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Tectonic Therapeutic, Inc.

For the period ended Jun 30, 2025. Filed Aug 7, 2025.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2025 · Filed Aug 7, 2025

TECX$20.64+6.3%Stored close · as of Nov 6, 2026

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Other Information

Item 5. Other Information.

Rule 10b5-1 Trading Arrangements

During the three months ended June 30, 2025, the following officers of the Company adopted a “Rule 10b5-1 trading arrangement” as that term is defined in Item 408(a) of Regulation S-K, all of which were entered into during an open trading window in accordance with the Company’s Insider Trading Policy and all of which were intended to satisfy Rule 10b5-1(c):

On April 8, 2025, Marcella K. Ruddy, our Chief Medical Officer, adopteda Rule 10b5-1 trading plan that provides for the sale of up to 31,065 shares of common stock settled from outstanding RSUs. The plan will expire on May 29, 2026, subject to early termination for certain specified events set forth in the plan.

Except as set forth above, no director or officer of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-rule 10b5-1 trading arrangement,” as each term is defined in item 408(a) of Regulation S-K, during the three months ended June 30, 2025.

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