REGENERON PHARMACEUTICALS, INC. 4

EVP General Counsel and Secretary Joseph J. LaRosa exercised 12,282 Regeneron stock options and had 9,019 shares withheld/sold to cover taxes on August 19, 2026.

On August 19, 2026, EVP General Counsel and Secretary Joseph J. LaRosa exercised a non-qualified stock option for 12,282 shares of Regeneron Pharmaceuticals common stock at an exercise price of $381.92 per share, receiving 12,282 shares. On the same day, he disposed of 9,019 shares at an effective price of $830.15 per share in a transaction coded “F,” indicating shares withheld or sold to cover taxes related to the option exercise or associated equity compensation. Following these transactions, he held 36,373 shares directly, plus additional indirect holdings through 2024 and 2025 GRATs and a 401(k) plan, while the exercised option (originally expiring December 16, 2026) was fully exercised, consistent with a routine four-year vesting schedule.

Filing Facts

CIK

872589

Ticker

REGN

Form

4

Source Type

fda

Accession

0001238303-26-000002

Alert Tier

6