ROBERT MIONIS - 01 Dec 2025 Form 4 Insider Report for CELESTICA INC (CLS)

Role: Chief Executive Officer, Director
Signature: /s/ Samantha Graff, attorney-in-fact
Issuer symbol: CLS
Transactions as of: 01 Dec 2025
Net transactions value: -$11,751,269
Form type: 4
Filing time: 02 Dec 2025, 16:15:04 UTC
Previous filing: 25 Apr 2025
Next filing: 30 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MIONIS ROBERT	Chief Executive Officer, Director	5140 YONGE STREET, SUITE 1900, TORONTO, ONTARIO, CANADA	/s/ Samantha Graff, attorney-in-fact	02 Dec 2025	0001195655

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CLS	Common Shares	Options Exercise	$0	+86,709	+19%	$0.000000	543,126	01 Dec 2025	Direct
transaction	CLS	Common Shares	Tax liability	$11,751,269	-34,120	-6.3%	$344.41	509,006	01 Dec 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CLS	Restricted Share Units	Options Exercise	$0	-86,709	-100%	$0.000000	0	01 Dec 2025	Common Shares	86,709		Direct	F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Shares withheld to satisfy tax withholding obligations arising out of the vesting of restricted share units ("RSUs").
F2	Each RSU represents a contingent right to receive one common share or an equivalent value in cash at the holder's election.
F3	On January 31, 2023, the reporting person was granted 260,126 RSUs, which vest ratably over a three-year period on each of the first and second anniversaries of the grant date and on December 1 following the second anniversary of the grant date.