Colin Walsh bought $10.3M of ATTO stock

Colin Walsh, Dir of Attovia Therapeutics, Inc. (ATTO), bought 585,000 shares of ATTO stock worth $10.3M, per an SEC Form 4 filed Aug 14, 2026.

It was an open-market purchase.

The trade happened on Aug 5, 2026, 9 days before it was made public.

ATTO has moved -30.9% since the trade date, from $21.90 to $15.13 (Nov 13, 2026 close).