SCHEDULE: EcoR1 Capital Divests Tectonic Therapeutic Stake

Sentiment:

Beneficial Ownership Change 14 November 2025 4:17 PM

📋All filings for Tectonic Therapeutic, INC

EcoR1 Capital, LLC and its affiliates report 0% beneficial ownership in Tectonic Therapeutic, Inc. common stock.

Worse than expectedEcoR1 Capital, LLC and its affiliates have reduced their beneficial ownership in Tectonic Therapeutic, Inc. to 0%, indicating a complete divestment of their stake, which can be perceived as a negative signal.

Summary

EcoR1 Capital, LLC, Oleg Nodelman, and EcoR1 Capital Fund Qualified, L.P. have filed an Amendment No. 2 to Schedule 13G regarding their holdings in Tectonic Therapeutic, Inc.
As of September 30, 2025, the reporting persons beneficially own 0.00 shares of Tectonic Therapeutic, Inc. common stock.
This represents 0% of the class of securities.
The reporting persons disclaim beneficial ownership of the securities reported, except to the extent of their pecuniary interest therein.
EcoR1 Capital, LLC acts as the general partner and investment adviser for investment funds, including Qualified Fund, and Oleg Nodelman is the control person of EcoR1.

Sentiment

Score: 3

Explanation: The complete divestment by a significant investment firm, even if passive, could be perceived negatively by the market, suggesting a lack of confidence or a reallocation of capital away from the issuer.

Negatives

EcoR1 Capital, LLC, Oleg Nodelman, and EcoR1 Capital Fund Qualified, L.P. no longer hold any beneficial ownership (0%) in Tectonic Therapeutic, Inc., indicating a complete divestment of their stake.

Future Outlook

Industry Context

This filing reflects a change in a passive investment stake by a specific investment firm, EcoR1 Capital, in Tectonic Therapeutic, Inc. It does not provide broader industry trends or competitive analysis for the issuer.

Stakeholder Impact

Shareholders may view the complete divestment by EcoR1 Capital as a negative signal, potentially impacting investor confidence and the stock price.

Key Dates

Date	Description
09/30/2025	Date of event which requires filing of this statement, indicating the reporting persons' beneficial ownership became 0%.
11/14/2025	Date of filing of this Schedule 13G Amendment.

Recommendation

sell

The complete divestment by EcoR1 Capital, a notable investment firm, signals a lack of conviction or a strategic exit from Tectonic Therapeutic, Inc. This action, even if passive, could lead to negative market sentiment and downward pressure on the stock price. Investors might interpret this as a cue to re-evaluate their own positions.

Keywords

Tectonic Therapeutic, EcoR1 Capital, Oleg Nodelman, Schedule 13G, Beneficial Ownership, Divestment, Common Stock

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