SEC Form 4 · accession 0001193125-26-274663

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

Jun 15, 2026

Accepted (ET)

Jun 17, 2026 · 8:53 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,F3	Jun 15, 2026	S	1,420	$394.58	D	198,964	I	By Mionis 2026 GRAT Number Three
Common Shares^F4	Jun 15, 2026	S	2,983	$395.92	D	195,981	I	By Mionis 2026 GRAT Number Three
Common Shares^F5	Jun 15, 2026	S	2,668	$396.83	D	193,313	I	By Mionis 2026 GRAT Number Three
Common Shares^F6	Jun 15, 2026	S	10,350	$397.92	D	182,963	I	By Mionis 2026 GRAT Number Three
Common Shares^F7	Jun 15, 2026	S	11,245	$398.86	D	171,718	I	By Mionis 2026 GRAT Number Three
Common Shares^F8	Jun 15, 2026	S	10,730	$399.68	D	160,988	I	By Mionis 2026 GRAT Number Three
Common Shares^F9	Jun 15, 2026	S	6,374	$400.87	D	154,614	I	By Mionis 2026 GRAT Number Three
Common Shares^F10	Jun 15, 2026	S	11,118	$401.94	D	143,496	I	By Mionis 2026 GRAT Number Three
Common Shares^F11	Jun 15, 2026	S	6,786	$402.77	D	136,710	I	By Mionis 2026 GRAT Number Three
Common Shares^F12	Jun 15, 2026	S	280	$403.75	D	136,430	I	By Mionis 2026 GRAT Number Three
Common Shares^F13	Jun 15, 2026	S	444	$406.46	D	135,986	I	By Mionis 2026 GRAT Number Three
Common Shares^F14	Jun 15, 2026	S	160	$407.48	D	135,826	I	By Mionis 2026 GRAT Number Three
Common Shares	Jun 15, 2026	S	80	$409.26	D	135,746	I	By Mionis 2026 GRAT Number Three
Common Shares	Jun 15, 2026	S	80	$410.22	D	135,666	I	By Mionis 2026 GRAT Number Three
Common Shares	Jun 15, 2026	S	80	$412.01	D	135,586	I	By Mionis 2026 GRAT Number Three
Common Shares^F15	Jun 15, 2026	S	1,178	$412.94	D	134,408	I	By Mionis 2026 GRAT Number Three
Common Shares	Jun 15, 2026	S	80	$413.68	D	134,328	I	By Mionis 2026 GRAT Number Three
Common Shares^F3,F16,F17	holding	—	—		—	453,697	D
Common Shares^F16	holding	—	—		—	210,445	I	By Mionis 2026 GRAT Number One
Common Shares^F17	holding	—	—		—	145,565	I	By Mionis 2026 GRAT Number Two

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 $401.38-$402.29, 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 $402.31-$403.30, 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 $403.45-$404.00, 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.
F13The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $406.345-$406.755, 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 $407.44-$407.51, 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 $412.33-$413.26, 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.
F16On February 6, 2026, the Reporting Person contributed 210,445 shares of the Issuer's common shares to Mionis 2026 GRAT Number One, which contribution was exempt from Section 16 pursuant to Rule 16a-13 under the Exchange Act.
F17On February 19, 2026, the Reporting Person contributed 145,565 shares of the Issuer's common shares to Mionis 2026 GRAT Number Two, which contribution was exempt from Section 16 pursuant to Rule 16a-13 under the Exchange Act.
F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $394.31-$395.30, 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.
F3On March 10, 2026, the Reporting Person contributed 200,384 shares of the Issuer's common shares to Mionis 2026 GRAT Number Three, which contribution was exempt from Section 16 pursuant to Rule 16a-13 under the Exchange Act.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $395.32-$396.25, 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 $396.40-$397.29, 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 $397.46-$398.30, 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 $398.31-$399.30, 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 $399.31-$400.215, 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 $400.34-$401.30, 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.