Celestica director Cascella acquires 52 shares

Six common shares were withheld for tax obligations arising from RSU vesting alongside the 52-share conversion.

Rhea-AI Filing Summary

Celestica Inc. director Robert Cascella converted 52 restricted share units into 52 common shares on September 30, 2026. His reported RSU position after the transaction was 105 units. On the same date, 6 common shares were withheld to satisfy tax withholding obligations arising from RSU vesting. Each RSU represents a contingent right to receive one common share or equivalent cash at the holder’s election.

Insider Trade Summary

52 shares exercised/converted

Exercise 3 txns

Insider CASCELLA ROBERT

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units F2, F3	52	$0.00	$0.00
Exercise	Common Shares	52	$0.00	$0.00
Tax Withholding	Common Shares F1	6	$366.47	$2K

Holdings After Transaction: Restricted Share Units — 105 contracts (Direct); Common Shares — 272 shares (Direct)

Footnotes (3)

1. F1. Shares withheld to satisfy tax withholding obligations arising out of the vesting of restricted share units ("RSUs").
2. F2. Each RSU represents a contingent right to receive one common share or an equivalent value in cash at the holder's election.
3. F3. On September 30, 2025, the reporting person was granted 157 RSUs, 1/3 of which vest annually over 3 years on the anniversary of the grant date.

Key Figures

RSUs converted: 52 RSUs Common shares acquired: 52 common shares Shares withheld: 6 common shares +2 more

5 metrics

RSUs converted 52 RSUs September 30, 2026

Common shares acquired 52 common shares September 30, 2026

Shares withheld 6 common shares Withheld for tax obligations arising from RSU vesting on September 30, 2026

RSU position after transaction 105 RSUs Reported following the September 30, 2026 transaction

RSUs granted 157 RSUs Granted September 30, 2025

Key Terms

RSU, contingent right, tax withholding obligations

3 terms

RSU financial

"Each RSU represents a contingent right to receive one common share"

Restricted stock units (RSUs) are a form of company shares given to employees as part of their compensation, usually with certain restrictions or conditions, such as remaining with the company for a set period. When these restrictions lift, employees receive actual shares that they can sell or hold. For investors, RSUs can impact a company's stock supply and reflect the company's commitment to attracting and retaining talent.

contingent right financial

"a contingent right to receive one common share or an equivalent value in cash"

tax withholding obligations financial

"Shares withheld to satisfy tax withholding obligations"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many common shares did CLS director Robert Cascella receive from RSUs?

Robert Cascella received 52 common shares through conversion of 52 RSUs on September 30, 2026; no Rule 10b5-1 plan is reported.

What was Robert Cascella’s RSU vesting schedule?

Robert Cascella was granted 157 RSUs on September 30, 2025, with one-third vesting annually over three years on the anniversary of the grant date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/01/2026 - 04:27 PM Accepted by SEC EDGAR 10/01/2026 - 04:26 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

CASCELLA ROBERT

(Last) (First) (Middle)

5140 YONGE STREET

SUITE 1900

(Street)

TORONTO M2N 6L7

(City) (State) (Zip)

ONTARIO, CANADA

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	09/30/2026		M		52	A	$0	278	D
Common Shares	09/30/2026		F		6(1)	D	$366.47	272	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Units	(2)	09/30/2026		M			52	(3)	(3)	Common Shares	52	$0	105	D

Explanation of Responses:

1. Shares withheld to satisfy tax withholding obligations arising out of the vesting of restricted share units ("RSUs").

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 September 30, 2025, the reporting person was granted 157 RSUs, 1/3 of which vest annually over 3 years on the anniversary of the grant date.

	/s/ Tracy Connelly McGilley, attorney-in-fact	10/01/2026
	** 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 4 (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 4: SEC 1474 (03-26)