SCHEDULE 13G/A

AFFILIATED MANAGERS GROUP INC

Common Stock · CUSIP: 008252108

Event date: 2024-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Clarkston Capital Partners, LLC

  Shares: 1,572,189.00 · Class: 5.20%

• Clarkston Companies, Inc.

  Shares: 1,572,189.00 · Class: 5.20%

• Modell Capital LLC

  Shares: 1,572,189.00 · Class: 5.20%

• Jeffrey A. Hakala

  Shares: 1,572,189.00 · Class: 5.20%

• Gerald W. Hakala

  Shares: 1,572,189.00 · Class: 5.20%

• Jeremy J. Modell

  Shares: 1,572,189.00 · Class: 5.20%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.