X0609 4 2026-09-23 0001030894 CELESTICA INC CLS 0001195655 MIONIS ROBERT true 5140 YONGE STREET SUITE 1900 TORONTO A6 M2N 6L7 ONTARIO, CANADA true true false false Chief Executive Officer true Common Shares 2026-09-23 4 S false 1920 360.36 D 21476 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 2294 361.22 D 19182 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 2480 362.48 D 16702 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 2590 363.46 D 14112 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 3403 364.67 D 10709 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 6749 365.69 D 3960 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 3672 366.44 D 288 I By Mionis 2026 GRAT Number Two Common Shares 2026-09-23 4 S false 288 367.34 D 0 I By Mionis 2026 GRAT Number Two Common Shares 453697 D Common Shares 210445 I By Mionis 2026 GRAT Number One This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 11, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.00-$360.99, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.00-$361.99, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.00-$362.84, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.12-$364.11, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $364.12-$365.07, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.13-$366.10, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $366.13-$367.00, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $367.24-$367.45, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. /s/ Tracy Connelly McGilley, attorney-in-fact 2026-09-24