Affiliated Managers Group (AMG)
Builds equity partnerships with independent investment firms while preserving their operating autonomy.
$360.28
After hours−0.52 (−0.14%)
At close$360.80(−1.06%)
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13F · 13D/G · Form 4
| Institutions | 96.57% | 25.51M shares | |
|---|---|---|---|
| 580 holders · as of Jun 30, 2026 | |||
| Insiders | 3.00% | 792.4K shares | |
| 15 holders · as of Aug 18, 2026 | |||
| Other | 0.43% | 112.7K shares | |
| remainder | |||
26.41M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
13F, as of Jun 30, 2026
580 holders · 25.51M shares · 82 new positions · 241 increased · 219 reduced · 60 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 2.77M | 10.50% | −94.9K | Aug 7, 2026 |
| Morgan Stanley | 1.49M | 5.63% | −245.3K | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 1.39M | 5.27% | +32.0K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 1.15M | 4.36% | −23.7K | Aug 13, 2026 |
| Boston Partners | 1.00M | 3.79% | +30.7K | Aug 4, 2026 |
| Ariel Investments, LLC | 999.7K | 3.78% | −64.4K | Aug 14, 2026 |
| State Street Corp | 883.3K | 3.34% | −43.4K | Aug 7, 2026 |
| Millennium Management LLC | 875.1K | 3.31% | +869.7K | Aug 14, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Morgan Stanley | 5.50% | 1.46M | 13G | Aug 12, 2026 |
| Vanguard Capital Management | 5.19% | 1.39M | 13G | Apr 29, 2026 |
| Vanguard Portfolio Management | 5.12% | 1.37M | 13G | Apr 28, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jun 8, 2026 | Jay C. Horgendirector, officer: President and CEO | Sale | 17,500 | $338.27 | 204,706 |
| May 6, 2026 | David Christopher Ryandirector | Sale | 3,402 | $305.06 | 1,092 |
| May 8, 2026 | Rodriguez Felix V. Matosdirector | Sale | 1,000 | $300.18 | 4,369 |
| May 6, 2026 | G. Staley Catesdirector | Purchase | 1,500 | $305.83 | 6,405 |
| Mar 9, 2026 | Kavita Padiyarofficer: General Counsel & Corp. Sec. | Sale | 2,200 | $278.24 | 42,672 |
| Mar 6, 2026 | Thomas M. Wojcikofficer: President and COO | Sale | 8,000 | $286.30 | 159,465 |
House and Senate disclosures
Not reported.