X0508 4 2025-10-30 0001030894 CELESTICA INC CLS 0001182054 KOELLNER LAURETTE T 5140 YONGE STREET SUITE 1900 TORONTO, A6 A6 M2N 6L7 ONTARIO, CANADA true false false false false Common Shares 2025-10-30 4 P false 700 339.68 A 700 D Common Shares 2025-10-30 4 P false 600 340.55 A 1300 D Common Shares 2025-10-30 4 P false 3227 341.96 A 4527 D Common Shares 2025-10-30 4 P false 1473 342.44 A 6000 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $339.27-$340.24, 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 purchased in multiple transactions at prices ranging from $340.34-$340.72, 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 purchased in multiple transactions at prices ranging from $341.35-$342.34, 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 purchased in multiple transactions at prices ranging from $342.35-$342.64, 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/ Samantha Graff, attorney-in-fact 2025-10-30