Who owns Affiliated Managers Group, Inc.?
Institutional ownership of AMG from SEC Form 13F filings across 344 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
344
13F holders
$5.61B
value, 2026 filers
65.1%
of shares outstanding (17.2M sh)
40
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of AMG's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 2.8M | $938.3M | 0.0% | 10.5% | -3.3% |
| 2 | MORGAN STANLEY | 1.5M | $503.3M | 0.0% | 5.6% | -14.2% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.4M | $471.0M | 0.0% | 5.3% | +2.4% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.2M | $389.5M | 0.0% | 4.4% | -51.0% |
| 5 | MILLENNIUM MANAGEMENT LLC | 875,116 | $296.1M | 0.1% | 3.3% | +16202.5% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 590,757 | $200.0M | 0.0% | 2.2% | -7.1% |
| 7 | Allianz Asset Management GmbH | 479,594 | $152.9M | 0.1% | 1.8% | -1.9% |
| 8 | BANK OF AMERICA CORP /DE/ | 432,420 | $146.3M | 0.0% | 1.6% | +5.6% |
| 9 | Invesco Ltd. | 380,623 | $128.8M | 0.0% | 1.4% | +20.3% |
| 10 | NORGES BANKNEW | 361,473 | $122.3M | 0.0% | 1.4% | new |
| 11 | NORTHERN TRUST CORP | 322,670 | $109.2M | 0.0% | 1.2% | -7.5% |
| 12 | JANE STREET GROUP, LLC | 309,134 | $104.6M | 0.0% | 1.2% | +22.4% |
| 13 | Sixth Street Partners Management Company, L.P.NEW | 287,795 | $97.4M | 16.8% | 1.1% | new |
| 14 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 287,795 | $97.4M | 0.0% | 1.1% | -6.6% |
| 15 | Bank of New York Mellon Corp | 281,967 | $95.4M | 0.0% | 1.1% | -6.1% |
| 16 | Qube Research & Technologies Ltd | 268,737 | $90.9M | 0.1% | 1% | +74.2% |
| 17 | GOLDMAN SACHS GROUP INC | 258,331 | $87.4M | 0.0% | 1% | +39.4% |
| 18 | Fisher Asset Management, LLC | 246,463 | $83.4M | 0.0% | 0.9% | -2.7% |
| 19 | RAYMOND JAMES FINANCIAL INC | 239,235 | $81.0M | 0.0% | 0.9% | +3.4% |
| 20 | CITADEL ADVISORS LLC | 198,492 | $67.2M | 0.0% | 0.8% | -19.7% |
| 21 | ALLIANCEBERNSTEIN L.P. | 189,739 | $52.5M | 0.0% | 0.7% | -7.9% |
| 22 | Caisse de depot et placement du Quebec | 182,041 | $61.6M | 0.1% | 0.7% | -17.6% |
| 23 | FMR LLC | 177,576 | $60.1M | 0.0% | 0.7% | -1.3% |
| 24 | UBS Group AG | 175,776 | $59.5M | 0.0% | 0.7% | +36.1% |
| 25 | PRICE T ROWE ASSOCIATES INC /MD/ | 166,559 | $56,365 | 0.0% | 0.6% | -9.3% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.