SEC Form 4 · accession 0001193125-26-338762

CELESTICA INC · CLS

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Robert Mionis

Officer — Chief Executive Officer · Director

Period of report

Aug 4, 2026

Accepted (ET)

Aug 6, 2026 · 8:19 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001030894

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Shares^F2	Aug 4, 2026	S	9,564	$360.28	D	41,277	I	By Mionis 2026 GRAT Number Three
Common Shares^F3	Aug 4, 2026	S	1,331	$361.52	D	39,946	I	By Mionis 2026 GRAT Number Three
Common Shares^F4	Aug 4, 2026	S	1,895	$362.35	D	38,051	I	By Mionis 2026 GRAT Number Three
Common Shares^F5	Aug 4, 2026	S	5,887	$363.57	D	32,164	I	By Mionis 2026 GRAT Number Three
Common Shares^F6	Aug 4, 2026	S	1,940	$364.58	D	30,224	I	By Mionis 2026 GRAT Number Three
Common Shares^F7	Aug 4, 2026	S	1,939	$365.53	D	28,285	I	By Mionis 2026 GRAT Number Three
Common Shares^F8	Aug 4, 2026	S	5,254	$366.72	D	23,031	I	By Mionis 2026 GRAT Number Three
Common Shares^F9	Aug 4, 2026	S	5,629	$367.64	D	17,402	I	By Mionis 2026 GRAT Number Three
Common Shares^F10	Aug 4, 2026	S	5,841	$368.60	D	11,561	I	By Mionis 2026 GRAT Number Three
Common Shares^F11	Aug 4, 2026	S	3,522	$369.31	D	8,039	I	By Mionis 2026 GRAT Number Three
Common Shares^F12	Aug 4, 2026	S	447	$370.37	D	7,592	I	By Mionis 2026 GRAT Number Three
Common Shares^F13	Aug 4, 2026	S	2,401	$371.67	D	5,191	I	By Mionis 2026 GRAT Number Three
Common Shares^F14	Aug 4, 2026	S	3,986	$372.42	D	1,205	I	By Mionis 2026 GRAT Number Three
Common Shares^F15	Aug 4, 2026	S	1,205	$373.34	D	0	I	By Mionis 2026 GRAT Number Three
Common Shares^F16	Aug 4, 2026	S	1,717	$360.43	D	143,848	I	By Mionis 2026 GRAT Number Two
Common Shares^F17	Aug 4, 2026	S	1,051	$361.66	D	142,797	I	By Mionis 2026 GRAT Number Two
Common Shares^F18	Aug 4, 2026	S	5,785	$371.63	D	137,012	I	By Mionis 2026 GRAT Number Two
Common Shares^F19	Aug 4, 2026	S	22,375	$372.48	D	114,637	I	By Mionis 2026 GRAT Number Two
Common Shares^F20	Aug 4, 2026	S	13,131	$373.43	D	101,506	I	By Mionis 2026 GRAT Number Two
Common Shares^F21	Aug 4, 2026	S	3,553	$374.16	D	97,953	I	By Mionis 2026 GRAT Number Two
Common Shares	holding	—	—		—	453,697	D
Common Shares	holding	—	—		—	210,445	I	By Mionis 2026 GRAT Number One

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 11, 2026.
F10The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $368.00-$368.99, 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.
F11The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $369.00-$369.81, 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.
F12The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $370.10-$370.77, 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.
F13The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $371.13-$371.97, 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.
F14The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.06-372.95, 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.
F15The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $373.07-$373.88, 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.
F16The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.00-$360.65, 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.
F17The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.18-$361.92, 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.
F18The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $371.04-$371.99, 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.
F19The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.00-$372.99, 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.
F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.00-$360.96, 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.
F20The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $373.00-$373.98, 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.
F21The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $374.00-$374.43, 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.
F3The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.03-$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.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.00-$362.77, 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.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.03-$363.99, 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.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $364.11-$364.99, 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.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.24-$365.87, 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.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $366.01-$366.99, 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.
F9The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $367.00-$367.99, 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.