---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-161663"
form_type: "8-K"
ticker: "TECX"
cik: "0001681087"
company_name: "Tectonic Therapeutic, Inc."
filed_at: "2024-06-14T23:59:59+00:00"
generated_at: "2026-06-01T04:21:02.546825+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# AVROBIO approves 1-for-12 reverse stock split; merger with Tectonic to close June 18

## Summary
- Reverse stock split at 1-for-12 ratio effective 4:00 pm ET on June 18, 2024.
- Merger with Tectonic anticipated to close on or around June 18, 2024.
- Common stock to trade on Nasdaq under ticker TECX starting June 20, 2024.
- Fractional shares cashed out based on closing price before the effective time.
- Outstanding equity awards under company plans adjusted proportionally.

## SEC filing metadata
- accession: 0001193125-24-161663
- form_type: 8-K
- ticker: TECX
- cik: 0001681087
- company_name: Tectonic Therapeutic, Inc.
- filed_at: 2024-06-14T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1681087/000119312524161663/0001193125-24-161663-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1681087/000119312524161663/d844856d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-161663
- JSON: https://secwatch.observer/filing/0001193125-24-161663.json
- Plain text: https://secwatch.observer/filing/0001193125-24-161663.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.