---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-082876"
form_type: "8-K"
ticker: "OSTX"
cik: "0001795091"
company_name: "OS Therapies Inc"
filed_at: "2026-07-29T21:00:57+00:00"
generated_at: "2026-07-29T21:02:03.632156+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# OS Therapies terminates $18M ATM sales agreement with B. Riley and JonesTrading

## Summary
- Terminated At Market Issuance Sales Agreement dated Aug 8, 2025, effective July 28, 2026.
- Agreement allowed up to $18M in common stock sales; only $530,162 raised from 282,679 shares.
- Approximately $17.47M remained unsold; no further sales permitted under the agreement.
- No termination fees or other payments were due by either party.

## SEC filing metadata
- accession: 0001213900-26-082876
- form_type: 8-K
- ticker: OSTX
- cik: 0001795091
- company_name: OS Therapies Inc
- filed_at: 2026-07-29T21:00:57+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1795091/000121390026082876/0001213900-26-082876-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1795091/000121390026082876/ea0299692-8k_ostherapies.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-082876
- JSON: https://secwatch.observer/filing/0001213900-26-082876.json
- Plain text: https://secwatch.observer/filing/0001213900-26-082876.txt

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