AMENDMENT NO. 1Purchase and Sale Agreement • March 15th, 2005 • Aspen Technology Inc /De/ • Services-computer programming services
Exhibit 10.1 Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. PURCHASE AND SALE AGREEMENTPurchase and Sale Agreement • March 15th, 2005 • Aspen Technology Inc /De/ • Services-computer programming services • New York
Exhibit 10.8 THIRD AMENDMENT TO NON-RECOURSE RECEIVABLES PURCHASE AGREEMENT This Third Amendment to Non-Recourse Receivables Purchase Agreement (this "Amendment") is entered into as of December 31, 2004, by and between SILICON VALLEY BANK, a...Non-Recourse Receivables Purchase Agreement • March 15th, 2005 • Aspen Technology Inc /De/ • Services-computer programming services
Exhibit 10.5 Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. HYPROTECH CANADA LICENSE AGREEMENT THIS HYPROTECH LICENSE AGREEMENT (the "AGREEMENT") is made and entered into as...License Agreement • March 15th, 2005 • Aspen Technology Inc /De/ • Services-computer programming services • New York
EXHIBIT 10.3 Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. ASPEN TECHNOLOGY LICENSE AGREEMENT THIS HYPROTECH LICENSE AGREEMENT (the "AGREEMENT") is made and entered into as...License Agreement • March 15th, 2005 • Aspen Technology Inc /De/ • Services-computer programming services • New York
Exhibit 10.6 Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. HYPROTECH UK LICENSE AGREEMENT THIS HYPROTECH LICENSE AGREEMENT (the "AGREEMENT") is made and entered into as of...Hyprotech License Agreement • March 15th, 2005 • Aspen Technology Inc /De/ • Services-computer programming services • New York
