CITIGROUP INC

Position in REGN — Regeneron Pharmaceuticals, Inc.

CIK 831001 NEW YORK, NY

Back to REGN Full portfolio

Position in REGN

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$142,699,654

-$46,667,070 QoQ

Shares Held

184,691

-24.7% QoQ

Ownership

0.176%

of shares outstanding

% of Portfolio

0.11%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in REGN Over Time

Shares Held

Position Value (USD)

Derivatives in REGN

reported options exposure · as of Dec 31, 2025

CallValue

CallShares

PutValue

$20,994,864

PutShares

27,200

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Mar 31, 2026

CITIGROUP INC holds $1,427,021,861 across 401 Biotechnology names. REGN ranks #2 (10.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VRTX	Vertex Pharmaceuticals Inc / Ma	682,807	$304,900,636
2	REGN	Regeneron Pharmaceuticals, Inc. This page	184,691	$142,699,654
3	ALNY	Alnylam Pharmaceuticals, Inc.	263,375	$87,142,884
4	MRNA	Moderna, Inc.	1,480,034	$75,185,727
5	FOLD	AMICUS THERAPEUTICS, INC.	4,226,882	$61,120,713
6	BBIO	BridgeBio Pharma, Inc.	746,483	$55,433,827
7	INCY	Incyte Corp	489,649	$46,085,763
8	ROIV	Roivant Sciences Ltd.	1,536,110	$42,550,246

All Filings in REGN

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50 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$142,699,654	184,691	-24.7%	Shares	Defined	2026-05-11
2025-12-31	$189,366,724	245,335	+802.0%	Shares	Defined	2026-02-13
2025-12-31	$20,994,864	27,200	-80.3%	Put	Defined	2026-02-13
2025-09-30	$77,700,651	138,191	-25.0%	Shares	Defined	2025-11-10
2025-06-30	$96,729,150	184,246	+10135.9%	Shares	Defined	2025-08-11
2025-03-31	$1,141,614	1,800	-99.0%	Call	Defined	2025-05-12
2025-03-31	$117,695,327	185,572	+5202.1%	Shares	Defined	2025-05-12
2025-03-31	$2,219,805	3,500	-91.4%	Put	Defined	2025-05-12
2024-12-31	$28,920,598	40,600	-70.2%	Call	Defined	2025-02-12
2024-12-31	$97,193,152	136,444	+221.0%	Shares	Defined	2025-02-12
2024-12-31	$30,274,025	42,500	-72.6%	Put	Defined	2025-02-12
2024-09-30	$162,898,044	154,958	+261.2%	Shares	Defined	2024-11-12
2024-09-30	$45,098,196	42,900	+4.6%	Put	Defined	2024-11-12
2024-09-30	$43,100,840	41,000	+1.0%	Call	Defined	2024-11-12
2024-06-30	$42,671,818	40,600	-4.5%	Call	Defined	2024-08-12
2024-06-30	$44,668,775	42,500	-71.3%	Put	Defined	2024-08-12
2024-06-30	$155,592,375	148,038	+256.7%	Shares	Defined	2024-08-12
2024-03-31	$39,943,335	41,500	-73.1%	Put	Defined	2024-05-10
2024-03-31	$148,408,255	154,192	+321.3%	Shares	Defined	2024-05-10
2024-03-31	$35,227,134	36,600	+2.2%	Call	Defined	2024-05-10
2023-12-31	$31,442,782	35,800	-54.2%	Call	Defined	2024-02-09
2023-12-31	$68,594,449	78,100	-33.1%	Put	Defined	2024-02-09
2023-12-31	$102,602,712	116,821	-5.2%	Shares	Defined	2024-02-09
2023-09-30	$101,388,672	123,200	+9.1%	Call	Defined	2023-12-06
2023-09-30	$92,912,184	112,900	-21.9%	Put	Defined	2023-12-06
2023-09-30	$118,906,195	144,486	-0.6%	Shares	Defined	2023-12-06
2023-06-30	$104,400,985	145,296	+178.3%	Shares	Defined	2023-08-10
2023-06-30	$37,507,788	52,200	+71.7%	Put	Defined	2023-08-10
2023-06-30	$21,843,616	30,400	+65.2%	Call	Defined	2023-08-10
2023-03-31	$15,118,728	18,400	-80.7%	Call	Defined	2023-05-11
2023-03-31	$78,324,046	95,323	+246.6%	Shares	Defined	2023-05-11
2023-03-31	$22,595,925	27,500	-76.4%	Put	Defined	2023-05-11
2022-12-31	$84,241,170	116,760	+734.0%	Shares	Defined	2023-02-09
2022-12-31	$10,100,860	14,000	+300.0%	Put	Defined	2023-02-09
2022-12-31	$2,525,215	3,500	-74.1%	Call	Defined	2023-02-09
2022-09-30	$9,299,745	13,500	-43.8%	Call	Defined	2022-11-10
2022-09-30	$16,532,880	24,000	-78.1%	Put	Defined	2022-11-10
2022-09-30	$75,341,020	109,369	-0.7%	Shares	Defined	2022-11-10
2022-06-30	$65,092,868	110,116	+3046.2%	Shares	Defined	2022-08-10
2022-06-30	$2,068,955	3,500	-75.0%	Call	Defined	2022-08-10
2022-06-30	$8,275,820	14,000	0.0%	Put	Defined	2022-08-10
2022-03-31	$9,777,880	14,000	+300.0%	Put	Defined	2022-05-12
2022-03-31	$2,444,470	3,500	-97.1%	Call	Defined	2022-05-12
2022-03-31	$83,580,616	119,671	+872.9%	Shares	Defined	2022-05-12
2021-12-31	$7,767,696	12,300	-91.2%	Call	Defined	2022-02-10
2021-12-31	$88,069,882	139,457	+244.3%	Shares	Defined	2022-02-10
2021-12-31	$25,576,560	40,500	-64.2%	Put	Defined	2022-02-10
2021-09-30	$68,422,857	113,062	+179.2%	Shares	Defined	2021-11-10
2021-09-30	$24,509,790	40,500	+31.5%	Put	Defined	2021-11-10
2021-09-30	$18,639,544	30,800	—	Call	Defined	2021-11-10
No filing history on record for this holder in this stock.