# EDGAR Filing Document

**Accession Number:** 0001030894
**File Stem:** 0001193125-26-274663
**Filing Date:** 2026-6
**Character Count:** 13877
**Document Hash:** 720394f4cfde7c096360a588dad8d643
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-274663.hdr.sgml**: 20260617

**ACCESSION NUMBER**: 0001193125-26-274663

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260615

**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:** 261100156

**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>2026-06-15 | **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 | 2026-06-15 |  | S<sup>(1)</sup> |  | 1420 | D | 394.58<sup>(2)</sup> | 198964<sup>(3)</sup> | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 2983 | D | 395.92<sup>(4)</sup> | 195981 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 2668 | D | 396.83<sup>(5)</sup> | 193313 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 10350 | D | 397.92<sup>(6)</sup> | 182963 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 11245 | D | 398.86<sup>(7)</sup> | 171718 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 10730 | D | 399.68<sup>(8)</sup> | 160988 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 6374 | D | 400.87<sup>(9)</sup> | 154614 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 11118 | D | 401.94<sup>(10)</sup> | 143496 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 6786 | D | 402.77<sup>(11)</sup> | 136710 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 280 | D | 403.75<sup>(12)</sup> | 136430 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 444 | D | 406.46<sup>(13)</sup> | 135986 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 160 | D | 407.48<sup>(14)</sup> | 135826 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 80 | D | $409.26 | 135746 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 80 | D | $410.22 | 135666 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 80 | D | $412.01 | 135586 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 1178 | D | 412.94<sup>(15)</sup> | 134408 | I | By Mionis 2026 GRAT Number Three |
| Common Shares | 2026-06-15 |  | S<sup>(1)</sup> |  | 80 | D | $413.68 | 134328 | I | By Mionis 2026 GRAT Number Three |
| Common Shares |  |  |  |  |  |  |  | 453697<sup>(3)(16)(17)</sup> | D |  |
| Common Shares |  |  |  |  |  |  |  | 210445<sup>(16)</sup> | I | By Mionis 2026 GRAT Number One |
| Common Shares |  |  |  |  |  |  |  | 145565<sup>(17)</sup> | 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 $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.

(3) On 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.

(4) The 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.

(5) The 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.

(6) The 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.

(7) The 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.

(8) The 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.

(9) The 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.

(10) The 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.

(11) The 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.

(12) The 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.

(13) The 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.

(14) The 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.

(15) The 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.

(16) On 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.

(17) On 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.

**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.**