Exhibit 21.1

CRAY INC.

PARENT & SUBSIDIARIES LIST



|                                                 |  |             |          |  |               |                       |            |  |        |  
|------------------------------------------------ |  | ----------- | -------- |  | ------------- | --------------------- | ---------- |  | ------ | -
|Parent /Subsidiary Name                          |  | Date Formed |          |  | Country/State |                       | %Ownership | 
|Cray Inc.                                        |  |             | 12/07/87 |  |               | U.S./Washington State |            |  | Parent |  
|Cray Australia Pty Ltd.                          |  |             | 03/23/00 |  |               | Australia             |            |  | 100    | %
|Cray Brazil, Inc.                                |  |             | 08/25/00 |  |               | U.S./Washington State |            |  | 100    | %
|Cray Computadores do Brasil Ltda.                |  |             | 12/21/00 |  |               | Brazil                |            |  | 100    | %
|Cray Canada Corporation                          |  |             | 10/31/06 |  |               | Canada                |            |  | 100    | %
|Cray China Limited                               |  |             | 08/07/00 |  |               | China                 |            |  | 100    | %
|Cray Computer Finland Oy                         |  |             | 06/20/00 |  |               | Finland               |            |  | 100    | %
|Cray Computer SAS                                |  |             | 04/03/00 |  |               | France                |            |  | 100    | %
|Cray Computer Deutschland GmbH                   |  |             | 03/31/00 |  |               | Germany               |            |  | 100    | %
|Cray Supercomputers (India) Private Limited      |  |             | 09/30/08 |  |               | India                 |            |  | 100    | %
|Cray Supercomputers (Israel) Ltd.                |  |             | 09/16/01 |  |               | Israel                |            |  | 100    | %
|Cray Italy S.r.l.                                |  |             | 07/12/00 |  |               | Italy                 |            |  | 100    | %
|Cray Japan, Inc.                                 |  |             | 03/17/00 |  |               | U.S./Washington State |            |  | 100    | %
|Cray Korea, Inc.                                 |  |             | 03/17/00 |  |               | U.S./Washington State |            |  | 100    | %
|Cray Netherlands B.V.                            |  |             | 06/23/00 |  |               | Netherlands           |            |  | 100    | %
|Cray Computer South Africa (Proprietary) Limited |  |             | 02/23/00 |  |               | South Africa          |            |  | 100    | %
|Cray Computer Spain, S.L.                        |  |             | 03/30/00 |  |               | Spain                 |            |  | 100    | %
|Cray-Tera Sweden AB                              |  |             | 08/18/00 |  |               | Sweden                |            |  | 100    | %
|Cray Computer GmbH                               |  |             | 04/05/00 |  |               | Switzerland           |            |  | 100    | %
|Cray Taiwan, Inc.                                |  |             | 04/05/01 |  |               | U.S./Washington State |            |  | 100    | %
|Cray U.K. Limited                                |  |             | 03/07/00 |  |               | United Kingdom        |            |  | 100    | %