# OS Therapies Incorporated (OSTX)

> OS Therapies Incorporated (OSTX) trades at $1.24 (-4.62%) as of 8:00:00 PM EDT on Oct 30, 2026, -22.98% over the past month. Market cap is $58.04M, with 2.9 days to cover in short interest.

Canonical: https://massive.com/quote/ostx
Data as of: 2026-10-31T00:00:00.009Z (15-minute delayed)
Source: Massive (https://massive.com/docs/llms.txt)

## Price

**$1.24** -0.06 (-4.62%)
At close · 15-minute delayed
NYSE American · usd

After hours: **$1.24** +0.02 (+1.61%)
As of 8:00:00 PM EDT on Oct 30, 2026 · After hours

## Stock performance

How OS Therapies Incorporated (OSTX) stock has performed from one day to one year, with its 52-week range.

| Period | Return |
| --- | --- |
| 1D | -4.62% |
| 1W | -0.80% |
| 1M | -22.98% |
| YTD | -11.43% |
| 1Y | -33.69% |
| 52-wk range | $1.15 – $2.25 |

From daily closes through Oct 30, 2026.

## Key statistics

Today's trading snapshot for OSTX: day range, open, previous close, volume and market cap.

| Measure | Value |
| --- | --- |
| Day range | $1.21 – $1.28 |
| Open | $1.27 |
| Prev close | $1.30 |
| Volume | 321.73K |
| Market cap | $58.04M |
| Shares out | 4.59M |

## Valuation and profitability ratios

Valuation and profitability ratios for OS Therapies Incorporated: P/E, P/S, P/B, ROE and more.

| Measure | Value |
| --- | --- |
| P/E | — |
| P/S | — |
| P/B | -4.87 |
| P/FCF | — |
| ROE | 330.4% |
| ROA | -397.8% |
| Debt/Equity | -0.01 |
| Div yield | 0.00% |

As of Oct 30, 2026

## Insider trading

[OS Therapies Incorporated (OSTX) insider trading](https://massive.com/quote/ostx/insider-trading.md): open-market Form 4 buys and sells by OS Therapies Incorporated insiders over the last 12 months.

## 8-K filings

Material corporate events OS Therapies Incorporated has disclosed to the SEC on Form 8-K.

- Oct 19, 2026 · Warrant or conversion
  “On October 15, 2026, the Company completed an initial Closing of the Inducement Offer, at which seven Holders exercised, or pre-funded the exercise of, Existing Warrants to purchase an aggregate of 5,517,253 shares of the Company's common stock and, in exchange, the Company issued to such Holders New Warrants to purchase up to an aggregate of 5,517,253 shares of the Company's common stock.”
- Oct 5, 2026 · Executive compensation change
  “In connection with Mr. Clem's appointment as Chief Commercial Officer, the Company entered into an employment agreement with Mr. Clem setting forth the terms of his employment and initial compensation.”
- Sep 9, 2026 · Annual meeting results
  “The stockholders ratified the appointment of MaloneBailey, LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026, which required the affirmative vote of the majority of shares of stock present, in person or by proxy, and entitled to vote.”
- Aug 21, 2026 · Underwriting agreement
  “On August 21, 2026, OS Therapies Incorporated (the "Company") entered into an Open Market Sale Agreement℠ (the "Sales Agreement") with Jefferies LLC (the "Sales Agent"), pursuant to which the Company may offer and sell shares of its common stock from time to time through or to the Sales Agent in connection with the Company's "at the market offering" program (the "ATM Offering").”
- Aug 12, 2026 · Debt issuance
  “senior secured convertible promissory notes in an aggregate subscription amount of up to $10,000,000... The Notes bear interest at a rate of 9.0% per annum... Each tranche of the Note matures on the date that is nine months following the applicable advance date.”

## OSTX short interest

How heavily OSTX is shorted: shares short, days to cover and average daily volume.

| Measure | Value |
| --- | --- |
| Days to cover | 2.9 |
| Short interest | 2.82M |
| Avg volume | 963.53K |

As of Oct 15, 2026 · reported to FINRA twice monthly.

## OSTX news

The latest news and headlines about OS Therapies Incorporated (OSTX).

- [The Patent Cliff is Coming, Driving Smart Money Towards Precision Oncology](https://www.globenewswire.com/news-release/2026/03/19/3259233/0/en/The-Patent-Cliff-is-Coming-Driving-Smart-Money-Towards-Precision-Oncology.html) · GlobeNewswire Inc. · Mar 19, 2026 · positive sentiment
- [Cancer Pipeline Milestones Coming Fast as Regulators Revisit Research Priorities](https://www.benzinga.com/pressreleases/25/07/n46457093/cancer-pipeline-milestones-coming-fast-as-regulators-revisit-research-priorities) · Benzinga · Jul 16, 2025 · positive sentiment
- [The $900 Billion Question: Who Will Deliver the Next Cancer Breakthrough?](https://www.benzinga.com/pressreleases/25/06/n46119312/the-900-billion-question-who-will-deliver-the-next-cancer-breakthrough) · Benzinga · Jun 26, 2025 · positive sentiment

## About OS Therapies Incorporated

OS Therapies Inc is a clinical stage biopharmaceutical company focused on the identification, development and commercialization of treatments for Osteosarcoma (OS) and other solid tumors. The company's mission is to address the need for new treatments in cancers of the bone in children and young adults. The company has pipeline of product candidates targeting multiple indications for solid cancers including two drug technologies: (i) OST-HER2, an off-the-shelf immunotherapy, which is a type of cancer treatment that helps the immune system fight cancer and OST-tADC which is a tunable drug conjugate (tADC) platform currently in preclinical development. Each tADC contains four main components: ligand, payload cassette adaptor, linker and payload.

| Measure | Value |
| --- | --- |
| Exchange | NYSE American |
| Market | stocks |
| Type | CS |
| Currency | USD |
| Industry | PHARMACEUTICAL PREPARATIONS |
| Employees | 5 |
| Listed | Aug 1, 2024 |

[Company website](https://www.ostherapies.com)

## FAQ

### What is the OS Therapies Incorporated (OSTX) stock price today?

OS Therapies Incorporated (OSTX) is trading at $1.24 (-4.62% on the day) as of 8:00:00 PM EDT on Oct 30, 2026. Prices are delayed at least 15 minutes; real-time quotes are available from the Massive API.

### What is OS Therapies Incorporated?

OS Therapies Inc is a clinical stage biopharmaceutical company focused on the identification, development and commercialization of treatments for Osteosarcoma (OS) and other solid tumors.

### What is the short interest in OSTX?

As of Oct 15, 2026, OSTX has 2.82M shares short and 2.9 days to cover.

### What exchange is OSTX listed on?

OS Therapies Incorporated (OSTX) trades on NYSE American in USD, in the PHARMACEUTICAL PREPARATIONS industry.

## Live data

Prices here are 15-minute delayed. For real-time OSTX quotes and the full history behind this page, use the Massive API or MCP server:

- `GET https://api.massive.com/v3/snapshot?ticker.any_of=OSTX`

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) insider trading](https://massive.com/quote/ostx/insider-trading.md)
- [SEC 8-K events](https://massive.com/quote/sec-filings/8-k.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