*The Company's operating cash flow guidance reflects an adverse impact of approximately $20.0 million related to the acceleration of income tax payments associated with deferred revenue and backlog credited to retained earnings and never recognized as revenue in the financial statements.

ACV is comprised of the following:

• the annualized value of maintenance and lease contracts with start dates or anniversary dates during the period, plus
• the value of perpetual license contracts with start dates during the period, plus
• the value of services contracts completed during the period and expected to be fulfilled over the next 12 months.

Conference Call Information

ANSYS will hold a conference call at 8:30 a.m. Eastern Time on February 22, 2018 to discuss fourth quarter results. The Company will provide its prepared remarks on the Company’s investor relations homepage and as an exhibit in its Form 8-K in advance of the call to provide shareholders and analysts with additional time and detail for analyzing its results in preparation for the conference call. The prepared remarks will not be read on the call and only brief remarks will be made prior to the Q&A session.

To participate in the live conference call, dial 855-239-2942 (US) or 412-542-4124 (Canada & Int’l). The call will be recorded and a replay will be available within two hours after the call. The replay will be available by dialing (877) 344-7529 (US), (855) 669-9658 (Canada) or (412) 317-0088 (Int’l) and entering the passcode 10116584. The archived webcast can be accessed, along with other financial information, on ANSYS' website at http://investors.ansys.com/events-and-presentations/events.aspx.