Institutional Ownership
Affiliated Managers Group In
CUSIP 008252108COMAMGQ1 2026
13D / 13G Filings
36
Schedule 13D/13G on record
Beneficial Filers
9
Distinct reporting persons
Largest Stake
18.2%
Max % of class reported
Institutional Holders
534
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
36 filings · latest Mar 5, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Mar 5, 2026 | The Vanguard Group | 13G/A | 10.2% | 2.72M | SEC |
| 2 | Feb 13, 2026 | Clarkston Capital Partners, LLC | 13G/A | 3.2% | 904.1K | SEC |
| 3 | Nov 7, 2025 | Morgan Stanley | 13G/A | 7.0% | 1.98M | SEC |
| 4 | Oct 30, 2025 | Integrated Core Strategies (Us) LLC | 13G/A | 11.0% | 1.02M | SEC |
| 5 | Oct 30, 2025 | The Vanguard Group | 13G/A | 9.8% | 2.77M | SEC |
| 6 | Jun 6, 2025 | Integrated Core Strategies (Us) LLC | 13G | 11.0% | 1.51M | SEC |
| 7 | May 14, 2025 | Integrated Core Strategies (Us) LLC | 13G | 11.0% | 1.22M | SEC |
| 8 | Feb 14, 2025 | Clarkston Capital Partners, LLC | 13G/A | 5.2% | 1.57M | SEC |
| 9 | Nov 6, 2024 | Morgan Stanley | 13G/A | 8.0% | 2.38M | SEC |
| 10 | Jun 7, 2024 | Blackrock Inc. | 13G/A | 10.2% | 3.24M | SEC |
26 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Affiliated Managers Group In.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 2.87M | $793.48M |
| 2 | Morgan Stanley | 1.73M | $479.39M |
| 3 | Ariel Investments, LLC | 1.06M | $294.42M |
| 4 | Boston Partners | 971.2K | $268.71M |
| 5 | State Street Corp | 926.7K | $256.43M |
| 6 | Fuller & Thaler Asset Management, Inc. | 760.2K | $210.35M |
| 7 | Dimensional Fund Advisors LP | 718.3K | $198.75M |
| 8 | Geode Capital Management, LLC | 635.8K | $175.96M |
| 9 | Lyrical Asset Management LP | 502.1K | $138.94M |
| 10 | Allianz Asset Management Gmbh | 488.7K | $135.23M |