# EDGAR Filing Document

**Accession Number:** 0001195655
**File Stem:** 0001193125-26-274665
**Filing Date:** 2026-6
**Character Count:** 13265
**Document Hash:** a581d26188ca10fb5b53740a1212e25e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-274665.hdr.sgml**: 20260617

**ACCESSION NUMBER**: 0001193125-26-274665

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260616

**FILED AS OF DATE**: 20260617

**DATE AS OF CHANGE**: 20260617

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** MIONIS ROBERT
- **CENTRAL INDEX KEY:** 0001195655

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-14832
- **FILM NUMBER:** 261100158

**MAIL ADDRESS:**
- **STREET 1:** 5140 YONGE STREET, SUITE 1900
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M2N 6L7
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CELESTICA INC
- **CENTRAL INDEX KEY:** 0001030894
- **STANDARD INDUSTRIAL CLASSIFICATION:** PRINTED CIRCUIT BOARDS [3672]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 980185558
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 5140 YONGE STREET, SUITE 1900
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M2N 6L7
- **BUSINESS PHONE:** 416-448-5800

**MAIL ADDRESS:**
- **STREET 1:** 5140 YONGE STREET, SUITE 1900
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M2N 6L7

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

[x] 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**<sup>*</sup><br>MIONIS ROBERT<br><sub>(Last) (First) (Middle)</sub><br>5140 YONGE STREET<br>SUITE 1900<br><sub>(Street)</sub><br>TORONTO, ONTARIO, CANADA M2N 6L7<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-16 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Executive Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>CELESTICA INC [ CLS ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 4779 | D | 382.21<sup>(2)</sup> | 129549 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 5887 | D | 383.14<sup>(3)</sup> | 123662 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 5299 | D | 384.05<sup>(4)</sup> | 118363 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 6841 | D | 385.09<sup>(5)</sup> | 111522 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 5826 | D | 386.18<sup>(6)</sup> | 105696 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 7017 | D | 387.05<sup>(7)</sup> | 98679 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 4307 | D | 388.09<sup>(8)</sup> | 94372 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 3155 | D | 389.06<sup>(9)</sup> | 91217 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 3872 | D | 390.13<sup>(10)</sup> | 87345 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 1793 | D | 391.17<sup>(11)</sup> | 85552 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 2418 | D | 392.24<sup>(12)</sup> | 83134 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 1595 | D | 393.06<sup>(13)</sup> | 81539 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 868 | D | 394.05<sup>(14)</sup> | 80671 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 1511 | D | 394.95<sup>(15)</sup> | 79160 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-16 |  | S<sup>(1)</sup> |  | 600 | D | $395.86 | 78560 | I | By Mionis 2026 GRAT Number Three |
| Common Shares |  |  |  |  |  |  |  | 453697 | D |  |
| Common Shares |  |  |  |  |  |  |  | 210445 | I | By Mionis 2026 GRAT Number One |
| Common Shares |  |  |  |  |  |  |  | 145565 | I | By Mionis 2026 GRAT Number Two |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 11, 2026.

(2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $381.61-$382.60, 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.

(3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $382.62-$383.59 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.

(4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $383.61-$384.60, 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.

(5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $384.64-$385.59, 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.

(6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $385.61-$386.60, 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.

(7) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $386.61-$387.58, 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.

(8) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $387.61-$388.56, 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.

(9) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $388.62-$389.59, 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.

(10) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $389.63-$390.545, 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.

(11) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $390.62-$391.585, 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.

(12) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $391.62-$392.56, 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.

(13) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $392.69-$393.57, 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.

(14) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $393.66-$394.5675 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.

(15) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $394.65-$395.50 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.

**Signature:** /s/ Tracy Connelly McGilley, attorney-in-fact  
**Date:** 2026-06-17

### Remarks:

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.**