, FOR Items 2, 3, and 4, and AGAINST Item 5. 1. Election of Trustees: For Against Abstain For Against Abstain For Against Abstain 01 - Cotton M. Cleveland 04 - Loretta D. Keane 07 - Joseph R. Nolan, Jr. 02 - Linda Dorcena Forry 05 - John Y. Kim 08 - Daniel J. Nova 03 - Gregory M. Jones 06 - David H. Long 09 - Frederica M. Williams 2. Consider an advisory proposal approving the compensation of our Named Executive Officers. For Against Abstain For Against Abstain 3. Ratify the selection of Deloitte & Touche LLP as our independent registered public accounting firm for 2025. 4. Approve proposed amendments to our Declaration of Trust to eliminate supermajority voting requirements and allow virtual annual meetings of shareholders. For Against Abstain For Against Abstain 5. Vote on a shareholder proposal titled “Support an Independent Board Chairman,” if properly brought before the meeting. 6. Transact any other business that may properly come before the meeting or any adjournment thereof. B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below. Please sign exactly as name(s) appear(s) above. Joint owners should each sign. When signing as attorney, executor, administrator, corporate officer, trustee, guardian, or custodian, please give full title. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. MMMMMMM C 1234567890 J N T 1 P C F 6 4 5 1 8 4 MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE 140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND 04431D

You can access your account online. You can access your registered shareholder information on the following secure Internet site: http://www.computershare.com/investor Step 1: Register (1st time users only) Step 3: View your account details and perform multiple transactions, such as: Click on “Register” and follow the instructions. Step 2: Log In (Returning users) Click “Login” and follow the instructions. • View account balances • View transaction history • View payment history • View common share quotes • Change your address • View electronic shareholder communications • Buy or sell shares • Request check replacements If you are not an Internet user and wish to contact Computershare, you may use one of the following methods: Call: 1-800-999-7269 Write: Computershare Investor Services, P.O. Box 43078, Providence, RI 02940-3078 Important notice regarding the Internet availability of proxy materials for the Annual Meeting of Shareholders The proxy statement and 2024 Annual Report to shareholders are available at www.envisionreports.com/ES Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/ES ▼ IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.▼ Proxy/Vote Authorization Form – EVERSOURCE ENERGY Annual Meeting of Shareholders May 1, 2025 Proxy/Vote Authorization Form is Solicited by the Board of Trustees of the Company The undersigned appoints Joseph R. Nolan, Jr. and Gregory B. Butler, and each of them, proxies of the undersigned, with power to act without the other and full power of substitution, to act for and to vote all common shares of Eversource Energy that the undersigned would be entitled to cast if present in person at the 2025 Annual Meeting of Shareholders to be held on May 1, 2025, and at any postponement or adjournment thereof, upon the matters indicated on the reverse side of this card. This card also constitutes voting instructions for participants in the Eversource 401K Plan and the Savings Plan for Employees of Aquarion Water Company. The undersigned hereby directs the applicable trustee to vote all common shares credited to the undersigned’s account at the Annual Meeting and any adjournment thereof. THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED AS DIRECTED OR, IF NO DIRECTION IS GIVEN, THE PROXIES WILL VOTE YOUR COMMON SHARES CONSISTENT WITH THE RECOMMENDATIONS OF OUR BOARD OF TRUSTEES AND IN THEIR DISCRETION ON SUCH OTHER BUSINESS AS MAY PROPERLY COME BEFORE THE MEETING OR ANY ADJOURNMENT OR POSTPONEMENT THEREOF. (Items to be voted appear on reverse side) C Non-Voting Items Change of Address — Please print new address below. Comments — Please print your comments below.