---
schema_version: "secwatch.filing_event.v1"
accession: "0001728117-26-000085"
form_type: "8-K"
ticker: "GOSS"
cik: "0001728117"
company_name: "Gossamer Bio, Inc."
filed_at: "2026-09-03T20:02:25+00:00"
generated_at: "2026-09-03T20:03:03.388045+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Gossamer Bio amends bylaws to lower stockholder quorum to one-third

## Summary
- Board approved amended and restated bylaws effective September 3, 2026.
- Quorum reduced from majority to one-third (1/3) of voting power of outstanding capital stock.
- Change applies to all stockholder meetings unless law, charter, or bylaws require otherwise.
- Full text of amended bylaws filed as Exhibit 3.1.

## SEC filing metadata
- accession: 0001728117-26-000085
- form_type: 8-K
- ticker: GOSS
- cik: 0001728117
- company_name: Gossamer Bio, Inc.
- filed_at: 2026-09-03T20:02:25+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1728117/000172811726000085/0001728117-26-000085-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1728117/000172811726000085/goss-20260903.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001728117-26-000085
- JSON: https://secwatch.observer/filing/0001728117-26-000085.json
- Plain text: https://secwatch.observer/filing/0001728117-26-000085.txt

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