CONSOLIDATED EDISON INC

What Are The Proxy Materials?

The Proxy Materials include the following:

•The Proxy Statement.

•The Annual Report to Stockholders of the Company, which includes the consolidated financial statements and accompanying notes for the year ended December 31, 2025, and other information relating to the Company’s financial condition and results of operations.

If you received the Proxy Materials by mail, they also include a proxy card, and a voter instruction form for use at the 2026 Annual Meeting.

Why Am I Receiving the Proxy Materials?

The Proxy Materials are being provided to all stockholders (as of the record date) of the Company on or about April 8, 2026 in connection with the solicitation of proxies by the Board of Directors of the Company for use at the Annual Meeting and any adjournments or postponements of the Annual Meeting. As a stockholder, you are invited to the Annual Meeting and to vote on the items of business described in this Proxy Statement. The Proxy Materials include information that we are required to provide to you under the rules of the SEC. We are providing the Proxy Materials to our stockholders by mail, email, or in accordance with the SEC’s “Notice and Access” rule.

Why Did I Receive the Proxy Materials in the Mail?

We are providing paper copies of the Proxy Materials to those stockholders who have previously requested to receive paper copies. You may also access the Proxy Materials and vote online at the internet address provided on the proxy card or the voter instruction form and the virtual meeting website: www.virtualshareholdermeeting.com/ED2026. If you do not want to receive paper copies of Proxy Materials on an ongoing basis, please sign up for electronic delivery by following the instructions on your proxy card or voter instruction form.

Why Did I Receive e-Mail Delivery of the Proxy Materials?

We are providing email delivery of the Proxy Materials to those stockholders who have previously elected electronic delivery and to stock plan participants with email addresses on file. Those stockholders should have received an email containing a link to the website where those materials are available and a link to the proxy voting website.

Why Did I Receive a Notice of Internet Availability of Proxy Materials?

To reduce the environmental impact of our Annual Meeting, we are providing the Proxy Materials over the internet. As a result, we are sending many of our stockholders a Notice of Internet Availability of Proxy Materials (the “Notice of Internet Availability”) instead of a paper copy of the Proxy Materials. All stockholders receiving the Notice of Internet Availability may access the Proxy Materials over the internet and request a paper copy of the Proxy Materials by mail. Instructions on how to access the Proxy Materials over the internet, to vote online, and to request a paper copy may be found in the Notice of Internet Availability. In addition, the Notice of Internet Availability contains instructions on how you may request delivery of proxy materials in printed form by mail or electronically on an ongoing basis.

Can I Request a Paper Copy of the Proxy Statement and Annual Report?

The Company’s Proxy Statement and Annual Report are available on our website atwww.conedison.com/en/investors/shareholder-services. A copy of these materials is also available without charge upon written request to the Company’s Vice President and Corporate Secretary at the Company’s principal executive office at 4 Irving Place, New York, New York 10003.

Consolidated Edison, Inc. Proxy Statement 95

I Share an Address with Another Stockholder, and We Received Only One Copy of the Proxy Materials. How May I Obtain an Additional Copy?

We have adopted a procedure approved by the SEC called “householding.” Under this procedure, registered holders of Company Common Stock who have the same address and last name and who receive either a Notice of Internet Availability or a paper copy of the Proxy Materials in the mail will receive only one copy of the Proxy Materials, or a single envelope containing the Notice of Internet Availability, for all stockholders at that address. This consolidated method of delivery will continue unless we are notified from a stockholder at that address that individual copies are preferred. Householding allows us to realize significant cost savings and reduces the amount of duplicate information stockholders receive.

If you are a registered holder of Company Common Stock and wish to discontinue householding, please notify Computershare, the Company’s Transfer Agent and Registrar, by calling 1-800-522-5522.

If you are a beneficial holder of Company Common Stock who holds Company Common Stock through an intermediary, such as a broker, bank, or other financial institution, and wish to discontinue householding, please submit a request to Broadridge Householding Department by telephone at 1-866-540-7095 or by mail at 51 Mercedes Way, Edgewood, NY 11717.

Who Pays the Cost of Soliciting Proxies for the Annual Meeting?

The Company is bearing all costs of solicitation and is not using services provided by, or paying fees to, a third-party company in connection with the solicitation of proxies other than as discussed herein as to Broadridge Financial Solutions, Inc. for proxy solicitation, administration, virtual meeting and Inspector of Election services.