Affiliated Managers Group, Inc.
Ownership
Ownership Structure
Who owns Affiliated Managers Group, Inc. (AMG)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 96.1% of the shares are freely tradable; institutional investors hold 98.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.09 | 2,867,665 | +2.4 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 6.70 | 1,732,512 | +1.6 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.26 | 1,359,793 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.54 | 1,174,746 | +0.0 | 03/31/2026 |
| Boston Partners Global Investors, Inc | 3.87 | 1,001,967 | +3.2 | 06/30/2026 |
| Ariel Investments, LLC | 3.87 | 999,676 | -6.0 | 06/30/2026 |
| State Street Corp | 3.58 | 926,733 | -0.3 | 03/31/2026 |
| Millennium Management LLC | 3.38 | 875,116 | +16,202.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.58 | 925,090 | +0.0 | 08/31/2026 |
| FullerThaler Behavioral Small-Cap Equity | 3.15 | 815,790 | +12.7 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Palandjian Tracy P. | Director | 18,375 | 6,537,825 $ | Aug 15, 2026 | direct |
| Matos Rodriguez Felix V. | Director | 5,023 | 1,787,183 $ | Aug 15, 2026 | direct |
| Starr Loren M | Director | 2,653 | 943,937 $ | Aug 15, 2026 | direct |
| Franqui Annette | Director | 2,439 | 867,796 $ | Aug 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 15, 2026 | Franqui Annette | Director | Other | 477 | 0.00 | – |
| Aug 15, 2026 | Matos Rodriguez Felix V. | Director | Other | 654 | 0.00 | – |
| Aug 15, 2026 | Starr Loren M | Director | Other | 716 | 0.00 | – |
| Aug 15, 2026 | Palandjian Tracy P. | Director | Other | 848 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.