一周7天、每天24小时使用电话或互联网投票！ ·使用按键电话拨打下面列出的号码。 ·访问以下网站： www.investorvote.com ·智能手机？ 扫描二维码 立即投票。 ·您可以注册接收未来证券持有人的电子通信 visiting www.investorcentre.com. 01VSCC Fold Fold Form of Proxy-将于4月27日举行的年度会议，2023. 如果您通过电话或互联网投票，请勿邮寄此代表表格。 邮寄投票可能是以公司名义持有的证券或代表另一个人投票的证券的唯一方法。 邮寄投票或互联网投票是持有人可以指定代理人以外的人作为代理人的唯一方法。 代理人表格背面指定的管理层指定人除外。您可以选择上述两种投票方式中的一种来投票此表，而不是邮寄此表。 若要通过电话或互联网投票，您需要提供下面列出的控制编号。 控制编号 1.您有权指定其他人士、公司或您选择的其他法人代表您出席 年会或其任何延期或延期并代表您行事。如阁下希望委任一名人士、公司或其他法人团体，而非本表格内列名的人士，请在所提供的空白处填上您所选择的委托持有人的姓名(见背面)。 2.如证券是以多于一名拥有人的名义登记的(例如，共同拥有权、受托人、遗嘱执行人等)，则所有登记人士均应签署本委托书。 如果您代表公司、其他法人实体或其他个人投票，您必须在此委托书上签名，并注明签名能力，并且您可能需要提供 证明您有权签署此委托书的文件。 3.此委托书的签名方式应与委托书上的姓名(S)(S)完全相同。 4.如果此委托书没有注明日期，它将被视为具有管理层邮寄给您的日期。 5.此委托书所代表的证券，在正确执行后，将按照您的指示投赞成票、反对票或弃权票，但是，如果您没有就任何事项指示您的投票，并且您没有指定除在此打印姓名的人以外的其他人或公司作为您的委托持有人，则将投票表决此委托书：选举管理层提名的人进入Celestica Inc.的董事会；任命毕马威有限责任公司为Celestica Inc.的审计师；授权Celestica Inc.董事会确定审计师的薪酬；本委托书对股东周年大会或其任何延会或延期可能适当提出的会议通知或其他事项的修改或变更具有酌情决定权。 7.本委托书应与股东周年大会通知及管理层信息通告一并阅读。提交的委托书必须于上午9：30前收到。美国东部夏令时2023年4月25日，如果年会延期或延期，则在年会延期或延期前至少48小时，星期六、星期日和法定节假日除外。 填写委托书备注 ·填写委托书，签名并注明日期。 ·将此委托书放在提供的信封中寄回。 通过邮寄投票使用电话投票使用互联网接收文件电子 多伦多大学大道100 8楼，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 持有者账号 CPUQC01.E.INT/000001/i1234 123456789012345 1-866-732-Vote(8683)免费电话

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