Michael Peterson sold $4.2M of SEIC stock

Michael Peterson, Executive Vice President of Sei Investments Co (SEIC), sold 37,500 shares of SEIC stock worth $4.2M, per an SEC Form 4 filed Sep 1, 2026.

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

The trade happened on Aug 28, 2026, 4 days before it was made public.

SEIC has moved -1.2% since the trade date, from $111.63 to $110.25 (Nov 11, 2026 close).