Merck & Co., Inc. (MRK) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

2,498,000,000Shares Outstanding

1,975,056,537Shares held by institutions

$223,576,399,988Value of institutional holdings

79.07%Institutional ownership %

2.15%Shares Changed QoQ

3,522No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Merck & Co., Inc. (NYSE:MRK) is held by 3,491 institutional investors per 13F filings through December 2025.

Collectively, these holders controlled 77.8% of Merck's outstanding shares in December 2025, down from 80.4% in September 2025.
They increased total shares held in Merck by 1.46% from last quarter, and the number of investors in MRK increased 0.03% annually.
Of these 3,491 funds, 1,834 grew their exposure to Merck, 1,348 cut back, and 309 maintained positions.
The aggregate institutional position in Merck amounted to 1.94Bn shares as of December 2025, up by 28.04Mn shares quarter on quarter, and down 160.56Mn shares year over year.
Robeco Institutional Asset Management B.V. leads ownership in MRK with 2.32Mn shares as of December 31, 2025, equal to 0.09% of outstanding shares.
Top purchasers of MRK stock for the quarter ending December 2025 included DIAMANT ASSET MANAGEMENT, INC. (2.05Mn), WEALTH ENHANCEMENT ADVISORY SERVICES, LLC (1.43Mn), PBU - The Pension Fund of Early Childhood & Youth Educators (571.27K), Capital Investment Advisors, LLC (376.75K), SG Americas Securities, LLC (274.13K).
The largest sellers of Merck for the quarter ending December 2025 were Cardano Risk Management B.V. (8.64Mn), Auto-Owners Insurance Co (768.4K), BI Asset Management Fondsmaeglerselskab A/S (229.57K), EXCHANGE TRADED CONCEPTS, LLC (226.18K), Union Bancaire Privee, UBP SA (179.01K).
Per Business Quant data, the top 10 holders of Merck for the quarter ending December 2025 are Robeco Institutional Asset Management B.V. (2.32Mn), DIAMANT ASSET MANAGEMENT, INC. (2.07Mn), Janney Montgomery Scott LLC (1.68Mn), SG Americas Securities, LLC (1.67Mn), PBU - The Pension Fund of Early Childhood & Youth Educators (1.49Mn), Pictet Asset Management Holding SA (1.49Mn), WEALTH ENHANCEMENT ADVISORY SERVICES, LLC (1.43Mn), AEGON ASSET MANAGEMENT UK PLC (1.27Mn), BI Asset Management Fondsmaeglerselskab A/S (1.13Mn), STRS OHIO (1.1Mn).

3,562 Institutional Holders

1,975,056,537 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	254,322,763	2,185,853	0.87%	$26,770,014,033.00
BlackRock, Inc.	31 Dec, 2025	219,095,465	4,218,865	1.96%	$23,061,988,586.00
State Street Corp	31 Dec, 2025	120,040,168	1,859,990	1.57%	$12,737,503,943.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	86,435,458	11,156,354	14.82%	$9,098,196,310.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	60,047,984	249,110	0.42%	$6,307,571,859.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	48,563,804	-5,135,656	-9.56%	$5,111,826,930.00
Morgan Stanley	31 Dec, 2025	44,946,021	359,486	0.81%	$4,731,018,465.00
FMR LLC	31 Dec, 2025	40,836,566	7,409,816	22.17%	$4,298,456,848.00
Goldman Sachs Group Inc	31 Dec, 2025	38,693,394	23,672,027	157.59%	$4,072,866,528.00
NORGES BANK	31 Dec, 2025	37,981,502	37,981,502	0.00%	$3,997,932,901.00
Jpmorgan Chase & Co	31 Dec, 2025	29,199,978	-41,203,316	-58.52%	$3,073,589,831.00
Bank Of America Corp /De/	31 Dec, 2025	27,854,441	-25,044,431	-47.34%	$2,931,958,400.00
Northern Trust Corp	31 Dec, 2025	27,234,642	-698,499	-2.50%	$2,866,718,416.00
Fisher Asset Management, LLC	31 Dec, 2025	24,873,327	805,201	3.35%	$2,618,166,478.00
Invesco Ltd.	31 Dec, 2025	20,546,185	701,249	3.53%	$2,162,691,447.00
Legal & General Group Plc	31 Dec, 2025	19,776,842	-882,315	-4.27%	$2,081,710,387.00
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	31 Dec, 2025	19,433,403	-316,462	-1.60%	$2,045,560,000.00
UBS Group AG	31 Dec, 2025	19,178,272	2,272,264	13.44%	$2,018,704,911.00
Bank of New York Mellon Corp	31 Dec, 2025	19,164,526	-2,629,828	-12.07%	$2,017,257,973.00
HSBC HOLDINGS PLC	31 Dec, 2025	16,150,898	7,763,040	92.55%	$1,701,096,834.00

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