EXHIBIT 21.1

Subsidiaries of the Registrant as of December 31, 2021	Jurisdiction of Incorporation
ANSYS Austria GmbH	Austria
Fluent China Holdings Limited	Barbados
ANSYS Belgium S.A.	Belgium
Livermore Software Technology LLC	California
ANSYS Canada Limited	Canada
ANSYS Lumerical Software ULC	Canada
2011767 Ontario, Inc.	Canada
ANSYS Technology (Shanghai) Co., Ltd.	China
OPTIS CN Limited	China
Zemax Optical Technology Consulting (Shanghai) Co., Ltd	China
Apache Science and Technology (Shanghai) Co. Ltd.	China
Fluent Software (Shanghai) Co., Limited	China
Ansys International LLC	Delaware
ANSYS Lumerical IP, LLC	Delaware
Zemax Europe Holdings LLC	Delaware
Zemax Taiwan, LLC	Delaware
Zemax, LLC	Delaware
ANSYS France SAS	France
ANSYS Germany GmbH	Germany
DYNARDO (Dynamic Software and Engineering) GmbH	Germany
Zemax Germany GmbH	Germany
ANSYS Hellas Single Member S.A.	Greece
OPTIS Hong Kong Limited	Hong Kong
ANSYS Software Private Limited	India
ANSYS Ireland Ltd.	Ireland
ANSYS Software, Ltd.	Israel
ANSYS Italia, S.r.l	Italy
ANSYS Japan K.K.	Japan
Zemax Japan K.K.	Japan
ANSYS Luxembourg Holding Company S.à.r.l.	Luxembourg
ANSYS Luxembourg S.à.r.l.	Luxembourg
Computational Engineering International, Inc.	North Carolina
Analytical Graphics, Inc.	Pennsylvania
Zillow TopCo, Inc.	Pennsylvania
ANSYS Poland s p.z.o.o	Poland
ANSYS OOO	Russia
ANSYS Singapore Pte. Ltd.	Singapore
Analytical Graphics Asia Pacific Private Ltd.	Singapore

ANSYS Korea LLC	South Korea
OPTIS Korea Co., Ltd.	South Korea
Virtual Motion LLC	South Korea
ANSYS Iberia, S.L.	Spain
ANSYS Sweden AB	Sweden
ANSYS Switzerland GmbH	Switzerland
desktop.studio GmbH	Switzerland
Matterhorn Merger Sub GmbH	Switzerland
Lumerical Taiwan Inc.	Taiwan
Taiwan ANSYS Technologies Co.	Taiwan
ANSYS UK Limited	United Kingdom
Granta Design Limited	United Kingdom
Zemax Europe Limited	United Kingdom
Phoenix Integration, Inc.	Virginia