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Current Report · Items 8.01, 9.01 · 8-K

Tectonic Therapeutic, Inc.

TECXNASDAQEQUITYCurrent

Other Events

Item 8.01 Other Events. On September 29, 2026, Tectonic Therapeutic, Inc. issued a press release titled “Tectonic Therapeutic Announces Favorable Phase 1 Safety, Tolerability and PK Results for TX2100, a Novel Approach for the Treatment of Hereditary Hemorrhagic Telangiectasia (HHT)”.…

Filed Sep 29, 2026Accepted Sep 29, 2026, 5:19 PM EDTCIK 1681087Accession 0001193125-26-407823
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Company context

Tectonic Therapeutic is a clinical-stage biotechnology company focused on the discovery and development of therapeutic proteins and antibodies that modulate the activity of GPCRs. Leveraging its proprietary technology platform called GEODe™ (GPCRs Engineered for Optimal Discovery), Tectonic is focused on developing biologic medicines that overcome the existing challenges of GPCR-targeted drug discovery and harness the human body to modify the course of disease. Tectonic focuses on areas of significant unmet medical need, often where therapeutic options are poor or nonexistent, as these are areas where new medicines have the potential to improve patient quality of life. Tectonic is headquartered in Watertown, Massachusetts. For more information, please visit https://tectonictx.com/ and follow us on LinkedIn.

Current securities

Recent company filings

  1. 144 filingSep 30, 2026
  2. 10-Q filingAug 6, 2026
  3. Results of Operations and Financial ConditionAug 6, 2026
  4. Submission of Matters to a Vote of Security Holders · Other EventsJun 10, 2026
  5. 4 filingJun 10, 2026

Registered securities in this filing

Tectonic Therapeutic, Inc. · 8-K · Filed 2026-09-29

As filed in this accession. Current/historical status below comes from the governed listing record; the cover itself remains exact to this filing.

Common Stock, $0.0001 par value per share

Symbol
TECX
Exchange
NASDAQ
Classification
COMMON
Status
Current
Filing context

Context: duration_2026-09-29_to_2026-09-29

Dimensions: Not supplied

Accession 000119312526407823 · 1 registered-security cover member

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Disclosure sections

Items 8.01, 9.01

Select an item to read the extracted section. The as-filed document remains the primary evidence.

Item 8.01Item 8.01 - Other Events
Item 8.01 Other Events. On September 29, 2026, Tectonic Therapeutic, Inc. issued a press release titled “Tectonic Therapeutic Announces Favorable Phase 1 Safety, Tolerability and PK Results for TX2100, a Novel Approach for the Treatment of Hereditary Hemorrhagic Telangiectasia (HHT)”. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and, other than the quotes contained therein, is incorporated herein by reference.
Filed exhibits (1)
EX-99.1 (by filename) d20857dex991.htm

Exhibit 99.1 Tectonic Therapeutic Announces Favorable Phase 1 Safety, Tolerability and PK Results for TX2100, a Novel Approach for the Treatment of Hereditary Hemorrhagic Telangiectasia (HHT) U.S. FDA has granted Fast Track designation for TX2100 in HHT and cleared the Investigational New Drug (IND) application for the TX2100 Phase 1b clinical trial in HHT patients in the U.S. TX2100 Phase 1a clinical trial topline results demonstrated single ascending doses of TX2100 were generally safe and well-tolerated in healthy adult volunteers Company plans to initiate an open-label TX2100 Phase 1b clinical trial in patients with hematologic-support dependent HHT by year-end 2026, and initiate a Phase 2 clinical trial in parallel in patients with moderate-to-severe HHT in early 2027 WATERTOWN, Mass., Sept. 29, 2026 (GLOBE NEWSWIRE) - Tectonic Therapeutic, Inc. (NASDAQ: TECX) (“Tectonic” or the “Company”), a clinical stage biotechnology company focused on the discovery and development of therapeutic proteins and antibodies that modulate the activity of G-protein coupled receptors (GPCRs), today announced favorable topline results from its Phase 1a clinical trial evaluating …

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