SS&C Technologies Holdings Inc

You may vote either electronically at the 2025 annual meeting, over the internet by following the instructions provided in the Notice of Internet Availability or by proxy. To vote by proxy, you must:

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Complete all of the required information on the proxy card.

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Date and sign the proxy card.

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Return the proxy card in the enclosed postage-paid envelope. We must receive your proxy card before the 2025 annual meeting for your proxy to be valid and for your vote to count.

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If you are not the stockholder of record and hold shares through a bank, broker or other nominee, such agent may have special voting instructions that you should follow. You should contact your bank, broker or other nominee to obtain instructions for voting your shares.

Whether or not you expect to attend the 2025 annual meeting virtually, you are requested to complete, sign, date and return the enclosed form of proxy (or, if you are a stockholder accessing these proxy materials via the internet, you are requested to vote by following the instructions for voting provided in the Notice). The shares represented by your proxy will be voted in accordance with your instructions. If you attend the 2025 annual meeting, you may vote by ballot.

Your properly completed proxy card will appoint William C. Stone, Brian N. Schell and Jason White as proxy holders, or your representatives, to vote your shares in the manner directed therein by you. Mr. Stone is our Chairman and Chief Executive Officer, Mr. Schell is our Executive Vice President and Chief Financial Officer and Mr. White is our Senior Vice President, General Counsel and Secretary. Your proxy permits you to direct the proxy holders to:

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vote “FOR,” “AGAINST” or “ABSTAIN” from the nominees for director;

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vote “FOR,” “AGAINST” or “ABSTAIN” from the non-binding resolution to approve the compensation of our named executive officers;

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vote “FOR,” “AGAINST” or “ABSTAIN” from the proposal to ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for fiscal 2025; and

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vote “FOR,” “AGAINST” or “ABSTAIN” from the approval of the second amendment and restatement of the SS&C Technologies Holdings, Inc. 2023 Stock Incentive Plan.

All shares entitled to vote and represented by properly completed proxies received prior to the 2025 annual meeting and not revoked will be voted at the 2025 annual meeting in accordance with your instructions. If you do not indicate how your shares are to be voted on a matter, the shares represented by your properly executed proxy will be voted “FOR” the election of the nominee for director, “FOR” the non-binding resolution to approve the compensation of our named executive officers, “FOR” the proposal to ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for fiscal 2025, and “FOR” the approval of the second amendment and restatement of the SS&C Technologies Holdings, Inc. 2023 Stock Incentive Plan, and in the discretion of the persons named as proxies in the manner they believe to be in the Company’s best interests as to other matters that may properly come before the 2025 annual meeting.

General Information About the 2024 Annual Meeting