SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 -------------------- FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2002 ASPEN TECHNOLOGY, INC. (Exact name of registrant as specified in its charter) DELAWARE 0-24786 04-2739697 - -------------------------------------------------------------------------------- (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification No.) Ten Canal Park, Cambridge, Massachusetts 02141 ---------------------------------------------- (Address of principal executive office and zip code) (617) 949-1000 -------------- (Registrant's telephone number, including area code) --------------

ITEM 5. OTHER EVENTS. We recently entered into agreements to amend, effective as of August 16, 2002, several of the existing terms of our strategic alliance with Accenture. This alliance is the subject of a current report on Form 8-K dated February 6, 2002, which we filed with the SEC on February 12, 2002. Under the initial alliance arrangements, we issued 1,641,672 shares of common stock to Accenture on June 9, 2002 in payment of license fees for certain intellectual property. In accordance with these arrangements, we were to pay additional license fees of $11.1 million to Accenture on August 30, 2002. These fees were payable either in cash or by delivery of shares of common stock with a market value of $11.1 million, based on then-current market prices of our common stock. Under the recent amendments, we and Accenture agreed that, among other things, we would pay the $11.1 million of licensing fees in a series of cash installments, rather than by a single cash payment or issuance of common stock on August 30, 2002. We paid $1.1 million of this amount in August 2002 and are obligated to pay the remaining $10.0 million in installments due from November 2002 through July 2003. The unpaid balance of this obligation accrues interest at the rate of 1.5% per month and is secured by a pledge of our patents and software. We have agreed either to replace this collateral with a letter of credit that would be issued under a new credit facility or to pledge a portion of our accounts receivable to Accenture as additional security for the unpaid balance of the amount owed to Accenture. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (a) Financial Statements of Business Acquired Not applicable. (b) Pro Forma Financial Information Not applicable. (c) Exhibits EXHIBIT NUMBER DESCRIPTION ------- ----------- 10.1 Security Agreement, effective as of August 31, 2002, by and between Accenture LLP and Aspen Technology, Inc. 2

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ASPEN TECHNOLOGY, INC. Dated: September 9, 2002 By: /s/ LISA W. ZAPPALA ------------------------------ Lisa W. Zappala Senior Vice President and Chief Financial Officer 3

EXHIBIT 10.1 SECURITY AGREEMENT This Security Agreement ("Agreement") is entered into effective as of August 16, 2002 ("Effective Date") by and between Accenture LLP, an Illinois general partnership registered as a limited liability partnership with an office at 100 Peachtree Street, N.E., Suite 1300 Atlanta, Georgia 30303 ("Accenture") and Aspen Technology, Inc., a Delaware corporation with an office at Ten Canal Park, Cambridge, Massachusetts 02141 ("AspenTech"). As used in this Amendment, a "Party" may refer to either Accenture or AspenTech, and "Parties" refers to both Accenture and AspenTech. WHEREAS, the Parties have previously entered into the Stock Issuance Agreement for License Fees dated as of February 8, 2002 by and between the Parties ("License Fee Agreement"), as amended, in which AspenTech agreed to obtain certain developed products from Accenture and Accenture agreed to provide such developed products on the terms set forth therein; WHEREAS, pursuant to Section 1.3(b) of the License Fee Agreement, AspenTech may elect to pay Accenture a total principal balance of $11,100,000.00 ("Principal Amount") plus interest according to a schedule and terms as set forth in the License Fee Agreement; WHEREAS, the Parties have agreed and entered into amendments of even date herewith to the Stock Issuance Agreement for License Fees, the Development Agreement and Change Order, and the License Agreement (together the "Amended Agreements"); WHEREAS, AspenTech desires to secure its obligations to repay the Principal Amount plus interest pursuant to terms set forth in the License Fee Agreement by granting liens on certain collateral as set forth in this Agreement; and FOR AND IN CONSIDERATION OF the premises and mutual agreements in the License Fee Agreement as amended and herein, Accenture and AspenTech agree as follows: 1. In order to secure the full and prompt repayment of the Principal Amount, or any unpaid portion thereof, plus interest ("Outstanding Debt"), AspenTech hereby shall grant to Accenture a lien on and security interest in the collateral set forth in Exhibit A hereto ("Initial Collateral"); 2. AspenTech shall use its good faith and best efforts to secure a line of credit for an amount in excess of the Outstanding Debt for its general business purposes from a qualified lending institution or private lender ("Lender's Line of Credit") and, in the event of and upon establishment of such Lender's Line of Credit prior to the expiration of this Agreement, AspenTech shall use best commercially reasonable efforts to immediately issue a letter of credit to Accenture in the amount of the Outstanding Debt ("Accenture Letter of Credit"), which shall thereafter replace the Initial Collateral such that the Outstanding Debt shall be thereafter secured by the Accenture Letter of Credit; 3. If AspenTech has not established such Lender's Line of Credit by December 31, 2002, then AspenTech shall grant to Accenture, on a first priority basis, a lien and security interest in its accounts receivables in such amount equal to 2 times of the Outstanding Debt, which shall thereafter replace the Initial Collateral such that the Outstanding Debt shall be thereafter secured by the aforementioned amount of accounts receivables; 4. As long as the Principal Amount plus interest shall remain outstanding and this Agreement has not terminated, Accenture shall have the exclusive right, upon default by AspenTech of the material provisions of the Amended Agreements, to enforce the provisions of this Agreement and exercise remedies hereunder in such manner as it may determine is 1

reasonable, including without limitation, the rights to take possession, sell or otherwise dispose of the Initial Collateral or its subsequent replacement, to incur expenses with respect to such possession, sale or disposition and to exercise all rights and remedies as a secured lender under the Uniform Commercial Code of any applicable jurisdiction; and 5. This Agreement shall terminate upon full and final payment of the Principal Amount plus interest according to the terms set forth in the License Fee Agreement. IN WITNESS WHEREOF, the Parties hereto have executed this Agreement as of the Effective Date above. ACCENTURE LLP ASPEN TECHNOLOGY, INC. By: /s/ DAVID A. CROW By: /s/ MARY A. PALERMO ----------------------------- ------------------------------- (Authorized Signature) (Authorized Signature) Name: David A. Crow Name: Mary A. Palermo ---------------------------- ----------------------------- (Printed or Typed) (Printed or Typed) Title: Partner Title: Co-Chief Operating Officer --------------------------- --------------------------- (Printed or Typed) 2

Exhibit A Patents and software (including source code, object code, manuals, upgrades, releases, and enhancements) wholly-owned by AspenTech subject however to liens and encumbrances outstanding on the date hereof, if any, customer licensees, third-party royalty agreements, software escrow agreements, and any and all other agreements entered into in the ordinary course of business. 3