---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-065655"
form_type: "8-K"
ticker: "CERO"
cik: "0001870404"
company_name: "CERO THERAPEUTICS HOLDINGS, INC."
filed_at: "2025-07-18T23:59:59+00:00"
generated_at: "2026-05-18T05:50:00.464562+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# CERO Therapeutics closes additional $397,600 private placement of Series D Preferred Stock

## Summary
- Issued 497 shares of Series D convertible preferred stock for gross proceeds of approximately $397,600.
- Sale conducted as an Additional Closing under previously announced Securities Purchase Agreement dated April 21, 2025.
- Exempt from registration under Section 4(a)(2) and Rule 506 of the Securities Act.
- Shares are convertible into common stock; terms set forth in Certificate of Designations filed April 22, 2025.

## SEC filing metadata
- accession: 0001213900-25-065655
- form_type: 8-K
- ticker: CERO
- cik: 0001870404
- company_name: CERO THERAPEUTICS HOLDINGS, INC.
- filed_at: 2025-07-18T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1870404/000121390025065655/0001213900-25-065655-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1870404/000121390025065655/ea0249528-8k_cero.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-065655
- JSON: https://secwatch.observer/filing/0001213900-25-065655.json
- Plain text: https://secwatch.observer/filing/0001213900-25-065655.txt

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