Amprius Set to Join Russell 3000® Index

Amprius Technologies, Inc. ("Amprius" or the “Company”) (NYSE: AMPX), a leader in next-generation lithium-ion batteries with its Silicon Anode Platform, is set to join the broad-market Russell 3000® Index at the conclusion of the 2023 Russell indexes annual reconstitution, effective after the US market opens on June 26, according to a preliminary list of additions posted last month.

Annual Russell indexes reconstitution captures the 4,000 largest US stocks as of April 28, 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 primarily by objective, market-capitalization rankings, and style attributes.

“The Russell Indexes are a well-respected and influential benchmarking standard, and our inclusion into the Russell 3000® Index represents a meaningful achievement for Amprius,” said CEO Dr. Kang Sun. “Since entering the public markets last September, we have continued delivering breakthrough products to customers and scaling our production capacity. We expect our inclusion in this select group to bring increased exposure to the broader investment community as we strive to deliver long-term value to our shareholders.”

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Approximately $12.1 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, please visit the “Russell Reconstitution” section on the FTSE Russell website.

About Amprius Technologies, Inc.

Amprius Technologies, Inc. is a leading manufacturer of high-energy and high-power lithium-ion batteries producing the industry’s highest known energy density cells. The company’s commercially available batteries deliver up to 450 Wh/kg and 1,150 Wh/L. The company’s corporate headquarters is in Fremont, California where it maintains an R&D lab and a pilot manufacturing facility for the fabrication of silicon anodes and cells. To serve customer demand, Amprius recently entered into a lease agreement for an approximately 774,000 square foot facility in Brighton, Colorado. For additional information, please visit amprius.com. Also, see the company’s LinkedIn and Twitter pages.

About FTSE Russell

FTSE Russell is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. FTSE Russell calculates thousands of indexes that measure and benchmark markets and asset classes in more than 70 countries, covering 98% of the investable market globally.

FTSE Russell index expertise and products are used extensively by institutional and retail investors globally. Approximately $20.1 trillion is currently benchmarked to FTSE Russell indexes. For over 30 years, leading asset owners, asset managers, ETF providers and investment banks have chosen FTSE Russell indexes to benchmark their investment performance and create ETFs, structured products and index-based derivatives.

A core set of universal principles guides FTSE Russell index design and management: a transparent rules-based methodology is informed by independent committees of leading market participants. FTSE Russell is focused on applying the highest industry standards in index design and governance and embraces the IOSCO Principles. FTSE Russell is also focused on index innovation and customer partnerships as it seeks to enhance the breadth, depth and reach of its offering.

FTSE Russell is wholly owned by London Stock Exchange Group. For more information, visit www.ftserussell.com.

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