Affiliated Managers Group, Inc. (AMG) Shareholders & Insider Trades
Affiliated Managers shareholders at a glance
The largest holder of Affiliated Managers stock is BlackRock Advisors LLC, with 2.6 million shares (10.09% of the company), worth about $961.00 million as of September 25, 2026. The 10 largest holders together own 45.8%.
In Q2 2026, 587 institutional holdings reports listed shares worth $8.56 billion.
Insiders reported 54 transactions in the last two years: 5 sales worth $7.94 million and 1 purchase. The newest one on file is from May 8, 2026 (Matos Rodriguez Felix V, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 8, 2026.
Affiliated Managers Group, Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Affiliated Managers shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 2.6 million | 10.09% | $961.0M |
| Eaton Vance Management | 1.5 million | 5.75% | $548.0M |
| Vanguard Portfolio Management LLC | 1.4 million | 5.38% | $512.0M |
| Vanguard Capital Management LLC | 1.2 million | 4.45% | $424.0M |
| Boston Partners Global Investors, Inc. | 1.0 million | 3.88% | $369.0M |
| Ariel Investments LLC | 999,676 | 3.87% | $368.0M |
| State Street Corporation | 883,323 | 3.42% | $325.0M |
| Millennium Management LLC | 875,116 | 3.38% | $322.0M |
| Fuller & Thaler Asset Management, Inc. | 857,756 | 3.32% | $316.0M |
| DFA Australia Ltd. | 597,627 | 2.31% | $220.0M |
As of September 25, 2026.
Affiliated Managers institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 587 | – | $8.6B |
| Q1 2026 | 566 | 24.8 million | $6.9B |
| Q4 2025 | 530 | 26.7 million | $7.7B |
| Q3 2025 | 466 | 26.6 million | $6.4B |
| Q2 2025 | 449 | 26.9 million | $5.3B |
| Q1 2025 | 414 | 27.7 million | $4.7B |
| Q4 2024 | 424 | 28.4 million | $5.2B |
| Q3 2024 | 438 | 28.6 million | $5.1B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Affiliated Managers insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Matos Rodriguez Felix V | May 8, 2026 | Director | Sale at price 300.18 per share. | $300,180 |
| Ryan David Christopher | May 6, 2026 | Director | Sale at price 305.06 per share. | $1.0M |
| Cates G. Staley | May 6, 2026 | Director | Purchase at price 305.83 per share. | $458,745 |
| Padiyar Kavita | Mar 9, 2026 | General Counsel | Sale at price 278.24 per share. | $612,128 |
| Wojcik Thomas M. | Mar 6, 2026 | President | Sale at price 286.30 per share. | $2.3M |
| Horgen Jay C | Mar 5, 2026 | Chief Executive Officer | -- | – |
| Palandjian Tracy Pun | Mar 5, 2026 | Director | -- | – |
| Franqui Annette V | Mar 5, 2026 | Director | -- | – |
| Starr Loren M | Mar 5, 2026 | Director | -- | – |
| Horgen Jay C | Mar 5, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Wojcik Thomas M. | Mar 5, 2026 | President | Stock Award(Grant) at price 0.00 per share. | – |
| Padiyar Kavita | Mar 5, 2026 | General Counsel | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 54 insider transactions in the last two years.
Questions and answers
Who owns the most Affiliated Managers stock?
BlackRock Advisors LLC, with 10.09% of the company (as of September 25, 2026). Next: Eaton Vance Management (5.75%) and Vanguard Portfolio Management LLC (5.38%).
How many institutions own Affiliated Managers stock?
587 institutional holdings reports listed Affiliated Managers shares in Q2 2026 worth $8.56 billion.
Are Affiliated Managers insiders buying or selling the stock?
In the last two years insiders reported 5 sales and 1 purchase (54 transactions in all); the newest on file is from May 8, 2026.
