---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-092651"
form_type: "8-K"
ticker: "OSTX"
cik: "0001795091"
company_name: "OS Therapies Inc"
filed_at: "2026-08-21T20:50:49+00:00"
generated_at: "2026-08-21T20:52:09.794651+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# OS Therapies enters $75M ATM equity offering with Jefferies LLC

## Summary
- On Aug 21, 2026, OS Therapies (OSTX) entered an Open Market Sale Agreement with Jefferies LLC.
- Company may sell up to $75 million of common stock via at-the-market offering under Form S-3.
- Jefferies earns 3.0% commission on gross proceeds; up to $100,000 in legal fee reimbursements.
- Net proceeds to fund clinical trials, R&D programs, and potential complementary acquisitions.
- Offering terminates when all shares sold or upon 10 days' notice from either party.

## SEC filing metadata
- accession: 0001213900-26-092651
- form_type: 8-K
- ticker: OSTX
- cik: 0001795091
- company_name: OS Therapies Inc
- filed_at: 2026-08-21T20:50:49+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1795091/000121390026092651/0001213900-26-092651-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1795091/000121390026092651/ea0303019-8k_ostherapies.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-092651
- JSON: https://secwatch.observer/filing/0001213900-26-092651.json
- Plain text: https://secwatch.observer/filing/0001213900-26-092651.txt

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