Vanguard Capital Management LLC Reports New 5.23% Passive Stake in Tetra Tech Inc (TTEK)

On April 30, 2026, Vanguard Capital Management LLC filed a Schedule 13G with the SEC, reporting a new 5.23% ownership stake in Tetra Tech Inc (TTEK). As of the event date on March 31, 2026, the investment adviser beneficially owns 13,656,856 shares of common stock. The filing indicates that Vanguard holds sole dispositive power over all 13,656,856 shares, while maintaining sole voting power over 1,947,705 shares. No shared voting or dispositive power was reported. The securities were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. This filing reflects the aggregate holdings of Vanguard Capital Management LLC and several affiliates, including Vanguard Asset Management Limited and Vanguard Global Advisers, LLC. The position represents a significant increase from a previous ownership level of 0.0%, marking Vanguard's emergence as a major institutional shareholder in the Pasadena-based consulting and engineering services firm.