---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-23-094779"
form_type: "8-K"
ticker: "CERO"
cik: "0001870404"
company_name: "CERO THERAPEUTICS HOLDINGS, INC."
filed_at: "2023-12-11T23:59:59+00:00"
generated_at: "2026-06-07T15:10:56.431913+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Phoenix Biotech Acquisition Corp. boosts sponsor note limit to $1.6M from $1.5M

## Summary
- First Amendment to Promissory Note raises maximum principal from $1.5M to $1.6M.
- Approximately $1.4M had been drawn under the note as of December 8, 2023.
- All other material terms unchanged; note matures upon consummation of initial business combination.
- Note is with sponsor Phoenix Biotech Sponsor, LLC; executed December 8, 2023.

## SEC filing metadata
- accession: 0001213900-23-094779
- form_type: 8-K
- ticker: CERO
- cik: 0001870404
- company_name: CERO THERAPEUTICS HOLDINGS, INC.
- filed_at: 2023-12-11T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1870404/000121390023094779/0001213900-23-094779-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1870404/000121390023094779/ea189698-8k425_phoenix.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-23-094779
- JSON: https://secwatch.observer/filing/0001213900-23-094779.json
- Plain text: https://secwatch.observer/filing/0001213900-23-094779.txt

## Key facts
- Debt Financings
  CERO THERAPEUTICS HOLDINGS, INC. amended loan of $1,600,000 with Phoenix Biotech Sponsor, LLC.
  - Instrument: loan
  - Principal: $1,600,000
  - Counterparty: Phoenix Biotech Sponsor, LLC
  - Event: amendment
  source text: On December 8, 2023, the Company and the Lender amended the Promissory Note to increase the aggregate principal amount of the Promissory Note from $1,500,000 to $1,600,000.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1870404/000121390023094779/0001213900-23-094779-index.htm
- Material Agreements
  CERO THERAPEUTICS HOLDINGS, INC. amended Promissory Note with Phoenix Biotech Sponsor, LLC valued at $1,500,000 to $1,600,000 (effective 2023-12-08).
  - Action: amendment
  - Agreement: credit facility
  - Counterparty: Phoenix Biotech Sponsor, LLC
  - Value: $1,500,000 to $1,600,000
  - Effective: 2023-12-08
  source text: On December 8, 2023, the Company and the Lender amended the Promissory Note to increase the aggregate principal amount of the Promissory Note from $1,500,000 to $1,600,000.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1870404/000121390023094779/0001213900-23-094779-index.htm

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