Tectonic Therapeutic Added to Russell 3000® Index

TECX
October 03, 2025

On June 30, 2025, Tectonic Therapeutic announced its addition to the broad-market Russell 3000® Index. This inclusion became effective after the open of US equity markets on Monday, June 30, 2025, following the conclusion of the 2025 Russell US Indexes annual reconstitution.

Membership in the Russell 3000® Index, which remains in place for one year, results in automatic inclusion in either the large-cap Russell 1000® Index or the small-cap Russell 2000® Index. It also includes the appropriate growth and value style indexes, based on market capitalization rankings and style attributes.

This addition is significant for Tectonic Therapeutic as it increases the company's exposure to institutional investors and index funds. Such inclusion can lead to greater liquidity and broader investor interest in the company's stock.

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