Hyperion Denies Wrongdoing

Hyperion (Nasdaq:HYSL), the global leader in Business Performance Management software, has announced that it will vigorously defend itself against all patent infringement and other claims made by HyperRoll in a lawsuit filed in U.S. District Court on January 18, 2005. Hyperion said it has not infringed nor misappropriated any of HyperRoll's patents or other intellectual property.

HyperRoll's lawsuit follows statements it made to Hyperion last year in which it threatened to sue Hyperion for patent infringement. Proactively responding to those threats, Hyperion filed a declaratory judgment action in Federal District Court for the Northern District of California against HyperRoll on November 30, 2004. Hyperion's declaratory judgment action will establish that Hyperion has not infringed any of HyperRoll's patents.

"Based on our review of HyperRoll's allegations, our team believes that HyperRoll's claims are without merit," said Godfrey R. Sullivan, Hyperion's president and chief executive officer. "We are committed to protecting our own intellectual property and maximizing the benefits of our technology for our customers, partners, and shareholders. We will vigorously defend ourselves."

Forward-Looking Statements

Statements in this press release other than statements of historical fact are forward-looking statements, including, but not limited to, statements concerning anticipated outcomes of current or potential litigation, expected future financial results, and the potential success of anticipated product offerings. Such statements constitute anticipated outcomes and do not assure results. Actual results may differ materially from those anticipated by the forward-looking statements due to a variety of factors, including, but not limited to the actual outcomes of current or potential litigation, the company's failure to increase revenue, significant product quality problems, the impact of competitive products and pricing, a decline in customer demand, and technological shifts. For a more detailed discussion of factors that could affect the company's performance and cause actual results to differ materially from those anticipated in the forward-looking statements, interested parties should review the company's filings with the Securities and Exchange Commission, including the Annual Report on Form 10-K filed on September 13, 2004. The company does not undertake an obligation to update its forward-looking statements to reflect future events or circumstances.

"Hyperion," the Hyperion "H" logo and Hyperion's product names are trademarks of Hyperion. References to other companies and their products use trademarks owned by the respective companies and are for reference purpose only.

Contacts

Hyperion
Linda Snyder, 408-588-8405 (Investors)
Linda_snyder@hyperion.com
Robert Schettino, 408-588-8179 (Media)
Robert_schettino@hyperion.com