ANSYS, Inc. (NasdaqGS:ANSS) is weighing options, including a sale, after getting takeover interest, according to people familiar with the matter. The stock rose as much as 20%. The Canonsburg, Pennsylvania-based company is working with advisers, said the people, who asked to not be identified discussing private information.

No final decision has been made and Ansys could opt to remain independent, the people added.