Celestica (CLS) insider Mionis plans sale of 205,949 shares under Rule 144

Rhea-AI Filing Summary

Celestica Inc. insider Robert Mionis filed to sell common stock of CLS under a planned Rule 144 transaction. The filing lists 205,949 shares of common stock to be sold through Fidelity Brokerage Services LLC on the NYSE, with an indicated value of $74,141,640.00, in a period running through 07/31/2026.

The disclosure also notes prior activity: on 06/15/2026, 140,000 common shares were sold for $56,000,000.00. In addition, several future equity deliveries are referenced as “RSU Vesting” from the issuer, including blocks of 145,565 shares, 53,026 shares, and 7,358 shares scheduled in early February 2026.

Key Figures

Planned shares to be sold: 205,949 shares Value of planned sale: $74,141,640.00 Prior shares sold: 140,000 shares +4 more

7 metrics

Planned shares to be sold 205,949 shares Common stock listed in the securities to be sold section

Value of planned sale $74,141,640.00 Amount associated with 205,949 common shares to be sold

Prior shares sold 140,000 shares Common stock sale on 06/15/2026 in past 3 months section

Value of prior sale $56,000,000.00 Amount for 140,000 common shares sold on 06/15/2026

RSU vesting block 1 145,565 shares Common shares noted as RSU Vesting dated 02/02/2026

RSU vesting block 2 53,026 shares Common shares noted as RSU Vesting dated 02/02/2026

RSU vesting block 3 7,358 shares Common shares noted as RSU Vesting dated 02/04/2026

Key Terms

Rule 144, RSU Vesting, common stock

3 terms

Rule 144 regulatory

"plans to sell common stock of CLS under a planned Rule 144 transaction"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

RSU Vesting financial

"referenced as “RSU Vesting” from the issuer, including blocks of 145,565 shares"

RSU vesting is the process by which restricted stock units — a promise by a company to give shares to an employee — become actual, owned shares over time or when certain goals are met. Investors care because vested shares can dilute existing ownership when issued, and the timing of vesting affects when employees can sell shares, which can influence share supply, insider selling patterns, and company incentives.

common stock financial

"205,949 shares of common stock to be sold through Fidelity Brokerage Services LLC"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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

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Available on EDGAR 07/31/2026 - 04:10 PM Accepted by SEC EDGAR 07/31/2026 - 04:09 PM Learn about SEC filing dates

FAQ

What does Celestica (CLS) disclose in this Form 144 filing?

The filing shows Robert Mionis planning to sell Celestica common stock under Rule 144, listing 205,949 shares with an indicated value of $74,141,640.00, and referencing prior and future equity-related transactions.

How many Celestica (CLS) shares are planned for sale under Rule 144?

The document lists 205,949 common shares of Celestica to be sold through Fidelity Brokerage Services LLC on the NYSE, with an associated value of $74,141,640.00 over the stated period.

What prior Celestica (CLS) stock sale is reported in the past 3 months section?

The past 3 months section reports a sale on 06/15/2026 of 140,000 Celestica common shares for an amount of $56,000,000.00, attributed to Robert Mionis.

Which broker is handling the planned Celestica (CLS) share sales?

The planned transactions list Fidelity Brokerage Services LLC, located at 245 Summer Street, Boston, MA 02110, as the broker for selling the Celestica common stock on the NYSE.

What RSU vesting events are mentioned for Celestica (CLS)?

Several RSU Vesting events are noted, including common share deliveries of 145,565 shares, 53,026 shares, and 7,358 shares scheduled around 02/02/2026 and 02/04/2026 from the issuer.

Over what period are the Celestica (CLS) Rule 144 sales planned?

The securities information section references a period running to 07/31/2026 for the planned sale of 205,949 Celestica common shares via the NYSE through Fidelity Brokerage Services LLC.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common stock	Fidelity Brokerage Services LLC 245 Summer Street Boston MA 02110	205949	74141640.00	114973107	07/31/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/04/2026	RSU Vesting	Issuer			7358	02/04/2026	RSU Vesting
Common	02/02/2026	RSU Vesting	Issuer			145565	02/02/2026	RSU Vesting
Common	02/02/2026	RSU Vesting	Issuer			53026	02/02/2026	RSU Vesting

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
MIONIS ROBERT 5140 Yonge St Suite 1900 Toronto A6 M2N6L7	Common	06/15/2026	140000	56000000.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)