Leonard S. Schleifer - 09 Dec 2025 Form 4 Insider Report for REGENERON PHARMACEUTICALS, INC. (REGN)

Role
Bd. Co-Chair, President & CEO, Director
Signature
/s/ Leonard S. Schleifer
Issuer symbol
REGN
Transactions as of
09 Dec 2025
Net transactions value
-$12,858,780
Form type
4
Filing time
11 Dec 2025, 16:23:04 UTC
Previous filing
13 Jun 2024
Next filing
05 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
SCHLEIFER LEONARD S Bd. Co-Chair, President & CEO, Director 777 OLD SAW MILL RIVER ROAD, TARRYTOWN /s/ Leonard S. Schleifer 11 Dec 2025 0001218629

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction REGN Common Stock Options Exercise $95,976,989 +172,723 +88% $555.67 369,668 09 Dec 2025 Direct
transaction REGN Common Stock Tax liability $108,835,769 -155,145 -42% $701.51 214,523 09 Dec 2025 Direct
holding REGN Common Stock 127,484 09 Dec 2025 By 2024 GRAT
holding REGN Common Stock 300,000 09 Dec 2025 By 2025 GRAT
holding REGN Common Stock 5,989 09 Dec 2025 By 401(k) Plan
holding REGN Common Stock 39,985 09 Dec 2025 By Trust

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction REGN Non-Qualified Stock Option (right to buy) Options Exercise $0 -172,723 -100% $0.000000 0 09 Dec 2025 Common Stock 172,723 $555.67 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The stock option award vested in four equal annual installments, commencing one year after the date of grant.