Key facts
- This page summarizes Joseph J. Larosa's Form 4 filing for REGENERON PHARMACEUTICALS, INC. (REGN).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 09 Dec 2025, 16:09.
Joseph J. Larosa - 05 Dec 2025 Form 4 Insider Report for REGENERON PHARMACEUTICALS, INC. (REGN)
- Reporting relationship
- EVP General Counsel and Secret
- Issuer ticker
- REGN
- Reported as of
- 05 Dec 2025
- Net transaction value
- -$995,264
- SEC form
- 4
- Accepted by SEC
- 09 Dec 2025, 16:09:43 UTC
- Prior SEC filing
- 24 Nov 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Joseph LaRosa
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Joseph J. Larosa filed Form 4 for REGENERON PHARMACEUTICALS, INC. (REGN) on 09 Dec 2025.
Change
- Previous filing in this sequence was filed on 24 Nov 2025.
- Current net transaction value: -$995,264.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001238303
Primary reporting owner
LAROSA JOSEPH J
- Relationship
- EVP General Counsel and Secret
- Address
- 777 OLD SAW MILL RIVER ROAD, TARRYTOWN
- Signature
- /s/ Joseph LaRosa
- Signature date
- 09 Dec 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
REGN
transaction
Common Stock
Award
- Transaction value
- $0
- Shares
- +2,476
- Change %
- +8.7%
- Price
- $0.000000
- Shares after
- 30,913
- Date
- 05 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
REGN
transaction
Common Stock
Tax liability
- Transaction value
- $995,264
- Shares
- -1,396
- Change %
- -4.5%
- Price
- $712.94
- Shares after
- 29,517
- Date
- 08 Dec 2025
- Ownership
- Direct
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 3,402
- Date
- 05 Dec 2025
- Ownership
- By 2024 GRAT
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 9,000
- Date
- 05 Dec 2025
- Ownership
- By 2025 GRAT
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 396
- Date
- 05 Dec 2025
- Ownership
- By 401(k) Plan
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
REGN
transaction
Derivative
Non-Qualified Stock Option (right to buy)
Award
- Transaction value
- $0
- Shares
- +12,210
- Change %
- Price
- $0.000000
- Shares after
- 12,210
- Date
- 05 Dec 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 12,210
- Exercise price
- $726.71
- Footnotes
- F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
Award of Restricted Stock under the Second Amended and Restated 2014 Long-Term Incentive Plan that vests 50% on December 5, 2027 and 50% on December 5, 2029.
Footnote F2
The stock option award vests in four equal annual installments, commencing one year after the date of grant.