MCK affiliate to sell 4,929 shares (NYSE: MCK) — Brian S. Tyler

Rhea-AI Filing Summary

MCK affiliate reported proposed sale of Common Stock via a Form 144 notice. The filing identifies Brian S. Tyler as the reporting person and shows a sale dated 06/09/2026 of 4,929 shares of Common Stock for $3,760,827.00. The filing header is dated 06/17/2026.

Key Figures

Form header date: 06/17/2026 Shares proposed/sold: 4,929 shares Dollar figure shown: $3,760,827.00 +2 more

5 metrics

Form header date 06/17/2026 filing header date

Shares proposed/sold 4,929 shares sale dated 06/09/2026 in "Securities Sold During The Past 3 Months"

Dollar figure shown $3,760,827.00 associated with the 06/09/2026 4,929-share entry

Restricted stock vesting date 05/19/2026 "Securities To Be Sold" listed as Restricted Stock Vesting

Exchange listed NYSE exchange referenced in filing header

Key Terms

Form 144, Restricted Stock Vesting, Compensation, Issuer

4 terms

Form 144 regulatory

""Securities Sold During The Past 3 Months" section showing the proposed sale"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Vesting financial

""Securities To Be Sold | 05/19/2026 | Restricted Stock Vesting""

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Compensation financial

"listed as the transaction type in the "Securities To Be Sold" row"

Issuer regulatory

""Securities To Be Sold" row shows "Issuer" as the source"

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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

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	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	8463	6559925.19	120204051	06/17/2026	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	05/19/2026	Restricted Stock Vesting	Issuer			8463	05/19/2026	Compensation

* 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
Brian S. Tyler 6555 State Hwy 161 Irving TX 75039	Common	06/09/2026	4929	3760827.00

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)

FAQ

What does the MCK Form 144 disclose about the transaction?

The Form 144 discloses a proposed sale by Brian S. Tyler of 4,929 shares of Common Stock dated 06/09/2026. The filing lists a corresponding dollar figure of $3,760,827.00 and a header date of 06/17/2026.

Who is the reporting person on the MCK Form 144?

The filing lists Brian S. Tyler at the address shown as the reporting person. It identifies him in the "Securities Sold During The Past 3 Months" section tied to the 06/09/2026 transaction.

What security type and source are listed in the filing?

The Form 144 references Common Stock. The "Securities To Be Sold" section notes Restricted Stock Vesting with a date of 05/19/2026 and labels the transaction type as Compensation.

When was the Form 144 header dated and where is the security listed?

The filing header shows a date of 06/17/2026 and indicates trading on the NYSE. The security specifics in the excerpt reference activity around 05/19/2026 and 06/09/2026.