Company: RPTX
Filing Date: 2025-12-03
Form Type: PREM14A
Source: 0001193125-25-306948
Chunk: 33

Company: Repare Therapeutics Inc.
Filing Date: 2025-12-03
Form: PREM14A
Chunk 33
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 participate or vote at the Special Meeting as their proxy and vote their shares MUST submit their proxy card appointing such third-party proxyholder AND register the third-party proxyholder, as described below. Registering your proxyholder is an additional step to be completed AFTER you have submitted your proxy. Failure to register the proxyholder will result in the proxyholder not receiving access to attend, participate or vote at the Special Meeting.

| • |     | Step 1: To appoint a third-party proxyholder, insert such person’s name and email in the blank space                                                                                                                                              
 provided in the proxy card and follow the instructions for submitting such proxy card by mail. This must be completed prior to registering such proxyholder, which is an additional step to be completed once you have submitted your proxy card. |

| • |     | Step 2: To register a duly appointed third-party proxyholder, Shareholders MUST provide the proxyholder                                                                    
 contact information requested by BetaNXT, Inc. in order to be provided with the information and credentials to access, attend, participate or vote at the Special Meeting. |

Proxies appointing a third-party proxyholder must be deposited in accordance with the instructions set forth on the proxy card by no later than 10:00 a.m. (Montreal time) on January 14, 2025, or if the Special Meeting is postponed or adjourned, by no later than 48 hours prior to the time of such postponed or adjourned meeting (excluding Saturdays, Sundays and holidays). We reserve the right to accept late proxies and to waive the proxy cut-off, with or without notice. Beneficial Owner: Common Shares Registered in the Name of Broker or Ban k If you are a beneficial owner of Common shares registered in the name of your broker, bank or other agent, you should have received a Notice containing voting instructions from that organization rather than from us. To vote prior to the Special Meeting, simply follow the voting instructions in the Notice to ensure that your vote is counted. To vote online during the Special Meeting, you must obtain a valid proxy from your broker, bank or other agent. Follow the instructions from your broker, bank or other agent included with these proxy materials, or contact that organization to request a proxy form. You may access and vote at the Special Meetingby logging in with your Control Number on your voting instruction form at www.proxydocs.com/RPTX. However, since you are not the Shareholder of record, you may be instructed to obtain a legal proxy from your broker, bank