There is a long list of 1255 institutional holders of Regeneron Pharmaceuticals 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 Regeneron Pharmaceuticals by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-Regeneron Pharmaceuticals table below, the initial column indicates the name of each top institutional holder of Regeneron Pharmaceuticals, with a link to that fund's top holdings. The next columns indicate the amount of Regeneron Pharmaceuticals stock held by each of the institutional holders of Regeneron Pharmaceuticals, followed by the Regeneron Pharmaceuticals 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
FMR LLC	10,317,415	$9,061,682	12/31/2023
REGN	10,317,415	$9,061,682	12/31/2023
Vanguard Group Inc.	8,838,285	$7,762,577	12/31/2023
REGN	8,838,285	$7,762,577	12/31/2023
BlackRock Inc.	8,629,707	$7,579,386	12/31/2023
REGN	8,629,707	$7,579,386	12/31/2023
JPMorgan Chase & Co.		$6,283,875	12/31/2023
REGN	7,226,769	$6,347,200	12/31/2023
Put	114,500	$100,564	12/31/2023
Call	42,400	$37,239	12/31/2023
Capital World Investors	5,130,485	$4,506,071	12/31/2023
REGN	5,130,485	$4,506,071	12/31/2023
State Street Corp	4,901,251	$4,304,720	12/31/2023
REGN	4,901,251	$4,304,720	12/31/2023
Capital International Investors	2,915,972	$2,561,192	12/31/2023
REGN	2,915,972	$2,561,192	12/31/2023
Dodge & Cox	2,367,680	$2,079,510	12/31/2023
REGN	2,367,680	$2,079,510	12/31/2023
Geode Capital Management LLC	2,354,217	$2,062,650	12/31/2023
REGN	2,354,217	$2,062,650	12/31/2023
Loomis Sayles & Co. L P	1,219,067	$1,070,694	12/31/2023
REGN	1,219,067	$1,070,694	12/31/2023
Putnam Investments LLC	1,210,735	$1,063,377	12/31/2023
REGN	1,210,735	$1,063,377	12/31/2023
Morgan Stanley	1,139,519	$1,000,830	12/31/2023
REGN	1,139,519	$1,000,830	12/31/2023
Wellington Management Group LLP	1,102,090	$967,955	12/31/2023
REGN	1,102,090	$967,955	12/31/2023
Norges Bank	1,061,803	$932,571	12/31/2023
REGN	1,061,803	$932,571	12/31/2023
Northern Trust Corp	1,046,408	$919,050	12/31/2023
REGN	1,046,408	$919,050	12/31/2023
Legal & General Group Plc	985,540	$865,590	12/31/2023
REGN	985,540	$865,590	12/31/2023
Bank of New York Mellon Corp	886,544	$853,290	03/31/2024
REGN	886,544	$853,290	03/31/2024
Amundi	914,125	$825,133	12/31/2023
REGN	914,125	$825,133	12/31/2023
American Century Companies Inc.	931,328	$817,977	12/31/2023
REGN	931,328	$817,977	12/31/2023
Bank of America Corp DE		$801,715	12/31/2023
REGN	878,413	$771,501	12/31/2023
Call	63,400	$55,684	12/31/2023
Put	29,000	$25,470	12/31/2023
Invesco Ltd.	765,007	$671,898	12/31/2023
REGN	765,007	$671,898	12/31/2023
Alliancebernstein L.P.	744,217	$653,638	12/31/2023
REGN	744,217	$653,638	12/31/2023
Price T Rowe Associates Inc. MD	718,052	$630,659	12/31/2023
REGN	718,052	$630,659	12/31/2023
UBS Asset Management Americas Inc.	666,381	$585,276	12/31/2023
REGN	666,381	$585,276	12/31/2023
Charles Schwab Investment Management Inc.	620,616	$545,081	12/31/2023
REGN	620,616	$545,081	12/31/2023
Dimensional Fund Advisors LP	593,522	$521,298	12/31/2023
REGN	593,522	$521,298	12/31/2023
Franklin Resources Inc.	484,113	$425,192	12/31/2023
REGN	484,113	$425,192	12/31/2023
Neuberger Berman Group LLC	465,889	$409,222	12/31/2023
REGN	465,889	$409,222	12/31/2023
Nuveen Asset Management LLC	448,469	$393,886	12/31/2023
REGN	448,469	$393,886	12/31/2023
Pictet Asset Management Holding SA	434,400	$381,529	12/31/2023
REGN	434,400	$381,529	12/31/2023
California Public Employees Retirement System	412,507	$362,301	12/31/2023
REGN	412,507	$362,301	12/31/2023
Capital Research Global Investors	406,404	$356,941	12/31/2023
REGN	406,404	$356,941	12/31/2023
Goldman Sachs Group Inc.		$344,102	12/31/2023
REGN	371,785	$326,536	12/31/2023
Call	42,900	$37,679	12/31/2023
Put	22,900	$20,113	12/31/2023
Global Assets Advisory LLC	352,829	$339,594	03/31/2024
REGN	352,829	$339,594	03/31/2024
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	385,220	$338,334	12/31/2023
REGN	385,220	$338,334	12/31/2023
First Trust Advisors LP	365,950	$321,410	12/31/2023
REGN	365,950	$321,410	12/31/2023
Holocene Advisors LP	360,480	$316,606	12/31/2023
REGN	360,480	$316,606	12/31/2023
D. E. Shaw & Co. Inc.		$313,162	12/31/2023
REGN	364,058	$319,749	12/31/2023
Put	7,500	$6,587	12/31/2023
Sumitomo Mitsui Trust Holdings Inc.	319,048	$307,081	03/31/2024
REGN	319,048	$307,081	03/31/2024
The Manufacturers Life Insurance Company	339,660	$298,320	12/31/2023
REGN	339,660	$298,320	12/31/2023
Ameriprise Financial Inc.	335,851	$294,980	12/31/2023
REGN	335,851	$294,980	12/31/2023
Swiss National Bank	333,800	$293,173	12/31/2023
REGN	333,800	$293,173	12/31/2023
Deutsche Bank AG	325,395	$285,791	12/31/2023
REGN	325,395	$285,791	12/31/2023
Barclays PLC	298,237	$261,940	12/31/2023
REGN	298,237	$261,940	12/31/2023
Hsbc Holdings PLC		$259,857	12/31/2023
REGN	325,012	$285,548	12/31/2023
Put	46,100	$40,544	12/31/2023
Call	16,900	$14,853	12/31/2023
Bank of Montreal Can	285,165	$253,346	12/31/2023
REGN	285,165	$253,346	12/31/2023
Royal Bank of Canada	261,791	$229,928	12/31/2023
REGN	261,791	$229,928	12/31/2023
Caisse DE Depot ET Placement DU Quebec	260,166	$228,501	12/31/2023
REGN	260,166	$228,501	12/31/2023
Chevy Chase Trust Holdings Inc.	249,577	$219,201	12/31/2023
REGN	249,577	$219,201	12/31/2023
Renaissance Technologies LLC	243,062	$213,479	12/31/2023
REGN	243,062	$213,479	12/31/2023