Regeneron Pharmaceuticals Inc (REGN) · Insider trading

What Regeneron Pharmaceuticals's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months

0 insiders, 0 trades

Sold, 12 months

$12.91M

7 insiders, 65% under a plan

Net, 12 months

−$12.91M

bought less sold

Latest filing

2026-09-03

filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

Bought Sold Largest month: $4.25M

Who traded, two years

Insider	Bought	Sold	Trades	Last trade	Holds after
Poon Christine ADirector	–	$4.25M	6	2025-10-29	8,202
McCourt MarionEVP Commercial	–	$2.85M	3	2026-09-03	12,003
Zoghbi Huda YDirector	–	$1.92M	12	2026-08-10	1,703
Pitofsky JasonSVP Controller	–	$1.87M	12	2026-02-09	6,288
Bassler Bonnie LDirector	–	$1.77M	2	2026-01-07	1,703
Guarini KathrynDirector	–	$660,000	2	2026-09-02	603
Ryan Arthur FDirector	–	$434,683	48	2026-07-02	17,303

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

Date	Insider	Trade	Shares	Price	Value	Holds after	Filing
2026-09-03	McCourt MarionEVP Commercial	Saleplan	1,131	857.39	$969,708	12,003	Form 4
2026-09-02	McCourt MarionEVP Commercial	Saleplan	1,215	850.00	$1.03M	13,134	Form 4
2026-09-02	Guarini KathrynDirector	Saleplan	400	850.00	$340,000	603	Form 4
2026-08-10	Zoghbi Huda YDirector	Saleplan	800	800.00	$640,000	1,703	Form 4
2026-08-10	Guarini KathrynDirector	Saleplan	400	800.00	$320,000	603	Form 4
2026-07-02	Ryan Arthur FDirector	Saleplan	200	650.15	$130,030	17,303	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	5	701.76	$3,509	17,598	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	15	702.46	$10,537	17,583	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	24	703.46	$16,883	17,559	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	15	704.28	$10,564	17,544	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	14	705.56	$9,878	17,530	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	7	706.74	$4,947	17,523	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	4	707.40	$2,830	17,519	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	6	709.45	$4,257	17,513	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	2	710.87	$1,422	17,511	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	5	711.49	$3,557	17,506	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	1	712.09	$712	17,505	Form 4
2026-05-01	Ryan Arthur FDirector	Saleplan	2	714.13	$1,428	17,503	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	1	771.32	$771	17,702	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	3	772.76	$2,318	17,699	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	8	773.59	$6,189	17,691	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	8	774.58	$6,197	17,683	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	14	775.58	$10,858	17,669	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	13	776.62	$10,096	17,656	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	9	777.42	$6,997	17,647	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	4	778.24	$3,113	17,643	Form 4
2026-04-01	Ryan Arthur FDirector	Saleplan	40	779.71	$31,188	17,603	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	7	777.46	$5,442	17,796	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	2	778.30	$1,557	17,794	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	5	779.69	$3,898	17,789	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	3	780.69	$2,342	17,786	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	2	781.21	$1,562	17,784	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	2	782.62	$1,565	17,782	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	10	783.62	$7,836	17,772	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	9	784.48	$7,060	17,763	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	11	785.48	$8,640	17,752	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	7	786.61	$5,506	17,745	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	2	787.34	$1,575	17,743	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	20	788.96	$15,779	17,723	Form 4
2026-03-02	Ryan Arthur FDirector	Saleplan	20	789.28	$15,786	17,703	Form 4

45 more

2026-02-19	Zoghbi Huda YDirector	Saleplan	49	774.68	$37,959	3,292	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	50	775.50	$38,775	3,242	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	53	778.47	$41,259	3,189	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	208	779.55	$162,146	2,981	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	331	780.45	$258,329	2,650	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	209	781.28	$163,288	2,441	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	298	782.10	$233,066	2,143	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	220	783.29	$172,324	1,923	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	160	784.45	$125,512	1,763	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	56	785.61	$43,994	1,707	Form 4
2026-02-19	Zoghbi Huda YDirector	Saleplan	4	790.00	$3,160	1,703	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	1	775.63	$776	17,902	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	10	776.59	$7,766	17,892	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	57	777.56	$44,321	17,835	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	12	778.53	$9,342	17,823	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	5	779.41	$3,897	17,818	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	1	780.09	$780	17,817	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	5	781.48	$3,907	17,812	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	1	782.53	$783	17,811	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	3	783.34	$2,350	17,808	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	1	784.59	$785	17,807	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	1	785.71	$786	17,806	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	2	786.29	$1,573	17,804	Form 4
2026-02-09	Ryan Arthur FDirector	Saleplan	1	787.82	$788	17,803	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	20	775.95	$15,519	6,288	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	521	776.43	$404,520	5,767	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	391	777.51	$304,006	5,376	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	563	778.35	$438,211	4,813	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	205	779.56	$159,810	4,608	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	75	780.06	$58,504	4,533	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	26	781.37	$20,316	4,507	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	37	782.67	$28,959	4,470	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	144	783.23	$112,785	4,326	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	1	784.66	$785	4,325	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Saleplan	53	785.72	$41,643	4,272	Form 4
2026-01-07	Bassler Bonnie LDirector	Saleplan	1,500	800.00	$1.20M	1,703	Form 4
2025-11-20	Bassler Bonnie LDirector	Saleplan	760	750.00	$570,000	1,548	Form 4
2025-11-07	Pitofsky JasonVP Controller	Sale	431	651.43	$280,766	4,233	Form 4
2025-10-29	Poon Christine ADirector	Sale	650	652.68	$424,242	8,202	Form 4
2025-10-29	Poon Christine ADirector	Sale	2,735	653.50	$1.79M	5,467	Form 4
2025-10-29	Poon Christine ADirector	Sale	1,915	654.42	$1.25M	3,552	Form 4
2025-10-29	Poon Christine ADirector	Sale	100	655.10	$65,510	3,452	Form 4
2025-10-29	Poon Christine ADirector	Sale	712	656.50	$467,428	2,740	Form 4
2025-10-29	Poon Christine ADirector	Sale	388	657.29	$255,029	2,352	Form 4
2024-11-01	McCourt MarionEVP Commercial	Saleplan	1,000	844.61	$844,610	12,931	Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

34 × grant or award33 × shares withheld for tax20 × option exercise2 × gift1 × inherited

Show them

Date	Insider	What	Shares	Price	Holds after	Filing
2026-09-02	Guarini KathrynDirector	Option exercise M	+400	719.37	1,003	Form 4
2026-08-19	Larosa Joseph JEVP General Counsel and Secret	Option exercise M	+12,282	381.92	45,392	Form 4
2026-08-19	Larosa Joseph JEVP General Counsel and Secret	Shares withheld for tax F	−9,019	830.15	36,373	Form 4
2026-08-18	Fenimore Christopher R.EVP Finance CFO	Option exercise M	+6,283	381.92	24,583	Form 4
2026-08-18	Fenimore Christopher R.EVP Finance CFO	Shares withheld for tax F	−4,599	813.47	19,984	Form 4
2026-08-10	Zoghbi Huda YDirector	Option exercise M	+800	376.69	2,503	Form 4
2026-08-10	Guarini KathrynDirector	Option exercise M	+400	719.37	1,003	Form 4
2026-02-19	Zoghbi Huda YDirector	Option exercise M	+1,638	376.69	3,341	Form 4
2026-02-09	Pitofsky JasonSVP Controller	Option exercise M	+1,000	492.00	6,308	Form 4
2026-01-07	Bassler Bonnie LDirector	Option exercise M	+1,500	374.12	3,203	Form 4
2026-01-02	Brown Michael SDirector	Grant or award A	+155	–	1,703	Form 4
2026-01-02	Ryan Arthur FDirector	Grant or award A	+155	–	17,903	Form 4
2026-01-02	Poon Christine ADirector	Grant or award A	+155	–	5,219	Form 4
2026-01-02	Coles N AnthonyDirector	Grant or award A	+155	–	1,714	Form 4
2026-01-02	Sing George LDirector	Grant or award A	+155	–	31,007	Form 4
2026-01-02	Goldstein Joseph LDirector	Grant or award A	+155	–	6,703	Form 4
2026-01-02	Thompson Craig B.Director	Grant or award A	+155	–	775	Form 4
2026-01-02	Schenkein David PDirector	Grant or award A	+155	–	603	Form 4
2026-01-02	Zoghbi Huda YDirector	Grant or award A	+155	–	1,703	Form 4
2026-01-02	Bassler Bonnie LDirector	Grant or award A	+155	–	1,703	Form 4
2026-01-02	Guarini KathrynDirector	Grant or award A	+155	–	603	Form 4
2025-12-31	Schleifer Leonard SDirector, Bd. Co-Chair, President & CEO	Option exercise M	+28,570	–	243,093	Form 4
2025-12-31	Schleifer Leonard SDirector, Bd. Co-Chair, President & CEO	Shares withheld for tax F	−28,570	772.09	214,523	Form 4
2025-12-31	Yancopoulos GeorgeDirector, Bd. Co-Chair, President & CSO	Option exercise M	+28,570	–	339,030	Form 4
2025-12-31	Yancopoulos GeorgeDirector, Bd. Co-Chair, President & CSO	Shares withheld for tax F	−28,570	772.09	310,460	Form 4
2025-12-30	Sing George LDirector	Option exercise M	+9,212	520.01	37,040	Form 4
2025-12-30	Sing George LDirector	Shares withheld for tax F	−6,188	774.03	30,852	Form 4
2025-12-09	Schleifer Leonard SDirector, Bd. Co-Chair, President & CEO	Option exercise M	+172,723	555.67	369,668	Form 4
2025-12-09	Schleifer Leonard SDirector, Bd. Co-Chair, President & CEO	Shares withheld for tax F	−155,145	701.51	214,523	Form 4
2025-12-09	Yancopoulos GeorgeDirector, Bd. Co-Chair, President & CSO	Option exercise M	+146,815	555.67	442,334	Form 4
2025-12-09	Yancopoulos GeorgeDirector, Bd. Co-Chair, President & CSO	Shares withheld for tax F	−131,874	701.51	310,460	Form 4
2025-12-09	Van Plew Daniel PEVP & General Mgr, Industrial	Shares withheld for tax F	−2,552	701.51	21,673	Form 4
2025-12-09	McCourt MarionEVP Commercial	Shares withheld for tax F	−1,021	701.51	14,349	Form 4
2025-12-09	Murphy Andrew JEVP Research	Shares withheld for tax F	−4,229	701.51	47,833	Form 4
2025-12-08	Larosa Joseph JEVP General Counsel and Secret	Shares withheld for tax F	−1,396	712.94	29,517	Form 4
2025-12-08	Van Plew Daniel PEVP & General Mgr, Industrial	Shares withheld for tax F	−1,906	712.94	24,225	Form 4
2025-12-08	McCourt MarionEVP Commercial	Shares withheld for tax F	−1,336	712.94	15,370	Form 4
2025-12-08	Fenimore Christopher R.EVP Finance CFO	Shares withheld for tax F	−992	712.94	18,300	Form 4
2025-12-08	Murphy Andrew JEVP Research	Shares withheld for tax F	−1,699	712.94	52,062	Form 4
2025-12-08	Pitofsky JasonVP Controller	Shares withheld for tax F	−989	712.94	5,308	Form 4
2025-12-05	Larosa Joseph JEVP General Counsel and Secret	Grant or award A	+2,476	–	30,913	Form 4
2025-12-05	Van Plew Daniel PEVP & General Mgr, Industrial	Grant or award A	+3,715	–	26,131	Form 4
2025-12-05	McCourt MarionEVP Commercial	Grant or award A	+2,476	–	16,706	Form 4
2025-12-05	Fenimore Christopher R.EVP Finance CFO	Grant or award A	+3,027	–	19,292	Form 4
2025-12-05	Murphy Andrew JEVP Research	Grant or award A	+3,715	–	53,761	Form 4
2025-12-05	Pitofsky JasonVP Controller	Grant or award A	+2,064	–	6,297	Form 4
2025-11-20	Larosa Joseph JEVP General Counsel and Secret	Option exercise M	+14,450	555.67	35,525	Form 4
2025-11-20	Larosa Joseph JEVP General Counsel and Secret	Shares withheld for tax F	−12,686	736.77	22,839	Form 4
2025-11-20	Bassler Bonnie LDirector	Option exercise M	+760	371.40	2,308	Form 4
2025-10-30	Poon Christine ADirector	Option exercise M	+2,712	520.01	5,064	Form 4
2025-10-30	Murphy Andrew JEVP Research	Gift G	−1,538	–	50,046	Form 4
2025-10-29	Poon Christine ADirector	Option exercise M	+6,500	520.01	8,852	Form 4
2025-10-29	Murphy Andrew JEVP Research	Option exercise M	+35,000	555.67	84,074	Form 4
2025-10-29	Murphy Andrew JEVP Research	Shares withheld for tax F	−32,490	648.82	51,584	Form 4
2025-01-02	Bassler Bonnie LDirector	Grant or award A	+166	–	1,548	Form 4
2025-01-02	Brown Michael SDirector	Grant or award A	+166	–	1,548	Form 4
2025-01-02	Goldstein Joseph LDirector	Grant or award A	+166	–	6,548	Form 4
2025-01-02	Guarini KathrynDirector	Grant or award A	+166	–	448	Form 4
2025-01-02	Poon Christine ADirector	Grant or award A	+166	–	2,352	Form 4
2025-01-02	Ryan Arthur FDirector	Grant or award A	+166	–	17,748	Form 4
2025-01-02	Zoghbi Huda YDirector	Grant or award A	+166	–	1,548	Form 4
2025-01-02	Coles N AnthonyDirector	Grant or award A	+166	–	1,559	Form 4
2025-01-02	Thompson Craig B.Director	Grant or award A	+166	–	620	Form 4
2025-01-02	Schenkein David PDirector	Grant or award A	+166	–	448	Form 4
2025-01-02	Sing George LDirector	Grant or award A	+166	–	27,828	Form 4
2024-12-31	Sing George LDirector	Option exercise M	+3,338	413.33	29,610	Form 4
2024-12-31	Sing George LDirector	Shares withheld for tax F	−1,948	708.19	27,662	Form 4
2024-12-20	Poon Christine ADirector	Inherited W	+14	–	2,186	Form 4
2024-12-16	Fenimore Christopher R.SVP Finance & CFO	Shares withheld for tax F	−491	730.81	16,265	Form 4
2024-12-16	Larosa Joseph JEVP General Counsel and Secret	Shares withheld for tax F	−702	730.81	30,075	Form 4
2024-12-16	McCourt MarionEVP Commercial	Shares withheld for tax F	−759	730.81	14,230	Form 4
2024-12-16	Murphy Andrew JEVP Research	Shares withheld for tax F	−1,054	730.81	49,074	Form 4
2024-12-16	Pitofsky JasonVP Controller	Shares withheld for tax F	−298	730.81	4,664	Form 4
2024-12-16	Stahl NeilEVP Research and Development	Shares withheld for tax F	−304	730.81	48,829	Form 4
2024-12-16	Van Plew Daniel PEVP & General Mgr, Industrial	Shares withheld for tax F	−969	730.81	34,792	Form 4
2024-12-09	Van Plew Daniel PEVP & General Mgr, Industrial	Shares withheld for tax F	−492	787.00	35,761	Form 4
2024-12-09	Fenimore Christopher R.SVP Finance & CFO	Shares withheld for tax F	−1,140	787.00	16,756	Form 4
2024-12-09	Pitofsky JasonVP Controller	Shares withheld for tax F	−149	787.00	4,962	Form 4
2024-12-09	Larosa Joseph JEVP General Counsel and Secret	Shares withheld for tax F	−492	787.00	30,777	Form 4
2024-12-09	McCourt MarionEVP Commercial	Shares withheld for tax F	−274	787.00	14,989	Form 4
2024-12-09	Murphy Andrew JEVP Research	Shares withheld for tax F	−492	787.00	50,128	Form 4
2024-12-09	Stahl NeilEVP Research and Development	Shares withheld for tax F	−466	787.00	49,133	Form 4
2024-12-06	Van Plew Daniel PEVP & General Mgr, Industrial	Grant or award A	+3,499	–	36,253	Form 4
2024-12-06	Fenimore Christopher R.SVP Finance & CFO	Grant or award A	+2,591	–	17,896	Form 4
2024-12-06	Pitofsky JasonVP Controller	Grant or award A	+907	–	5,111	Form 4
2024-12-06	Larosa Joseph JEVP General Counsel and Secret	Grant or award A	+2,332	–	31,269	Form 4
2024-12-06	McCourt MarionEVP Commercial	Grant or award A	+2,332	–	15,263	Form 4
2024-12-06	Murphy Andrew JEVP Research	Grant or award A	+3,499	–	50,620	Form 4
2024-11-08	Murphy Andrew JEVP Research	Gift G	−1,185	–	47,121	Form 4
2024-11-01	McCourt MarionEVP Commercial	Option exercise M	+1,000	381.40	13,931	Form 4

How to read it

Buy, sale: Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan: A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after: The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value: Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

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