AMERICAN ASSETS TRUST INC (AAT) Top Institutional Shareholders
AMERICAN ASSETS TRUST INC (AAT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $980.51M in AAT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of AAT tracked by InsiderSet, reporting ownership valued at approximately $174.02M in its March 31, 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 $225.44M, representing an estimated gain of +29.55% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 67% 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
233
Total Reported Value
$980.51M
Largest Holder
Blackrock, Inc.
Largest Position
$174.02M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
137
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% | 9,452,442 | $174,019,450 | $225,440,742 | +$51,421,292 | +29.55% | |
| American Assets Inc | 45.49% | 7,374,599 | $135,766,368 | $175,884,186 | +$40,117,818 | +29.55% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,396,960 | $99,358,034 | $128,717,496 | +$29,359,462 | +29.55% | |
| Senvest Management, Llc | 2.19% | 3,577,054 | $65,853,564 | $85,312,738 | +$19,459,174 | +29.55% | |
| State Street Corp | 0.00% | 2,844,330 | $52,364,115 | $67,837,271 | +$15,473,156 | +29.55% | |
| Vanguard Capital Management Llc | 0.00% | 2,118,674 | $39,004,788 | $50,530,375 | +$11,525,587 | +29.55% | |
| American Assets Investment Management, Llc | 1.85% | 1,477,340 | $27,197,830 | $35,234,559 | +$8,036,729 | +29.55% | |
| Geode Capital Management, Llc | 0.00% | 1,336,571 | $24,609,945 | $31,877,218 | +$7,267,273 | +29.53% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,261,384 | $23,222,079 | $30,084,008 | +$6,861,929 | +29.55% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 960,837 | $17,689,009 | $22,915,962 | +$5,226,953 | +29.55% | |
| Ameriprise Financial Inc | 0.00% | 952,582 | $17,537,034 | $22,719,081 | +$5,182,047 | +29.55% | |
| Morgan Stanley | 0.00% | 883,482 | $16,264,927 | $21,071,046 | +$4,806,119 | +29.55% | |
| Private Management Group Inc | 0.43% | 806,584 | $14,849,211 | $19,237,028 | +$4,387,817 | +29.55% | |
| Invesco Ltd. | 0.00% | 805,626 | $14,831,575 | $19,214,180 | +$4,382,605 | +29.55% | |
| Northern Trust Corp | 0.00% | 774,537 | $14,259,225 | $18,472,707 | +$4,213,482 | +29.55% | |
| Dimensional Fund Advisors Lp | 0.00% | 616,883 | $11,356,928 | $14,712,660 | +$3,355,732 | +29.55% | |
| Fuller & Thaler Asset Management, Inc. | 0.04% | 595,760 | $10,967,950 | $14,208,876 | +$3,240,926 | +29.55% | |
| Two Sigma Investments, Lp | 0.01% | 542,732 | $9,991,696 | $12,944,158 | +$2,952,462 | +29.55% | |
| Hotchkis & Wiley Capital Management Llc | 0.03% | 465,859 | $8,576,464 | $11,110,737 | +$2,534,273 | +29.55% | |
| Bank Of New York Mellon Corp | 0.00% | 459,495 | $8,459,311 | $10,958,956 | +$2,499,645 | +29.55% | |
| Millennium Management Llc | 0.01% | 450,195 | $8,288,090 | $10,737,151 | +$2,449,061 | +29.55% | |
| Ubs Group Ag | 0.00% | 425,329 | $7,830,307 | $10,144,097 | +$2,313,790 | +29.55% | |
| Goldman Sachs Group Inc | 0.00% | 417,988 | $7,695,165 | $9,969,014 | +$2,273,849 | +29.55% | |
| First Trust Advisors Lp | 0.01% | 410,598 | $7,559,109 | $9,792,762 | +$2,233,653 | +29.55% | |
| Aqr Capital Management Llc | 0.00% | 357,762 | $6,586,390 | $8,532,624 | +$1,946,234 | +29.55% | |
| Legal & General Group Plc | 0.00% | 353,872 | $6,514,786 | $8,439,847 | +$1,925,061 | +29.55% | |
| Fmr Llc | 0.00% | 318,977 | $5,872,371 | $7,607,601 | +$1,735,230 | +29.55% | |
| Jacobs Levy Equity Management, Inc | 0.02% | 318,977 | $5,872,367 | $7,607,601 | +$1,735,234 | +29.55% | |
| Panagora Asset Management Inc | 0.02% | 317,468 | $5,844,586 | $7,571,612 | +$1,727,026 | +29.55% | |
| Vanguard Fiduciary Trust Co | 0.00% | 305,895 | $5,631,527 | $7,295,596 | +$1,664,069 | +29.55% | |
| Principal Financial Group Inc | 0.00% | 298,898 | $5,502,713 | $7,128,717 | +$1,626,004 | +29.55% | |
| Waterfall Asset Management, Llc | 2.88% | 279,323 | $5,142,336 | $6,661,854 | +$1,519,518 | +29.55% | |
| O'Shaughnessy Asset Management, Llc | 0.02% | 270,027 | $4,971,197 | $6,440,144 | +$1,468,947 | +29.55% | |
| Raymond James Financial Inc | 0.00% | 267,767 | $4,929,586 | $6,386,243 | +$1,456,657 | +29.55% | |
| Nuveen, Llc | 0.00% | 257,650 | $4,743,337 | $6,144,953 | +$1,401,616 | +29.55% | |
| Citadel Advisors Llc | 0.00% | 221,856 | $4,084,369 | $5,291,266 | +$1,206,897 | +29.55% | |
| Argosy-Lionbridge Management, Llc | 2.71% | 209,863 | $3,863,578 | $5,005,233 | +$1,141,655 | +29.55% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.01% | 205,392 | $3,781,267 | $4,898,599 | +$1,117,332 | +29.55% | |
| Public Sector Pension Investment Board | 0.01% | 169,363 | $3,117,973 | $4,039,308 | +$921,335 | +29.55% | |
| Jane Street Group, Llc | 0.00% | 165,000 | $3,037,650 | $3,935,250 | +$897,600 | +29.55% | |
| Prudential Financial Inc | 0.00% | 159,675 | $2,939,617 | $3,808,249 | +$868,632 | +29.55% | |
| Bank Of America Corp | 0.00% | 157,652 | $2,902,374 | $3,760,000 | +$857,626 | +29.55% | |
| Man Group Plc | 0.01% | 152,772 | $2,812,532 | $3,643,612 | +$831,080 | +29.55% | |
| Rhumbline Advisers | 0.00% | 149,800 | $2,757,803 | $3,572,730 | +$814,927 | +29.55% | |
| Allianz Asset Management Gmbh | 0.00% | 141,194 | $2,599,381 | $3,367,477 | +$768,096 | +29.55% | |
| Bnp Paribas Asset Management Holding S.A. | 0.00% | 122,150 | $2,248,782 | $2,913,278 | +$664,496 | +29.55% | |
| Martingale Asset Management L P | 0.06% | 119,393 | $2,198,026 | $2,847,523 | +$649,497 | +29.55% | |
| Qube Research & Technologies Ltd | 0.00% | 113,144 | $2,082,981 | $2,698,484 | +$615,503 | +29.55% | |
| Xtx Topco Ltd | 0.04% | 110,121 | $2,027,328 | $2,626,386 | +$599,058 | +29.55% | |
| Swiss National Bank | 0.00% | 96,500 | $1,776,565 | $2,301,525 | +$524,960 | +29.55% |
Frequently asked questions about AAT
Who owns the most AAT stock?
The largest holders of AAT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for AMERICAN ASSETS TRUST INC (AAT).
Is AAT widely held by superinvestors?
Many widely followed stocks like AAT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly AAT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.