Willdan Group, Inc. (NASDAQ: WLDN) today announced that it is set to join the broad-market Russell 3000 ® Index at the conclusion of the Russell US Indexes annual reconstitution, effective after the US market opens on June 26, according to a preliminary list of additions posted on June 9. Annual reconstitution of the Russell US indexes captures the 4,000 largest US stocks, ranking them by total market capitalization. Membership in the US all-cap Russell 3000 ® Index, which remains in place for one year, means automatic inclusion in the large-cap Russell 1000 ® Index or small-cap Russell 2000 ® Index as well as the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes by objective, market-capitalization rankings and style attributes. "We are very pleased to be added to the Russell indexes," said Tom Brisbin, Willdan's CEO. "The Russell indexes are widely followed within the investment community, and we believe our inclusion will positively impact the liquidity in our stock and lead to more awareness for our Company as an attractive investment." Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Approximately $8.4 trillion in assets are benchmarked against Russell's US indexes. Russell indexes are part of FTSE Russell, a leading global index provider. For more information on the Russell 3000 ® Index and the Russell indexes reconstitution, go to the "Russell Reconstitution" section on the FTSE Russell website. About Willdan Willdan provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States. The Company's service offerings span a broad set of complementary disciplines that include energy efficiency and sustainability, engineering and planning, financial and economic consulting, and national preparedness. Willdan provides integrated technical solutions to extend the reach and resources of its clients, and provides all services through its subsidiaries specialized in each segment. For additional information, visit Willdan's website at www.willdan.com. About FTSE Russell FTSE Russell is a leading global index provider creating and managing a wide range of indexes, data and analytic solutions to meet client needs across asset classes, style and strategies. Covering 98% of the investable market, FTSE Russell indexes offer a true picture of global markets, combined with the specialist knowledge gained from developing local benchmarks around the world.