---
schema_version: "secwatch.filing_event.v1"
accession: "0001728117-26-000054"
form_type: "8-K"
ticker: "GOSS"
cik: "0001728117"
company_name: "Gossamer Bio, Inc."
filed_at: "2026-06-17T12:01:14+00:00"
generated_at: "2026-06-17T12:05:48.340461+00:00"
event_type: "debt"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Gossamer Bio completes exchange of 94.5% of 2027 notes; $18.9M remain outstanding

## Summary
- $181.1M principal (94.5%) of 5% 2027 notes tendered; exchanged for new 7.5% 2030 notes and equity.
- Company lowered tender condition from 98% to 90.5% after sufficient early participation by June 2.
- Early settlement occurred June 4; supplemental indenture eliminated restrictive covenants.
- No additional notes tendered after early date; $18.9M of existing notes remain outstanding.
- New 7.5% secured first lien notes due 2030, plus up to 317.6M shares or prefunded warrants issued.

## SEC filing metadata
- accession: 0001728117-26-000054
- form_type: 8-K
- ticker: GOSS
- cik: 0001728117
- company_name: Gossamer Bio, Inc.
- filed_at: 2026-06-17T12:01:14+00:00
- event_type: debt
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1728117/000172811726000054/0001728117-26-000054-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1728117/000172811726000054/goss-20260617.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001728117-26-000054
- JSON: https://secwatch.observer/filing/0001728117-26-000054.json
- Plain text: https://secwatch.observer/filing/0001728117-26-000054.txt

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