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Disclosery

MRK MERCK & CO INC

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COM (common), issuer CIK 310158

3,739 managers (3,806 13F filers) reported a position in MRK shares at 2026-03-31, 1,931,430,885 shares in all. 256 filers opened a position and 123 filers sold out during the quarter.

Managers
3,739
13F filers
3,806
New
256
Added
1,467
Reduced
1,591
Sold out
123
Shares held by filers
1,931,430,885

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.827,246$99.6M0.15%+18,68013F-HRTimelineGroup
Lansforsakringar Fondforvaltning AB (pu…804,827$96.8M0.51%-63,10213F-HRTimeline
Calamos Advisors LLCgroup of 2 filers holding798,475$96M+59,379Timeline
Cannell & Spears LLC798,223$96M1.88%+452,28313F-HR/ATimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC794,868$95.6M0.76%+21,15013F-HRTimelineGroup
Man Group plcin group Man Group plc793,167$95.4M0.2%-1,050,36113F-HRTimelineGroup
Compagnie Lombard Odier SCmA792,577$95.3M1.17%-35,09913F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV785,937$94.5M0.14%+10,72713F-HRTimeline
Sarasin & Partners LLPin group Sarasin & Partners LLP785,691$94.5M1.15%-129,50313F-HRTimelineGroup
DONALDSON CAPITAL MANAGEMENT, LLC785,160$94.4M3.06%+7,19913F-HRTimeline
Munich Reinsurance Co Stock Corp in Mun…752,637$90.5M2.23%-237,28113F-HRTimeline
Bahl & Gaynor LLC750,494$90.3M0.46%-14,34513F-HRTimeline
Midwest Trust Co747,618$89.9M1.12%-19,35313F-HRTimeline
PBU - The Pension Fund of Early Childho…744,629$89.6M1.35%-31,33713F-HR/ATimeline
First Financial Bankshares Inc743,601$89.4M1.81%+15,08213F-HRTimeline
Assenagon Asset Management S.A.743,214$89.4M0.14%+201,64213F-HRTimeline
CIBC Asset Management Inc742,928$89.4M0.22%+22,21013F-HRTimeline
Pacer Advisors, Inc.732,981$88.2M0.25%-3,618,41613F-HR/ATimeline
SAMLYN CAPITAL, LLCin group SAMLYN CAPITAL, LLC726,481$87.4M1.5%new13F-HRTimelineGroup
STATE OF MICHIGAN RETIREMENT SYSTEM723,090$87M0.46%-1,40013F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al718,238$86.4M0.64%-638,10013F-HRTimeline
OLD REPUBLIC INTERNATIONAL CORP705,600$84.9M3.37%013F-HRTimeline
Epoch Investment Partners, Inc.701,092$84.3M0.51%-9,35913F-HRTimeline
NISA INVESTMENT ADVISORS, LLC693,541$84M0.31%-17,57813F-HRTimeline
SUMITOMO MITSUI FINANCIAL GROUP, INC.group of 2 filers holding693,506$83.4M-29,543Timeline
ARIZONA STATE RETIREMENT SYSTEM679,746$81.8M0.48%-22,53613F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding676,257$81.3M+8,910Timeline
Czech National Bank675,968$81.3M0.53%+21,49613F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …672,535$81.3M0.14%-229,77113F-HRTimelineGroup
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC663,400$79.8M1.74%new13F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS659,877$79.4M0.33%-118,09013F-HRTimeline
FORT WASHINGTON INVESTMENT ADVISORS INC…659,851$79.4M0.44%+31,08313F-HRTimeline
CACTI ASSET MANAGEMENT LLC645,299$77.6M4.7%+44613F-HRTimeline
ING GROEP NV641,709$77.2M0.47%-144,78913F-HRTimeline
Clark Capital Management Group, Inc.640,272$77M0.48%+622,45413F-HRTimeline
CREDIT AGRICOLE S Ain group CREDIT AGRICOLE S A637,765$76.7M0.25%-559,65113F-HRTimelineGroup
Harvest Portfolios Group Inc.626,802$75.4M1.24%-43,35913F-HRTimeline
1832 Asset Management L.P.616,840$74.2M0.1%-554,79613F-HRTimeline
Kestra Advisory Services, LLCgroup of 3 filers holding616,751$74.2M+48,445Timeline
WESTWOOD HOLDINGS GROUP INCin group WESTWOOD HOLDINGS GROUP INC608,628$73.2M0.53%+8,63313F-HRTimelineGroup
FIL Ltdin group FIL Ltd597,352$71.9M0.06%-58,74213F-HRTimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC596,468$71.7M0.36%+127,08013F-HRTimeline
Perpetual Ltdin group Perpetual Ltd594,443$71.5M1.1%+30,72713F-HRTimelineGroup
COMPASS CAPITAL MANAGEMENT, INC589,768$70.9M4.29%-92,25913F-HRTimeline
WHITTIER TRUST CO585,422$70.7M0.8%+27,43913F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…580,004$69.8M0.36%-15,61213F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…578,169$69.5M0.35%+83713F-HRTimeline
AustralianSuper Pty Ltd575,397$69.2M0.36%-72,85413F-HRTimeline
D.A. DAVIDSON & CO.572,593$68.9M0.42%-4,36613F-HRTimeline
Holocene Advisors, LP572,467$68.9M0.17%-313,29313F-HRTimeline
Federation des caisses Desjardins du Qu…570,879$68.7M0.25%+87,49413F-HRTimeline
PEAPACK GLADSTONE FINANCIAL CORP564,709$67.9M0.87%-3,26613F-HRTimeline
Douglas Lane & Associates, LLC561,892$67.6M0.97%-3,93713F-HRTimeline
OFI INVEST ASSET MANAGEMENT630,057$65.9M0.87%-75,82813F-HRTimeline
KORNITZER CAPITAL MANAGEMENT INC /KS544,161$65.5M1.41%-8,79813F-HRTimeline
ROCKLAND TRUST CO534,963$64.4M2.58%-42,46713F-HRTimeline
Retirement Systems of Alabama527,079$63.4M0.21%-93513F-HRTimeline
ProShare Advisors LLC525,295$63.2M0.09%-103,58013F-HRTimeline
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…522,959$62.9M0.55%-1,65613F-HRTimeline
IFM Investors Pty Ltd522,579$62.9M0.52%+12,75013F-HRTimeline
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA521,378$62.7M0.31%-2,99313F-HRTimelineGroup
Radnor Capital Management, LLC519,443$62.5M9.25%-11513F-HRTimeline
RNC CAPITAL MANAGEMENT LLC514,340$61.9M2.71%+8,72913F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.513,752$61.8M0.18%+21,30113F-HRTimelineGroup
BANQUE PICTET & CIE SA513,131$61.7M0.72%-43,93113F-HRTimeline
Empowered Funds, LLC507,815$61.1M0.39%-178,38213F-HR/ATimeline
&PARTNERS506,594$61M0.3%+2,69413F-HRTimeline
Gotham Asset Management, LLC506,551$60.9M0.19%+59,12413F-HRTimeline
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…group of 2 filers holding506,529$60.9M+10,737Timeline
Mediolanum International Funds Ltd513,788$60.7M0.64%-402,06113F-HRTimeline
Florida Trust Wealth Management Co503,081$60.5M1.69%-7,93913F-HRTimeline
United Super Pty Ltd in its capacity as…499,805$60.1M1.13%-159,10013F-HRTimeline
QRG CAPITAL MANAGEMENT, INC.499,732$60.1M0.62%+79,82313F-HRTimeline
Illinois Municipal Retirement Fund487,434$58.6M0.75%-59,29613F-HRTimeline
PINNACLE ASSOCIATES LTD485,756$58.4M0.75%+39,49613F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC480,635$57.8M0.23%+11,05513F-HRTimelineGroup
XPONANCE LLC473,091$56.9M0.4%+59,88013F-HRTimeline
SRB CORPin group SRB CORP463,298$55.7M3.42%-10,06713F-HRTimelineGroup
AMALGAMATED BANK458,630$55.2M0.42%-5,48613F-HRTimeline
B. Metzler seel. Sohn & Co. AGin group B. Metzler seel. Sohn & Co. AG454,985$54.7M0.51%-10,82713F-HRTimelineGroup
FUKOKU MUTUAL LIFE INSURANCE Co447,246$53.8M3.52%013F-HRTimeline
Distillate Capital Partners LLC446,915$53.8M2.83%+2,48913F-HRTimeline
NICHOLS & PRATT ADVISERS LLP /MAin group NICHOLS & PRATT ADVISERS LLP …446,639$53.7M3.47%-4,98213F-HRTimelineGroup
TOCQUEVILLE ASSET MANAGEMENT L.P.in group TOCQUEVILLE ASSET MANAGEMENT …446,512$53.7M0.8%-45,69913F-HRTimelineGroup
Curi Capital, LLC443,638$53.7M0.96%+41613F-HRTimeline
GATEWAY INVESTMENT ADVISERS LLC443,847$53.4M0.6%-93,22113F-HRTimeline
USS Investment Management Ltd434,031$52.2M0.2%+10,99413F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC427,760$51.5M0.24%-37,35413F-HRTimelineGroup
CORDA Investment Management, LLC.427,526$51.4M3.56%-9,54813F-HRTimeline
S&CO INC425,528$51.2M3.18%-313F-HRTimeline
Integral Health Asset Management, LLC425,000$51.1M2.71%+175,00013F-HRTimeline
VAUGHAN DAVID INVESTMENTS LLC/IL414,509$49.9M1.05%+51413F-HRTimeline
NewEdge Advisors, LLC413,565$49.7M0.18%+17,13413F-HR/ATimeline
Cambridge Investment Research Advisors,…411,342$49.5M0.13%-10,58813F-HRTimeline
Systematic Alpha Investments, LLC410,682$49.4M1.74%013F-HRTimeline
PensionDanmark Pensionsforsikringsaktie…408,667$49.2M0.48%-27,38513F-HRTimeline
BANCO BILBAO VIZCAYA ARGENTARIA, S.A.407,269$49M0.34%-63,22913F-HRTimeline
Varma Mutual Pension Insurance Co406,874$48.9M0.29%+10,00013F-HR/ATimeline
Fiduciary Trust Coin group Fiduciary Trust Co406,382$48.9M0.58%-17,51413F-HRTimelineGroup
Sanctuary Advisors, LLC406,087$48.8M0.26%+48,57913F-HRTimeline
Raiffeisen Bank International AGin group Raiffeisen Bank International…413,033$48.8M0.7%-7,28513F-HRTimelineGroup
Utah Retirement Systems404,056$48.6M0.5%-12,24113F-HRTimeline
Public Sector Pension Investment Board401,889$48.3M0.15%+79,30713F-HRTimeline
TD Waterhouse Canada Inc.397,990$48M0.14%+115,08013F-HRTimeline
Vontobel Holding Ltd.in group Vontobel Holding Ltd.387,524$46.6M0.16%-45,37913F-HRTimelineGroup
FERGUSON WELLMAN CAPITAL MANAGEMENT, INC385,956$46.4M0.63%-374,69413F-HRTimeline
Erste Asset Management GmbHin group Erste Asset Management GmbH390,856$46.3M0.43%+19,88513F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK382,962$46.1M0.25%+126,61113F-HRTimelineGroup
Police & Firemen's Retirement System of…382,636$46M0.39%-3,71713F-HRTimeline
MEYER HANDELMAN CO380,705$45.8M1.42%+2,41813F-HRTimeline
MML INVESTORS SERVICES, LLC380,197$45.7M0.13%-32,57013F-HRTimeline
Glenview Trust Co376,892$45.3M0.71%+9,61613F-HRTimeline
AIA Group Ltdin group AIA Group Ltd375,724$45.2M0.66%-6,57013F-HRTimelineGroup
Capital Investment Advisors, LLC369,782$44.5M0.65%+6,97113F-HR/ATimeline
SMITH CHAS P & ASSOCIATES PA CPASin group SMITH CHAS P & ASSOCIATES PA …367,523$44.2M2.4%-3,41313F-HRTimelineGroup
Beacon Pointe Advisors, LLC367,061$44.2M0.23%+76,66113F-HRTimeline
Ilmarinen Mutual Pension Insurance Co366,500$44.1M0.35%-75,00013F-HRTimeline
Andra AP-fonden364,485$43.8M0.52%-63,61513F-HRTimeline
NEOS Investment Management LLC364,439$43.8M0.22%-45,11113F-HRTimeline
EDMOND DE ROTHSCHILD HOLDING S.A.in group EDMOND DE ROTHSCHILD HOLDING …364,118$43.8M0.63%-60,29813F-HRTimelineGroup
Rakuten Group, Inc.group of 2 filers holding368,783$43.6M+40,289Timeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.361,688$43.5M0.53%-139,24013F-HRTimelineGroup
FARALLON CAPITAL MANAGEMENT, L.L.C.361,000$43.4M0.26%new13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Saudi Central Bank359,011$43.2M0.91%+90,58113F-HRTimeline
LETKO, BROSSEAU & ASSOCIATES INC358,019$43.1M0.69%-12,51513F-HRTimeline
GAMCO Investors (Gabelli)group of 3 filers holding355,949$42.8M-15,789Timeline
Northwest & Ethical Investments L.P.351,729$42.3M0.98%+23,08113F-HRTimeline
WATERS PARKERSON & CO., LLC351,577$42.3M2.17%-14613F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC351,131$42.2M0.05%+223,44413F-HRTimelineGroup
Advisors Asset Management, Inc.349,476$42M0.7%+6,78713F-HRTimeline
New York Life Investment Management LLCin group New York Life Investment Mana…344,750$41.5M0.35%+4,46213F-HRTimelineGroup
BRITISH COLUMBIA INVESTMENT MANAGEMENT …342,084$41.1M0.24%-101,14213F-HRTimeline
LORING WOLCOTT & COOLIDGE FIDUCIARY ADV…337,029$40.9M0.41%-7,97913F-HRTimeline
MAI Capital Management335,023$40.3M0.23%+11,53213F-HRTimeline
CONNING INC.in group CONNING INC.333,031$40.1M1.33%-19,94613F-HRTimelineGroup
HERITAGE INVESTORS MANAGEMENT CORP332,467$40M1.21%+59513F-HRTimeline
PRUDENTIAL PLCin group PRUDENTIAL PLC332,437$40M0.23%-48,03913F-HRTimelineGroup
Lido Advisors, LLCin group Lido Advisors, LLC330,201$39.9M0.16%-29,27213F-HRTimelineGroup
NISSAY ASSET MANAGEMENT CORP /JAPAN329,632$39.7M0.21%-3,20313F-HRTimeline
Ethic Inc.326,297$39.3M0.61%+8,15213F-HRTimeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC321,001$38.7M0.17%+276,75013F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…320,946$38.6M0.15%-61113F-HRTimeline
Pinnacle Financial Partners, Inc.in group Pinnacle Financial Partners, …320,321$38.5M0.29%-5,51213F-HRTimelineGroup
NORRIS PERNE & FRENCH LLP/MI318,845$38.4M1.87%+66,68313F-HRTimeline
Welch & Forbes LLC317,368$38.2M0.49%-4,86113F-HRTimeline
Willis Investment Counsel313,718$37.7M2.06%013F-HRTimeline
Migdal Insurance & Financial Holdings L…in group Migdal Insurance & Financial …310,002$37.6M0.33%new13F-HRTimelineGroup
State of Alaska, Department of Revenue311,685$37.5M0.41%+51013F-HRTimeline
Wealthfront Advisers LLC311,279$37.4M0.08%+54,03513F-HRTimeline
Private Wealth Partners, LLC309,338$37.2M2.87%-2,44913F-HRTimeline
Howard Capital Management Group, LLC308,798$37.1M2.47%+5,76613F-HRTimeline
Steward Partners Investment Advisory, L…305,398$36.7M0.19%+5,45613F-HRTimeline
Arax Advisory Partners303,856$36.5M1.03%+9,92713F-HRTimeline
ATALANTA SOSNOFF CAPITAL, LLCin group ATALANTA SOSNOFF CAPITAL, LLC302,127$36.3M0.78%+175,16713F-HRTimelineGroup
Cullen/Frost Bankers, Inc.in group Cullen/Frost Bankers, Inc.300,942$36.2M0.41%+84,94513F-HRTimelineGroup
ADAMS DIVERSIFIED EQUITY FUND, INC.in group ADAMS DIVERSIFIED EQUITY FUND…300,200$36.1M1.27%-8,60013F-HRTimelineGroup
M&G PLCin group M&G PLC298,044$35.8M0.18%-73,22313F-HRTimelineGroup
Sequoia Financial Advisors, LLC297,046$35.7M0.2%-9,09713F-HRTimeline
HANCOCK WHITNEY CORP299,230$35.7M0.62%-8,07013F-HRTimeline
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…271,829$35.6M0.01%-4,144,19213F-HRTimelineGroup
TEACHERS RETIREMENT SYSTEM OF THE STATE…295,607$35.6M0.28%+23,71913F-HRTimeline
MARTINGALE ASSET MANAGEMENT L P294,925$35.5M0.89%-28,87413F-HRTimeline
FIDEURAM - INTESA SANPAOLO PRIVATE BANK…293,491$35.3M1.24%+96,63713F-HRTimeline
Quintet Private Bank (Europe) S.A.293,071$35.3M2.36%-6,07313F-HRTimeline
Douglass Winthrop Advisors, LLC292,328$35.2M0.64%-15,00213F-HRTimeline
Avanza Fonder AB285,007$34.3M0.95%-4,71313F-HRTimeline
BRADLEY FOSTER & SARGENT INC/CT284,705$34.2M0.53%-4,27913F-HR/ATimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND284,228$34.2M0.45%013F-HRTimeline
Generali Asset Management SPA SGR284,084$34.2M0.71%-24,08913F-HRTimeline
WESBANCO BANK INC282,430$34M0.94%-6,97013F-HRTimeline
Stratos Wealth Partners, LTD.group of 3 filers holding282,171$33.9M-74,097Timeline
WHITTIER TRUST CO OF NEVADA INC280,055$33.8M0.69%+18,72313F-HRTimeline
FACTORY MUTUAL INSURANCE CO281,024$33.8M0.38%+3,65013F-HRTimeline
ASR Vermogensbeheer N.V.278,937$33.6M0.39%+5,05913F-HRTimeline
Horizon Investments, LLC277,662$33.4M0.37%+18,62513F-HRTimeline
Haverford Trust Co277,400$33.4M0.31%-2,23513F-HRTimeline
STEPHENS INC /AR/in group Stephens Investment Managemen…272,906$33.2M0.42%-69,23413F-HRTimelineGroup
THOMPSON SIEGEL & WALMSLEY LLC274,701$33M0.58%-27,18113F-HRTimeline
Private Advisor Group, LLC273,347$32.9M0.15%-11,78313F-HRTimeline
BECKER CAPITAL MANAGEMENT INC271,104$32.8M0.97%-14,35113F-HRTimeline
CapWealth Advisors, LLC271,272$32.6M2.42%-57,04313F-HRTimeline
CITIZENS FINANCIAL GROUP INC/RIin group CITIZENS FINANCIAL GROUP INC/…269,662$32.6M0.45%-6,53213F-HRTimelineGroup
Daiichi Life Insurance Co., Ltd.in group Daiichi Life Insurance Co., L…270,465$32.5M0.93%+41,64813F-HRTimelineGroup
DAVENPORT & Co LLC269,725$32.4M0.18%+8,73813F-HRTimeline
PINEBRIDGE INVESTMENTS LLC266,126$32M0.27%-71,35713F-HRTimeline
Americana Partners, LLC266,031$32M0.83%+45,62613F-HRTimeline
Cresset Asset Management, LLC263,545$31.9M0.14%+17,39713F-HRTimeline
EVERGREEN CAPITAL MANAGEMENT LLC262,297$31.8M0.69%+6,20513F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…263,514$31.7M0.36%-2,53613F-HRTimelineGroup
Allworth Financial LP262,901$31.6M0.13%+50,97013F-HRTimeline
TRANSCEND CAPITAL ADVISORS, LLC262,384$31.6M2.53%+1,01313F-HRTimeline
SECTOR GAMMA AS260,340$31.3M7.39%-103,31113F-HRTimeline
Waverly Advisors, LLC258,634$31.1M0.23%+2,03013F-HRTimeline
SILVERCREST ASSET MANAGEMENT GROUP LLC257,228$30.9M0.22%-2,16913F-HRTimeline
OP Asset Management Ltd256,793$30.9M0.32%-20,77513F-HR/ATimeline
ALLSTATE CORPin group ALLSTATE CORP256,773$30.9M0.33%+67,81413F-HRTimelineGroup
SHELTON CAPITAL MANAGEMENT255,813$30.8M0.67%-23,87313F-HRTimeline
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…254,138$30.6M0.33%+20,65813F-HRTimelineGroup
Vinva Investment Management Ltd256,254$30.3M0.38%-69,69013F-HRTimeline
ARGA Investment Management, LP251,458$30.2M0.99%-45,95113F-HRTimeline