一週7天、每天24小時使用電話或互聯網投票！ ·使用按鍵電話撥打下面列出的號碼。 ·訪問以下網站： www.investorvote.com ·智能手機？ 掃描二維碼 立即投票。 ·您可以註冊接收未來證券持有人的電子通信 visiting www.investorcentre.com. 01VSCC Fold Fold Form of Proxy-將於4月27日舉行的年度會議，2023. 如果您通過電話或互聯網投票，請勿郵寄此代表表格。 郵寄投票可能是以公司名義持有的證券或代表另一個人投票的證券的唯一方法。 郵寄投票或互聯網投票是持有人可以指定代理人以外的人作為代理人的唯一方法。 代理人表格背面指定的管理層指定人除外。您可以選擇上述兩種投票方式中的一種來投票此表，而不是郵寄此表。 若要通過電話或互聯網投票，您需要提供下面列出的控制編號。 控制編號 1.您有權指定其他人士、公司或您選擇的其他法人代表您出席 年會或其任何延期或延期並代表您行事。如閣下希望委任一名人士、公司或其他法人團體，而非本表格內列名的人士，請在所提供的空白處填上您所選擇的委託持有人的姓名(見背面)。 2.如證券是以多於一名擁有人的名義登記的(例如，共同擁有權、受託人、遺囑執行人等)，則所有登記人士均應簽署本委託書。 如果您代表公司、其他法人實體或其他個人投票，您必須在此委託書上簽名，並註明簽名能力，並且您可能需要提供 證明您有權簽署此委託書的文件。 3.此委託書的簽名方式應與委託書上的姓名(S)(S)完全相同。 4.如果此委託書沒有註明日期，它將被視為具有管理層郵寄給您的日期。 5.此委託書所代表的證券，在正確執行後，將按照您的指示投贊成票、反對票或棄權票，但是，如果您沒有就任何事項指示您的投票，並且您沒有指定除在此打印姓名的人以外的其他人或公司作為您的委託持有人，則將投票表決此委託書：選舉管理層提名的人進入Celestica Inc.的董事會；任命畢馬威有限責任公司為Celestica Inc.的審計師；授權Celestica Inc.董事會確定審計師的薪酬；本委託書對股東周年大會或其任何延會或延期可能適當提出的會議通知或其他事項的修改或變更具有酌情決定權。 7.本委託書應與股東周年大會通知及管理層信息通告一併閲讀。提交的委託書必須於上午9：30前收到。美國東部夏令時2023年4月25日，如果年會延期或延期，則在年會延期或延期前至少48小時，星期六、星期日和法定節假日除外。 填寫委託書備註 ·填寫委託書，簽名並註明日期。 ·將此委託書放在提供的信封中寄回。 通過郵寄投票使用電話投票使用互聯網接收文件電子 多倫多大學大道100 8樓，安大略省M5J 2Y1 www.ComputerShar.com Mr SAM Sample Samples Street SAMPLETOWN SS X9X 9X9 Security Class 多投票股 C1234567890 XXX 持有者賬號 CPUQC01.E.INT/000001/i1234 123456789012345 1-866-732-Vote(8683)免費電話

348595 Fold Fold . AR1 If you are not mailing back your form of proxy, you may register online to receive the above financial report(s) by mail at www.computershare.com/mailinglist. Interim Financial Statements – Mark this box if you would like to receive Interim Financial Statements and accompanying Management’s Discussion and Analysis by mail. Annual Financial Statements – Mark this box if you would like to receive the Annual Financial Statements and accompanying Management’s Discussion and Analysis by mail. 01VSDA Authorized Signature(s) – This section must be completed for your instructions to be executed. I/We authorize you to act in accordance with my/our instructions set out above. I/We hereby revoke any form of proxy previously given with respect to the Annual Meeting. If no voting instructions are indicated above, this form of proxy will be voted as recommended by Management. DD . / MM / YY Signature(s) Date Appointment of Proxyholder Instead of either of the foregoing, print the name of the person you are appointing if this person is someone other than the Management Nominees listed herein. I/We, being holder(s) of Multiple Voting Shares of Celestica Inc. hereby appoint: Michael M. Wilson or, failing him, Robert A. Mionis, or their designees (Management Nominees) OR as my/our proxyholder with full power of substitution and to attend, act and to vote in accordance with the following direction (or if no directions have been given, as the proxyholder sees fit) and to vote at the discretion of the proxyholder with respect to amendments or variations to matters identified in the Notice of Meeting or other matters that may properly come before the Annual Meeting of Shareholders of Celestica Inc. to be held virtually at https://meetnow.global/MR6KD4X on April 27, 2023 at 9:30 a.m. EDT and at any adjournments or postponements thereof. VOTING RECOMMENDATIONS OF MANAGEMENT ARE INDICATED BY HIGHLIGHTED TEXT OVER THE BOXES. 1. Election of Directors 4. Advisory resolution on Celestica Inc.’s approach to executive compensation For Against For Withhold For Withhold For Withhold 2. Appointment of auditor Appointment of KPMG LLP as auditor of Celestica Inc. For Withhold 3. Authority to fix the remuneration of the auditor Authorization of the Board of Directors of Celestica Inc. to fix the remuneration of the auditor. For Withhold 01. Robert A. Cascella 04. Daniel P. DiMaggio 07. Robert A. Mionis 02. Deepak Chopra 05. Jill Kale 08. Luis A. Müller 09. Tawfiq Popatia 03. Françoise Colpron 06. Laurette T. Koellner This form of proxy is solicited by and on behalf of Management. 10. Michael M. Wilson MR SAM SAMPLE 123 C1234567890 XXX CLSQ 999999999999