Exhibit 21.1

Subsidiaries of American Assets Trust, Inc.

The following list sets forth American Assets
Trust, Inc.s subsidiaries as of March 30, 2011.



|                                       |  |                                          
|-------------------------------------- |  | -----------------------------------------
|Name                                   |  | Jurisdiction of Formation /
Incorporation
|AAT Oregon Master Tenant, LLC          |  | Delaware                                 
|ABW 2181 Holdings, LLC                 |  | Hawaii                                   
|ABW Holdings, LLC                      |  | Delaware                                 
|ABW Lewers, LLC                        |  | Hawaii                                   
|Alamo Stonecrest Holdings, LLC         |  | Delaware                                 
|Alamo Vista Holdings, LLC              |  | Delaware                                 
|American Assets Services, Inc.         |  | Delaware                                 
|American Assets Trust Management, LLC  |  | Delaware                                 
|American Assets Trust, LP              |  | Maryland                                 
|Beach Walk Holdings, LLC               |  | Delaware                                 
|Broadway 101 Sorrento Holdings, LLC    |  | Delaware                                 
|Broadway 101 Stonecrest Holdings, LLC  |  | Delaware                                 
|Broadway 225 Sorrento Holdings, LLC    |  | Delaware                                 
|Broadway 225 Stonecrest Holdings, LLC  |  | Delaware                                 
|Carmel County Plaza, LP                |  | California                               
|Carmel Mountain Pad, LLC               |  | California                               
|Del Monte Center Holdings, LLC         |  | Delaware                                 
|Del Monte San Jose Holdings, LLC       |  | California                               
|Del Monte-DMCH, LLC                    |  | Delaware                                 
|Del Monte-DMSJH, LLC                   |  | Delaware                                 
|Del Monte-KMBC, LLC                    |  | Delaware                                 
|Del Monte-POH, LLC                     |  | Delaware                                 
|EBW Hotel , LLC                        |  | Hawaii                                   
|ICW Plaza Holdings, LLC                |  | Delaware                                 
|ICW Plaza Merger Sub , LLC             |  | Delaware                                 
|ICW Valencia Holdings, LLC             |  | California                               
|ICW Valencia, LLC                      |  | Delaware                                 
|Imperial Strand Holdings, LLC          |  | Delaware                                 
|Imperial Strand, LLC                   |  | Delaware                                 
|Kearny Mesa Business Center, LLC       |  | Delaware                                 
|King Desert Hillside, LLC              |  | California                               
|King Desert Oceanside, LLC             |  | California                               
|King Street Assets, LLC                |  | Delaware                                 
|King Street Holdings, LP               |  | California                               
|Landmark FireHill Holdings, LLC        |  | Delaware                                 
|Landmark Venture Holdings, LLC         |  | Delaware                                 
|Landmark Venture JV, LLC               |  | Delaware                                 
|Lomas Palisades CA general partnership |  | California                               
|Lomas Palisades GP LLC                 |  | Delaware                                 
|Mariners Point Holdings, LLC          |  | Delaware                                 
|Mariners Point, LLC                   |  | California                               
|Pacific Carmel Mountain Assets, LLC    |  | Delaware                                 
|Pacific Carmel Mountain Holdings, LP   |  | California                               
|Pacific Del Mar Assets, LLC            |  | Delaware                                 
|Pacific Firecreek Holdings, LLC        |  | Delaware                                 
|Pacific North Court GP, LLC            |  | Delaware                                 
|Pacific North Court Holdings, LP       |  | California                               



---

|                                         |  |                                          
|---------------------------------------- |  | -----------------------------------------
|Name                                     |  | Jurisdiction of Formation /
Incorporation
|Pacific Oceanside Holdings, LLC          |  | Delaware                                 
|Pacific Santa Fe Assets, LLC             |  | Delaware                                 
|Pacific Santa Fe Holdings, LP            |  | California                               
|Pacific Solana Beach Assets, LLC         |  | Delaware                                 
|Pacific Solana Beach Holdings, LP        |  | California                               
|Pacific Sorrento Valley Assets II, LLC   |  | Delaware                                 
|Pacific Sorrento Valley Holdings II, LP  |  | California                               
|Pacific South Court Assets, LLC          |  | Delaware                                 
|Pacific South Court Holdings, LP         |  | California                               
|Pacific Torrey Daycare Assets, LLC       |  | Delaware                                 
|Pacific Torrey Daycare Holdings, LP      |  | California                               
|Pacific Torrey Reserve West Assets, LLC  |  | Delaware                                 
|Pacific Torrey Reserve West Holdings, LP |  | California                               
|Pacific VC Holdings, LLC                 |  | Delaware                                 
|Pacific Waikiki Assets, LLC              |  | Delaware                                 
|Pacific Waikiki Holdings, LP.            |  | California                               
|Rancho Carmel Holdings, LLC              |  | Delaware                                 
|Rancho Carmel Plaza, LLC                 |  | Delaware                                 
|SB Corporate Centre III-IV, LLC          |  | Delaware                                 
|SB Corporate Centre, LLC                 |  | California                               
|SB Towne Centre, LLC                     |  | California                               
|SBCC Holdings, LLC                       |  | Delaware                                 
|SBTC Holdings, LLC                       |  | Delaware                                 
|Southbay Marketplace Holding, LLC        |  | Delaware                                 
|Vista Hacienda, LLC                      |  | Delaware                                 
|Waikele 101 Sorrento, LLC                |  | Delaware                                 
|Waikele 101 Stonecrest, LLC              |  | Delaware                                 
|Waikele 225 Sorrento, LLC                |  | Delaware                                 
|Waikele 225 Stonecrest, LLC              |  | Delaware                                 
|Waikele Reserve West Holdings, LLC       |  | Delaware                                 
|Waikele Venture Holdings, LLC            |  | Delaware                                 
|WBW Hotel Lessee, LLC                    |  | Delaware