Regeneron Pharmaceuticals, Inc. REGN NASDAQ

NASDAQ Global Select • Healthcare • Biotechnology • US • USD

SharesGrow Score

83/100

6/7 Pass

SharesGrow Intrinsic Value

Regeneron Pharmaceuticals, Inc. (REGN) has 20 known insider and institutional holders on record. The largest holder is YANCOPOULOS GEORGE with 310,460 shares. Other notable holders include SCHLEIFER LEONARD S and VAGELOS P ROY.

Over the last 12 months, insiders have made 24 transactions in REGN stock — 11 buys (valued at $6.06M) and 4 sells (valued at $1.25M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

REGN Insider Ownership

Top Holder

YANCOPOULOS GEORGE

310,460 shares

Buys (12 mo)

$6.06M value

Sells (12 mo)

$1.25M value

12-Month Transaction Activity

Buy 46%

Sell 17%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Yancopoulos George	Bd. Co-chair, President & CSO	310,460	2026-01-05	100%
2	Schleifer Leonard S	Bd. Co-chair, President & CEO	214,523	2026-01-05	69%
3	Vagelos P Roy	Director	125,493	2023-04-05	40%
4	Stahl Neil	EVP Research and Development	48,829	2024-12-18	16%
5	Murphy Andrew J	EVP Research	47,833	2025-12-11	15%
6	Larosa Joseph J	EVP General Counsel and Secret	30,075	2024-12-18	10%
7	Van Plew Daniel P	EVP & General Mgr, Industrial	21,673	2025-12-11	7%
8	Ryan Arthur F	Director	17,603	2026-04-03	6%
9	Fenimore Christopher R.	SVP Finance & CFO	16,265	2024-12-18	5%
10	Mccourt Marion	EVP Commercial	14,349	2025-12-11	5%
11	Landry Robert E	EVP Finance CFO	11,787	2024-02-06	4%
12	Poon Christine A	Director	1,962	2026-01-06	1%
13	Sing George L	Director	1,962	2026-01-06	1%
14	Goldstein Joseph L	Director	1,962	2026-01-06	1%
15	Tessier-lavigne Marc	Director	1,929	2023-01-05	1%
16	Coles N Anthony	Director	1,714	2026-01-06	1%
17	Bassler Bonnie L	Director	1,703	2026-01-08	1%
18	Brown Michael S	Director	1,703	2026-01-06	1%
19	Pitofsky Jason	SVP Controller	905	2026-02-11	0%
20	Zoghbi Huda Y	Director	800	2026-02-23	0%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-04-01	Ryan Arthur F	Director	Informative Sell	40	$779.71	$31.19K
2026-03-02	Ryan Arthur F	Director	Informative Sell	20	$789.28	$15.79K
2026-02-19	Zoghbi Huda Y	Director	Option Exercise (Sell)	1,638	$376.69	$617.02K
2026-02-09	Pitofsky Jason	SVP Controller	Option Exercise (Sell)	1,000	$492.00	$492K
2026-02-09	Ryan Arthur F	Director	Informative Sell	1	$787.82	$787.82
2026-01-07	Bassler Bonnie L	Director	Informative Sell	1,500	$800.00	$1.2M
2026-01-02	Guarini Kathryn	Director	RSU Award	155	-	-
2026-01-02	Bassler Bonnie L	Director	RSU Award	155	-	-
2026-01-02	Zoghbi Huda Y	Director	RSU Award	155	-	-
2026-01-02	Schenkein David P	Director	RSU Award	155	-	-
2026-01-02	Thompson Craig B.	Director	RSU Award	155	-	-
2026-01-02	Goldstein Joseph L	Director	RSU Award	1,962	$772.76	$1.52M
2026-01-02	Sing George L	Director	RSU Award	1,962	$772.76	$1.52M
2026-01-02	Coles N Anthony	Director	RSU Award	155	-	-
2026-01-02	Poon Christine A	Director	RSU Award	1,962	$772.76	$1.52M
2026-01-02	Ryan Arthur F	Director	RSU Award	1,962	$772.76	$1.52M
2026-01-02	Brown Michael S	Director	RSU Award	155	-	-
2025-12-31	Yancopoulos George	Bd. Co-chair, President & CSO	Tax Withholding of RSU	28,570	$772.09	$22.06M
2025-12-31	Schleifer Leonard S	Bd. Co-chair, President & CEO	Tax Withholding of RSU	28,570	$772.09	$22.06M
2025-12-30	Sing George L	Director	Option Exercise (Sell)	9,212	$520.01	$4.79M
2025-12-09	Murphy Andrew J	EVP Research	Tax Withholding of RSU	4,229	$701.51	$2.97M
2025-12-09	Mccourt Marion	EVP Commercial	Tax Withholding of RSU	1,021	$701.51	$716.24K
2025-12-09	Van Plew Daniel P	EVP & General Mgr, Industrial	Tax Withholding of RSU	2,552	$701.51	$1.79M
2025-12-09	Yancopoulos George	Bd. Co-chair, President & CSO	Tax Withholding of RSU	131,874	$701.51	$92.51M