Affiliated Managers Group, Inc. (AMG) ownership: Top institutional holder: BlackRock, Inc. ($793.48M). Insider activity: Net Seller (3 buys, 17 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 2867665.00 | $793.48M | 2026-03-31 |
| VANGUARD GROUP INC | 2683585.00 | $773.62M | 2025-12-31 |
| MORGAN STANLEY | 1732512.00 | $479.39M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1359793.00 | $376.25M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1174746.00 | $325.05M | 2026-03-31 |
| ARIEL INVESTMENTS, LLC | 1064030.00 | $294.42M | 2026-03-31 |
| Boston Partners | 971247.00 | $268.71M | 2026-03-31 |
| STATE STREET CORP | 926733.00 | $256.43M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-08 | |
| Sell | null | 2026-06-08 | |
| Sell | null | 2026-06-08 | |
| Sell | null | 2026-06-08 | |
| Buy | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 |
Back to AMG overview · AMG earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.