Who owns American Assets Trust (AAT)
Which tracked institutional funds hold AAT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AAT company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on AAT is one-sided between 2026-Q1 and 2026-Q2: 83 added or opened and 23 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AAT’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AAT divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 224 tracked filers holding AAT, 119 increased or opened the position and 110 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AAT between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 5
- Polymer Capital Management (US) LLC$1M
- Horizon Investments, LLC$872K
- Y-Intercept (Hong Kong) Ltd$569K
- Jupiter Topco LLC$555K
- Squarepoint Ops LLC$522K
Full exits 13
- LSV ASSET MANAGEMENT$36M
- WATERFALL ASSET MANAGEMENT, LLC$5M
- BESSEMER GROUP INC$5M
- CSM Advisors, LLC$4M
- CANADA LIFE ASSURANCE Co$2M
- Penserra Capital Management LLC$1M
Largest adds
- BlackRock, Inc.$52M
- AMERICAN ASSETS INC$46M
- VANGUARD PORTFOLIO MANAGEMENT LLC$36M
- STATE STREET CORP$17M
- FULLER & THALER ASSET MANAGEMENT, INC.$14M
- VANGUARD CAPITAL MANAGEMENT LLC$12M
Largest trims
- JPMORGAN CHASE & CO$11M
- MILLENNIUM MANAGEMENT LLC$7M
- JANE STREET GROUP, LLC$3M
- STRS OHIO$1M
- BARCLAYS PLC$871K
- FIRST TRUST ADVISORS LP$861K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 9,162,398 | $226M | 17.3% | 2026-Q2 |
| AMERICAN ASSETS INC | 7,374,599 | $182M | 13.9% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 5,472,335 | $135M | 10.3% | 2026-Q2 |
| STATE STREET CORP trimmed | 2,797,915 | $69M | 5.3% | 2026-Q2 |
| Senvest Management, LLC trimmed | 2,651,358 | $65M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 2,052,700 | $51M | 3.9% | 2026-Q2 |
| American Assets Investment Management, LLC | 1,477,340 | $36M | 2.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,394,216 | $34M | 2.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,279,982 | $32M | 2.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 1,049,224 | $26M | 2.0% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,032,169 | $25M | 2.0% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 1,019,791 | $25M | 1.9% | 2026-Q2 |
| MORGAN STANLEY added | 953,785 | $24M | 1.8% | 2026-Q2 |
| PRIVATE MANAGEMENT GROUP INC trimmed | 800,019 | $20M | 1.5% | 2026-Q2 |
| Invesco Ltd. trimmed | 709,148 | $18M | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 665,613 | $16M | 1.3% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 663,092 | $16M | 1.3% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 618,313 | $15M | 1.2% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 589,233 | $15M | 1.1% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 516,647 | $13M | 1.0% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 452,076 | $11M | 0.9% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 435,679 | $11M | 0.8% | 2026-Q2 |
| UBS Group AG trimmed | 418,648 | $10M | 0.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 371,454 | $9M | 0.7% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 368,268 | $9M | 0.7% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 335,253 | $8M | 0.6% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 326,786 | $8M | 0.6% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 313,371 | $8M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 312,450 | $8M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 303,376 | $7M | 0.6% | 2026-Q2 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC added | 297,597 | $7M | 0.6% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 297,438 | $7M | 0.6% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 296,680 | $7M | 0.6% | 2026-Q2 |
| Legal & General Group Plc trimmed | 285,941 | $7M | 0.5% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 271,282 | $7M | 0.5% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 262,468 | $6M | 0.5% | 2026-Q2 |
| FMR LLC trimmed | 254,596 | $6M | 0.5% | 2026-Q2 |
| Argosy-Lionbridge Management, LLC added | 247,506 | $6M | 0.5% | 2026-Q2 |
| Nuveen, LLC trimmed | 247,436 | $6M | 0.5% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 228,870 | $6M | 0.4% | 2026-Q2 |
| Allianz Asset Management GmbH added | 219,531 | $5M | 0.4% | 2026-Q2 |
| Man Group plc added | 173,746 | $4M | 0.3% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 173,034 | $4M | 0.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 168,653 | $4M | 0.3% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P added | 163,315 | $4M | 0.3% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 162,441 | $4M | 0.3% | 2026-Q2 |
| XTX Topco Ltd added | 138,997 | $3M | 0.3% | 2026-Q2 |
| Lighthouse Investment Partners, LLC added | 136,643 | $3M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 131,998 | $3M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 127,290 | $3M | 0.2% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 120,219 | $3M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP added | 103,277 | $3M | 0.2% | 2026-Q2 |
| NORGES BANK trimmed | 103,100 | $3M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 98,500 | $2M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 80,914 | $2M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 78,965 | $2M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 77,235 | $1M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT CO LTD added | 76,510 | $2M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 71,851 | $2M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 71,071 | $2M | 0.1% | 2026-Q2 |
| CITIGROUP INC trimmed | 70,500 | $2M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 68,800 | $2M | 0.1% | 2026-Q2 |
| Asset Management One Co., Ltd. added | 67,426 | $2M | 0.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 66,200 | $2M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 64,254 | $2M | 0.1% | 2026-Q2 |
| DENALI ADVISORS LLC | 62,800 | $2M | 0.1% | 2026-Q2 |
| State of New Jersey Common Pension Fund D | 62,735 | $2M | 0.1% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 62,071 | $2M | 0.1% | 2026-Q2 |
| Polymer Capital Management (US) LLC new | 59,869 | $1M | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 58,390 | $1M | 0.1% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO trimmed | 56,918 | $1M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 55,290 | $1M | 0.1% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 53,300 | $1M | 0.1% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC added | 52,976 | $1M | 0.1% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 52,885 | $1M | 0.1% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 51,567 | $1M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 51,309 | $1M | 0.1% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 51,190 | $1M | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 48,540 | $1M | 0.1% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS added | 47,481 | $1M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 44,162 | $1M | 0.1% | 2026-Q2 |
| Vanguard Investments Australia, Ltd. trimmed | 43,884 | $1M | 0.1% | 2026-Q2 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 42,055 | $1M | 0.1% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. trimmed | 40,603 | $1M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 38,819 | $958K | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 37,522 | $926K | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP added | 37,205 | $919K | 0.1% | 2026-Q2 |
| Creative Planning added | 36,617 | $904K | 0.1% | 2026-Q2 |
| Graham Capital Management, L.P. trimmed | 36,616 | $904K | 0.1% | 2026-Q2 |
| Horizon Investments, LLC added | 35,326 | $872K | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND | 35,012 | $864K | 0.1% | 2026-Q2 |
| Inspire Investing, LLC added | 33,847 | $836K | 0.1% | 2026-Q2 |
| Mariner, LLC added | 32,042 | $791K | 0.1% | 2026-Q2 |
| Odyssean, LLC added | 31,098 | $768K | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 30,742 | $759K | 0.1% | 2026-Q2 |
| EVOLVE PRIVATE WEALTH, LLC added | 30,190 | $745K | 0.1% | 2026-Q2 |
| Crossingbridge Advisors, LLC trimmed | 30,000 | $741K | 0.1% | 2026-Q2 |
| AlphaCentric Advisors LLC trimmed | 30,000 | $741K | 0.1% | 2026-Q2 |
| MACQUARIE GROUP LTD | 29,457 | $727K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC trimmed | 29,415 | $726K | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.