There is a long list of 3350 institutional holders of Merck and within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of Merck and by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-Merck and table below, the initial column indicates the name of each top institutional holder of Merck and, with a link to that fund's top holdings. The next columns indicate the amount of Merck and stock held by each of the institutional holders of Merck and, followed by the Merck and position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Vanguard Group Inc.	244,776,747	$26,685,561	12/31/2023
MRK	244,776,747	$26,685,561	12/31/2023
BlackRock Inc.	201,836,434	$22,004,208	12/31/2023
MRK	201,836,434	$22,004,208	12/31/2023
State Street Corp	116,865,977	$12,828,427	12/31/2023
MRK	116,865,977	$12,828,427	12/31/2023
Wellington Management Group LLP	85,595,999	$9,331,676	12/31/2023
MRK	85,595,999	$9,331,676	12/31/2023
Geode Capital Management LLC	55,428,245	$6,028,744	12/31/2023
MRK	55,428,245	$6,028,744	12/31/2023
FMR LLC	42,800,017	$4,666,058	12/31/2023
MRK	42,800,017	$4,666,058	12/31/2023
Morgan Stanley	40,129,825	$4,374,954	12/31/2023
MRK	40,129,825	$4,374,954	12/31/2023
Bank of America Corp DE		$4,094,592	12/31/2023
MRK	37,994,581	$4,142,169	12/31/2023
Put	1,508,600	$164,468	12/31/2023
Call	1,072,200	$116,891	12/31/2023
Charles Schwab Investment Management Inc.	36,682,866	$3,966,029	12/31/2023
MRK	36,682,866	$3,966,029	12/31/2023
Price T Rowe Associates Inc. MD	30,087,217	$3,280,109	12/31/2023
MRK	30,087,217	$3,280,109	12/31/2023
Norges Bank	28,511,888	$3,108,366	12/31/2023
MRK	28,511,888	$3,108,366	12/31/2023
Northern Trust Corp	28,491,644	$3,106,159	12/31/2023
MRK	28,491,644	$3,106,159	12/31/2023
JPMorgan Chase & Co.		$2,696,828	12/31/2023
MRK	25,409,903	$2,770,188	12/31/2023
Put	825,500	$89,996	12/31/2023
Call	152,600	$16,636	12/31/2023
Legal & General Group Plc	23,491,666	$2,561,062	12/31/2023
MRK	23,491,666	$2,561,062	12/31/2023
Deutsche Bank AG	21,573,772	$2,351,973	12/31/2023
MRK	21,573,772	$2,351,973	12/31/2023
Bank of New York Mellon Corp	20,829,926	$2,270,878	12/31/2023
MRK	20,829,926	$2,270,878	12/31/2023
Invesco Ltd.	16,757,610	$1,826,915	12/31/2023
MRK	16,757,610	$1,826,915	12/31/2023
Nuveen Asset Management LLC	16,702,700	$1,821,783	12/31/2023
MRK	16,702,700	$1,821,783	12/31/2023
Ameriprise Financial Inc.	16,413,300	$1,789,582	12/31/2023
MRK	16,413,300	$1,789,582	12/31/2023
Wells Fargo & Company MN		$1,741,771	12/31/2023
MRK	16,262,519	$1,772,940	12/31/2023
Put	286,100	$31,191	12/31/2023
Call	200	$22	12/31/2023
Royal Bank of Canada	14,972,074	$1,632,255	12/31/2023
MRK	14,972,074	$1,632,255	12/31/2023
State Farm Mutual Automobile Insurance Co.	13,794,969	$1,503,928	12/31/2023
MRK	13,794,969	$1,503,928	12/31/2023
Fisher Asset Management LLC	13,551,242	$1,477,357	12/31/2023
MRK	13,551,242	$1,477,357	12/31/2023
Amundi	12,378,435	$1,456,524	12/31/2023
MRK	12,378,435	$1,456,524	12/31/2023
California Public Employees Retirement System	12,988,942	$1,416,054	12/31/2023
MRK	12,988,942	$1,416,054	12/31/2023
UBS Asset Management Americas Inc.	12,669,967	$1,381,280	12/31/2023
MRK	12,669,967	$1,381,280	12/31/2023
UBS Group AG		$1,338,428	12/31/2023
MRK	12,658,556	$1,380,036	12/31/2023
Put	1,256,014	$136,931	12/31/2023
Call	874,359	$95,323	12/31/2023
Goldman Sachs Group Inc.		$1,322,785	12/31/2023
MRK	12,106,223	$1,319,820	12/31/2023
Call	372,600	$40,621	12/31/2023
Put	345,400	$37,656	12/31/2023
Janus Henderson Group PLC	12,056,917	$1,314,473	12/31/2023
MRK	12,056,917	$1,314,473	12/31/2023
DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main	12,050,924	$1,313,741	12/31/2023
MRK	12,050,924	$1,313,741	12/31/2023
Massachusetts Financial Services Co. MA	11,427,241	$1,245,798	12/31/2023
MRK	11,427,241	$1,245,798	12/31/2023
Franklin Resources Inc.	10,114,295	$1,102,660	12/31/2023
MRK	10,114,295	$1,102,660	12/31/2023
Raymond James & Associates	9,587,605	$1,045,241	12/31/2023
MRK	9,587,605	$1,045,241	12/31/2023
Aristotle Capital Management LLC	9,487,338	$1,034,310	12/31/2023
MRK	9,487,338	$1,034,310	12/31/2023
Alliancebernstein L.P.	8,997,337	$980,890	12/31/2023
MRK	8,997,337	$980,890	12/31/2023
The PNC Financial Services Group Inc.	8,793,541	$958,672	12/31/2023
MRK	8,793,541	$958,672	12/31/2023
Putnam Investments LLC	8,456,365	$921,913	12/31/2023
MRK	8,456,365	$921,913	12/31/2023
Capital World Investors	8,326,094	$907,711	12/31/2023
MRK	8,326,094	$907,711	12/31/2023
Nordea Investment Management AB	8,306,168	$905,040	12/31/2023
MRK	8,306,168	$905,040	12/31/2023
Swiss National Bank	7,934,651	$865,036	12/31/2023
MRK	7,934,651	$865,036	12/31/2023
Citadel Advisors LLC		$840,465	12/31/2023
MRK	6,318,171	$688,807	12/31/2023
Call	2,730,700	$297,701	12/31/2023
Put	1,339,600	$146,043	12/31/2023
Bank of Montreal Can	7,558,306	$824,762	12/31/2023
MRK	7,558,306	$824,762	12/31/2023
Schroder Investment Management Group	7,544,810	$822,535	12/31/2023
MRK	7,544,810	$822,535	12/31/2023
LSV Asset Management	7,469,070	$814,278	12/31/2023
MRK	7,469,070	$814,278	12/31/2023
Envestnet Asset Management Inc.	7,158,625	$780,433	12/31/2023
MRK	7,158,625	$780,433	12/31/2023
Clearbridge Investments LLC	7,134,389	$777,791	12/31/2023
MRK	7,134,389	$777,791	12/31/2023
Stifel Financial Corp	6,797,451	$741,063	12/31/2023
MRK	6,797,451	$741,063	12/31/2023
Sumitomo Mitsui Trust Holdings Inc.	6,774,195	$738,523	12/31/2023
MRK	6,774,195	$738,523	12/31/2023
Hsbc Holdings PLC		$730,520	12/31/2023
MRK	6,676,276	$727,709	12/31/2023
Call	25,800	$2,811	12/31/2023
Barrow Hanley Mewhinney & Strauss LLC	6,539,647	$712,952	12/31/2023
MRK	6,539,647	$712,952	12/31/2023