NASDAQ · ATOSHealthcarePharmaceuticals

Atossa Therapeutics, Inc. Common Stock (ATOS)

$2.24−3.68%
Close Nov 4, 2026 · split-adjusted
Nov 3, 2026$2.33▼ 82.01% in range
Nov 3, 2025Low $1.75 · High $13.57Nov 3, 2026
What changed · written from our data
As of Nov 4, 2026

Atossa Therapeutics closed at $2.24 on Nov 4, down 3.68%, 83.5% below its 52-week closing high. Volume of 19.5K shares was 0.21× its 20-day average (below normal).

Split-adjusted performance: -8.4% over one month, -61.3% over six months, -82.7% over one year.

Short interest was 683.5K shares at the Oct 15 settlement, down 13.3% from the prior report (7.7% of float, 5.8 days to cover).

Market cap$22.4M10.0M shares
Revenue · quarter$0.00—
Diluted EPS$-0.95—
P/E · TTM—
Net margin—
Dividend yieldNone
52-week range1.75 – 13.57−83.5% from high
Volume19.5K0.21× 20-day avg
Volatility · 60d77.0%Annualised
Short % of float7.7%5.9 days to cover
Net cash$26.1MCash $26.1M
Next earnings—Not scheduled
Split-adjusted performance
1W −5.3%1M −8.4%3M −7.3%6M −61.3%YTD −74.6%1Y −82.7%3Y −77.1%5Y −94.3%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Pharmaceuticals

Percentile among 420 companies (100 = best)

6-month momentum17
Revenue growth—
Net margin—
Value (low P/E)—
Size22

Industry medians: 6-month return −25.3%, revenue growth +6.2%, net margin −33.8%, P/E 16.1×.

Short interest

Details →
Shares short683.5K−13.3% vs prior
Days to cover5.9Settled Oct 15
% of float7.7%
Short vol. 10d38.5%of daily volume

Closest peers by size in Pharmaceuticals

CompanyPriceToday6MRev. growthNet marginP/EMkt cap
ATOSAtossa Therapeutics$2.24−3.68%−61.3%———$22.4M
MIRAMIRA Pharmaceuticals$0.5411+4.51%−45.9%———$22.7MCompare
CRVOCervoMed$1.53−1.61%−60.2%−100.0%——$23.1MCompare
EDSAEdesa Biotech$2.20−3.51%−85.3%———$21.2MCompare
TXMDTherapeuticsMD$1.82+2.25%−10.3%−8.7%17.8%—$21.1MCompare
AYTUAYTU BioPharma$1.91−1.04%−25.4%+6.4%−0.1%—$20.8MCompare
SHPHShuttle Pharmaceuticals Holdings$5.34+3.69%−31.5%———$25.4MCompare
CPHIChina Pharma Holdings$0.5950−2.33%+12.8%−7.5%−153.8%—$25.6MCompare
IGCIGC Pharma$0.1882+1.18%−40.9%−19.2%−1107.9%—$19.5MCompare

Quick answers

What does Atossa Therapeutics do?
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.
What is ATOS's market cap?
$22.40M, based on the Nov 4 close of $2.24.
Does Atossa Therapeutics pay a dividend?
No regular cash dividend has been paid in the last year.
How much of ATOS is sold short?
683.5K shares, 7.7% of float, as of Oct 15, 2026.
What sector is ATOS in?
Healthcare, in the Pharmaceuticals industry.

About Atossa Therapeutics

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.

HQ: Seattle, WA14 employeesListed Nov 8, 2012atossatherapeutics.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology