SEC FORM 3

SEC FORM 3SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Dorwart Steven Gregg

(Last)

(First)

(Middle)

5140 YONGE STREET

SUITE 1900

(Street)

TORONTO

M2N 6L7

(City)

(State)

(Zip)

ONTARIO, CANADA

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
07/06/2026

3. Issuer Name and Ticker or Trading Symbol
CELESTICA INC [ CLS ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Restricted Share Units	⁽¹⁾	⁽¹⁾	Common Shares	2,215	⁽²⁾	D
Restricted Share Units	⁽³⁾	⁽³⁾	Common Shares	1,765	⁽²⁾	D
Restricted Share Units	⁽⁴⁾	⁽⁴⁾	Common Shares	7,649	⁽²⁾	D
Restricted Share Units	⁽⁵⁾	⁽⁵⁾	Common Shares	1,684	⁽²⁾	D

Explanation of Responses:

1. On February 2, 2024, the reporting person was granted 6,645 restricted share units ("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.

2. Each RSU represents a contingent right to receive one common share or an equivalent value in cash at the holder's election.

3. On February 4, 2025, the reporting person was granted 2,648 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.

4. On June 13, 2025, the reporting person was granted 7,649 RSUs, which vest on June 13, 2028.

5. On February 3, 2026, the reporting person was granted 1,684 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.

Remarks:

Exhibit 24.1 - Power of Attorney

	/s/ Tracy Connely McGilley, attorney-in-fact	07/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)