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MRK

Merck & Co., Inc.
$126.78 -2.78 (-2.15%) At close · Jul 6
Market Cap
$313.12B
Shares
2,469,824,415

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 3,782
Total Value: $229,075,241,291
Total Shares: 1,904,207,946
Showing 1–100 of 3,868 holdings by value · page 1 of 39

Institutional Ownership Trend

26 quarters

Superinvestors Holding MRK

All superinvestors →
Bill Nygren $1,487,618,369 Joel Greenblatt $60,933,019 Prem Watsa $20,798,141 Mario Gabelli $7,791,063 Christopher Bloomstran $5,368,903 Tom Russo $257,540

Holder Concentration

Across 3,782 13F filers
Top Holder
11.9%
Jun 2023 → Mar 2026 · range 11.9% – 12.9%
of institutional value
Top 5
34.1%
Jun 2023 → Mar 2026 · range 34.1% – 36.8%
of institutional value
Top 10
46.0%
Jun 2023 → Mar 2026 · range 44.7% – 46.8%
of institutional value
HHI
334
Jun 2023 → Mar 2026 · range 334 – 389
Broadly held
Showing 100 of 3,868
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $27,165,130,383 11.86% 225,830,330
Mega VANGUARD CAPITAL MANAGEMENT LLC $19,365,201,290 8.45% 160,987,624
Mega STATE STREET CORP $14,353,685,205 6.27% 119,325,673
Mega WELLINGTON MANAGEMENT GROUP LLP $10,142,247,857 4.43% 84,314,971
Mega GEODE CAPITAL MANAGEMENT, LLC $7,164,250,343 3.13% 59,558,154
Mega JPMORGAN CHASE & CO $6,372,120,116 2.78% 52,972,983
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $5,986,258,914 2.61% 49,765,225
Mega MORGAN STANLEY $5,729,711,852 2.50% 47,632,487
Mega FMR LLC $5,354,830,840 2.34% 44,516,010
Mega BANK OF AMERICA CORP /DE/ Bank $3,701,831,041 1.62% 30,774,221
Mega NORTHERN TRUST CORP Bank $3,258,658,860 1.42% 27,090,023
Mega Fisher Asset Management, LLC $3,180,020,602 1.39% 26,436,284
Mega PRICE T ROWE ASSOCIATES INC /MD/ $2,771,823,463 1.21% 23,042,842
Mega Invesco Ltd. $2,628,950,086 1.15% 21,855,101
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $2,455,698,571 1.07% 20,414,819
Mega GOLDMAN SACHS GROUP INC $2,421,844,158 1.06% 20,133,379
Mega Legal & General Group Plc $2,350,291,577 1.03% 19,538,545
Mega Bank of New York Mellon Corp Bank $2,251,030,425 0.98% 18,713,363
Mega FRANKLIN RESOURCES INC $1,956,782,081 0.85% 16,267,205
Mega AMERIPRISE FINANCIAL INC $1,956,241,142 0.85% 16,262,708
Mega DIMENSIONAL FUND ADVISORS LP $1,859,206,929 0.81% 15,456,039
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,679,751,091 0.73% 13,964,179
Mega UBS Group AG $1,676,076,347 0.73% 13,933,630
Mega STATE FARM MUTUAL AUTOMOBILE INSURANCE CO Insurance $1,659,396,821 0.72% 13,794,969
Mega Amundi $1,655,786,310 0.72% 13,764,954
Mega ROYAL BANK OF CANADA Bank $1,588,035,133 0.69% 13,201,722
Mega DEUTSCHE BANK AG\ Bank $1,508,529,698 0.66% 12,540,774
Large HARRIS ASSOCIATES L P $1,487,618,369 0.65% 12,366,933
Mega WELLS FARGO & COMPANY/MN $1,376,940,982 0.60% 11,446,845
Mega ALLIANCEBERNSTEIN L.P. $1,359,455,750 0.59% 11,301,486
Mega Nuveen, LLC $1,214,900,610 0.53% 10,099,764
Mega AQR CAPITAL MANAGEMENT LLC $1,037,920,575 0.45% 8,628,486
Mega NORDEA INVESTMENT MANAGEMENT AB $1,025,832,277 0.45% 8,527,993
Large STIFEL FINANCIAL CORP $997,423,745 0.44% 8,291,826
Large BARROW HANLEY MEWHINNEY & STRAUSS LLC $952,440,099 0.42% 7,917,866
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $930,948,368 0.41% 7,739,200
Mega HSBC HOLDINGS PLC $918,307,324 0.40% 7,634,112
Mega BARCLAYS PLC $909,093,835 0.40% 7,557,518
Mega PNC FINANCIAL SERVICES GROUP, INC. $905,836,743 0.40% 7,530,441
Mega California Public Employees Retirement System Pension $888,111,655 0.39% 7,383,088
Mega Swiss National Bank Bank $876,210,523 0.38% 7,284,151
Large Swedbank AB Bank $853,061,915 0.37% 7,091,711
Large Grantham, Mayo, Van Otterloo & Co. LLC $843,687,235 0.37% 7,013,777
Large Aristotle Capital Management, LLC $829,331,225 0.36% 6,894,432
Mega RAYMOND JAMES FINANCIAL INC $792,171,477 0.35% 6,585,514
Mega Sumitomo Mitsui Trust Group, Inc. $754,136,021 0.33% 6,269,316
Mega JENNISON ASSOCIATES LLC $751,732,746 0.33% 6,249,337
Mega Mitsubishi UFJ Asset Management Co., Ltd. $695,556,355 0.30% 5,782,329
Mega National Pension Service Pension $693,121,324 0.30% 5,762,086
Mega Vanguard Global Advisers, LLC $671,903,131 0.29% 5,585,694
Mega CITADEL ADVISORS LLC $667,826,022 0.29% 5,551,800
Mega AMERICAN CENTURY COMPANIES INC $667,351,838 0.29% 5,547,858
Large DekaBank Deutsche Girozentrale Bank $652,923,533 0.29% 5,427,912
Large VOYA INVESTMENT MANAGEMENT LLC $620,591,025 0.27% 5,159,124
Large LSV ASSET MANAGEMENT $612,120,805 0.27% 5,088,709
Mega VANGUARD ASSET MANAGEMENT, Ltd $601,885,810 0.26% 5,003,623
Mega BANK OF MONTREAL /CAN/ Bank $581,140,353 0.25% 4,831,161
Mega PRINCIPAL FINANCIAL GROUP INC $566,558,921 0.25% 4,709,942
Large Aberdeen Group plc $561,176,064 0.24% 4,665,193
Large Capital Wealth Planning, LLC $543,317,451 0.24% 4,516,730
Mega FIRST TRUST ADVISORS LP $537,163,295 0.23% 4,465,569
Large ACADIAN ASSET MANAGEMENT LLC $505,504,410 0.22% 4,202,381
Large Allianz Asset Management GmbH $476,936,615 0.21% 3,964,890
Mega JANE STREET GROUP, LLC $465,462,155 0.20% 3,869,500
Mega ENVESTNET ASSET MANAGEMENT INC $463,474,483 0.20% 3,852,976
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $461,385,767 0.20% 3,835,612
Mega CITADEL ADVISORS LLC $459,655,395 0.20% 3,821,227
Large Caisse de depot et placement du Quebec $457,027,299 0.20% 3,799,379
Mega RHUMBLINE ADVISERS $456,792,854 0.20% 3,797,430
Mega VICTORY CAPITAL MANAGEMENT INC $455,869,869 0.20% 3,789,757
Mega LPL Financial LLC $454,959,394 0.20% 3,782,188
Mega CITADEL ADVISORS LLC $450,269,528 0.20% 3,743,200
Mid THORNBURG INVESTMENT MANAGEMENT INC $448,522,075 0.20% 3,728,673
Large Bank Julius Baer & Co. Ltd, Zurich Bank $445,099,704 0.19% 3,700,222
Large HighTower Advisors, LLC $437,302,747 0.19% 3,635,404
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $435,073,292 0.19% 3,616,870
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $422,942,647 0.18% 3,516,025
Mega D. E. Shaw & Co., Inc. $408,695,138 0.18% 3,397,582
Mega NEUBERGER BERMAN GROUP LLC $394,653,566 0.17% 3,280,851
Large LAZARD ASSET MANAGEMENT LLC $391,463,475 0.17% 3,254,331
Large AVIVA PLC $389,327,366 0.17% 3,236,573
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $386,660,176 0.17% 3,214,400
Large Beutel, Goodman & Co Ltd. $364,465,588 0.16% 3,029,891
Large FEDERATED HERMES, INC. $361,843,865 0.16% 3,008,096
Large CANADA LIFE ASSURANCE Co Insurance $357,754,728 0.16% 2,974,102
Large NATIXIS ADVISORS, LLC $357,296,184 0.16% 2,970,290
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $353,211,135 0.15% 2,936,330
Large ROYAL LONDON ASSET MANAGEMENT LTD $348,378,364 0.15% 2,896,154
Mega JANUS HENDERSON GROUP PLC $346,459,135 0.15% 2,880,199
Large Eurizon Capital SGR S.p.A. $339,509,262 0.15% 2,822,423
Large Mariner, LLC $336,237,132 0.15% 2,795,221
Mega CITIGROUP INC $334,298,659 0.15% 2,779,106
Large MARSHALL WACE, LLP $334,201,827 0.15% 2,778,301
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $323,272,037 0.14% 2,687,439
Large JONES FINANCIAL COMPANIES LLLP $319,896,940 0.14% 2,659,381
Large Ensign Peak Advisors, Inc $314,318,852 0.14% 2,613,009
Large Russell Investments Group, Ltd. $303,928,435 0.13% 2,526,631
Large MACKENZIE FINANCIAL CORP $302,822,256 0.13% 2,517,435
Mid Smead Capital Management, Inc. $297,284,465 0.13% 2,471,398
Large Corient Private Wealth LLC $292,097,319 0.13% 2,428,276
Key facts CIK 310158 CUSIP 58933Y105 13F (30d) 140 filings 61 filers Visit website Investor relations

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