Atossa Therapeutics Inc. (NASDAQ: ATOS) Stock Information | RedChip
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Atossa Therapeutics Inc. (NASDAQ: ATOS)
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$4.52
-0.3350 ( -6.91% ) 52.5K

Atossa Therapeutics, Inc. is a clinical-stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on using (Z)-endoxifen to prevent and treat breast cancer.

Clinical Trial Pipeline Stages


Drug Name Stage
(Z)-endoxifenDetailsCancer, Carcinoma Phase 2
(Z)-endoxifen + Abemaciclib (VERZENIO®)DetailsCancer, Breast cancer Phase 2
AT-301DetailsCOVID-19 Failed
AT-H201DetailsCOVID-19 Failed

Market Data


Open $4.52
Previous Close $4.85
Volume 52.5K
Market Cap $40.47M
Day Range $4.51 - $4.85
52 Week Range $3.76 - $19.35
Shares Outstanding 8.61M
Change % -6.91%
Net Change ▼ -0.3350
Insider Ownership -0.31%
Exchange NASDAQ
SectorHealthcare
IndustryBiotechnology: Pharmaceutical Preparations
IPO Year2012
CountryUnited States
UnderwriterIPO Intelligence Only

Insider Ownership Transactions

Total Amount Purchased: -3,219,895.00

Date Type Amount Purchased Purchaser
2024-03-14 Sale -20834.00 Cigler Tessa
2023-11-17 Sale -50000.00 WEAVER GREGORY L
2023-11-15 Sale -62500.00 Finn Jonathan

SEC Filings


Form Type Description Pages Date
4 Insider transactions 1 Mar 31, 2026
def Proxies and info statements 19 Mar 30, 2026
4 Insider transactions 1 Mar 30, 2026
8-k 8K-related 11 Mar 25, 2026
10-k Annual reports 73 Mar 25, 2026
pre Proxies and info statements 19 Mar 20, 2026
424b5 Other 4 Feb 20, 2026
8-k 8K-related 15 Feb 20, 2026
424b3 Other 2 Feb 20, 2026
8-k 8K-related 10 Feb 17, 2026

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