[5] On July 15, 2004, AspenTech was required by the Federal Trade Commission to make divestitures in regard to an anti-trust ruling against its acquisition of HyproTech.

[6] In the same year, a class action lawsuit was filed against Aspen Technology and its certain officers over issuance of misleading statements and improper revenue recognition.

[9] The company's former CEO, David McQuillin, was sentenced in 2007 to 6 months' house arrest and 3 years' probation after pleading guilty to falsifying revenue figures.

[20][21][22] In October 2022, Aspen Technology announced the acquisition of inmation Software GmbH based in Cologne, Germany to strengthen their data management functionality.

Examples of steps taken during this period included:[26][27] On April 30, 2013, AspenTech announced that Mark Fusco would retire as President & CEO effective September 30, 2013.