McKesson (MCK) EVP Michele Lau sells 3,550 shares in planned Rule 10b5-1 trade

Rhea-AI Filing Summary

McKesson Corp executive Michele Lau, EVP and Chief Legal Officer, reported an open-market sale of common stock. Lau sold 3,550 shares at $761.09 per share, leaving 3,247 directly held shares after the transaction, plus 139.0253 shares held indirectly through the McKesson Corporation 401(k) Retirement Savings Plan.

The sale occurred on May 26, 2026 and was carried out as an open-market sale designated by transaction code “S”. A footnote states the sale was made pursuant to a previously adopted Rule 10b5-1(c) trading plan dated August 19, 2025, indicating it was pre-planned under SEC rules rather than a discretionary trade based on short-term market conditions.

Insider Trade Summary 10b5-1

Net Seller: 3,550 shares ($2,701,870)

Net Sell 2 txns

Insider Lau Michele

Role EVP and Chief Legal Officer

Sold 3,550 shs ($2.70M)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,550	$761.09	$2.70M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 3,247 shares (Direct, null); Common Stock — 139.025 shares (Indirect, By the McKesson Corporation 401(k) Retirement Savings Plan)

Footnotes (1)

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Key Figures

Shares sold: 3,550 shares Sale price: $761.09 per share Direct holdings after sale: 3,247 shares +3 more

6 metrics

Shares sold 3,550 shares Open-market sale of McKesson common stock on May 26, 2026

Sale price $761.09 per share Price for the 3,550 McKesson shares sold

Direct holdings after sale 3,247 shares Michele Lau’s directly held McKesson common stock post-transaction

Indirect 401(k) holdings 139.0253 shares Shares held via McKesson Corporation 401(k) Retirement Savings Plan

Rule 10b5-1 plan date August 19, 2025 Adoption date of pre-arranged trading plan cited in footnote

Transaction code S Indicates sale in open market or private transaction

Key Terms

Rule 10b5-1(c), open-market sale, McKesson Corporation 401(k) Retirement Savings Plan, Form 4

4 terms

Rule 10b5-1(c) regulatory

"in compliance with Rule 10b5-1(c)."

Rule 10b5-1(c) is an SEC guideline that lets company insiders set up a written, pre-planned schedule to buy or sell their company stock when they are not in possession of material, nonpublic information. For investors, it matters because such plans can reduce the appearance of insider trading by separating decisions from inside knowledge—like putting your trades on autopilot—while also requiring scrutiny since pre-planned trades can still affect market confidence and share value.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

McKesson Corporation 401(k) Retirement Savings Plan financial

"By the McKesson Corporation 401(k) Retirement Savings Plan"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED 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^*

Lau Michele

(Last) (First) (Middle)

6555 NORTH STATE HWY 161

(Street)

IRVING TEXAS 75039

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MCKESSON CORP [ MCK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP and Chief Legal Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/26/2026		S		3,550(1)	D	$761.09	3,247	D
Common Stock								139.0253	I	By the McKesson Corporation 401(k) Retirement Savings Plan

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Sale pursuant to a previously adopted plan dated August 19, 2025, in compliance with Rule 10b5-1(c).

	/s/ Sarah Ahmad Ali, Attorney-in-fact	05/27/2026
	** Signature of Reporting Person	Date
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)

FAQ

What insider transaction did McKesson (MCK) report for Michele Lau?

McKesson reported that EVP and Chief Legal Officer Michele Lau sold 3,550 shares of common stock in an open-market transaction. The sale was executed at $761.09 per share and left her with 3,247 directly held shares afterward.

At what price did Michele Lau sell McKesson (MCK) shares?

Michele Lau’s reported sale was executed at $761.09 per share for 3,550 shares of McKesson common stock. This open-market transaction occurred on May 26, 2026, as disclosed in the Form 4 insider trading report.

How many McKesson (MCK) shares does Michele Lau hold after the reported sale?

After the transaction, Michele Lau directly holds 3,247 shares of McKesson common stock. In addition, she has an indirect interest in 139.0253 shares held through the McKesson Corporation 401(k) Retirement Savings Plan, according to the Form 4 filing.

Was Michele Lau’s McKesson (MCK) stock sale under a Rule 10b5-1 plan?

Yes. A footnote explains the sale was made under a previously adopted plan dated August 19, 2025 in compliance with Rule 10b5-1(c). Such plans pre-schedule trades, reducing the significance of short-term market timing decisions.

What does transaction code "S" mean in Michele Lau’s McKesson (MCK) Form 4?

Transaction code “S” in the Form 4 indicates a sale in the open market or a private transaction. For Michele Lau, this code applies to the disposition of 3,550 shares of McKesson common stock reported on May 26, 2026.