ATOSSA THERAPEUTICS, INC. (ATOS) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-05-14

ATOSSA THERAPEUTICS, INC. (ATOS) has filed 6 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-14. 3 Form 8-K material event filings were reported by ATOS in the last 90 days. InsiderAlpha tracks every ATOS SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About ATOSSA THERAPEUTICS, INC. (ATOS)

SEC CIK	0001488039

90-Day SEC Filing Activity

Form 4 filings (90d)	6
Form 8-K filings (90d)	3
Latest Form 4 filing	2026-05-14

Recent ATOS Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-05-12	Steinhart Richard I	Insider	A — Grant or award	10.0K	$0.00	—	SEC
2026-05-12	Galli Stephen J	Insider	A — Grant or award	10.0K	$0.00	—	SEC
2026-05-12	Cigler Tessa	Insider	A — Grant or award	10.0K	$0.00	—	SEC
2026-05-12	Remmel H. Lawrence	Insider	A — Grant or award	10.0K	$0.00	—	SEC
2026-05-12	Finn Jonathan	Insider	A — Grant or award	10.0K	$0.00	—	SEC
2026-05-12	Chen Shu-Chih	Insider	A — Grant or award	10.0K	$0.00	—	SEC
2026-03-27	QUAY STEVEN C	President & CEO	A — Grant or award	65.0K	$0.00	—	SEC
2026-03-26	Daniel Mark James	Chief Financial Officer	A — Grant or award	63.0K	$0.00	—	SEC
2026-01-20	QUAY STEVEN C	President & CEO	A — Grant or award	325.2K	$0.00	—	SEC
2026-01-20	QUAY STEVEN C	President & CEO	A — Grant or award	331.7K	$0.00	—	SEC
2025-05-21	QUAY STEVEN C	President CEO	P — Open-market purchase	11.2K	$0.88	$10K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for ATOSSA THERAPEUTICS, INC. (ATOS). Updated in real time as new filings are submitted to the SEC.

Most-Active ATOS Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Steinhart Richard I	1	—
Galli Stephen J	1	—
Cigler Tessa	1	—
Remmel H. Lawrence	1	—
Finn Jonathan	1	—

Recent ATOS Form 8-K Material Events

2026-06-11 — Item 1.01, 9.01 [SEC]
2026-05-08 — Item 9.01 [SEC]
2026-05-08 — Item 5.07 [SEC]
2026-04-16 — Item 8.01 · Legal · positive [SEC]
Atossa Therapeutics settled patent disputes with Intas Pharmaceuticals and Jina Pharmaceuticals related to Endoxifen intellectual property, resolving PTAB proceedings and establishing mutual covenants not to challenge specified patents. The settlement preserves Atossa's ability t
2026-03-25 — Item 9.01 · Earnings · neutral [SEC]
Atossa Therapeutics issued a press release on March 25, 2026 announcing fourth quarter and full year 2025 financial results along with a company update. The filing provides standard financial reporting without explicit beat/miss or guidance language.

Recent Insider Filings

2026-05-14 — Steinhart Richard I (Insider)
2026-05-14 — Chen Shu-Chih (Insider)
2026-05-14 — Remmel H. Lawrence (Insider)
2026-05-14 — Finn Jonathan (Insider)
2026-05-14 — Galli Stephen J (Insider)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ATOS insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

ATOS Insider Trading — FAQ

What is the latest insider trade for ATOS?: ATOSSA THERAPEUTICS, INC. (ATOS) had 6 insider filings in the last 90 days, with the most recent on 2026-05-14. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying ATOS stock?: 0 insider purchases of ATOS were filed in the last 90 days.
How many insiders are selling ATOS stock?: 0 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)?: InsiderAlpha aggregates every ATOS SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

Open the live ATOS dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.