An anonymous director reports

CELESTICA ANNOUNCES PROPOSED SECONDARY OFFERING OF SUBORDINATE VOTING SHARES BY ONEX CORPORATION

Onex Corp., Celestica Inc.'s controlling shareholder, intends to offer for sale 12 million of Celestica's subordinate voting shares (SVS), all or substantially all of which will be issued upon conversion of a corresponding number of Celestica's multiple voting shares ("MVS") into SVS. Celestica is not selling any shares and will not receive any proceeds from the proposed offering.

RBC Capital Markets will act as the underwriter for the proposed offering.

The offering is being made in the United States only by means of a prospectus supplement to a base prospectus forming a part of an effective registration statement on Form F-3ASR (File No. 333-241513) filed with the United States Securities and Exchange Commission (the "SEC"). Prospective investors in the United States should read the base prospectus, registration statement, the prospectus supplement related to this offering and the documents incorporated by reference therein. You may obtain these documents for free on EDGAR on the SEC website at www.sec.gov. Alternatively, copies of the base prospectus and, when available, the prospectus supplement relating to this offering may also be obtained from RBC Capital Markets, LLC, Attention: Equity Capital Markets, 200 Vesey Street, New York, NY 10281, by telephone at 877-822-4089 or by email at equityprospectus@rbccm.com.

This offering is being made in Canada only by means of a prospectus supplement, together with a short form base shelf prospectus for the province of Quebec and an amended and restated short form base shelf prospectus for all other provinces and territories of Canada. Prospective investors in Canada should read the short form base shelf prospectus and the amended and restated base shelf prospectus of the Company filed with the Canadian securities regulatory authorities on May 30, 2023, the prospectus supplement thereto relating to the offering and the documents incorporated by reference therein. You may obtain these documents for free on SEDAR at www.sedar.com.

This press release does not constitute an offer for sale of securities or a solicitation for offers to buy any Celestica securities in any jurisdiction in which such offer, solicitation or sale would be unlawful. Any public offering of securities in the United States or Canada will be made solely by means of the applicable prospectus and prospectus supplement.

About Celestica

Celestica enables the world's best brands. Through our recognized customer-centric approach, we partner with leading companies in Aerospace and Defense, Communications, Enterprise, HealthTech, Industrial, and Capital Equipment to deliver solutions for their most complex challenges. As a leader in design, manufacturing, hardware platform and supply chain solutions, Celestica brings global expertise and insight at every stage of product development - from the drawing board to full-scale production and after-market services. With talented teams across North America, Europe and Asia, we imagine, develop and deliver a better future with our customers.

We seek Safe Harbor.