---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-096583"
form_type: "8-K"
ticker: "CBRRF"
cik: "0001845149"
company_name: "Chain Bridge I"
filed_at: "2025-10-06T23:59:59+00:00"
generated_at: "2026-05-17T04:37:34.522727+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Chain Bridge I issues $1.25M convertible promissory note to C/M Capital Master Fund LP

## Summary
- Issued unsecured, non-interest bearing promissory note for $1.25M principal; net proceeds of $1M.
- Note matures June 30, 2026; prepayable without penalty; ranks junior to certain existing debt.
- Proceeds used for fees/expenses related to initial business combination and for general corporate purposes.
- Lender may exchange note for new series of preferred shares, to be authorized by Nov 15, 2025.
- Note includes customary covenants and events of default, including failure to establish new preferred shares.

## SEC filing metadata
- accession: 0001213900-25-096583
- form_type: 8-K
- ticker: CBRRF
- cik: 0001845149
- company_name: Chain Bridge I
- filed_at: 2025-10-06T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1845149/000121390025096583/0001213900-25-096583-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1845149/000121390025096583/ea0260440-8k_chain1.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-096583
- JSON: https://secwatch.observer/filing/0001213900-25-096583.json
- Plain text: https://secwatch.observer/filing/0001213900-25-096583.txt

## Key facts
- Debt Financings
  Chain Bridge I incurred loan of $1,250,000 with C/M Capital Master Fund LP at non-interest bearing maturing June 30, 2026.
  - Instrument: loan
  - Principal: $1,250,000
  - Counterparty: C/M Capital Master Fund LP
  - Rate: non-interest bearing
  - Maturity: June 30, 2026
  - Event: incurrence
  source text: On September 30, 2025, the Company issued an unsecured, non-interest bearing promissory note (the “Note”) to C/M Capital Master Fund LP (the “Lender”) in the aggregate principal amount of $1,250,000, for an aggregate purchase price of $1,000,000.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1845149/000121390025096583/0001213900-25-096583-index.htm

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