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Celestica Inc (NYSE: CLS) CEO sells 51,061 shares via trust plan

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

Rhea-AI Filing Summary

CELESTICA INC Chief Executive Officer Robert Mionis reported indirect sales of 51,061 Common Shares on August 5, 2026 through Mionis 2026 GRAT Number Two, at weighted average prices between $361.89 and $378.50 per share under a Rule 10b5-1 plan adopted March 11, 2026. Following these trades, he reports holdings of 453,697 Common Shares directly and 210,445 indirectly via Mionis 2026 GRAT Number One.

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Insider MIONIS ROBERT
Role Chief Executive Officer
Sold 51,061 shs ($18.81M)
Type Security Shares Price Value
Sale Common Shares F1, F2 1,092 $361.89 $395K
Sale Common Shares F1, F3 5,909 $362.38 $2.14M
Sale Common Shares F1, F4 3,419 $363.56 $1.24M
Sale Common Shares F1, F5 3,501 $364.20 $1.28M
Sale Common Shares F1, F6 1,061 $365.67 $388K
Sale Common Shares F1, F7 50 $366.65 $18K
Sale Common Shares F1, F8 1,070 $367.76 $394K
Sale Common Shares F1, F9 4,358 $368.57 $1.61M
Sale Common Shares F1, F10 13,414 $369.47 $4.96M
Sale Common Shares F1, F11 6,674 $370.45 $2.47M
Sale Common Shares F1, F12 4,876 $371.45 $1.81M
Sale Common Shares F1, F13 1,073 $372.42 $400K
Sale Common Shares F1, F14 983 $373.43 $367K
Sale Common Shares F1, F15 1,536 $374.55 $575K
Sale Common Shares F1, F16 1,247 $375.41 $468K
Sale Common Shares F1, F17 502 $376.50 $189K
Sale Common Shares F1, F18 256 $377.38 $97K
Sale Common Shares F1 40 $378.50 $15K
holding Common Shares -- -- --
holding Common Shares -- -- --
Holdings After Transaction: Common Shares — 46,892 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 (18)
  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 $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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  12. 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.
  13. 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.
  14. 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.
  15. 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.
  16. 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.
  17. 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.
  18. 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.
Shares sold 51,061 Common Shares Total non-derivative shares sold on August 5, 2026 by Mionis 2026 GRAT Number Two
Sale price range (weighted averages) $361.89–$378.50 per share Weighted average prices reported for individual sale tranches on August 5, 2026
Direct holdings after transactions 453,697 Common Shares Shares held directly by Robert Mionis as of August 5, 2026
Indirect holdings after transactions 210,445 Common Shares Shares held indirectly via Mionis 2026 GRAT Number One as of August 5, 2026
Number of sale transactions 18 Separate non-derivative sale entries reported on August 5, 2026
Rule 10b5-1 plan adoption date March 11, 2026 Date the CEO adopted the trading plan governing these sales
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."
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.
Mionis 2026 GRAT Number Two financial
"nature_of_ownership: "By Mionis 2026 GRAT Number Two""

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FAQ

What insider activity did Celestica (CLS) disclose for CEO Robert Mionis?
Celestica reported that CEO Robert Mionis indirectly sold 51,061 Common Shares on August 5, 2026. The sales were executed by Mionis 2026 GRAT Number Two and reported as open-market or private transactions under a pre-arranged Rule 10b5-1 trading plan.

At what prices were the Celestica (CLS) shares sold in Mionis's August 5, 2026 transactions?
The reported weighted average sale prices for the tranches ranged from $361.89 to $378.50 per share. Footnotes state these averages reflect multiple trades within narrower ranges, from $361.74 on the low end to $377.48 on the high end.

Were the Celestica (CLS) CEO's August 2026 share sales under a Rule 10b5-1 plan?
Yes. A footnote states the transactions were effected pursuant to a Rule 10b5-1 plan adopted by Robert Mionis on March 11, 2026. The filing also checks the Rule 10b5-1 affirmation box for these reported trades.

How many Celestica (CLS) shares does CEO Robert Mionis hold after these reported sales?
After the reported transactions, Robert Mionis holds 453,697 Common Shares directly. He also reports indirect ownership of 210,445 Common Shares held through Mionis 2026 GRAT Number One, according to the holding entries dated August 5, 2026.

How are the Celestica (CLS) CEO's holdings structured between direct and trust ownership?
Robert Mionis reports direct ownership of 453,697 Celestica Common Shares. He also reports indirect ownership of 210,445 shares through Mionis 2026 GRAT Number One, while the August 5 sales were executed by a separate trust, Mionis 2026 GRAT Number Two.

How many separate sale transactions did the Celestica (CLS) CEO report on August 5, 2026?
The Form 4 lists 18 separate non-derivative sale entries for Celestica Common Shares on August 5, 2026. All are coded as open-market or private sales, executed indirectly through Mionis 2026 GRAT Number Two and summarized as 51,061 shares sold in total.
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)
08/05/2026		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 Shares08/05/2026S(1)1,092D$361.89(2)96,861IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)5,909D$362.38(3)90,952IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)3,419D$363.56(4)87,533IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)3,501D$364.2(5)84,032IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)1,061D$365.67(6)82,971IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)50D$366.65(7)82,921IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)1,070D$367.76(8)81,851IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)4,358D$368.57(9)77,493IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)13,414D$369.47(10)64,079IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)6,674D$370.45(11)57,405IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)4,876D$371.45(12)52,529IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)1,073D$372.42(13)51,456IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)983D$373.43(14)50,473IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)1,536D$374.55(15)48,937IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)1,247D$375.41(16)47,690IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)502D$376.5(17)47,188IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)256D$377.38(18)46,932IBy Mionis 2026 GRAT Number Two
Common Shares08/05/2026S(1)40D$378.546,892IBy 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 $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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.
13. 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.
14. 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.
15. 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.
16. 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.
17. 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.
18. 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.
/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