EXHIBIT 99.1 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT dated as of June 15, 2001 is entered into between Aspen Technology, Inc., a Delaware corporation ("Aspen"), and the several persons and entities identified as "Stockholders"...Registration Rights Agreement • June 15th, 2001 • Aspen Technology Inc /De/ • Services-computer programming services • Massachusetts
EXHIBIT 99.2 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT dated as of June 15, 2001 is entered into between Aspen Technology, Inc., a Delaware corporation ("Aspen"), and Michael B. Feldman (the "Shareholder"). PRELIMINARY STATEMENT...Registration Rights Agreement • June 15th, 2001 • Aspen Technology Inc /De/ • Services-computer programming services • Massachusetts
