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Celestica CEO-linked GRATs sell 98,453 shares

Celestica Inc. Chief Executive Officer Robert Mionis reported indirect sales of 98,453 common shares by Mionis 2026 GRAT entities on August 4, 2026.

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

Celestica Inc. Chief Executive Officer Robert Mionis reported indirect sales of 98,453 common shares by Mionis 2026 GRAT entities on August 4, 2026. The non-derivative sales were executed in multiple open-market transactions at weighted-average prices, with individual trade prices within disclosed ranges from $360.00 to $374.43 per share, pursuant to a Rule 10b5-1 trading plan adopted on March 11, 2026.

After these transactions, reported holdings comprised 453,697 common shares held directly and 210,445 shares held indirectly through Mionis 2026 GRAT Number One.

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Insider MIONIS ROBERT
Role Chief Executive Officer
Sold 98,453 shs ($36.33M)
Type Security Shares Price Value
Sale Common Shares F1, F2 9,564 $360.28 $3.45M
Sale Common Shares F1, F3 1,331 $361.52 $481K
Sale Common Shares F1, F4 1,895 $362.35 $687K
Sale Common Shares F1, F5 5,887 $363.57 $2.14M
Sale Common Shares F1, F6 1,940 $364.58 $707K
Sale Common Shares F1, F7 1,939 $365.53 $709K
Sale Common Shares F1, F8 5,254 $366.72 $1.93M
Sale Common Shares F1, F9 5,629 $367.64 $2.07M
Sale Common Shares F1, F10 5,841 $368.60 $2.15M
Sale Common Shares F1, F11 3,522 $369.31 $1.30M
Sale Common Shares F1, F12 447 $370.37 $166K
Sale Common Shares F1, F13 2,401 $371.67 $892K
Sale Common Shares F1, F14 3,986 $372.42 $1.48M
Sale Common Shares F1, F15 1,205 $373.34 $450K
Sale Common Shares F1, F16 1,717 $360.43 $619K
Sale Common Shares F1, F17 1,051 $361.66 $380K
Sale Common Shares F1, F18 5,785 $371.63 $2.15M
Sale Common Shares F1, F19 22,375 $372.48 $8.33M
Sale Common Shares F1, F20 13,131 $373.43 $4.90M
Sale Common Shares F1, F21 3,553 $374.16 $1.33M
holding Common Shares -- -- --
holding Common Shares -- -- --
Holdings After Transaction: Common Shares — 0 shares (Indirect, By Mionis 2026 GRAT Number Three); Common Shares — 97,953 shares (Indirect, By Mionis 2026 GRAT Number Two); Common Shares — 453,697 shares (Direct); Common Shares — 210,445 shares (Indirect, By Mionis 2026 GRAT Number One)
Footnotes (21)
  1. F1. This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 11, 2026.
  2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.00-$360.96, 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.
  3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.03-$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.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.00-$362.77, 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. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.03-$363.99, 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.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $364.11-$364.99, 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.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.24-$365.87, 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. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $366.01-$366.99, 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.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $367.00-$367.99, 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.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $368.00-$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.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $369.00-$369.81, 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. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $370.10-$370.77, 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. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $371.13-$371.97, 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.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.06-372.95, 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. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $373.07-$373.88, 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. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.00-$360.65, 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.
  17. F17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.18-$361.92, 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.
  18. F18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $371.04-$371.99, 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.
  19. F19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.00-$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.
  20. F20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $373.00-$373.98, 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.
  21. F21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $374.00-$374.43, 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.
Common shares sold 98,453 shares Non-derivative insider sales by GRAT entities on August 4, 2026
Lowest disclosed sale price $360.00 per share Lower bound of price ranges in weighted-average sale footnotes
Highest disclosed sale price $374.43 per share Upper bound of price ranges in weighted-average sale footnotes
Direct holdings after transactions 453,697 shares Common shares held directly by the reporting person as of August 4, 2026
Indirect holdings via GRAT Number One 210,445 shares Common shares held indirectly through Mionis 2026 GRAT Number One
Rule 10b5-1 plan financial
"This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person"
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
weighted average price financial
"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
GRAT financial
"nature_of_ownership: By Mionis 2026 GRAT Number Two"

FAQ

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

What insider share sale did Celestica (CLS) disclose for Robert Mionis?
Celestica disclosed that CEO Robert Mionis indirectly sold 98,453 common shares on August 4, 2026 through Mionis 2026 GRAT entities in open-market transactions reported on a Form 4 filing.

At what prices were the Celestica (CLS) shares sold in the Mionis Form 4?
The reported sales occurred at weighted-average prices, with individual trades executed within disclosed ranges between $360.00 and $374.43 per share, as detailed in the Form 4 footnotes for each transaction group.

Were the Celestica (CLS) insider sales by Robert Mionis under a Rule 10b5-1 plan?
Yes. The filing states the transactions were effected pursuant to a Rule 10b5-1 plan adopted by Robert Mionis on March 11, 2026, indicating the sales followed a pre-established trading arrangement.

How many Celestica (CLS) shares does Robert Mionis report holding after these sales?
After the reported sales, holdings included 453,697 common shares held directly and 210,445 shares held indirectly through Mionis 2026 GRAT Number One, according to the holding entries in the Form 4.

Which entities executed the Celestica (CLS) share sales reported for Robert Mionis?
The sales involved common shares held indirectly By Mionis 2026 GRAT Number Two and By Mionis 2026 GRAT Number Three, as indicated in the nature-of-ownership descriptions for the Form 4 sale transactions.

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

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SEC Form 4
FORM 4UNITED 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).
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*
MIONIS ROBERT
(Last)(First)(Middle)
5140 YONGE STREET
SUITE 1900
(Street)
TORONTOM2N 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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Chief Executive Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/04/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Shares08/04/2026S(1)9,564D$360.28(2)41,277IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)1,331D$361.52(3)39,946IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)1,895D$362.35(4)38,051IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)5,887D$363.57(5)32,164IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)1,940D$364.58(6)30,224IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)1,939D$365.53(7)28,285IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)5,254D$366.72(8)23,031IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)5,629D$367.64(9)17,402IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)5,841D$368.6(10)11,561IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)3,522D$369.31(11)8,039IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)447D$370.37(12)7,592IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)2,401D$371.67(13)5,191IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)3,986D$372.42(14)1,205IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)1,205D$373.34(15)0IBy Mionis 2026 GRAT Number Three
Common Shares08/04/2026S(1)1,717D$360.43(16)143,848IBy Mionis 2026 GRAT Number Two
Common Shares08/04/2026S(1)1,051D$361.66(17)142,797IBy Mionis 2026 GRAT Number Two
Common Shares08/04/2026S(1)5,785D$371.63(18)137,012IBy Mionis 2026 GRAT Number Two
Common Shares08/04/2026S(1)22,375D$372.48(19)114,637IBy Mionis 2026 GRAT Number Two
Common Shares08/04/2026S(1)13,131D$373.43(20)101,506IBy Mionis 2026 GRAT Number Two
Common Shares08/04/2026S(1)3,553D$374.16(21)97,953IBy Mionis 2026 GRAT Number Two
Common Shares453,697D
Common Shares210,445IBy Mionis 2026 GRAT Number One
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
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 $360.00-$360.96, 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.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.03-$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.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.00-$362.77, 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 $363.03-$363.99, 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.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $364.11-$364.99, 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.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.24-$365.87, 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 $366.01-$366.99, 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.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $367.00-$367.99, 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.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $368.00-$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.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $369.00-$369.81, 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 $370.10-$370.77, 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 $371.13-$371.97, 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.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.06-372.95, 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 $373.07-$373.88, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.00-$360.65, 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.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.18-$361.92, 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.
18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $371.04-$371.99, 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.
19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $372.00-$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.
20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $373.00-$373.98, 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.
21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $374.00-$374.43, 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.
/s/ Tracy Connelly McGilley, attorney-in-fact08/06/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

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