Key facts
- This page summarizes Christopher R. Fenimore's Form 4 filing for REGENERON PHARMACEUTICALS, INC. (REGN).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 20 Aug 2026, 16:01.
Christopher R. Fenimore - 18 Aug 2026 Form 4 Insider Report for REGENERON PHARMACEUTICALS, INC. (REGN)
- Reporting relationship
- EVP Finance CFO
- Issuer ticker
- REGN
- Reported as of
- 18 Aug 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 20 Aug 2026, 16:01:28 UTC
- Prior SEC filing
- 09 Dec 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Christopher R. Fenimore
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Christopher R. Fenimore filed Form 4 for REGENERON PHARMACEUTICALS, INC. (REGN) on 20 Aug 2026.
Change
- Previous filing in this sequence was filed on 09 Dec 2025.
- Current net transaction value: $0.
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 0001697422
Primary reporting owner
Fenimore Christopher R.
- Relationship
- EVP Finance CFO
- Address
- 777 OLD SAW MILL RIVER ROAD, TARRYTOWN
- Signature
- /s/ Christopher R. Fenimore
- Signature date
- 20 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
REGN
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +6,283
- Change %
- +34%
- Price
- $381.92*
- Shares after
- 24,583
- Date
- 18 Aug 2026
- Ownership
- Direct
REGN
transaction
Common Stock
Tax liability
- Transaction value
- Shares
- -4,599
- Change %
- -19%
- Price
- $813.47*
- Shares after
- 19,984
- Date
- 18 Aug 2026
- Ownership
- Direct
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,574
- Date
- 18 Aug 2026
- Ownership
- By 401(k) Plan
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 1,897
- Date
- 18 Aug 2026
- Ownership
- By Trust
- Footnotes
- F1
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 25
- Date
- 18 Aug 2026
- Ownership
- by Trust for Daugh
REGN
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 25
- Date
- 18 Aug 2026
- Ownership
- by Trust for Son
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)
Options Exercise
- Transaction value
- Shares
- -6,283
- Change %
- -51%
- Price
- $0.000000*
- Shares after
- 6,000
- Date
- 18 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 6,283
- Exercise price
- $381.92
- 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
These shares are held in a trust for the benefit of the reporting person's spouse. The reporting person and the reporting person's spouse are trustees of the trust.
Footnote F2
The stock option award vested in four equal annual installments, commencing one year after the date of grant.