Hub Annual Report 2019. “AspenTech delivered strong second quarter results, highlighted by annual spend growth of 9.4% year-over-year. Non-GAAP income from operations, was $122.9 million for the fourth quarter of fiscal 2020, compared to non-GAAP income from operations of $119.9 million in the same period last fiscal year. None of these non-GAAP metrics should be considered as an alternative to any measure of financial performance calculated in accordance with GAAP.Aspen Technology will host a conference call and webcast today, August 7, and clicking on the “webcast” link. San Francisco, CA – We are pleased to release our 2019 Annual Report, which reviews the Hub’s accomplishments from our first year and identifies our short- and long-term goals for what lies ahead. Accordingly, a reconciliation for forward-looking non-GAAP total expenses, non-GAAP operating income and non-GAAP net income per share is not available without unreasonable effort.

Exhibit Exhibit 99.1 Contacts: Media Contact Investor Contact David Grip Brian Denyeau AspenTech ICR +1 781-221-5273 +1 646-277-1251 [email protected] [email protected] Aspen Technology Provides Additional Details Relating to Filing of Form 12b-25 for Annual Report for Fiscal Year 2019 Bedford, Mass. The Company's purpose-built software platform automates knowledge work and builds sustainable competitive advantage by delivering high returns over the entire asset lifecycle. :  AspenTech is in the process of completing its final documentation under FASB Topic 606 (Revenue from Contracts with Customers) in connection with its Annual Report on Form 10-K, which it expects to file on time later this month. For the fiscal year ended June 30, 2020, AspenTech reported income from operations of $248.8 million, compared to income from operations of $282.8 million for fiscal year 2019. AspenTech expressly disclaims any obligation to update forward-looking statements after the date of this press release.© 2019 Aspen Technology, Inc. AspenTech, aspenONE, asset optimization and the Aspen leaf logo are trademarks of Aspen Technology, Inc. All rights reserved. Accordingly, management utilizes a number of non-GAAP and other business metrics, including the non-GAAP metrics set forth in this press release, to track Aspen Technology’s business performance. We are inspired by how the Hub has … Bedford, Mass.

Non-GAAP financial measures should be considered in addition to, not as a substitute for or superior to, financial measures determined in accordance with GAAP. Summary Toggle Aspen Technology … Summary Toggle Aspen Technology Provides Additional Details Relating to Filing of Form 12b-25 for Annual Report for Fiscal Year 2019: 08/07/19. For the fiscal year ended June 30, 2020, the company generated $243.3 million in cash flow from operations and $243.1 million in free cash flow. The second and third paragraphs of this press release as well as the Business Outlook section contain forward-looking statements for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Free cash flow is calculated as net cash provided by operating activities adjusted for the net impact of: purchases of property, equipment and leasehold improvements; capitalized computer software development costs, and other nonrecurring items, such as acquisition related payments.AspenTech’s total revenue of $598.3 million increased 15% from $518.9 million for fiscal year 2018. was $28.8 million, compared to $31.2 million for fiscal year 2018. was $404.1 million, an increase from $326.5 million for fiscal year 2018. was $165.4 million, an increase from $161.1 million for fiscal year 2018.For the fiscal year ended June 30, 2019, AspenTech reported income from operations of $282.8 million, compared to income from operations of $219.2 million for fiscal year 2018.Net income was $262.7 million for the fiscal year ended June 30, 2019, leading to net income per share of $3.71, compared to net income per share of $4.03 for fiscal year 2018. Shares used in computing Non-GAAP diluted income per share The Company will file the Annual Report as soon as practicable and continues to expect to file by September 13, 2019, the fifteenth calendar day following the prescribed due date of the Annual Report.Aspen Technology (“AspenTech”) is a leading software supplier for optimizing asset performance. Modeled after tech incubators like Y Combinator, we take tech experts, teach them the policy process through an in-residence fellow-ship program in the Bay Area, and encourage them to … Our results reflect positive contributions across all areas of the business, including meaningful improvement in Engineering, continued strength in MSC and substantial growth from APM,” said Antonio Pietri, President and Chief Executive Officer of AspenTech.Pietri continued, “We enter fiscal year 2020 performing at a high level and are benefitting from a positive demand environment driven by a secular technology investment cycle in the process and other capital intensive industries. All other trademarks are property of their respective owners. Purchase of property, equipment and leasehold improvements Visit AspenTech.com to find out more. Summary of Fourth Quarter Fiscal Year 2019 Financial Results AspenTech’s total revenue of $195.8 million included: License revenue, which represents the portion of a term license agreement allocated to the initial license, was $148.5 million in the fourth quarter of fiscal 2019, compared to $111.6 million in the fourth quarter of fiscal 2018.