Douglas S Knopper sold $981K of MGNI stock

Douglas S Knopper, Dir of Magnite, Inc. (MGNI), sold 37,337 shares of MGNI stock worth $981K, per an SEC Form 4 filed Sep 18, 2026.

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

The trade happened on Sep 17, 2026, 1 day before it was made public.

MGNI has moved +6.9% since the trade date, from $25.63 to $27.39 (Nov 6, 2026 close).