---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-078540"
form_type: "8-K"
ticker: "HCMA"
cik: "0002069856"
company_name: "HCM III ACQUISITION CORP."
filed_at: "2025-08-19T23:59:59+00:00"
generated_at: "2026-05-17T11:36:08.354692+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# HCM III Acquisition Corp. closes IPO of 25.3M units at $10, raising $253M trust

## Summary
- IPO of 25,300,000 units at $10.00 per unit closed Aug 4, 2025; includes full over-allotment of 3.3M units.
- Gross proceeds of $253M deposited into trust account; $12M deferred underwriting fee accrued.
- Private placement of 4,266,667 warrants at $1.50 each sold to sponsor and Cantor Fitzgerald, raising $6.4M.
- Company enters advisory agreement with Zenith Securities for consulting fees of 0.65% of IPO proceeds.
- Audited balance sheet as of Aug 4, 2025 shows $1.3M cash outside trust, $253M in trust, and $11.98M accumulated deficit.

## SEC filing metadata
- accession: 0001213900-25-078540
- form_type: 8-K
- ticker: HCMA
- cik: 0002069856
- company_name: HCM III ACQUISITION CORP.
- filed_at: 2025-08-19T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2069856/000121390025078540/0001213900-25-078540-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2069856/000121390025078540/ea0253622-8k_hcm3.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-078540
- JSON: https://secwatch.observer/filing/0001213900-25-078540.json
- Plain text: https://secwatch.observer/filing/0001213900-25-078540.txt

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