System1 Set to Join Russell 2000® and Russell 3000® Indexes

System1, Inc. (NYSE: SST) (“System1” or the “Company”), an omnichannel customer acquisition marketing platform, is set to join the broad-market Russell 2000^® and Russell 3000^® Indexes at the conclusion of the 2022 Russell indexes annual reconstitution, effective after the U.S. market opens on June 27, 2022, according to a preliminary list of additions posted June 3, 2022.

Annual Russell indexes reconstitution captures the 4,000 largest U.S. stocks as of May 6, 2022, ranking them by total market capitalization. Membership in the U.S. all-cap Russell 3000^® Index, which remains in place for one year, means automatic inclusion in either 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.

Michael Blend, System1’s Chief Executive Officer and Co-Founder, stated, “We are very pleased to be included in the Russell indexes, marking another significant milestone for System1 in what has been a truly noteworthy and transformative year.”

Russell indexes are widely used by investment managers and institutional investors for inclusion in index funds and as benchmarks for active investment strategies. Approximately $12 trillion in assets under management are benchmarked against Russell’s U.S. indexes. Russell indexes are part of FTSE Russell, a leading global index provider.

For more information on the Russell 2000^® and Russell 3000^® Indexes and the Russell indexes reconstitution, go to the “Russell Reconstitution” section on the FTSE Russell website.

About System1, Inc.

System1 combines best-in-class technology & data science to operate its advanced Responsive Acquisition Marketing Platform (RAMP). System1’s RAMP is omnichannel and omnivertical, and built for a privacy-centric world. RAMP enables the building of powerful brands across multiple consumer verticals, the development & growth of a suite of privacy-focused products, and the delivery of high-intent customers to advertising partners. For more information, visit www.system1.com.

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 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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