Atossa Therapeutics, Inc. Email Format

Biotechnology ResearchWashington, United States11-50 Employees

Atossa Therapeutics, Inc. is a biopharmaceutical company based in Seattle, Washington, focused on developing cancer therapies, with an emphasis on breast cancer. The firm is advancing its lead candidate, (Z)-endoxifen, and is actively engaging with the FDA to accelerate its development for high-risk women and in select treatment settings. It operates as a clinical-stage company researching therapies across oncology and other areas of significant unmet medical need, supported by ongoing regulatory and scientific activity such as conference presentations.

Its target population includes women at elevated risk for breast cancer and patients in relevant clinical settings where preventive or therapeutic intervention could alter outcomes. A recent development is that two abstracts about (Z)-endoxifen were accepted for presentation at the 2026 ASCO Annual Meeting, reflecting continued clinical investigation of its lead candidate.

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