Company · Ownership research

Merck & Co., Inc. MRK

CIK 0000310158 · CUSIP 58933Y105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 58933Y105 (MRK), not CUSIP 58933Y905 (MRK), CUSIP 58933Y955 (MRK), CUSIP 589331107 (MRK), and does not merge CUSIPs.

This page lists the top 20 of 3,534 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	VANGUARD GROUP INC CIK 102909 · View history	$32.10B 243,269,899 shares	0.64%	-1.51M(-0.60%)Reduced	SEC filing ↗ May 10, 2024	▾
02	BlackRock Inc. CIK 1364742 · View history	$27.32B 207,015,477 shares	0.64%	+5.18M(+2.60%)Added	SEC filing ↗ May 10, 2024	▾
03	STATE STREET CORP CIK 93751 · View history	$15.58B 117,425,530 shares	0.70%	+559.55K(+0.50%)Added	SEC filing ↗ May 15, 2024	▾
04	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$11.39B 86,348,259 shares	2.02%	+752.26K(+0.90%)Added	SEC filing ↗ May 15, 2024	▾
05	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.43B 56,411,229 shares	0.69%	+982.98K(+1.80%)Added	SEC filing ↗ May 13, 2024	▾
06	FMR LLC CIK 315066 · View history	$6.88B 52,170,919 shares	0.46%	+9.37M(+21.90%)Added	SEC filing ↗ May 13, 2024	▾
07	MORGAN STANLEY CIK 895421 · Amended · View history	$5.48B 41,505,855 shares	0.44%	+1.38M(+3.40%)Added	SEC filing ↗ Oct 17, 2024	▾
08	BANK OF AMERICA CORP /DE/ CIK 70858 · Amended · View history	$4.75B 36,011,954 shares	0.47%	-1.98M(-5.20%)Reduced	SEC filing ↗ May 15, 2024	▾
09	NORGES BANK CIK 1374170 · Amended · View history	$3.95B 29,933,953 shares	0.62%	+1.42M(+5.00%)Added	SEC filing ↗ May 14, 2024	▾
10	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$3.91B 29,639,517 shares	0.48%	-447.70K(-1.50%)Reduced	SEC filing ↗ May 15, 2024	▾
11	NORTHERN TRUST CORP CIK 73124 · View history	$3.58B 27,099,626 shares	0.62%	-1.39M(-4.90%)Reduced	SEC filing ↗ May 14, 2024	▾
12	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$3.52B 26,660,917 shares	0.31%	+764.40K(+3.00%)Added	SEC filing ↗ Dec 26, 2024	▾
13	DEUTSCHE BANK AG\ CIK 948046 · Amended · View history	$2.80B 21,243,087 shares	1.30%	-330.69K(-1.50%)Reduced	SEC filing ↗ Jun 2, 2025	▾
14	Bank of New York Mellon Corp CIK 1390777 · View history	$2.59B 19,642,939 shares	0.50%	-1.19M(-5.70%)Reduced	SEC filing ↗ Apr 25, 2024	▾
15	Legal & General Group Plc CIK 764068 · Amended · View history	$2.54B 19,243,035 shares	0.73%	-144.65K(-0.70%)Reduced	SEC filing ↗ May 29, 2025	▾
16	FRANKLIN RESOURCES INC CIK 38777 · View history	$2.33B 17,693,268 shares	0.74%	+7.58M(+74.90%)Added	SEC filing ↗ May 13, 2024	▾
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$2.29B 17,650,140 shares	0.53%	-19.03M(-51.90%)Reduced	SEC filing ↗ May 9, 2024	▾
18	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$2.24B 16,971,232 shares	0.62%	+557.93K(+3.40%)Added	SEC filing ↗ May 15, 2024	▾
19	Nuveen Asset Management, LLC CIK 1521019 · View history	$2.18B 16,544,547 shares	0.65%	-158.15K(-0.90%)Reduced	SEC filing ↗ May 13, 2024	▾
20	WELLS FARGO & COMPANY/MN CIK 72971 · View history	$2.16B 16,376,700 shares	0.57%	+114.18K(+0.70%)Added	SEC filing ↗ May 10, 2024	▾

Showing 20 / 3,534 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

3,534

Cancelled or null records excluded

Disclosed shares

1,948,118,624

Not deduplicated across managers

Disclosed value

$256.80B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Merck & Co., Inc. · Q1 2024

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{"action":"holders","cusip":"58933Y105","quarter":"2024Q1","type":"positions","page_size":100}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.