---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-153749"
form_type: "8-K"
ticker: "TECX"
cik: "0001681087"
company_name: "Tectonic Therapeutic, Inc."
filed_at: "2024-06-04T23:59:59+00:00"
generated_at: "2026-06-01T06:33:33.881914+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# AVROBIO voluntarily supplements merger disclosures as three shareholder suits challenge deal

## Summary
- Three shareholder lawsuits filed in NY state and federal court allege Registration Statement omissions; seek to enjoin merger.
- Eleven demand letters also received; AVROBIO denies wrongdoing but voluntarily adds supplemental disclosures.
- Supplemental disclosures include revised background of the merger and updated Houlihan Lokey financial analysis tables.
- Special stockholder meeting to approve merger with Tectonic scheduled for June 11, 2024.
- Company maintains lawsuits are without merit and that existing disclosures comply with law.

## SEC filing metadata
- accession: 0001193125-24-153749
- form_type: 8-K
- ticker: TECX
- cik: 0001681087
- company_name: Tectonic Therapeutic, Inc.
- filed_at: 2024-06-04T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1681087/000119312524153749/0001193125-24-153749-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1681087/000119312524153749/d825208d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-153749
- JSON: https://secwatch.observer/filing/0001193125-24-153749.json
- Plain text: https://secwatch.observer/filing/0001193125-24-153749.txt

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