EXELON CORP

Availability of Corporate Documents

The Exelon Corporate Governance Principles, the Exelon Code of Business Conduct, the Exelon Amended and Restated Bylaws, and the charters for each of the standing Committees of the Board of Directors are available on the Exelon website atwww.exeloncorp.com. Copies are available without charge to any shareholder who requests them by writing to the Corporate Secretary at the address noted below. In addition, our political contributions guidelines, biographical information concerning each Director, and all our filings submitted to the SEC are also available on our website.

Shareholder Proposals

Shareholder proposals submitted pursuant to Rule 14a-8 under the Exchange Act must be submitted in writing to the Corporate Secretary at the address noted below. Exelon must receive your proposal no later than November 18, 2026, and the proposal must otherwise comply with Rule 14a-8 under the Exchange Act.

All other shareholder proposals must be submitted in writing to the Corporate Secretary at the address noted below. Exelon must receive your proposal no earlier than the close of business on October 19, 2026, and no later than the close of business on November 18, 2026. Exelon will consider only proposals meeting the applicable requirements outlined in our bylaws.

Director Recommendations and Nominations

A shareholder who wishes to recommend a candidate (including a self-nomination) to be considered by the CGC for nomination as a Director must submit the recommendation in writing to the Chair of the Corporate Governance Committee c/o the Corporate Secretary at the address noted below. The CGC will consider all recommended candidates and self-nominees when making its recommendation to the full Board of Directors to nominate a slate of Directors for election and will evaluate director candidates recommended by shareholders in the same manner as other director candidates.

A shareholder may also use one of two alternative provisions of Exelon’s bylaws to nominate a candidate for election as a director:

•Method 1: Notice of the proposed nomination must be received by Exelon no earlier than the close of business on October 19, 2026, and no later than the close of business on November 18, 2026. The notice must include the information required by Exelon’s bylaws.

•Method 2 (Proxy-Access): Subject to the requirements set forth in the bylaws, any shareholder or group of up to 20 shareholders holding both investment and voting rights with respect to at least 3% of Exelon’s outstanding common stock continuously for at least three years may nominate up to 20% of the Exelon Directors to be elected. The nominating shareholder(s) must provide notice of the proposed nomination and other required information must be received by Exelon no earlier than October 19, 2026, and no later than November 18, 2026. The notice must include the information required by Exelon’s bylaws. Under this procedure, the shareholder’s nominees will be included in the Exelon proxy statement and the form of proxy for the meeting.

Exelon will not consider any proposal or nomination that does not comply with the applicable requirements of the SEC and Exelon’s bylaws. Exelon’s bylaws are amended from time to time. Please review the bylaws posted on our website to determine if any changes to the nomination process or requirements have been made.

Contact the Corporate Secretary:Exelon Corporation, Attn: Corporate Secretary, 10 South Dearborn Street, P.O. Box 805398, Chicago, Illinois 60680-5398

Voting

Each share of common stock is entitled to one vote on each matter properly brought before the meeting. Only “shareholders of record” as of the close of business on the record date are entitled to vote at the Annual Meeting. As of the Record Date, there were 1,023,175,091 shares of common stock outstanding and entitled to vote.

Your vote is important. We encourage you to vote promptly. You may vote in the following ways:

•By Internet: If you have internet access, you may vote by internet. You will need the control number included on your Notice Regarding the Availability of Proxy Materials, proxy card, or voting instruction form, as applicable. You may vote in a secure manner atwww.proxyvote.com 24 hours a day. You will be able to confirm that the system has properly recorded your votes, and you do not need to return your proxy card or voting instruction form.

•By Telephone: If you are in the U.S. or Canada, you can vote by calling 1-800-690-6903 (toll free) and following the recorded instructions. You will need the control number included on your Notice Regarding the Availability of Proxy Materials, proxy card, or voting instruction form (VIF), as applicable. You may vote by telephone 24 hours a day. The telephone voting system has easy-to-follow instructions and allows you to confirm that the system has properly recorded your votes. If you vote by telephone, you do not need to return your proxy card or your VIF.

•By Mail: If you are a holder of record and received a full paper set of materials, you can vote by marking, dating, and signing your proxy card and returning it by mail in the postage-paid envelope provided. If you are a beneficial holder of shares held of record by a bank or broker or other street name, please complete and mail the voting instruction form provided by the holder of record.

•Online during the Annual Meeting: If you attend the virtual Annual Meeting, you may vote online during the meeting prior to the closing of the polls.

Quorum

The presence of shareholders entitled to cast at least a majority of the votes that all shareholders are entitled to cast on a particular matter shall constitute a quorum for the purposes of consideration and action on a matter. Shareholders may be present virtually or may be represented by proxy. Abstentions that are marked on the proxy form and broker non-votes are included for the purpose of determining a quorum, but shares that otherwise are not voted are not counted toward a quorum.

Voting Standards

The following table summarizes the Board’s voting recommendations for each proposal, the vote required for each proposal to pass, and the effect of abstentions on each proposal.

Majority Voting For Directors and Director Resignation Policy

We have a majority vote standard for Director elections, which requires that a nominee for Director in an uncontested election receive a majority of the votes cast at a shareholder meeting in order to be elected to the Board. The Board believes that the majority vote standard in uncontested Director elections strengthens the Director nomination process and enhances Director accountability.

We also have a Director resignation policy, which requires any nominee for election as a Director to submit an irrevocable letter of resignation as a condition to being named as such nominee, which would be tendered in the event that nominee fails to receive the affirmative vote of a majority of the votes cast in an uncontested election at a meeting of stockholders. Such resignation would be considered by the Board, and the Board would be required to either accept or reject such resignation within 90 days from the certification of the election results.

Broker Non-Votes

Broker non-votes occur when a beneficial owner of shares held in “street name” does not give instructions to the broker, bank, or other nominee holding the shares as to how to vote on matters deemed “non-routine.” Generally, if shares are held in street name, the beneficial owner of the shares is entitled to give voting instructions to the broker, bank, or other nominee holding the shares. If the beneficial owner does not provide voting instructions, the broker, bank, or other nominee can still vote the shares with respect to matters that are considered to be “routine,” but cannot vote the shares with respect to “non-routine” matters.

The following proposal is considered a routine matter: Proposal 2: Ratification of PricewaterhouseCoopers LLP as Exelon’s Independent Auditor. All other proposals are considered non-routine and broker non-votes will have no impact on the vote’s outcome.

Tabulation and Reporting of Vote Results

Preliminary voting results will be announced at the Annual Meeting. Final voting results will be tallied by the inspector of election after the Annual Meeting. Exelon will publish the final voting results in a Current Report on Form 8-K filed with the SEC within four business days following the Annual Meeting.

Abandoned Property

Escheatment is the process through which abandoned or unclaimed assets are turned over to the state in accordance with each state’s abandoned property laws. Every year, shareholder accounts can be deemed “abandoned” simply because the account owner has not initiated any action with respect to the account in several years. After a period of time, the institution holding the account is legally required to turn the assets over to the state. When Exelon’s records show that you have not voted your shares or otherwise initiated any contact (as defined by each state’s statute) within a certain number of years, we are required to send you a letter notifying you of the pending action by the state and asking you to contact us immediately so that we may record proof that you are still in control of your account. Many states further require us to use specific legal wording in the letter, and as a result many people assume that the warning letter is an attempt at fraud and ignore it.

Exelon’s transfer agent is Equiniti Trust Company, which does business as EQ Shareowner Services. If you ever receive a letter from EQ Shareowner Services or their affiliate EQ Unify, based in St. Paul, Minnesota, regarding your Exelon stock account, PLEASE TAKE IT SERIOUSLY. Please read the letter carefully to consider your options. You may call 1-800-626-8729 to verify your identity to one of EQ’s account representatives OR you may also contact Exelon’s Corporate Secretary at the address shown above to confirm its authenticity.