Exhibit 21.1

LIST OF SUBSIDIARIES OF THE REGISTRANT

Name of Subsidiary	State or Other Jurisdiction of Incorporation or Organization
FireEye Software (Shanghai) Company Limited	China
Intrigue, LLC	Delaware
iSIGHT Partners Europe Holdings B.V.	Netherlands
iSIGHT Partners Ukraine LLC	Ukraine
iSIGHT Risk Management Private Limited	India
iSIGHT Security, LLC	Delaware
Mandiant, LLC	Delaware
Mandiant Australia Pty Ltd	Australia
Mandiant Arabia for Cyber Security	Kingdom of Saudi Arabia
Mandiant Canada Limited	British Columbia
Mandiant Cybersecurity Mexico S.A. de C.V.	Mexico
Mandiant Cybersecurity Private Limited	India
Mandiant Deutschland GmbH	Germany
Mandiant Hong Kong Limited	Hong Kong
Mandiant International, LLC	Delaware
Mandiant Ireland Limited	Ireland
Mandiant Israel Ltd	Israel
Mandiant Italy SrL	Italy
Mandiant K.K.	Japan
Mandiant Korea Limited	Republic of Korea

Mandiant Netherlands B.V.	Netherlands
Mandiant Philippines Corporation	Philippines
Mandiant Singapore Private Limited	Singapore
Mandiant Spain, S.L.	Spain
Mandiant Sweden Aktiebolag	Sweden
Mandiant Taiwan Ltd.	Taiwan
Mandiant Technologies Malaysia SDN BHD	Malaysia
Mandiant UK Ltd.	United Kingdom
Respond Software, LLC	Delaware