AAT Institutional Ownership & Shareholders
AMERICAN ASSETS TRUST INC (AAT) is currently held by 252 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.37B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of AAT tracked by InsiderSet, reporting ownership valued at approximately $226.22M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $200.29M, representing an estimated loss of -11.46% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 63% of the total disclosed AAT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., American Assets Inc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in AMERICAN ASSETS TRUST INC (AAT).
This page ranks the largest institutional AAT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
252
Total Reported Value
$1.37B
Largest Holder
Blackrock, Inc.
Largest Position
$226.22M
Insider Transactions (90d)
18
Latest Filing Quarter
Q2 2026
New Institutional Positions
55
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 9,162,398 | $226,219,605 | $200,290,020 | -$25,929,585 | -11.46% | |
| American Assets Inc | 51.86% | 7,571,235 | $160,964,456 | $165,507,197 | +$4,542,741 | +2.82% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,472,335 | $135,111,951 | $119,625,243 | -$15,486,708 | -11.46% | |
| State Street Corp | 0.00% | 2,797,915 | $69,080,521 | $61,162,422 | -$7,918,099 | -11.46% | |
| Senvest Management, Llc | 1.92% | 2,651,358 | $65,462,029 | $57,958,686 | -$7,503,343 | -11.46% | |
| Lsv Asset Management | 0.10% | 2,212,047 | $54,615,000 | $48,355,347 | -$6,259,653 | -11.46% | |
| Vanguard Capital Management Llc | 0.00% | 2,052,700 | $50,681,163 | $44,872,022 | -$5,809,141 | -11.46% | |
| Geode Capital Management, Llc | 0.00% | 1,394,216 | $34,428,567 | $30,477,562 | -$3,951,005 | -11.48% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,279,982 | $31,602,756 | $27,980,407 | -$3,622,349 | -11.46% | |
| American Assets Investment Management, Llc | 1.94% | 1,477,340 | $31,408,248 | $32,294,652 | +$886,404 | +2.82% | |
| Ameriprise Financial Inc | 0.01% | 1,049,224 | $25,723,109 | $22,936,037 | -$2,787,072 | -10.83% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 1,032,169 | $25,484,253 | $22,563,214 | -$2,921,039 | -11.46% | |
| Fuller & Thaler Asset Management, Inc. | 0.07% | 1,019,791 | $25,178,639 | $22,292,631 | -$2,886,008 | -11.46% | |
| Morgan Stanley | 0.00% | 953,785 | $23,548,963 | $20,849,740 | -$2,699,223 | -11.46% | |
| Private Management Group Inc | 0.52% | 800,019 | $19,752,469 | $17,488,415 | -$2,264,054 | -11.46% | |
| Invesco Ltd. | 0.00% | 709,148 | $17,508,864 | $15,501,975 | -$2,006,889 | -11.46% | |
| Northern Trust Corp | 0.00% | 665,613 | $16,433,984 | $14,550,300 | -$1,883,684 | -11.46% | |
| Dimensional Fund Advisors Lp | 0.00% | 663,092 | $16,372,169 | $14,495,191 | -$1,876,978 | -11.46% | |
| Two Sigma Investments, Lp | 0.01% | 618,313 | $15,266,148 | $13,516,322 | -$1,749,826 | -11.46% | |
| Algert Global Llc | 0.17% | 589,233 | $14,548,163 | $12,880,633 | -$1,667,530 | -11.46% | |
| Jpmorgan Chase & Co | 0.00% | 516,647 | $12,889,104 | $11,293,903 | -$1,595,201 | -12.38% | |
| Bank Of New York Mellon Corp | 0.00% | 452,076 | $11,161,756 | $9,882,381 | -$1,279,375 | -11.46% | |
| Hotchkis & Wiley Capital Management Llc | 0.03% | 435,679 | $10,756,915 | $9,523,943 | -$1,232,972 | -11.46% | |
| Ubs Group Ag | 0.00% | 418,648 | $10,336,419 | $9,151,645 | -$1,184,774 | -11.46% | |
| Bessemer Group Inc | 0.01% | 375,358 | $9,267,000 | $8,205,326 | -$1,061,674 | -11.46% | |
| Goldman Sachs Group Inc | 0.00% | 371,454 | $9,171,190 | $8,119,984 | -$1,051,206 | -11.46% | |
| Aqr Capital Management Llc | 0.00% | 368,268 | $9,092,536 | $8,050,338 | -$1,042,198 | -11.46% | |
| Csm Advisors, Llc | 0.18% | 337,996 | $8,344,000 | $7,388,593 | -$955,407 | -11.45% | |
| Panagora Asset Management Inc | 0.03% | 335,253 | $8,277,397 | $7,328,631 | -$948,766 | -11.46% | |
| Raymond James Financial Inc | 0.00% | 326,786 | $8,068,338 | $7,143,542 | -$924,796 | -11.46% | |
| Vanguard Fiduciary Trust Co | 0.00% | 312,450 | $7,714,391 | $6,830,157 | -$884,234 | -11.46% | |
| Principal Financial Group Inc | 0.00% | 303,376 | $7,490,353 | $6,631,799 | -$858,554 | -11.46% | |
| O'Shaughnessy Asset Management, Llc | 0.03% | 297,597 | $7,347,670 | $6,505,470 | -$842,200 | -11.46% | |
| Jacobs Levy Equity Management, Inc | 0.03% | 297,438 | $7,343,744 | $6,501,995 | -$841,749 | -11.46% | |
| Citadel Advisors Llc | 0.00% | 296,680 | $7,325,029 | $6,485,425 | -$839,604 | -11.46% | |
| Legal & General Group Plc | 0.00% | 285,941 | $7,059,882 | $6,250,670 | -$809,212 | -11.46% | |
| First Trust Advisors Lp | 0.00% | 271,282 | $6,697,951 | $5,930,225 | -$767,726 | -11.46% | |
| Qube Research & Technologies Ltd | 0.01% | 262,468 | $6,480,335 | $5,737,550 | -$742,785 | -11.46% | |
| Fmr Llc | 0.00% | 254,596 | $6,285,986 | $5,565,469 | -$720,517 | -11.46% | |
| Argosy-Lionbridge Management, Llc | 3.84% | 247,506 | $6,110,923 | $5,410,481 | -$700,442 | -11.46% | |
| Nuveen, Llc | 0.00% | 247,436 | $6,109,196 | $5,408,951 | -$700,245 | -11.46% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.01% | 228,870 | $5,650,800 | $5,003,098 | -$647,702 | -11.46% | |
| Allianz Asset Management Gmbh | 0.01% | 219,531 | $5,420,220 | $4,798,948 | -$621,272 | -11.46% | |
| Man Group Plc | 0.01% | 173,746 | $4,289,789 | $3,798,088 | -$491,701 | -11.46% | |
| Hsbc Holdings Plc | 0.00% | 173,034 | $4,278,299 | $3,782,523 | -$495,776 | -11.59% | |
| Bank Of America Corp | 0.00% | 168,653 | $4,164,043 | $3,686,755 | -$477,288 | -11.46% | |
| Martingale Asset Management L P | 0.10% | 163,315 | $4,032,248 | $3,570,066 | -$462,182 | -11.46% | |
| Public Sector Pension Investment Board | 0.01% | 162,441 | $4,010,668 | $3,550,960 | -$459,708 | -11.46% | |
| Xtx Topco Ltd | 0.04% | 138,997 | $3,431,836 | $3,038,474 | -$393,362 | -11.46% | |
| Lighthouse Investment Partners, Llc | 0.10% | 136,643 | $3,373,716 | $2,987,016 | -$386,700 | -11.46% |
Frequently asked questions about AAT
Who are the largest institutional holders of AAT?
The largest institutional holders of AAT reported in the latest SEC Form 13F filings include Blackrock, Inc., American Assets Inc, Vanguard Portfolio Management Llc, State Street Corp, and Senvest Management, Llc. InsiderSet ranks institutional holders by their latest reported AAT position.
What is AAT institutional ownership?
This page tracks AAT positions reported by institutional investment managers through SEC Form 13F. AMERICAN ASSETS TRUST INC (AAT) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own AAT?
InsiderSet currently tracks 252 institutional managers reporting AAT holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of AAT shareholders.
How much AAT stock do institutions own?
Institutional investment managers disclosed approximately $1.37B in AAT holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was AAT institutional ownership last updated?
The latest AAT institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional AAT holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its AAT position after the reporting date.
Are institutions buying or selling AAT?
Institutional buying and selling can be analyzed by comparing AAT positions across consecutive 13F reporting periods. InsiderSet's AAT Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View AAT ownership changes.
How has AAT institutional ownership changed over time?
InsiderSet tracks AAT institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.