# OS Therapies Incorporated (OSTX) insider trading

> No open-market OSTX insider purchases or sales were filed in the 12 months to Oct 31, 2026.

Canonical: https://massive.com/quote/ostx/insider-trading
Latest filing: 2026-10-30 (last 12 months; source: SEC EDGAR)
Source: Massive (https://massive.com/docs/llms.txt)

## Summary

| Measure | Value | Detail |
| --- | --- | --- |
| Open-market sales | $0 | 0 filings · 0 insiders |
| Open-market purchases | $0 | 0 filings |

## Open-market trades by insider

No open-market purchases or sales in the last 12 months.

## How to read this page

- **Open-market purchase or sale**: A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- **Filing date**: Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.

## FAQ

### Has OS Therapies Incorporated's CEO sold stock?

No. Paul A. Romness (CEO) made no open-market sales filed as CEO in the last 12 months.

### How current is OSTX’s insider data?

These are OSTX Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.

### What counts as an open-market buy or sell?

Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.

## Live data

This page joins two Massive endpoints: Form 4 filings and daily prices. The OSTX Form 4 request:

- `GET https://api.massive.com/stocks/filings/vX/form-4?tickers=OSTX&filing_date.gte=2025-10-31&sort=filing_date.desc&limit=500`

Requests need a Massive API key. API reference for agents: https://massive.com/docs/llms.txt. Connect an AI agent through the Massive MCP server: https://massive.com/docs/ai-tools.

## Related

- [OS Therapies Incorporated (OSTX) stock price](https://massive.com/quote/ostx.md)
- [Recent insider trading](https://massive.com/quote/insider-trading.md)
- [Markets overview](https://massive.com/quote/index.md)

Nothing here is investment advice. Data and content are provided for informational purposes under the Massive Terms of Service: https://massive.com/terms