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REGN Regeneron Pharmaceuticals Inc

Insider figures are trailing 90 days, open-market Form 4 only. Institutional figures are the latest reported quarter. These windows are not simultaneous.

-$41.8M net selling - trailing 90 days

0 buyers - 10 unique sellers

Historical context: most recent complete month (2026-10) is the 2nd percentile of this ticker's monthly net P/S flow over 25 complete months. Lower percentiles are more selling; higher are more buying. P10–P90: -$2.7M to $0.

8 accumulating - 6 trimming - 0 unchanged

14 comparable institutions - Q2 2026

open-market Form 4 only - grants, exercises, tax withholding excluded. ~ derived from SEC-reported shares x price.

Who is responsible

Insider	Role	Net activity	Rows
SING GEORGE L	—	-~$20.4M	9
POON CHRISTINE A	—	-~$7.6M	6
LAROSA JOSEPH J	EVP General Counsel and Secret	-~$4.3M	2
MURPHY ANDREW J	Co-Chief Scientific Officer	-~$3.2M	27
McCourt Marion	EVP Commercial	-~$2.0M	2
BROWN MICHAEL S	—	-~$1.7M	1
McCourt Marion	EVP Commercial	-~$1.0M	1
Guarini Kathryn	—	-~$0.7M	2
Zoghbi Huda Y	—	-~$0.6M	1
Guarini Kathryn	—	-~$0.4M	1

Transactions

Date	Insider	Role	Type	Shares	Price	Value
November 2, 2026	SING GEORGE L	—	9 reported sale rows	21129	—	~$20.4M
November 2, 2026	SING GEORGE L	—	S	-1040	967.07	~$1.0M
November 2, 2026	SING GEORGE L	—	S	-200	970.18	~$0.2M
November 2, 2026	SING GEORGE L	—	S	-1522	966.27	~$1.5M
November 2, 2026	SING GEORGE L	—	S	-1224	960.57	~$1.2M
November 2, 2026	SING GEORGE L	—	S	-540	961.85	~$0.5M
November 2, 2026	SING GEORGE L	—	S	-2522	962.61	~$2.4M
November 2, 2026	SING GEORGE L	—	S	-4338	963.47	~$4.2M
November 2, 2026	SING GEORGE L	—	S	-2670	964.57	~$2.6M
November 2, 2026	SING GEORGE L	—	S	-7073	965.38	~$6.8M
November 2, 2026	POON CHRISTINE A	—	6 reported sale rows	7830	—	~$7.6M
November 2, 2026	POON CHRISTINE A	—	S	-218	966.74	~$0.2M
November 2, 2026	POON CHRISTINE A	—	S	-201	971.31	~$0.2M
November 2, 2026	POON CHRISTINE A	—	S	-937	970.51	~$0.9M
November 2, 2026	POON CHRISTINE A	—	S	-3203	969.5	~$3.1M
November 2, 2026	POON CHRISTINE A	—	S	-2499	968.58	~$2.4M
November 2, 2026	POON CHRISTINE A	—	S	-772	967.38	~$0.7M
November 2, 2026	LAROSA JOSEPH J	EVP General Counsel and Secret	2 reported sale rows	4466	—	~$4.3M
November 2, 2026	LAROSA JOSEPH J	EVP General Counsel and Secret	S	-527	966.11	~$0.5M
November 2, 2026	LAROSA JOSEPH J	EVP General Counsel and Secret	S	-3939	965.41	~$3.8M
October 30, 2026	BROWN MICHAEL S	—	S	-1929	875	~$1.7M
October 30, 2026	McCourt Marion	EVP Commercial	S	-1132	869.43	~$1.0M
October 30, 2026	Guarini Kathryn	—	S	-400	900	~$0.4M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	27 reported sale rows	4147	—	~$3.2M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-50	781.47	~$39K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-279	766.47	~$0.2M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-192	767.39	~$0.1M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-105	768.33	~$81K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-127	769.3	~$98K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-12	770.2	~$9K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-283	771.56	~$0.2M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-211	772.56	~$0.2M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-224	773.4	~$0.2M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-121	774.48	~$94K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-376	775.46	~$0.3M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-66	776.31	~$51K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-38	777.76	~$30K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-454	778.64	~$0.4M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-380	779.59	~$0.3M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-463	780.63	~$0.4M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-6	753.76	~$5K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-35	755.91	~$26K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-16	757.68	~$12K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-24	758.16	~$18K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-14	759.96	~$11K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-74	760.65	~$56K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-27	761.36	~$21K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-55	762.57	~$42K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-25	763.76	~$19K
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-219	764.4	~$0.2M
October 14, 2026	MURPHY ANDREW J	Co-Chief Scientific Officer	S	-271	765.39	~$0.2M
September 3, 2026	McCourt Marion	EVP Commercial	S	-1131	857.39	~$1.0M
September 2, 2026	Guarini Kathryn	—	S	-400	850	~$0.3M
September 2, 2026	McCourt Marion	EVP Commercial	S	-1215	850	~$1.0M
August 10, 2026	Guarini Kathryn	—	S	-400	800	~$0.3M
August 10, 2026	Zoghbi Huda Y	—	S	-800	800	~$0.6M
July 2, 2026	RYAN ARTHUR F	—	S	-200	650.15	~$0.1M
May 1, 2026	RYAN ARTHUR F	—	9 reported sale rows	78	—	~$55K
May 1, 2026	RYAN ARTHUR F	—	S	-7	706.74	~$5K
May 1, 2026	RYAN ARTHUR F	—	S	-4	707.4	~$3K
May 1, 2026	RYAN ARTHUR F	—	S	-5	701.76	~$4K
May 1, 2026	RYAN ARTHUR F	—	S	-1	712.09	~$1K
May 1, 2026	RYAN ARTHUR F	—	S	-15	702.46	~$11K
May 1, 2026	RYAN ARTHUR F	—	S	-24	703.46	~$17K
May 1, 2026	RYAN ARTHUR F	—	S	-6	709.45	~$4K
May 1, 2026	RYAN ARTHUR F	—	S	-2	710.87	~$1K
May 1, 2026	RYAN ARTHUR F	—	S	-14	705.56	~$10K
April 1, 2026	RYAN ARTHUR F	—	8 reported sale rows	92	—	~$72K
April 1, 2026	RYAN ARTHUR F	—	S	-1	771.32	~$1K
April 1, 2026	RYAN ARTHUR F	—	S	-3	772.76	~$2K
April 1, 2026	RYAN ARTHUR F	—	S	-8	773.59	~$6K
April 1, 2026	RYAN ARTHUR F	—	S	-14	775.58	~$11K
April 1, 2026	RYAN ARTHUR F	—	S	-13	776.62	~$10K
April 1, 2026	RYAN ARTHUR F	—	S	-9	777.42	~$7K
April 1, 2026	RYAN ARTHUR F	—	S	-4	778.24	~$3K
April 1, 2026	RYAN ARTHUR F	—	S	-40	779.71	~$31K
March 2, 2026	RYAN ARTHUR F	—	8 reported sale rows	67	—	~$53K
March 2, 2026	RYAN ARTHUR F	—	S	-11	785.48	~$9K
March 2, 2026	RYAN ARTHUR F	—	S	-10	783.62	~$8K
March 2, 2026	RYAN ARTHUR F	—	S	-9	784.48	~$7K
March 2, 2026	RYAN ARTHUR F	—	S	-7	777.46	~$5K
March 2, 2026	RYAN ARTHUR F	—	S	-2	778.3	~$2K
March 2, 2026	RYAN ARTHUR F	—	S	-5	779.69	~$4K
March 2, 2026	RYAN ARTHUR F	—	S	-3	780.69	~$2K
March 2, 2026	RYAN ARTHUR F	—	S	-20	788.96	~$16K
February 19, 2026	Zoghbi Huda Y	—	11 reported sale rows	1638	—	~$1.3M
February 19, 2026	Zoghbi Huda Y	—	S	-50	775.5	~$39K
February 19, 2026	Zoghbi Huda Y	—	S	-49	774.68	~$38K
February 19, 2026	Zoghbi Huda Y	—	S	-56	785.61	~$44K
February 19, 2026	Zoghbi Huda Y	—	S	-4	790	~$3K
February 19, 2026	Zoghbi Huda Y	—	S	-160	784.45	~$0.1M
February 19, 2026	Zoghbi Huda Y	—	S	-220	783.29	~$0.2M
February 19, 2026	Zoghbi Huda Y	—	S	-298	782.1	~$0.2M
February 19, 2026	Zoghbi Huda Y	—	S	-209	781.28	~$0.2M
February 19, 2026	Zoghbi Huda Y	—	S	-331	780.45	~$0.3M
February 19, 2026	Zoghbi Huda Y	—	S	-208	779.55	~$0.2M
February 19, 2026	Zoghbi Huda Y	—	S	-53	778.47	~$41K
February 9, 2026	Pitofsky Jason	SVP Controller	11 reported sale rows	2036	—	~$1.6M
February 9, 2026	Pitofsky Jason	SVP Controller	S	-144	783.23	~$0.1M
February 9, 2026	Pitofsky Jason	SVP Controller	S	-37	782.67	~$29K
February 9, 2026	Pitofsky Jason	SVP Controller	S	-26	781.37	~$20K
February 9, 2026	Pitofsky Jason	SVP Controller	S	-75	780.06	~$59K
February 9, 2026	Pitofsky Jason	SVP Controller	S	-205	779.56	~$0.2M
February 9, 2026	Pitofsky Jason	SVP Controller	S	-20	775.95	~$16K
February 9, 2026	Pitofsky Jason	SVP Controller	S	-521	776.43	~$0.4M
February 9, 2026	Pitofsky Jason	SVP Controller	S	-391	777.51	~$0.3M
February 9, 2026	Pitofsky Jason	SVP Controller	S	-563	778.35	~$0.4M
February 9, 2026	Pitofsky Jason	SVP Controller	S	-53	785.72	~$42K
February 9, 2026	Pitofsky Jason	SVP Controller	S	-1	784.66	~$1K
February 9, 2026	RYAN ARTHUR F	—	7 reported sale rows	90	—	~$70K
February 9, 2026	RYAN ARTHUR F	—	S	-12	778.53	~$9K
February 9, 2026	RYAN ARTHUR F	—	S	-5	779.41	~$4K
February 9, 2026	RYAN ARTHUR F	—	S	-3	783.34	~$2K
February 9, 2026	RYAN ARTHUR F	—	S	-2	786.29	~$2K
February 9, 2026	RYAN ARTHUR F	—	S	-57	777.56	~$44K
February 9, 2026	RYAN ARTHUR F	—	S	-10	776.59	~$8K
February 9, 2026	RYAN ARTHUR F	—	S	-1	775.63	~$1K
January 7, 2026	Bassler Bonnie L	—	S	-1500	800	~$1.2M
November 20, 2025	Bassler Bonnie L	—	S	-760	750	~$0.6M
November 7, 2025	Pitofsky Jason	VP Controller	S	-431	651.43	~$0.3M
October 29, 2025	POON CHRISTINE A	—	6 reported sale rows	6500	—	~$4.3M
October 29, 2025	POON CHRISTINE A	—	S	-100	655.1	~$66K
October 29, 2025	POON CHRISTINE A	—	S	-1915	654.42	~$1.3M
October 29, 2025	POON CHRISTINE A	—	S	-2735	653.5	~$1.8M
October 29, 2025	POON CHRISTINE A	—	S	-650	652.68	~$0.4M
October 29, 2025	POON CHRISTINE A	—	S	-388	657.29	~$0.3M
October 29, 2025	POON CHRISTINE A	—	S	-712	656.5	~$0.5M
November 1, 2024	McCourt Marion	EVP Commercial	S	-1000	844.61	~$0.8M
October 1, 2024	RYAN ARTHUR F	—	9 reported sale rows	49	—	~$51K
October 1, 2024	RYAN ARTHUR F	—	S	-7	1045.27	~$7K
October 1, 2024	RYAN ARTHUR F	—	S	-12	1047.44	~$13K
October 1, 2024	RYAN ARTHUR F	—	S	-6	1050.6	~$6K
October 1, 2024	RYAN ARTHUR F	—	S	-4	1052.44	~$4K
October 1, 2024	RYAN ARTHUR F	—	S	-2	1057.38	~$2K
October 1, 2024	RYAN ARTHUR F	—	S	-9	1044.62	~$9K
October 1, 2024	RYAN ARTHUR F	—	S	-3	1041.35	~$3K
October 1, 2024	RYAN ARTHUR F	—	S	-1	1042.31	~$1K
October 1, 2024	RYAN ARTHUR F	—	S	-5	1043.39	~$5K
October 1, 2024	McCourt Marion	EVP Commercial	S	-1000	1054.06	~$1.1M