ANSYS Added to Russell 1000 Index

Tacoma, Washington-based Russell Investments realigns itsRussell 3000(R) Index once per year, tracking what it says is 99 percent of the U.S. equity market. That index is then broken down to 26 smaller indexes, including the widely watchedRussell 1000 Index of large-capitalization stocks and the Russell 2000(R) Index of small capitalization stocks. ANSYS had been listed on theRussell 2000 since 2001.

TheRussell 1000 Index includes approximately 1,000 of the largest securities based on a combination of their market cap and current index membership -- representing approximately 92 percent of the U.S. market. It is constructed to provide a comprehensive and unbiased barometer for the large-cap segment and is completely reconstituted annually to ensure new and growing equities are reflected.Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. An industry-leading $4.4 trillion in assets currently are benchmarked to them. These investment tools originated fromRussell's multi-manager investment business in the early 1980s when the company saw the need for a more objective, market-driven set of benchmarks in order to evaluate outside investment managers.

"TheRussell 1000 Index is one of a number of recent milestones that validate our long-term strategy and commitment to building shareholder value," said Jim Cashman, president and CEO, ANSYS, Inc. " We have focused an incredible amount of energy and resources into building a solid business model, which has enabled ANSYS to weather many ups and downs over the years. Our long-term dedication to the democratization of engineering simulation has resulted in consistent technology leadership, consistent growth and profitability, and a broad and diversified global presence. In fact, today 97 of the top 100 industrial companies on the FORTUNE Global 500 list are now using software from ANSYS to propel their product development cycles and drive innovation within their own teams."

Earlier in 2008, ANSYS was added to the Cleantech Group's Cleantech Index(TM) (Amex: ^CTIUS), which is the first and only stock market index intended to reflect the surging global demand for clean technology products and services. By tracking the market performance of the leading publicly traded cleantech companies, CTIUS is the industry standard index, offering an easy, cost-effective, and liquid means for investors and licensees, including the PowerShares Cleantech Portfolio (Amex: PZD), to access the broad cleantech investment category. ANSYS was chosen for its strong growth potential, technology, impact, sector representation, and leadership.

About Russell Investments

Russell Investments aims to improve financial security for people by providing strategic advice, world-class implementation, state-of-the-art performance benchmarks, and a range of institutional-quality investment products. With more than $213 billion in assets under management,Russell serves individual, institutional and advisor clients in more than 40 countries.Russell provides access to some of the world's best money managers. It helps investors put this access to work in corporate defined benefit and defined contribution plans, and in the life savings of individual investors. Headquartered inTacoma, Wash.,Russell has principal offices inAmsterdam, Auckland,Hong Kong,Johannesburg,London,Melbourne,New York,Paris,San Francisco,Seoul,Singapore,Sydney,Tokyo andToronto.

For more information onRussell indexes, go to www.russell.com.

About the Cleantech Group, LLC

The Cleantech Group pioneered the cleantech investment category in 2002. Today, it accelerates the development and market adoption of clean technologies globally through membership in the largest global network of investors and companies, representing more than $3 trillion in assets. Member investors, growth companies/vendors, enterprises, service providers, and others receive access to capital, investment opportunities, market leading research and data, insight, sales opportunities, human capital, and promotional opportunities. The Cleantech Group also produces the premier Cleantech Forum events worldwide. Details at: http://www.cleantech.com.

About ANSYS, Inc.

ANSYS, Inc., founded in 1970, develops and globally markets engineering simulation software and technologies widely used by engineers and designers across a broad spectrum of industries. The Company focuses on the development of open and flexible solutions that enable users to analyze designs directly on the desktop, providing a common platform for fast, efficient and cost-conscious product development, from design concept to final-stage testing and validation. The Company and its global network of channel partners provide sales, support and training for customers. Headquartered inCanonsburg, Pennsylvania, U.S.A., with more than 40 strategic sales locations throughout the world, ANSYS, Inc. and its subsidiaries employ approximately 1,400 people and distribute ANSYS products through a network of channel partners in over 40 countries. Visit www.ansys.com for more information.

ANSYS, ANSYS Workbench, AUTODYN, CFX, FLUENT and any and all ANSYS, Inc. brand, product, service and feature names, logos and slogans are registered trademarks or trademarks of ANSYS, Inc. or its subsidiaries inthe United States or other countries. All other brand, product, service and feature names or trademarks are the property of their respective owners.

SOURCE ANSYS, Inc.