Robert Mionis - 05 Aug 2026 Form 4 Insider Report for CELESTICA INC (CLS)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: CLS
Reported as of: 05 Aug 2026
Net transaction value: -$18,811,133
SEC form: 4
Accepted by SEC: 06 Aug 2026, 20:20:23 UTC
Prior SEC filing: 06 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Tracy Connelly McGilley, attorney-in-fact

Key filing fact

Robert Mionis filed Form 4 for CELESTICA INC (CLS) on 06 Aug 2026.

Key facts

This page summarizes Robert Mionis's Form 4 filing for CELESTICA INC (CLS).
18 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 06 Aug 2026, 20:20.

Change

Previous filing in this sequence was filed on 06 Aug 2026.
Current net transaction value: -$18,811,133.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001195655 Primary reporting owner

MIONIS ROBERT

Relationship: Chief Executive Officer, Director
Address: 5140 YONGE STREET, SUITE 1900, TORONTO, ONTARIO, CANADA
Signature: /s/ Tracy Connelly McGilley, attorney-in-fact
Signature date: 06 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CLS transaction

Common Shares

Sale

Transaction value: $395,184
Shares: -1,092
Change %: -1.1%
Price: $361.89
Shares after: 96,861
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F2

CLS transaction

Common Shares

Sale

Transaction value: $2,141,303
Shares: -5,909
Change %: -6.1%
Price: $362.38
Shares after: 90,952
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F3

CLS transaction

Common Shares

Sale

Transaction value: $1,243,012
Shares: -3,419
Change %: -3.8%
Price: $363.56
Shares after: 87,533
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F4

CLS transaction

Common Shares

Sale

Transaction value: $1,275,064
Shares: -3,501
Change %: -4%
Price: $364.20
Shares after: 84,032
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F5

CLS transaction

Common Shares

Sale

Transaction value: $387,976
Shares: -1,061
Change %: -1.3%
Price: $365.67
Shares after: 82,971
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F6

CLS transaction

Common Shares

Sale

Transaction value: $18,332
Shares: -50
Change %: -0.06%
Price: $366.65
Shares after: 82,921
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F7

CLS transaction

Common Shares

Sale

Transaction value: $393,503
Shares: -1,070
Change %: -1.3%
Price: $367.76
Shares after: 81,851
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F8

CLS transaction

Common Shares

Sale

Transaction value: $1,606,228
Shares: -4,358
Change %: -5.3%
Price: $368.57
Shares after: 77,493
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F9

CLS transaction

Common Shares

Sale

Transaction value: $4,956,071
Shares: -13,414
Change %: -17%
Price: $369.47
Shares after: 64,079
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F10

CLS transaction

Common Shares

Sale

Transaction value: $2,472,383
Shares: -6,674
Change %: -10%
Price: $370.45
Shares after: 57,405
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F11

CLS transaction

Common Shares

Sale

Transaction value: $1,811,190
Shares: -4,876
Change %: -8.5%
Price: $371.45
Shares after: 52,529
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F12

CLS transaction

Common Shares

Sale

Transaction value: $399,607
Shares: -1,073
Change %: -2%
Price: $372.42
Shares after: 51,456
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F13

CLS transaction

Common Shares

Sale

Transaction value: $367,082
Shares: -983
Change %: -1.9%
Price: $373.43
Shares after: 50,473
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F14

CLS transaction

Common Shares

Sale

Transaction value: $575,309
Shares: -1,536
Change %: -3%
Price: $374.55
Shares after: 48,937
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F15

CLS transaction

Common Shares

Sale

Transaction value: $468,136
Shares: -1,247
Change %: -2.5%
Price: $375.41
Shares after: 47,690
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F16

CLS transaction

Common Shares

Sale

Transaction value: $189,003
Shares: -502
Change %: -1.1%
Price: $376.50
Shares after: 47,188
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F17

CLS transaction

Common Shares

Sale

Transaction value: $96,609
Shares: -256
Change %: -0.54%
Price: $377.38
Shares after: 46,932
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1, F18

CLS transaction

Common Shares

Sale

Transaction value: $15,140
Shares: -40
Change %: -0.09%
Price: $378.50
Shares after: 46,892
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number Two
Footnotes: F1

CLS holding

Common Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 453,697
Date: 05 Aug 2026
Ownership: Direct

CLS holding

Common Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 210,445
Date: 05 Aug 2026
Ownership: By Mionis 2026 GRAT Number One

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 18 footnotes

Footnote F1

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

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.74-$361.99, 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.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.00-$362.99, 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.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.00-$363.97, 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.

Footnote F5

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $364.00-$364.79, 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.

Footnote F6

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.21-$365.99, 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.

Footnote F7

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $366.14-$366.78, 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.

Footnote F8

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $367.41-$367.97, 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.

Footnote F9

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $368.01-$368.99, 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.

Footnote F10

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $369.00-$369.99, 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.

Footnote F11

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $370.00-$370.99, 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.

Footnote F12

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $371.00-$371.91, 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.

Footnote F13

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.07-$372.99, 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.

Footnote F14

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $373.03-$373.84, 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.

Footnote F15

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $374.06-$374.96, 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.

Footnote F16

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $375.00-$375.80, 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.

Footnote F17

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $376.08-$376.84, 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.

Footnote F18

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $377.14-$377.48, 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.