---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-059738"
form_type: "8-K"
ticker: "CERO"
cik: "0001870404"
company_name: "CERO THERAPEUTICS HOLDINGS, INC."
filed_at: "2025-06-30T23:59:59+00:00"
generated_at: "2026-05-18T14:44:41.886846+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# CERo Therapeutics raises $1.85M via Series D preferred stock; adds new institutional investors

## Summary
- Closed additional closing of 2,315 shares of Series D convertible preferred stock for gross proceeds of ~$1,852,000.
- Entered into Amendment No. 1 to the Securities Purchase Agreement adding new institutional investors as buyers.
- New investors join through joinder agreements, becoming parties to the existing Securities Purchase Agreement.
- The Series D preferred stock is convertible into shares of CERO common stock; offering exempt under Rule 506/Section 4(a)(2).

## SEC filing metadata
- accession: 0001213900-25-059738
- form_type: 8-K
- ticker: CERO
- cik: 0001870404
- company_name: CERO THERAPEUTICS HOLDINGS, INC.
- filed_at: 2025-06-30T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1870404/000121390025059738/0001213900-25-059738-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1870404/000121390025059738/ea0247627-8k_cero.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-059738
- JSON: https://secwatch.observer/filing/0001213900-25-059738.json
- Plain text: https://secwatch.observer/filing/0001213900-25-059738.txt

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