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Equibles

MRK

Merck & Co., Inc.

Company with tickers: MRK

CIK
310158
CUSIP
58933Y105
Shares Outstanding
2,469,824,415
13F Activity (30d)
846 filings 724 filers

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.

Holders: 3,710
Total Value: $162,493,023,165
Total Shares: 1,350,844,006
Showing 1–100 of 3,784 holdings by value · page 1 of 38

Institutional Ownership Trend

25 quarters

Superinvestors Holding MRK

All superinvestors →
Bill Nygren $1,487,618,369 Joel Greenblatt $60,933,019 Prem Watsa $20,798,141 Mario Gabelli $6,839,057 Christopher Bloomstran $5,368,903 Tom Russo $257,540

Holder Concentration

Across 3,710 13F filers · Δ vs Dec 31, 2025
Top Holder
13.8%
Jun 2023 → Mar 2026 · range 12.3% – 13.8%
+0.6 pts
Top 5
35.8%
Jun 2023 → Mar 2026 · range 27.9% – 37.4%
+7.9 pts
Top 10
43.9%
Jun 2023 → Mar 2026 · range 36.8% – 47.5%
+7.0 pts
HHI
379
Jun 2023 → Mar 2026 · range 278 – 405
Broadly held+101

Quarterly Activity

vs Dec 31, 2025
New
347
Increased
1,411
Decreased
1,528
Sold Out
207
Unchanged
424
Holder count: +140
Institutional value: +70.4%
Shares held: +49.1%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega Nuveen, LLC +3,141,695 10,099,764
Large ACADIAN ASSET MANAGEMENT LLC +2,607,712 4,202,381
Large VOYA INVESTMENT MANAGEMENT LLC +2,172,653 5,159,124
Large JONES FINANCIAL COMPANIES LLLP +1,779,735 2,659,381
Mega Fisher Asset Management, LLC +1,562,957 26,436,284

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP −7,007,793 2,936,330
Large LOS ANGELES CAPITAL MANAGEMENT LLC −3,715,117 131,751
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −3,622,511 11,986,822
Mega NORDEA INVESTMENT MANAGEMENT AB −2,045,828 8,527,993
Mid Aptus Capital Advisors, LLC −1,514,787 192,739

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 347,311,390 $41,778,087,102
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC 49,765,225 $5,986,258,914
Mega VANGUARD FIDUCIARY TRUST CO 13,964,179 $1,679,751,091
Mega ROYAL BANK OF CANADA 13,351,722 $1,606,078,633
Mega CITADEL ADVISORS LLC 13,116,227 $1,577,750,945

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega UBS Group AG 20,100,172 $2,115,744,101
Mid Pacer Advisors, Inc. 4,351,397 $458,028,048
Mid Smead Capital Management, Inc. 2,838,300 $298,759,458
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. 2,654,500 $279,412,668
Large Thrivent Financial for Lutherans 2,407,392 $253,402,081
Filter: New 347 Increased 1,411 Reduced 1,528 Sold out 207 Unchanged 424
Showing 100 of 3,784
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega VANGUARD CAPITAL MANAGEMENT LLC $22,412,885,812 13.79% 186,323,766
Mega VANGUARD CAPITAL MANAGEMENT LLC $19,365,201,290 11.92% 160,987,624
Mega STATE STREET CORP $14,353,685,205 8.83% 119,325,673
Mega GEODE CAPITAL MANAGEMENT, LLC $7,164,250,343 4.41% 59,558,154
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $5,986,258,914 3.68% 49,765,225
Mega NORTHERN TRUST CORP Bank $3,258,658,860 2.01% 27,090,023
Mega Fisher Asset Management, LLC $3,180,020,602 1.96% 26,436,284
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $2,455,698,571 1.51% 20,414,819
Mega Legal & General Group Plc $2,350,291,577 1.45% 19,538,545
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,679,751,091 1.03% 13,964,179
Mega STATE FARM MUTUAL AUTOMOBILE INSURANCE CO Insurance $1,659,396,821 1.02% 13,794,969
Mega ROYAL BANK OF CANADA Bank $1,588,035,133 0.98% 13,201,722
Mega DEUTSCHE BANK AG\ Bank $1,508,529,698 0.93% 12,540,774
Large HARRIS ASSOCIATES L P $1,487,618,369 0.92% 12,366,933
Mega ALLIANCEBERNSTEIN L.P. $1,359,455,750 0.84% 11,301,486
Mega Nuveen, LLC $1,214,900,610 0.75% 10,099,764
Mega NORDEA INVESTMENT MANAGEMENT AB $1,025,832,277 0.63% 8,527,993
Large STIFEL FINANCIAL CORP $997,423,745 0.61% 8,291,826
Large BARROW HANLEY MEWHINNEY & STRAUSS LLC $952,440,099 0.59% 7,917,866
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $930,948,368 0.57% 7,739,200
Mega HSBC HOLDINGS PLC $918,307,324 0.57% 7,634,112
Mega PNC FINANCIAL SERVICES GROUP, INC. $905,836,743 0.56% 7,530,441
Mega California Public Employees Retirement System Pension $888,111,655 0.55% 7,383,088
Mega Swiss National Bank Bank $876,210,523 0.54% 7,284,151
Large Swedbank AB Bank $853,061,915 0.52% 7,091,711
Large Aristotle Capital Management, LLC $829,331,225 0.51% 6,894,432
Mega RAYMOND JAMES FINANCIAL INC $792,171,477 0.49% 6,585,514
Mega Mitsubishi UFJ Asset Management Co., Ltd. $695,556,355 0.43% 5,782,329
Mega National Pension Service Pension $693,121,324 0.43% 5,762,086
Mega Vanguard Global Advisers, LLC $671,903,131 0.41% 5,585,694
Mega CITADEL ADVISORS LLC $667,826,022 0.41% 5,551,800
Mega AMERICAN CENTURY COMPANIES INC $667,351,838 0.41% 5,547,858
Large DekaBank Deutsche Girozentrale Bank $652,923,533 0.40% 5,427,912
Large VOYA INVESTMENT MANAGEMENT LLC $620,591,025 0.38% 5,159,124
Large LSV ASSET MANAGEMENT $612,120,805 0.38% 5,088,709
Mega VANGUARD ASSET MANAGEMENT, Ltd $601,885,810 0.37% 5,003,623
Mega BANK OF MONTREAL /CAN/ Bank $581,140,353 0.36% 4,831,161
Mega PRINCIPAL FINANCIAL GROUP INC $566,558,921 0.35% 4,709,942
Large Aberdeen Group plc $561,176,064 0.35% 4,665,193
Large Capital Wealth Planning, LLC $543,317,451 0.33% 4,516,730
Mega FIRST TRUST ADVISORS LP $537,163,295 0.33% 4,465,569
Large ACADIAN ASSET MANAGEMENT LLC $505,504,410 0.31% 4,202,381
Large Allianz Asset Management GmbH $476,936,615 0.29% 3,964,890
Mega ENVESTNET ASSET MANAGEMENT INC $463,474,483 0.29% 3,852,976
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $461,385,767 0.28% 3,835,612
Mega CITADEL ADVISORS LLC $459,655,395 0.28% 3,821,227
Large Caisse de depot et placement du Quebec $457,027,299 0.28% 3,799,379
Mega RHUMBLINE ADVISERS $456,792,854 0.28% 3,797,430
Mega LPL Financial LLC $454,959,394 0.28% 3,782,188
Mega CITADEL ADVISORS LLC $450,269,528 0.28% 3,743,200
Mid THORNBURG INVESTMENT MANAGEMENT INC $448,522,075 0.28% 3,728,673
Large Bank Julius Baer & Co. Ltd, Zurich Bank $445,099,704 0.27% 3,700,222
Large HighTower Advisors, LLC $437,302,747 0.27% 3,635,404
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $435,073,292 0.27% 3,616,870
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $422,942,647 0.26% 3,516,025
Mega D. E. Shaw & Co., Inc. $408,695,138 0.25% 3,397,582
Mega NEUBERGER BERMAN GROUP LLC $394,653,566 0.24% 3,280,851
Large LAZARD ASSET MANAGEMENT LLC $391,463,475 0.24% 3,254,331
Large AVIVA PLC $389,327,366 0.24% 3,236,573
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $386,660,176 0.24% 3,214,400
Large Beutel, Goodman & Co Ltd. $364,465,588 0.22% 3,029,891
Large CANADA LIFE ASSURANCE Co Insurance $357,754,728 0.22% 2,974,102
Large NATIXIS ADVISORS, LLC $357,296,184 0.22% 2,970,290
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $353,211,135 0.22% 2,936,330
Large ROYAL LONDON ASSET MANAGEMENT LTD $348,378,364 0.21% 2,896,154
Large Eurizon Capital SGR S.p.A. $339,509,262 0.21% 2,822,423
Large Mariner, LLC $336,237,132 0.21% 2,795,221
Mega CITIGROUP INC $334,298,659 0.21% 2,779,106
Large MARSHALL WACE, LLP $334,201,827 0.21% 2,778,301
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $323,272,037 0.20% 2,687,439
Large JONES FINANCIAL COMPANIES LLLP $319,896,940 0.20% 2,659,381
Large Ensign Peak Advisors, Inc $314,318,852 0.19% 2,613,009
Large Russell Investments Group, Ltd. $303,928,435 0.19% 2,526,631
Large MACKENZIE FINANCIAL CORP $302,822,256 0.19% 2,517,435
Large Corient Private Wealth LLC $292,097,319 0.18% 2,428,276
Large Robeco Institutional Asset Management B.V. $279,348,624 0.17% 2,322,293
Large Alyeska Investment Group, L.P. $277,337,496 0.17% 2,305,574
Mega TD Asset Management Inc $275,292,806 0.17% 2,288,576
Large TRUIST FINANCIAL CORP $267,174,314 0.16% 2,221,085
Mega BNP PARIBAS ARBITRAGE, SA $265,387,767 0.16% 2,206,233
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $265,119,881 0.16% 2,204,006
Large SEI INVESTMENTS CO $252,904,431 0.16% 2,102,456
Mid Cullen Capital Management, LLC $249,403,752 0.15% 2,073,354
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM Pension $247,513,395 0.15% 2,057,639
Large Universal- Beteiligungs- und Servicegesellschaft mbH $247,084,561 0.15% 2,054,074
Large NATIONAL BANK OF CANADA /FI/ Bank $235,935,600 0.15% 1,961,390
Large Korea Investment CORP $228,208,293 0.14% 1,897,151
Large Employees Provident Fund Board $227,969,397 0.14% 1,895,165
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $222,005,660 0.14% 1,845,587
Large CAPTRUST FINANCIAL ADVISORS $221,677,388 0.14% 1,842,858
Large Balyasny Asset Management L.P. $218,038,616 0.13% 1,812,608
Mega VAN ECK ASSOCIATES CORP $215,644,484 0.13% 1,792,705
Large Mirae Asset Global Investments Co., Ltd. $215,007,186 0.13% 1,787,407
Large DANSKE BANK A/S Bank $214,017,440 0.13% 1,779,179
Mega CITIGROUP INC $213,286,199 0.13% 1,773,100
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $211,258,948 0.13% 1,756,247
Large Rockefeller Capital Management L.P. $210,856,097 0.13% 1,752,898
Large STOREBRAND ASSET MANAGEMENT AS $210,358,580 0.13% 1,748,762
Large APG Asset Management N.V. $205,469,875 0.13% 1,708,121
Mega DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main Bank $205,115,859 0.13% 1,705,178

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