Joseph J. Larosa

CIK: 0001238303

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)2 (22.2%)

Derivative conversions

Awards (A)2 (22.2%)

Compensation grants

Other (G, F, J, C, D, …)5 (55.6%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

REGN

REGENERON PHARMACEUTICALS, INC.

Officer

Discretionary Trading P&L

Holdings

Transaction History (9 total)

REGN
REGENERON PHARMACEUTICALS, INC.
Aug 19, 2026
Exercise(M)
Direct
12.3K shares at avg. $381.92$4.7M
REGN
REGENERON PHARMACEUTICALS, INC.
Aug 19, 2026
Tax Payment(F)
Direct
9K shares at avg. $830.15$7.5M
REGN
REGENERON PHARMACEUTICALS, INC.
Dec 8, 2025
Tax Payment(F)
Direct
1.4K shares at avg. $712.94$995K
REGN
REGENERON PHARMACEUTICALS, INC.
Dec 5, 2025
Award(A)
Direct
2.5K shares-
REGN
REGENERON PHARMACEUTICALS, INC.
Nov 20, 2025
Tax Payment(F)
Direct
12.7K shares at avg. $736.77$9.3M
REGN
REGENERON PHARMACEUTICALS, INC.
Nov 20, 2025
Exercise(M)
Direct
14.5K shares at avg. $555.67$8.0M
REGN
REGENERON PHARMACEUTICALS, INC.
Dec 16, 2024
Tax Payment(F)
Direct
702 shares at avg. $730.81$513K
REGN
REGENERON PHARMACEUTICALS, INC.
Dec 9, 2024
Tax Payment(F)
Direct
492 shares at avg. $787.00$387K
REGN
REGENERON PHARMACEUTICALS, INC.
Dec 6, 2024
Award(A)
Direct
2.3K shares-

		Type	Shares	Price		Ownership
Aug 19, 2026	REGN REGENERON PHARMACEUTICALS, INC.	Exercise(M)	12,282	$381.92	$4,690,741	Direct
Aug 19, 2026	REGN REGENERON PHARMACEUTICALS, INC.	Tax Payment(F)	9,019	$830.15	$7,487,123	Direct
Dec 8, 2025	REGN REGENERON PHARMACEUTICALS, INC.	Tax Payment(F)	1,396	$712.94	$995,264	Direct
Dec 5, 2025	REGN REGENERON PHARMACEUTICALS, INC.	Award(A)	2,476	-	-	Direct
Nov 20, 2025	REGN REGENERON PHARMACEUTICALS, INC.	Tax Payment(F)	12,686	$736.77	$9,346,664	Direct
Nov 20, 2025	REGN REGENERON PHARMACEUTICALS, INC.	Exercise(M)	14,450	$555.67	$8,029,431	Direct
Dec 16, 2024	REGN REGENERON PHARMACEUTICALS, INC.	Tax Payment(F)	702	$730.81	$513,029	Direct
Dec 9, 2024	REGN REGENERON PHARMACEUTICALS, INC.	Tax Payment(F)	492	$787.00	$387,204	Direct
Dec 6, 2024	REGN REGENERON PHARMACEUTICALS, INC.	Award(A)	2,332	-	$0	Direct

1-9 of 9 transactions

About LAROSA JOSEPH J

LAROSA JOSEPH J (SEC CIK 0001238303) files insider reports with the SEC as EVP General Counsel and Secret of REGENERON PHARMACEUTICALS, INC. (REGN).

Signal8 holds 5 ownership filings by LAROSA JOSEPH J, all Form 4s, filed between Dec 10, 2024 and Aug 21, 2026. Those filings report 9 transactions, from Dec 6, 2024 to Aug 19, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on LAROSA JOSEPH J's filings is in TARRYTOWN, NY.

Recent filings by LAROSA JOSEPH J

Aug 19, 2026: Option exercise of REGN shares (Form 4, code M).
Aug 19, 2026: Tax withholding of REGN shares (Form 4, code F).
Dec 8, 2025: Tax withholding of REGN shares (Form 4, code F).
Dec 5, 2025: Grant or award of REGN shares (Form 4, code A).
Nov 20, 2025: Tax withholding of REGN shares (Form 4, code F).

Other insiders filing for REGENERON PHARMACEUTICALS, INC. (REGN)

Guarini Kathryn, Director
BROWN MICHAEL S, Director
McCourt Marion, EVP Commercial
MURPHY ANDREW J, Co-Chief Scientific Officer
Fenimore Christopher R., EVP Finance CFO
Zoghbi Huda Y, Director

How to read Form 4 transaction codes