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OSTX SCHEDULE 13G/A: SEC filing

Thomas A. Satterfield, Jr.

Filed with the SEC on · accession 0001104659-26-125053

OSTX filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 10, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -3.3% by the first close after the filing.

Summary of the filing

Thomas A. Satterfield, Jr. filed an amended Schedule 13G reporting beneficial ownership of approximately 9.9% of OS Therapies Inc's common stock, including shares, Series A Preferred Stock, and warrants, subject to blocker provisions limiting ownership to 9.95%.

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Key details

Shares of common stock beneficially owned$5.4M
Shares of common stock held directly$3.1M
Shares issuable upon conversion of Series A Preferred Stock and exercise of Warrants$2.3M
Total shares outstanding used for percentage calculation$52.3M
IssuerOS Therapies Inc
Holder of shares, wholly owned by mr. satterfieldTomsat Investment & Trading Co., Inc.
Holder of shares, managed by a general partner controlled by mr. satterfieldA.G. Family L.P.
Reporting person / beneficial ownerThomas A. Satterfield, Jr.

How OSTX stock reacted

Close before

$0.92

Nov 9, 2026

First close after

-3.27%

$0.89

5 trading days

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Since filing

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Frequently asked questions

What did OSTX file with the SEC on Nov 10, 2026?

OSTX filed a SCHEDULE 13G/A (SEC filing). Thomas A. Satterfield, Jr. filed an amended Schedule 13G reporting beneficial ownership of approximately 9.9% of OS Therapies Inc's common stock, including shares, Series A Preferred Stock, and warrants, subject to blocker provisions limiting ownership to 9.95%.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did OSTX stock react to this filing?

OSTX closed at $0.92 before the filing and $0.89 on Nov 10, 2026 (-3.27%).

Other OSTX SEC filings

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