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 3,544 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	$30.29B 244,677,214 shares	0.58%	+1.41M(+0.60%)Added	SEC filing ↗ Aug 13, 2024	▾
02	BlackRock Inc. CIK 1364742 · View history	$25.66B 207,295,317 shares	0.58%	+279.84K(+0.10%)Added	SEC filing ↗ Aug 13, 2024	▾
03	STATE STREET CORP CIK 93751 · View history	$14.63B 117,489,938 shares	0.64%	+64.41K(+0.10%)Added	SEC filing ↗ Aug 14, 2024	▾
04	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$8.97B 72,481,979 shares	1.60%	-13.87M(-16.10%)Reduced	SEC filing ↗ Aug 14, 2024	▾
05	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.04B 57,020,708 shares	0.62%	+609.48K(+1.10%)Added	SEC filing ↗ Aug 9, 2024	▾
06	FMR LLC CIK 315066 · View history	$6.27B 50,653,254 shares	0.40%	-1.52M(-2.90%)Reduced	SEC filing ↗ Aug 13, 2024	▾
07	MORGAN STANLEY CIK 895421 · Amended · View history	$5.23B 42,217,361 shares	0.40%	+711.51K(+1.70%)Added	SEC filing ↗ May 14, 2025	▾
08	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$4.86B 39,280,076 shares	0.47%	+3.27M(+9.10%)Added	SEC filing ↗ Aug 14, 2024	▾
09	NORGES BANK CIK 1374170 · View history	$4.19B 33,806,976 shares	0.63%	+3.87M(+12.90%)Added	SEC filing ↗ Aug 14, 2024	▾
10	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$3.48B 28,086,978 shares	0.30%	+1.43M(+5.30%)Added	SEC filing ↗ Dec 26, 2024	▾
11	NORTHERN TRUST CORP CIK 73124 · View history	$3.32B 26,820,276 shares	0.56%	-279.35K(-1.00%)Reduced	SEC filing ↗ Aug 14, 2024	▾
12	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$3.06B 24,725,061 shares	0.37%	-4.91M(-16.60%)Reduced	SEC filing ↗ Aug 14, 2024	▾
13	DEUTSCHE BANK AG\ CIK 948046 · Amended · View history	$2.58B 20,804,106 shares	1.16%	-438.98K(-2.10%)Reduced	SEC filing ↗ Jun 12, 2025	▾
14	Bank of New York Mellon Corp CIK 1390777 · View history	$2.37B 19,152,290 shares	0.45%	-490.65K(-2.50%)Reduced	SEC filing ↗ Jul 25, 2024	▾
15	Legal & General Group Plc CIK 764068 · Amended · View history	$2.31B 18,687,107 shares	0.65%	-555.93K(-2.90%)Reduced	SEC filing ↗ May 29, 2025	▾
16	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · Amended · View history	$2.26B 18,293,233 shares	0.43%	+643.09K(+3.60%)Added	SEC filing ↗ Aug 12, 2024	▾
17	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history	$2.16B 17,446,365 shares	0.62%	+4.90M(+39.00%)Added	SEC filing ↗ Aug 14, 2024	▾
18	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$2.06B 16,625,085 shares	0.56%	-346.15K(-2.00%)Reduced	SEC filing ↗ Aug 14, 2024	▾
19	DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main CIK 1694217 · Amended · View history	$1.97B 15,906,232 shares	2.16%	+1.19M(+8.10%)Added	SEC filing ↗ May 4, 2026	▾
20	Invesco Ltd. CIK 914208 · View history	$1.96B 15,796,361 shares	0.41%	-262.18K(-1.60%)Reduced	SEC filing ↗ Aug 13, 2024	▾

Showing 20 / 3,544 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

3,544

Cancelled or null records excluded

Disclosed shares

1,955,403,017

Not deduplicated across managers

Disclosed value

$242.23B

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. · Q2 2024

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{"action":"holders","cusip":"58933Y105","quarter":"2024Q2","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.