Tectonic Therapeutic, INC Schedule 13G passive stakes

Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.

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TCG Crossover Funds and Chen Yu have disclosed a combined 6.2% beneficial ownership stake in Tectonic Therapeutic, Inc. common stock.
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Aberdeen Group plc and its subsidiary abrdn Inc. have reported a 6.10% beneficial ownership stake in Tectonic Therapeutic, Inc. as of December 31, 2025.
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EcoR1 Capital, LLC and its affiliates report 0% beneficial ownership in Tectonic Therapeutic, Inc. common stock.
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Deep Track Capital and its affiliates have reported zero beneficial ownership in Tectonic Therapeutic, Inc., indicating a complete divestment of their prior stake.
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EcoR1 Capital, LLC and its control person Oleg Nodelman have filed an amended Schedule 13G, disclosing a beneficial ownership of 5.0% in Tectonic Therapeutic, Inc.'s common stock as of March 31, 2025.
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FMR LLC and its affiliates, along with Abigail P. Johnson, have filed an amended Schedule 13G, disclosing a 15.0% beneficial ownership stake in Tectonic Therapeutic Inc. as of March 31, 2025.
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BML Investment Partners, L.P. has filed an amended Schedule 13G, indicating they no longer beneficially own any shares of Tectonic Therapeutic, Inc. as of December 31, 2024.
NASDAQ
Deep Track Capital, LP, along with Deep Track Biotechnology Master Fund, Ltd. and David Kroin, has disclosed a beneficial ownership of 7.6% in Tectonic Therapeutic Inc.'s common stock.
NASDAQ
FMR LLC and Abigail P. Johnson have disclosed a continued 10.3% passive ownership stake in TECTONIC THERAPEUTIC INC as of December 31, 2024, through an Amendment No. 2 to their Schedule 13G filing.