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Proxy Statement Pursuant to Section 14(a) of 

the Securities Exchange Act of 1934 (Amendment     )


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¨Preliminary Proxy Statement


¨Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))


¨Definitive Proxy Statement


xDefinitive Additional Materials


¨Soliciting Material under §240.14a-12




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Step 1: Go to www.envisionreports.com/REPL. Step 2: Click on Cast Your Vote or Request Materials. Step 3: Follow the instructions on the screen to log in. www.envisionreports.com/REPL Online Go to www.envisionreports.com/REPL or scan the QR code — login details are located in the shaded bar below. 2023 Annual Meeting of Replimune Group, Inc. Notice 03UQXB + + Important Notice Regarding the Availability of Proxy Materials for the 2023 Annual Meeting of Stockholders of Replimune Group, Inc. to be Held on September 6, 2023 Under Securities and Exchange Commission rules, you are receiving this notice that the proxy materials for the annual meeting of stockholders of Replimune Group, Inc. are available on the Internet. Follow the instructions below to view the materials and vote online or request a copy. The items to be voted on and location of the annual meeting are on the reverse side. Your vote is important! This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. Replimune’s 2023 Proxy Statement and Annual Report on Form 10-K for the fiscal year ended March 31, 2023 are available at: Obtaining a Copy of the Proxy Materials – If you want to receive a copy of the proxy materials, you must request one. There is no charge to you for requesting a copy. Please make your request as instructed on the reverse side on or before August 25, 2023 to facilitate timely delivery. 2NOT Easy Online Access — View your proxy materials and vote. When you go online, you can also help the environment by consenting to receive electronic delivery of future materials. Step 4: Make your selections as instructed on each screen for your delivery preferences. Step 5: Vote your shares.


Here’s how to order a copy of the proxy materials and select delivery preferences: Current and future delivery requests can be submitted using the options below. If you request an email copy, you will receive an email with a link to the current meeting materials. PLEASE NOTE: You must use the number in the shaded bar on the reverse side when requesting a copy of the proxy materials. — Internet – Go to www.envisionreports.com/REPL. Click Cast Your Vote or Request Materials. — Phone – Call us free of charge at 1-866-641-4276. — Email – Send an email to investorvote@computershare.com with “Proxy Materials Replimune Group, Inc.” in the subject line. Include your full name and address, plus the number located in the shaded bar on the reverse side, and state that you want a paper copy of the meeting materials. To facilitate timely delivery, all requests for a paper copy of proxy materials must be received by August 25, 2023. The 2023 Annual Meeting of Stockholders of Replimune Group, Inc. will be held on Wednesday, September 6, 2023 at 3:00 P.M. Eastern time, virtually via the internet at www.meetnow.global/M557R6D. To access the virtual meeting, you must have the information that is printed in the shaded bar located on the reverse side of this form. Proposals to be voted on at the meeting are listed below along with the Board of Directors’ recommendations. The Board of Directors recommends a vote FOR all the nominees listed and FOR Proposal 2: 1. Election of Directors: 01 - Paolo Pucci 02 - Veleka Peeples-Dyer 2. To ratify the selection of PricewaterhouseCoopers LLP as the independent registered public accounting firm for Replimune Group, Inc. for the fiscal year ending March 31, 2024. PLEASE NOTE – YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must go online or request a paper copy of the proxy materials to receive a proxy card. 2023 Annual Meeting of Stockholders of Replimune Group, Inc.