Atossa Therapeutics

ATOS

Market cap $100M

Published article outlines rationale for multi-pathway efficacy for (Z)-endoxifen in Duchenne Muscular Dystrophy (DMD); November scientific presentation to spotlight potential in Duchenne carrier–associated pathologies SEATTLE , Nov. 17, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines in oncology, announces a growing body of scientific work supporting the potential role of its investigational therapy (Z)-endoxifen in DMD, a severe, progressive, and ultimately fatal neuromuscular disease, in addition to Duchenne carrier–associated pathologies (D-CAPs) that affect a subset of female carriers. The momentum is anchored by a newly published, peer-reviewed hypothesis article and an upcoming invited scientific presentation.

Company reports progress to file planned IND for (Z)-endoxifen in mBC with CRO selection and streamlined development programs for potential 2026-NDA enabling activities, including a Type C meeting with the FDA, to potentially accelerate (Z)-endoxifen in breast cancer risk reduction Appointed key leadership to drive (Z)-endoxifen development and evolve pathway to commercialization SEATTLE , Nov. 12, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (Atossa or the Company), a clinical-stage biopharmaceutical company developing proprietary innovative medicines in areas of significant unmet medical need in oncology, today announces its financial results for the third quarter ended September 30, 2025 and provides an update on recent corporate developments. "We continue to make meaningful and measurable progress across our (Z)-endoxifen development strategy in oncology," stated Dr. Steven Quay, Atossa Therapeutics' Chairman and CEO.

Studies highlight findings in the use of (Z)-endoxifen to advance breast cancer treatment and prevention SEATTLE , Nov. 6, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines in oncology, announces that four abstracts featuring data on (Z)-endoxifen have been accepted for presentation at the San Antonio Breast Cancer Symposium (SABCS), being held on December 9-12, 2025, in San Antonio, TX. "We continue to add to our body of clinical evidence.

ATOS, BLIN and CLTP have been added to the Zacks Rank #5 (Strong Sell) List on Oct. 22, 2025.

Investor-focused update underscores enrollment momentum, biomarker strategy, and near-term data readouts designed to de-risk development of (Z)-Endoxifen and other endocrine therapies for DCIS SEATTLE , Oct. 21, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines in oncology, today announced that Laura J. Esserman, MD, MBA, Professor of Surgery and Radiology at the University of California, San Francisco and Principal Investigator of RECAST™, will speak at the Early Detection Research Conference in Portland, OR, about the Company's collaborative work in the RECAST platform trial for ductal carcinoma in situ (DCIS), a biologically heterogeneous, non-invasive breast condition that can progress to invasive breast cancer in a subset of patients.

Invites New Investors to Learn More About $ATOS SEATTLE , Oct. 15, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing new approaches in breast cancer treatment and prevention, announces that Chairman and Chief Executive Officer Steven Quay, M.D., Ph.D. will participate in the Maxim Growth Summit on October 22–23, 2025 at the Hard Rock Hotel, New York City.

25+ year life-sciences finance leader brings revenue-forecasting rigor, public-company controls, and capital-markets experience as Atossa prepares for commercial operations with (Z)-endoxifen SEATTLE , Oct. 14, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing new approaches in breast cancer treatment and prevention, announces the appointment of Mark Daniel, CPA (WA; inactive), as Chief Financial Officer. Mr. Daniel is a senior finance leader with more than 25 years of experience building the forecasting cadence, systems, and public-company discipline that support revenue scale in global life-science businesses.

AR, BTCS and ATOS have been added to the Zacks Rank #5 (Strong Sell) List on October 14, 2025.

Portfolio covers high-purity Z-endoxifen enteric formulations, performance characteristics, and manufacturing methods, part of Atossa's multi-jurisdiction IP strategy to support clinical and commercial plans SEATTLE , Oct. 13, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing new approaches in breast cancer treatment and prevention, announces key progress in its global intellectual-property strategy for Z-endoxifen, including the issuance of an Israeli patent and continued renewals that reinforce protection for the Company's lead program across major jurisdictions. The Israeli patent (No.

Changes are expected to reduce future study costs, accelerate objective readouts, and extend operating runway under current plans SEATTLE , Oct. 6, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS; "Atossa" or the "Company), a clinical-stage biopharmaceutical company developing new approaches in breast cancer treatment and prevention, announces an amendment to its Phase 2 EVANGELINE study of (Z)-endoxifen in premenopausal women with newly diagnosed early-stage ER+/HER2- breast cancer. The amended, non-registrational design is expected to accelerate objective readouts while reducing projected future study costs, consistent with Atossa's focus on extending operating runway and deploying capital where it is most impactful.