George L Sing sold $20.4M of REGN stock

George L Sing, Dir of Regeneron Pharmaceuticals, Inc. (REGN), sold 21,129 shares of REGN stock worth $20.4M, per an SEC Form 4 filed Nov 4, 2026.

The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.

The trade happened on Nov 2, 2026, 2 days before it was made public.

REGN has moved -5.9% since the trade date, from $961.26 to $904.35 (Nov 6, 2026 close).