Merck (MRK) EVP gains shares via RSU vesting and tax withholding

Rhea-AI Filing Summary

Merck & Co., Inc. executive David R. Maraldo reported routine equity compensation activity involving restricted stock units that convert into common shares. On May 2, 2026, 552 restricted stock units vested and were exercised into 552 shares of common stock. To cover related tax obligations, 159 shares were disposed of in a tax-withholding transaction at $112.16 per share, a non-market sale handled by the company. Following these transactions, Maraldo directly holds about 18,212.434 Merck common shares. The vested restricted stock units are part of an award scheduled to vest in three equal installments on May 2 of 2024, 2025, and 2026.

Insider Trade Summary

552 shares exercised/converted

Mixed 3 txns

Insider Maraldo David R.

Role EVP & Pres. MMD

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	552	$0.00	--
Exercise	Common Stock	552	$112.16	$62K
Tax Withholding	Common Stock	159	$112.16	$18K

Holdings After Transaction: Restricted Stock Unit — 0 shares (Direct, null); Common Stock — 18,371.434 shares (Direct, null)

Footnotes (1)

1. Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/2/2024, 5/2/2025, and 5/2/2026.

Key Figures

RSUs exercised: 552 units Shares withheld for taxes: 159 shares Price per share for tax withholding: $112.16 per share +2 more

5 metrics

RSUs exercised 552 units Restricted stock units converting into Merck common stock on May 2, 2026

Shares withheld for taxes 159 shares Tax-withholding disposition at $112.16 per share on May 2, 2026

Price per share for tax withholding $112.16 per share Value used for the 159-share tax-withholding disposition

Shares held after transaction 18,212.434 shares Direct Merck common stock holdings after tax-withholding disposition

RSU vesting schedule 3 equal installments Vesting on 5/2/2024, 5/2/2025, and 5/2/2026

Key Terms

Restricted Stock Unit, tax-withholding disposition, derivative exercise/conversion

3 terms

Restricted Stock Unit financial

"Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock."

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

tax-withholding disposition financial

"Payment of exercise price or tax liability by delivering securities"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

derivative exercise/conversion financial

"Exercise or conversion of derivative security"

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).

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^*

Maraldo David R.

(Last) (First) (Middle)

126 EAST LINCOLN AVENUE

(Street)

RAHWAY NEW JERSEY 07065

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Merck & Co., Inc. [ MRK ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & Pres. MMD

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/02/2026

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	05/02/2026		M		552	A	$112.16	18,371.434	D
Common Stock	05/02/2026		F		159	D	$112.16	18,212.434	D

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
Restricted Stock Unit	(1)	05/02/2026		M			552	05/02/2024(2)	05/02/2026	Common Stock	552	$0	0	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

2. These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/2/2024, 5/2/2025, and 5/2/2026.

	/s/ Kelly E. W. Grez as Attorney-in-Fact for David R. Maraldo	05/05/2026
	** 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)