0001681087 2026-02-23 2026-02-23 false 0001681087 8-K 2026-02-23 Tectonic Therapeutic, Inc. DE 001-38537 81-0710585 490 Arsenal Way Suite 200 Watertown MA 02472 (339) 666-3320 false false false false Common Stock, $0.0001 par value per share TECX NASDAQ false