Who owns Acadian Asset Management?
Institutional ownership of AAMI from SEC Form 13F filings across 207 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.
207
13F holders
$1.57B
value, 2026 filers
62%
of shares outstanding (22.1M sh)
41
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 AAMI's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.5M | $320.9M | 0.0% | 12.6% | -1.9% |
| 2 | JENNISON ASSOCIATES LLC | 1.5M | $109.2M | 0.1% | 4.3% | -24.5% |
| 3 | Invesco Ltd. | 1.4M | $98.4M | 0.0% | 3.9% | +233.5% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.2M | $84.1M | 0.0% | 3.3% | -49.2% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 969,724 | $69.4M | 0.0% | 2.7% | +29.7% |
| 6 | Woodline Partners LP | 883,540 | $63.2M | 0.2% | 2.5% | -37.0% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 813,352 | $58.2M | 0.0% | 2.3% | -8.0% |
| 8 | Avantyr Capital Partners, LPNEW | 767,793 | $54.9M | 2.0% | 2.2% | new |
| 9 | MORGAN STANLEY | 623,422 | $44.6M | 0.0% | 1.7% | +16.0% |
| 10 | Nuveen, LLC | 602,378 | $43.1M | 0.0% | 1.7% | +2.4% |
| 11 | FEDERATED HERMES, INC. | 574,597 | $41.1M | 0.1% | 1.6% | +1.1% |
| 12 | Allspring Global Investments Holdings, LLC | 553,623 | $39.8M | 0.1% | 1.6% | +32.1% |
| 13 | TWO SIGMA INVESTMENTS, LP | 523,939 | $37.5M | 0.0% | 1.5% | +9.4% |
| 14 | Sixth Street Partners Management Company, L.P.NEW | 403,342 | $28.8M | 5.0% | 1.1% | new |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 403,342 | $28.8M | 0.0% | 1.1% | -11.0% |
| 16 | AmundiNEW | 317,315 | $22.7M | 0.0% | 0.9% | new |
| 17 | NORTHERN TRUST CORP | 303,111 | $21.7M | 0.0% | 0.9% | +8.6% |
| 18 | Public Sector Pension Investment Board | 261,794 | $18.7M | 0.0% | 0.7% | +77.7% |
| 19 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 249,082 | $17.8M | 0.0% | 0.7% | +1069.4% |
| 20 | GOLDMAN SACHS GROUP INC | 244,568 | $17.5M | 0.0% | 0.7% | +11.5% |
| 21 | FMR LLC | 231,204 | $16.5M | 0.0% | 0.6% | +8.5% |
| 22 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 207,796 | $14.9M | 0.0% | 0.6% | -21.2% |
| 23 | Bank of New York Mellon Corp | 204,912 | $14.7M | 0.0% | 0.6% | +4.4% |
| 24 | PRINCIPAL FINANCIAL GROUP INC | 196,988 | $14.1M | 0.0% | 0.6% | -3.7% |
| 25 | FIRST TRUST ADVISORS LP | 194,899 | $13.9M | 0.0% | 0.5% | +0.4% |
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.