---
schema_version: "secwatch.filing_event.v1"
accession: "0001759138-26-000041"
form_type: "8-K"
ticker: "CABA"
cik: "0001759138"
company_name: "Cabaletta Bio, Inc."
filed_at: "2026-09-14T12:00:53+00:00"
generated_at: "2026-09-14T12:05:21.160630+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Cabaletta Bio nets ~$128.2M gross from warrant exercises; 46M warrants exercised near expiry

## Summary
- 53,090,190 warrants issued June 2025 at $2.50/share, expiring Sept 12, 2026.
- 5,275,100 warrants exercised through June 30, 2026, raising ~$13.2M.
- 46,011,900 warrants exercised July 1–Sept 12, 2026, raising ~$115.0M.
- Total gross proceeds from all warrant exercises ~$128.2M.

## SEC filing metadata
- accession: 0001759138-26-000041
- form_type: 8-K
- ticker: CABA
- cik: 0001759138
- company_name: Cabaletta Bio, Inc.
- filed_at: 2026-09-14T12:00:53+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1759138/000175913826000041/0001759138-26-000041-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1759138/000175913826000041/caba-20260914.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001759138-26-000041
- JSON: https://secwatch.observer/filing/0001759138-26-000041.json
- Plain text: https://secwatch.observer/filing/0001759138-26-000041.txt

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