ATOSSA THERAPEUTICS, INC. (ATOS)
Data as of , from SEC Form 4 filings.
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- Steven C. Quay - OfficerOpen-market purchase$10K
Richard I. SteinhartGrant or award10,000 sh
Shu-Chih Chen
About ATOSSA THERAPEUTICS, INC. (ATOS)
Atossa Therapeutics Inc is a clinical-stage biopharmaceutical company engaged in the development of proprietary medicines for oncology, with a focus on breast cancer and related conditions. The company's lead product candidate, oral (Z)-endoxifen, is a selective estrogen receptor modulator and degrader (SERM/SERD) in Phase 2 clinical development, being evaluated for the treatment and prevention of breast cancer and other indications.
- SEATTLE, WA
- 14
- 2012
- XNAS
https://www.atossatherapeutics.comSEC filings for ATOS on EDGAR
ATOS Form 4 activity by transaction type, last 90 days
No Form 4 activity for ATOS in the last 90 days.
ATOS insider transactions (Form 4)
1614 Form 4 filings on record, the earliest from May 15, 2025, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Richard I. Steinhart | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
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| Shu-Chih Chen | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
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 H. Lawrence Remmel | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
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 Jonathan Finn | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| ||||||
 Stephen J. Galli | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
| ||||||
 Tessa Cigler | Grant or award | Common Stock | 10,000 footnote F1 | $0.00 | - | |
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| Steven C. Quay - Officer | Grant or award | Common Stock | 65,000 footnote F1 | $0.00 | - | |
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| Mark James Daniel - Officer | Grant or award | Common Stock | 63,000 footnote F1 | $0.00 | - | |
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| Steven C. Quay - Officer | Grant or award | Common Stock | 331,674 | $0.00 | - | |
| Steven C. Quay - Officer | Grant or award | Stock Options (right to buy) | 950,000 | $0.60 | $573K | |
| Steven C. Quay - Officer | Grant or award | Common Stock | 325,203 | $0.00 | - | |
| Steven C. Quay - Officer | Grant or award | Stock Options (right to buy) | 950,000 | $0.60 | $573K | |
| Mark James Daniel - Officer | Grant or award | Stock Option (right to buy) | 578,000 | $0.00 | - | |
| Steven C. Quay - Officer | Open-market purchase | Common Stock | 11,239 | $0.88 | $10K | |
| Richard I. Steinhart | Grant or award | Stock Option (right to buy) | 125,000 | $0.00 | - | |
| Steven C. Quay - Officer | Grant or award | Stock Option (right to buy) | 1,366,062 | $0.00 | - | |
ATOS insider trading FAQ
What is the latest insider trade for ATOS?
ATOSSA THERAPEUTICS, INC. (ATOS) has filed no insider reports in the last 90 days. The most recent on record is dated 2026-05-14. The full record for ATOS runs to 14 Form 4 filings, the earliest from 2025-05-15. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying ATOS stock?
No insider purchases of ATOS were filed in the last 90 days. 1 purchase is on record for this company.
How many insiders are selling ATOS stock?
No insider sales of ATOS were filed in the last 90 days.
Where can I see ATOS SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects ATOS Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Richard I. Steinhart view on EDGAR
- - Shu-Chih Chen view on EDGAR
- - H. Lawrence Remmel view on EDGAR
- - Jonathan Finn view on EDGAR
- - Stephen J. Galli view on EDGAR
- - Tessa Cigler view on EDGAR
- - Steven C. Quay view on EDGAR
- - Mark James Daniel view on EDGAR
- - Steven C. Quay view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Insider activity in Health Care
- Where ATOS's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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