Joseph J Larosa

Insider

First SEC filing: Nov. 18, 2003 · Latest: Nov. 18, 2003

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 44 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

44 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Dec. 8, 2025	REGN	F	1,396	$712.94	$995,264	29,517 Direct	-4.52%	Disposed	17.5% (price as of 2026-08-21)
Dec. 5, 2025	REGN	A	2,476	—	—	30,913 Direct	+8.71%	Acquired	(price as of 2026-08-21)
Dec. 5, 2025	REGN	A	12,210	—	—	12,210 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 20, 2025	REGN	M	14,450	$555.67	$8,029,432	35,525 Direct	+68.56%	Acquired	50.8% (price as of 2026-08-21)
Nov. 20, 2025	REGN	F	12,686	$736.77	$9,346,664	22,839 Direct	-35.71%	Disposed	13.7% (price as of 2026-08-21)
Nov. 20, 2025	REGN	M	14,450	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Aug. 23, 2021	REGN	S 10b5-1	3,383	$661.80	$2,238,869	13,224 Direct	-20.37%	Disposed	26.6% (price as of 2026-08-21)
Aug. 23, 2021	REGN	S 10b5-1	41	$665.40	$27,281	13,183 Direct	-0.31%	Disposed	25.9% (price as of 2026-08-21)
Aug. 23, 2021	REGN	S 10b5-1	1	$666.22	$666	13,182 Direct	-0.01%	Disposed	25.7% (price as of 2026-08-21)
Aug. 20, 2021	REGN	M 10b5-1	10,000	$179.13	$1,791,300	23,182 Direct	+75.86%	Acquired	367.7% (price as of 2026-08-21)
Aug. 20, 2021	REGN	F 10b5-1	6,575	$664.85	$4,371,389	16,607 Direct	-28.36%	Disposed	26.0% (price as of 2026-08-21)
Aug. 20, 2021	REGN	M 10b5-1	10,000	—	—	30,000 Direct	-25.00%	Disposed	(price as of 2026-08-21)
Dec. 9, 2020	REGN	A	1,930	—	—	16,368 Direct	+13.37%	Acquired	(price as of 2026-08-21)
Dec. 9, 2020	REGN	A	19,950	—	—	19,950 Direct	—	Acquired	(price as of 2026-08-21)
Aug. 31, 2020	REGN	S	4,672	$615.04	$2,873,467	14,438 Direct	-24.45%	Disposed	36.2% (price as of 2026-08-21)
Aug. 27, 2020	REGN	F	2,131	$614.87	$1,310,288	19,110 Direct	-10.03%	Disposed	36.3% (price as of 2026-08-21)
Aug. 27, 2020	REGN	M	6,000	—	—	4,000 Direct	-60.00%	Disposed	(price as of 2026-08-21)
Aug. 27, 2020	REGN	M	4,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Aug. 27, 2020	REGN	M	6,000	$52.03	$312,180	20,438 Direct	+41.56%	Acquired	1510.2% (price as of 2026-08-21)
Aug. 27, 2020	REGN	F	3,197	$614.87	$1,965,739	17,241 Direct	-15.64%	Disposed	36.3% (price as of 2026-08-21)
Aug. 27, 2020	REGN	M	4,000	$52.03	$208,120	21,241 Direct	+23.20%	Acquired	1510.2% (price as of 2026-08-21)
May 15, 2020	REGN	S 10b5-1	8,380	$572.00	$4,793,360	14,438 Direct	-36.73%	Disposed	46.5% (price as of 2026-08-21)
May 14, 2020	REGN	M 10b5-1	18,311	$59.20	$1,084,011	32,749 Direct	+126.83%	Acquired	1315.2% (price as of 2026-08-21)
May 14, 2020	REGN	F 10b5-1	9,931	$573.18	$5,692,251	22,818 Direct	-30.32%	Disposed	46.2% (price as of 2026-08-21)
May 14, 2020	REGN	M 10b5-1	18,311	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Dec. 11, 2019	REGN	A	2,625	—	—	14,438 Direct	+22.22%	Acquired	(price as of 2026-08-21)
Dec. 11, 2019	REGN	A	24,500	—	—	24,500 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 12, 2018	REGN	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 12, 2017	REGN	A	23,337	—	—	23,337 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 16, 2016	REGN	A	24,565	—	—	24,565 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2016	REGN	F	4,943	$392.63	$1,940,770	11,813 Direct	-29.50%	Disposed	113.4% (price as of 2026-08-21)
Dec. 16, 2015	REGN	A	28,900	—	—	28,900 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2015	REGN	M	1,689	$59.20	$99,989	16,756 Direct	+11.21%	Acquired	1315.2% (price as of 2026-08-21)
Sept. 1, 2015	REGN	M	1,689	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 25, 2015	REGN	M	3,097	$59.20	$183,342	15,067 Direct	+25.87%	Acquired	1315.2% (price as of 2026-08-21)
March 25, 2015	REGN	M	3,097	—	—	1,689 Direct	-64.71%	Disposed	(price as of 2026-08-21)
March 16, 2015	REGN	M 10b5-1	18,311	$59.20	$1,084,011	28,311 Direct	+183.11%	Acquired	1315.2% (price as of 2026-08-21)
March 16, 2015	REGN	S 10b5-1	18,311	$450.00	$8,239,950	10,000 Direct	-64.68%	Disposed	86.2% (price as of 2026-08-21)
March 16, 2015	REGN	M	1,970	$59.20	$116,624	11,970 Direct	+19.70%	Acquired	1315.2% (price as of 2026-08-21)
March 16, 2015	REGN	M	1,970	—	—	4,786 Direct	-29.16%	Disposed	(price as of 2026-08-21)
March 16, 2015	REGN	M 10b5-1	18,311	—	—	54,933 Direct	-25.00%	Disposed	(price as of 2026-08-21)
Dec. 16, 2014	REGN	A	6,000	—	—	10,000 Direct	+150.00%	Acquired	(price as of 2026-08-21)
Dec. 16, 2014	REGN	A	34,000	—	—	34,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 13, 2013	REGN	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 14, 2012	REGN	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 16, 2011	REGN	A	4,000	—	—	4,000 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2011	REGN	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2011	REGN	A	6,756	—	—	6,756 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2011	REGN	A	73,244	—	—	73,244 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 17, 2003	MRK		None	—	—	—	—	—	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Dec. 5, 2025	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (12,210)	$726.71	Dec. 5, 2035	12,210	Acquired
Nov. 20, 2025	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (14,450)	$555.67	Dec. 16, 2025	14,450	Disposed
Aug. 20, 2021	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (10,000)	$179.13	Dec. 14, 2022	10,000	Disposed
Dec. 9, 2020	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (19,950)	$492.00	Dec. 9, 2030	19,950	Acquired
Aug. 27, 2020	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (6,000)	$52.03	Dec. 16, 2021	6,000	Disposed
Aug. 27, 2020	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (4,000)	$52.03	Dec. 16, 2021	4,000	Disposed
May 14, 2020	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (18,311)	$59.20	Sept. 1, 2021	18,311	Disposed
Dec. 11, 2019	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (24,500)	$372.46	Dec. 11, 2029	24,500	Acquired
Dec. 12, 2018	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (20,000)	$381.40	Dec. 12, 2028	20,000	Acquired
Dec. 12, 2017	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (23,337)	$378.98	Dec. 12, 2027	23,337	Acquired
Dec. 16, 2016	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (24,565)	$381.92	Dec. 16, 2026	24,565	Acquired
Dec. 16, 2015	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (28,900)	$555.67	Dec. 16, 2025	28,900	Acquired
Sept. 1, 2015	REGN	Incentive Stock Option (right to buy)	Common Stock (1,689)	$59.20	Sept. 1, 2021	1,689	Disposed
March 25, 2015	REGN	Incentive Stock Option (right to buy)	Common Stock (3,097)	$59.20	Sept. 1, 2021	3,097	Disposed
March 16, 2015	REGN	Incentive Stock Option (right to buy)	Common Stock (1,970)	$59.20	Sept. 1, 2021	1,970	Disposed
March 16, 2015	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (18,311)	$59.20	Sept. 1, 2021	18,311	Disposed
Dec. 16, 2014	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (6,000)	$52.03	Dec. 16, 2021	6,000	Acquired
Dec. 16, 2014	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (34,000)	$399.66	Dec. 16, 2024	34,000	Acquired
Dec. 13, 2013	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (40,000)	$270.43	Dec. 13, 2023	40,000	Acquired
Dec. 14, 2012	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (50,000)	$179.13	Dec. 14, 2022	50,000	Acquired
Dec. 16, 2011	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (4,000)	$52.03	Dec. 16, 2021	4,000	Acquired
Sept. 1, 2011	REGN	Incentive Stock Option (right to buy)	Common Stock (6,756)	$59.20	Sept. 1, 2021	6,756	Acquired
Sept. 1, 2011	REGN	Non-Qualified Stock Option (right to buy)	Common Stock (73,244)	$59.20	Sept. 1, 2021	73,244	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).