Merck corrects officer's holding to 2,871 shares

Maraldo's reported common-stock position was held indirectly through the Merck U.S. Savings Plan stock fund.

This filing corrects an earlier one, and you can read the original Form 3 if you want to see what changed.

Rhea-AI Filing Summary

Merck & Co., Inc.'s Form 3/A corrects the reported common-stock holding of David R. Maraldo, an officer whose title is EVP & Pres. MMD, in the stock fund of the Merck U.S. Savings Plan. The corrected indirect holding was 2,871 shares as of May 1, 2026. The entry reports a holding balance rather than a purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Maraldo David R.

Role EVP & Pres. MMD

Type	Security	Shares	Price	Value
holding	Common Stock - 401(k) Plan F1	--	--	--

Holdings After Transaction: Common Stock - 401(k) Plan — 2,870.7727 shares (Indirect, By 401 (k))

Footnotes (1)

1. F1. This Form 3/A is being filed solely to correct the number of shares of the Issuer's common stock considered to be held by the Reporting Person in the stock fund of the Merck U.S. Savings Plan, a 401(k) plan, as of May 1, 2026.

Key Figures

Common-stock holding: 2,871 shares

1 metrics

Common-stock holding 2,871 shares In the Merck U.S. Savings Plan stock fund as of May 1, 2026

Key Terms

401(k) plan, stock fund, Reporting Person

3 terms

401(k) plan financial

"a 401(k) plan"

A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.

stock fund financial

"in the stock fund of the Merck U.S. Savings Plan"

Reporting Person regulatory

"held by the Reporting Person"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MRK shares did David R. Maraldo report in his 401(k) plan?

David R. Maraldo's corrected holding was 2,871 shares in the Merck U.S. Savings Plan stock fund as of May 1, 2026.

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

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Available on EDGAR 10/22/2026 - 04:06 PM EDT Accepted by SEC EDGAR 10/22/2026 - 04:05 PM EDT Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

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. Date of Event Requiring Statement (Month/Day/Year)
05/01/2026

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

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)
05/04/2026

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

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

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock - 401(k) Plan	2,870.7727(1)	I	By 401 (k)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This Form 3/A is being filed solely to correct the number of shares of the Issuer's common stock considered to be held by the Reporting Person in the stock fund of the Merck U.S. Savings Plan, a 401(k) plan, as of May 1, 2026.

	/s/ Kelly E. W. Grez as Attorney-in-Fact for David R. Maraldo	10/22/2026
	** 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 5 (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 3: SEC 1473 (03-26)