March 5, 2026 · Form 4 insider transaction
Horgen Jay C. sold 18,333 shares of Affiliated Managers Group, Inc. at $299.18 per share, a transaction worth $5.48M. The trade was recorded as shares withheld for taxes and disclosed on an SEC Form 4, filed 4 days after the transaction.
Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above.