Exhibit 99.1 AMENDED AND RESTATED SECURITIES PURCHASE AGREEMENT This Amended and Restated Securities Purchase Agreement (this "Agreement") is dated as of March 19, 2002, among Aspen Technology, Inc., a Delaware corporation (the "Company"), and the...Securities Purchase Agreement • March 20th, 2002 • Aspen Technology Inc /De/ • Services-computer programming services • New York
Exhibit 99.2 AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT This Amended and Restated Registration Rights Agreement (this "AGREEMENT") is made and entered into as of March 19, 2002, among Aspen Technology, Inc., a Delaware corporation (the...Registration Rights Agreement • March 20th, 2002 • Aspen Technology Inc /De/ • Services-computer programming services • New York
EXHIBIT 99.8 AMENDMENT AGREEMENT NO. 4 TO CREDIT AGREEMENT This AMENDMENT AGREEMENT NO. 4 (this "Amendment"), made effective as of March 19, 2002, by and between ASPEN TECHNOLOGY, a Delaware corporation ("Borrower") and FLEET NATIONAL BANK, a national...Agreement • March 20th, 2002 • Aspen Technology Inc /De/ • Services-computer programming services • Massachusetts
AMENDMENT NO. 1 TO WARRANT NO. __ OF ASPEN TECHNOLOGY, INC.Aspen Technology Inc /De/ • March 20th, 2002 • Services-computer programming services
