CuriosityStream Inc. (NASDAQ: CURI), a global factual entertainment media company, announced it expects to join the Russell 3000® Index, and based on current qualification metrics, also the Russell 2000® Index, at the conclusion of the 2025 Russell indexes annual reconstitution. The addition is expected to take effect at the opening of US equity markets on June 30, according to a preliminary list of additions posted on May 23.

Annual Russell indexes reconstitution captures the 4,000 largest US stocks as of April 30, 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.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Approximately $10.6 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 2000® Index and the Russell indexes reconstitution, go to the “Russell Reconstitution” section on the FTSE Russell website.

About CuriosityStream Inc.

CuriosityStream Inc. is the entertainment brand for people who want to know more. The global media company is home to award-winning original and curated factual films, shows, and series covering science, nature, history, technology, society, and lifestyle. With millions of subscribers worldwide and thousands of titles, the company operates the flagship Curiosity Stream SVOD service, available in more than 175 countries worldwide; Curiosity Channel, the linear television channel available via global distribution partners; Curiosity University, featuring talks from the best professors at the world's most renowned universities as well as courses, short and long-form videos, and podcasts; Curiosity Now, Curiosity Explora, and other free, ad-supported channels; Curiosity Audio Network, with original content and podcasts; and Curiosity Studios, which oversees original programming. For more information, visit CuriosityStream.com.

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