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... Read More

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... Read More

Veteran development leader with successful regulatory approvals record returns to lead late-stage clinical and regulatory programs to address multiple unmet clinical needs SEATTLE , Oct. 1, 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 Janet... Read More

Engagement to enhance investor awareness, strengthen shareholder engagement, and broaden reach to target institutional and retail audiences SEATTLE, Sept. 17, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS; “Atossa” or the “Company”), a clinical-stage biopharmaceutical company developing new approaches in breast cancer treatment and prevention, today announces it has appointed CORE IR, a strategic investor... Read More

Type C FDA Meeting Requested, Update Expected by Year-End 2025 SEATTLE , Sept. 8, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS; "Atossa" or the "Company") announced today it has requested a Type C meeting with the U.S. Food and Drug Administration (FDA) to discuss a regulatory strategy aimed at accelerating development of low-dose (Z)-endoxifen for breast cancer risk reduction. Atossa is a clinical-stage... Read More

Dr. Steven Quay , Chairman and Chief Executive Officer to participate in Fireside Chat with Emily Bodnar , HCW Biotech Research Analyst SEATTLE , Aug. 28, 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, today announced that Dr. Steven Quay , Chairman and Chief Executive... Read More

Monotherapy Phase 2 study designed with FDA input; IND expected in Q4 2025 Topline results anticipated in 2026 Positions Atossa for transition into registrational Phase 3 development SEATTLE , Aug. 20, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, announced today it has selected PSI, a... Read More

FDA Provides Positive Feedback, Clears Path for Atossa to File IND for (Z)-Endoxifen in Metastatic Breast Cancer; FDA Indicates No Additional Toxicity Studies Required Strong I-SPY2 Results Reinforce Efficacy of Atossa's Monotherapy at 3-weeks SEATTLE , Aug. 12, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (Atossa or the Company), a clinical-stage biopharmaceutical company developing innovative medicines for... Read More

SEATTLE , July 29, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (NASDAQ: ATOS), a clinical-stage biopharmaceutical company developing innovative medicines in oncology, today announced positive written feedback from the U.S. Food and Drug Administration (FDA) regarding the company's proposed dose optimization trial of (Z)-endoxifen for the treatment of estrogen receptor positive (ER+), human epidermal growth factor receptor... Read More

SEATTLE , June 2, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today announced that Dr. Steven Quay , M.D., Ph.D., President and Chief Executive Officer, will present at the Jefferies Global Healthcare Conference on Thursday, June 5, 2025 at 7:35 a.m. Eastern Time . A live webcast of the... Read More

SEATTLE, WASHINGTON / ACCESS Newswire / May 20, 2025 / Atossa Therapeutics, Inc. (Nasdaq:ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, is pleased to invite investors to a webinar on May 22, 2025, at 4:15 p.m. ET. The exclusive event, hosted by RedChip Companies, will feature Dr. Steven Quay, CEO of Atossa Therapeutics. Attendees will gain... Read More

Feasibility endpoint achieved; rapid Ki‑67 suppression and substantial MRI‑confirmed tumor shrinkage observed with favorable safety profile SEATTLE , May 14, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today reported full results from the Phase 2 Endocrine Optimization Pilot (EOP)... Read More

Announced strategic plan to advance (Z)-endoxifen for metastatic breast cancer indication Enhanced (Z)-endoxifen intellectual property portfolio with three new U.S. patents, expanding IP portfolio to more than 200 patent claims related to (Z)-endoxifen Ended first quarter 2025 with $65.1 million in cash and cash equivalents and no debt SEATTLE , May 13, 2025 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (Atossa or... Read More

SEATTLE, April 30, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today announced that the United States Patent and Trademark Office (USPTO) has granted a new patent (U.S. Patent No. 12,281,056) directed to highly pure and stable enteric oral formulations comprising (Z)-endoxifen as... Read More

SEATTLE, April 29, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today outlined a framework for a pioneering Phase 3 clinical study titled SMART 2.0. The proposed trial would investigate the potential of oral (Z)-endoxifen, a potent Selective Estrogen Receptor Modulator (SERM) for... Read More

SEATTLE, April 22, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today announced that the United States Patent and Trademark Office (USPTO) has granted a new patent (U.S. Patent No. 12,275,684) directed to enteric oral formulations comprising (Z)-endoxifen as well as methods of... Read More

CAMBRIDGE, Mass. , April 10, 2025 /PRNewswire/ -- Nona Biosciences, a global biotechnology company providing integrated solutions from "Idea to IND" (I to I TM ), ranging from target validation and antibody discovery through preclinical research, today announced a research collaboration with Atossa Therapeutics Inc. (Nasdaq: ATOS). The collaboration leverages Nona's proprietary H2L2 Harbour Mice ® platform to identify... Read More

Ended 2024 with $71.1 million of cash and cash equivalents and no debt Conference Call and Webcast Scheduled for Tuesday, March 25, 2025, at 8:30 a.m. Eastern Time SEATTLE, March 25, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today announced its financial results for the full year... Read More

SEATTLE, March 20, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today announced that the Company will host a conference call and live audio webcast on Tuesday, March 25, 2025, at 8:30 a.m. ET, to discuss its corporate and financial results for the fourth quarter and full-year 2024.... Read More

SEATTLE, March 11, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company dedicated to the prevention and treatment of breast cancer, today announced its strategic decision to pursue a metastatic breast cancer indication for (Z)-endoxifen. Atossa believes that pursuing a metastatic indication may offer a more efficient regulatory pathway to... Read More

SEATTLE, Feb. 05, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company dedicated to the prevention and treatment of breast cancer, extends its sincere congratulations to Dr. Tessa Cigler, esteemed Board Director at Atossa and Associate Professor of Clinical Medicine at Weill Cornell Medicine, and the Weill Cornell Medicine team for being... Read More

SEATTLE, Jan. 30, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company dedicated to the prevention and treatment of breast cancer, today issued the following statement in response to the Patent Trial and Appeal Board’s (PTAB) final written decision in PGR2023-00043 regarding U.S. Patent No. 11,572,334 (the “’334 patent”). Atossa is... Read More

SEATTLE, Jan. 23, 2025 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical-stage biopharmaceutical company dedicated to the prevention and treatment of breast cancer, today announced that Steven Quay, M.D., Ph.D., Chairman and CEO, has issued a Letter to Shareholders providing an update on the Company’s clinical programs and recent events. The full text of the letter follows:... Read More

SEATTLE, Dec. 12, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced data describing the discovery of compounds that may be synergistic with (Z)-endoxifen and that could potentially be used in combinations... Read More

1 MG Dose (Z)-Endoxifen Shows Potential as a Well-Tolerated, Preventative Therapy for Premenopausal Women at Risk of Developing Breast Cancer Data to be Presented in a Poster Spotlight Session During the 2024 San Antonio Breast Cancer Symposium SEATTLE, Dec. 11, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced full results from its Phase 2 KARISMA-Endoxifen trial... Read More

SEATTLE, Dec. 10, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that three posters involving pharmacokinetic and tolerability data from the Phase 2 EVANGELINE trial will be presented at the 2024 San... Read More

SEATTLE, Dec. 09, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced the presentation of research investigating the anti-cancer activity of (Z)-endoxifen and its byproducts at the American Association for... Read More

SEATTLE, Nov. 21, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced that a poster detailing the anti-cancer activity of (Z)-endoxifen-related compounds in estrogen receptor alpha-positive (ERα+) breast cancer will be presented at the American Association for Cancer Research (AACR) Special Conference in Cancer Research in Toronto from December 9-11, 2024. Atossa is... Read More

SEATTLE, Nov. 20, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc . (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that five abstracts featuring data on (Z)-endoxifen have been accepted for presentation at the San Antonio Breast Cancer Symposium... Read More

Announced positive topline results from KARISMA-Endoxifen Phase 2 study which demonstrated that low doses of (Z)-endoxifen significantly reduced mammographic breast density (MBD), addressing a key breast cancer risk factor Released a preliminary analysis from I-SPY 2 Endocrine Optimization Pilot (EOP) Phase 2 trial of (Z)-endoxifen which met the primary endpoint with 95 percent (19/20 patients) receiving > 75 percent of... Read More

SEATTLE, Nov. 05, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), today announced the appointment of Claudia Lopez, DVM, MSc, as its new Vice President, Clinical Product Development. Dr. Lopez brings more than two decades of clinical development and strategic expertise to Atossa, including leadership roles in global clinical programs across immunology, oncology, and metabolic... Read More

(Z)-Endoxifen Shown to Significantly Reduce Mammographic Breast Density, Potentially Paving the Way for Innovative Cancer Prevention Strategies SEATTLE, Nov. 04, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc . (Nasdaq: ATOS) ("Atossa" or the "Company"), a clinical-stage biopharmaceutical company developing innovative medicines for breast cancer, today released positive topline data from the KARISMA-Endoxifen Phase 2... Read More

(Z)-endoxifen at 10 mg once daily met the primary endpoint with 19/20 (95%) receiving > 75 % of planned treatment in I-SPY-2 Phase 2 Trial Low dose (Z)-endoxifen was well tolerated and demonstrated promising rapid activity in reducing 3-wk Ki-67 and FTV Biomarkers SEATTLE, Oct. 31, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), today released a preliminary analysis from a phase... Read More

SEATTLE, Oct. 21, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (NASDAQ: ATOS) (“Atossa” or the “Company”), today announced that Steven Quay, M.D., Ph.D., Chairman and Chief Executive Officer, will join Per Hall, M.D., Professor of Epidemiology at the Department of Medical Epidemiology and Biostatistics at Karolinska Institute, at a fireside chat at BIO-Europe 2024. During the fireside chat, Drs. Quay and Hall will... Read More

SEATTLE, Oct. 14, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced that Michael Parks, Vice President, Investor and Public Relations, will participate in a virtual fireside chat on Wednesday, October 16, 2024 at 12:00 p.m. EDT at the 2024 Maxim Healthcare Virtual Summit. Atossa is a clinical stage biopharmaceutical company developing innovative medicines in areas... Read More

SEATTLE, Oct. 01, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), today announced its recognition and support of Breast Cancer Awareness Month this October; highlighting the importance of increasing awareness, advancing research, and driving progress toward innovative treatments for breast cancer. Approximately one in eight women will be diagnosed with breast cancer in their... Read More

SEATTLE, Sept. 10, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" or the "Company"), today announced its support of the U.S. Food and Drug Administration (FDA) for issuing a final rule to update the mammography regulations issued under the Mammography Quality Standards Act of 1992 (MQSA), which becomes effective today. Among the updates, the final rule requires mammography facilities to provide... Read More

SEATTLE, Sept. 03, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced its participation in the H.C. Wainwright 26th Annual Global Investment Conference. The event, scheduled for September 9-11, 2024, will be held both in-person and virtually. Steven Quay, M.D., Ph.D., President and Chief Executive Officer, will participate in a virtual fireside chat and meet with... Read More

SEATTLE, Aug. 28, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced that the United States Patent and Trademark Office (USPTO) has granted a new patent (U.S. Patent No. 12,071,391) directed to compositions comprising endoxifen (in free base or salt forms) and an enteric material in which at least 90 percent of the endoxifen is (Z)-endoxifen. The patent also covers... Read More

SEATTLE, Aug. 21, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) and Quantum Leap Healthcare Collaborative™ (QLHC), today announced the first patient has been dosed in their clinical trial evaluating Atossa’s proprietary (Z)-endoxifen in combination with abemaciclib (VERZENIO®), a cyclin-dependent kinase (CDK) 4/6 inhibitor marketed by Eli Lilly and Company, as a neoadjuvant... Read More

SEATTLE, Aug. 20, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) today announced the appointment of Michael Parks as Vice President of Investor and Public Relations. Mr. Parks brings nearly 30 years of investor relations and corporate communications experience working globally within the biopharmaceutical and healthcare industries. He will oversee corporate, executive, and digital communications, investor... Read More

Presented data showing 100% disease control rate after 24-week treatment with (Z)-Endoxifen in 40mg cohort of Phase 2 EVANGELINE study at the American Association for Cancer Research (AACR) Annual Meeting Completed enrollment in 80mg PK Run-in Cohort for EVANGELINE trial Completed Phase 2 Karisma-Endoxifen clinical trial dosing Updated protocol for (Z)-Endoxifen and abemaciclib clinical trial Ended second quarter 2024 with... Read More

SEATTLE, July 22, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced that the 12-patient 80mg pharmacokinetic (PK) run-in cohort of the Phase 2 EVANGELINE (Endoxifen Versus exemestANe GosEreLIn) study has fully enrolled. EVANGELINE is a randomized non-inferiority trial of Atossa’s patented Selective Estrogen Receptor Modulator (SERM), (Z)-endoxifen, and exemestane... Read More

SEATTLE, July 02, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced the appointment of Heather Rees as the Company’s new Chief Financial Officer (CFO). Ms. Rees most recently served as Atossa’s Senior Vice President of Finance and Principal Accounting Officer. Atossa is a clinical stage biopharmaceutical company developing innovative medicines in areas of... Read More

SEATTLE, June 28, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced protocol changes in the previously initiated study to evaluate Atossa’s proprietary (Z)-endoxifen in combination with abemaciclib (VERZENIO ® ), a cyclin-dependent kinase (CDK) 4/6 inhibitor marketed by Eli Lilly and Company. The study is investigating the combination as a neoadjuvant treatment in... Read More

SEATTLE, June 17, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced its expected upcoming inclusion in the Russell 3000 ® Index, according to preliminary Russell reconstruction information posted on the FTSE Russell website. The newly reconstructed index will take effect after the market closes on June 28, 2024. Atossa is a clinical stage biopharmaceutical company... Read More

SEATTLE, June 05, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced that the Company will present at the Sidoti Small-Cap Investor Conference being held June 12-13, 2024. The presentation by Steven Quay, M.D., Ph.D., Atossa’s President and Chief Executive Officer, will take place on Thursday, June 13 at 9:15 am eastern time. Atossa is a clinical stage... Read More

SEATTLE, May 28, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc . (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced support for a new Phase 2 study designed to validate an innovative, artificial intelligence driven, breast cancer risk assessment model. The SMART (Stockholm MAmmography Risk stratified Trial) study will test an individualized, imaging-based screening model designed to identify women with the... Read More

SEATTLE, May 15, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced that the last patient in the Company’s Karisma-Endoxifen clinical trial received their final dose of study medication. Atossa is a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer. The... Read More

Presented data from EVANGELINE study showing 100% disease control rate at 24-weeks Initiated study evaluating (Z)-endoxifen in combination with abemaciclib (VERZENIO®) Ended first quarter 2024 with $84.0 million of cash and cash equivalents and no debt SEATTLE, May 13, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced financial results for the fiscal quarter ended... Read More

SEATTLE, May 07, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced its support of new guidelines released by the U.S. Preventive Services Task Force (USPSTF) recommending that women begin breast cancer screening starting at age 40. Atossa is a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in... Read More

SEATTLE, April 29, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced an expanded research agreement with Weill Cornell Medicine to explore the potential synergy between antibody drug conjugates (ADCs) and (Z)-endoxifen. Atossa is a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a... Read More

SEATTLE, April 15, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) and Quantum Leap Healthcare Collaborative™ today announced the initiation of a new study to evaluate Atossa’s proprietary (Z)-endoxifen in combination with abemaciclib (VERZENIO ® ), a cyclin-dependent kinase (CDK) 4/6 inhibitor marketed by Eli Lilly and Company, in women with ER+/HER2- breast cancer. Atossa is a... Read More

SEATTLE, April 11, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced that Chief Executive Officer Steven Quay, M.D., Ph.D., will speak at the Noble Capital Markets Emerging Growth Healthcare Conference on Wednesday, April 17 at 9:00 am ET. The presentation will be available virtually and members of the Company’s leadership team will be available for one-on-one... Read More

SEATTLE, April 09, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”) today announced promising safety and efficacy data from the Company’s Phase 2 EVANGELINE (Endoxifen Versus exemestANe GosEreLIn) clinical trial. The EVANGELINE study is evaluating (Z)-endoxifen as a neoadjuvant treatment for pre-menopausal women with Grade 1 or 2 Estrogen Receptor positive (ER+) / Human Epidermal... Read More

Fully enrolled two Phase 2 studies with data from both expected in the second half of 2024 First patient dosed in new Phase 2 breast cancer prevention study Data from ongoing Phase 2 EVANGELINE study scheduled to be presented at 2024 AACR Annual Meeting Ended 2023 with $88.5 million of cash and cash equivalents and no debt SEATTLE, April 01, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the... Read More

SEATTLE, March 19, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced that the pre-menopausal, Estrogen Receptor positive (ER+) / Human Epidermal Growth Factor Receptor 2 negative (HER2-), breast cancer patient who received neoadjuvant and adjuvant (Z)-endoxifen therapy under an FDA-approved "expanded access" program has completed five years of treatment. As of the... Read More

SEATTLE, March 18, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), today announced that on March 15, 2024, the Company received written notice from the Listing Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) that the Company has regained compliance with the minimum closing bid price requirement under Nasdaq Listing Rule 5550(a)(2). Atossa is a clinical stage... Read More

SEATTLE, March 12, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) (“Atossa” or the “Company”), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that Tessa Cigler, M.D., M.P.H. was appointed to Atossa’s board of directors, effective immediately. Dr. Cigler is a medical oncologist... Read More

SEATTLE, March 06, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS) announced today that data from the 40mg pharmacokinetic (PK) run-in cohort of the ongoing Phase 2 EVANGELINE (Endoxifen Versus exemestANe GosEreLIn) study will be presented at the American Association for Cancer Research (AACR) Annual Meeting, taking place April 5-10, 2024, in San Diego, California. The EVANGELINE study is investigating... Read More

SEATTLE, Feb. 22, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announced that the first patient has been dosed with Atossa’s proprietary Selective Estrogen Receptor Modulator (SERM), (Z)-endoxifen, in the Re-Evaluating Conditions for... Read More

SEATTLE, Feb. 07, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that the (Z)-endoxifen arm of the ongoing Phase 2 I-SPY 2 clinical trial has fully enrolled. In the study, (Z)-endoxifen, Atossa’s proprietary Selective Estrogen... Read More

SEATTLE, Jan. 09, 2024 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announces the issuance of the following Letter to Shareholders from Steven Quay, M.D., Ph.D., the Company’s President and Chief Executive Officer: To our valued shareholders:... Read More

SEATTLE, Dec. 04, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced the appointment of Dr. Arezoo Mirad as Senior Medical Director. “We are excited to welcome Dr. Mirad to Atossa and look forward to leveraging her extensive experience... Read More

SEATTLE, Nov. 20, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that it has reached full enrollment in the Company’s Karisma-Endoxifen clinical trial, the 240-person Phase 2 study investigating (Z)-endoxifen in premenopausal women... Read More

Achieved significant enrollment milestones in ongoing Phase 2 clinical trials Four ongoing Phase 2 studies evaluating (Z)-endoxifen, including recently announced study in DCIS Ended third quarter 2023 with $94.0 million of cash and cash equivalents SEATTLE, Nov. 13, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to... Read More

SEATTLE, Nov. 09, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that Jonathan Finn, CFA, has been appointed to Atossa’s board of directors, effective November 8, 2023. Mr. Finn has more than 25 years of experience in the financial... Read More

40-site U.S. trial enrolling more than 300 patients could significantly change the way DCIS is treated and reduce possibly unnecessary surgery SAN FRANCISCO , Oct. 30, 2023 /PRNewswire/ -- Quantum Leap Healthcare Collaborative (QLHC) announces the enrollment launch for the Re-Evaluating Conditions for Active Surveillance Suitability as Treatment: Ductal Carcinoma In Situ (RECAST DCIS), a Phase 2 platform study aimed at... Read More

Dr. Steven Quay calls for nutritional guidelines for adolescent girls to reduce future breast cancer SEATTLE , Oct. 11, 2023 /PRNewswire/ -- Physician-Scientist Dr. Steven Quay , MD, PhD is calling for nutritional guidelines for adolescent girls to reduce processed and fast-food consumption during puberty to prevent future breast cancer. His recommendation is based on recent research showing a link between consumption of a... Read More

SEATTLE, WA / ACCESSWIRE / September 18, 2023 / One in eight women will be diagnosed with breast cancer during their lifetime. However, breast cancer does not affect all women in the same way, and individual physiology plays a huge factor. Women with dense breast tissue face a higher risk of developing breast cancer and being diagnosed with later-stage disease. The global breast cancer treatment market was worth $31.9... Read More

SEATTLE, Sept. 18, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces that the Company will take part in the upcoming Cantor Fitzgerald Global Healthcare Conference 2023. Details of the company's participation are as follows:... Read More

Achieved significant enrollment milestones in three ongoing Phase 2 clinical trials Broadened patent protection for proprietary (Z)-endoxifen Strengthened management team with appointment of Greg Weaver as Chief Financial Officer Ended second quarter 2023 with $99.4 million of cash and cash equivalents SEATTLE, Aug. 14, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical... Read More

SEATTLE, Aug. 08, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines to address significant unmet needs in cancer, today announced that it will provide a business update and report financial results for the second quarter 2023 on Monday, August 14, 2023. Company management will host a conference call to review the results at 9:00 a.m.... Read More

SEATTLE, July 20, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that Health Canada has issued a “No Objection Letter” following the Company’s Clinical Trial Application for its Phase 2 EVANGELINE study. This means Atossa can open... Read More

SEATTLE, July 13, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that on July 13, 2023 it received written notice from The Nasdaq Stock Market LLC that it has regained compliance with the minimum closing bid price requirement under... Read More

SEATTLE, WA / ACCESSWIRE / July 12, 2023 / One in eight women will be diagnosed with breast cancer during their lifetime. However, breast cancer does not affect all women in the same way, and individual physiology plays a huge factor. Women with dense breast tissue face a higher risk of developing breast cancer and being diagnosed with later-stage disease. Dense breast tissue refers to the presence of more glandular and... Read More

SEATTLE, July 10, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, today announced that 170 patients have been enrolled in the Company’s ongoing Phase 2 Karisma-Endoxifen clinical trial. Atossa expects the study to fully enroll in the fourth quarter... Read More

SEATTLE, July 06, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces a strategic, sponsored research agreement with Weill Cornell Medicine to study the potential of inducing estrogen receptor (ER) expression in triple-negative... Read More

SEATTLE and SAN FRANCISCO , June 28, 2023 /PRNewswire/ -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology with a focus on breast cancer, and Quantum Leap Healthcare Collaborative™ ("Quantum Leap") today... Read More

SEATTLE, June 27, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces that its Board of Directors has approved a share repurchase program with authorization to purchase up to $10 million of its common stock through December 31,... Read More

SEATTLE, June 22, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces their role as a corporate sponsor of the Are You Dense MusicFest 2023. The event will take place on Saturday, June 24 at the Seven Angels Theater in Waterbury,... Read More

SEATTLE, June 21, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces that the United States Patent and Trademark Office (USPTO) has granted a new patent (No. 11,680,036) directed to enterically encapsulated endoxifen compositions... Read More

SEATTLE, June 14, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces that Chief Executive Officer Steven Quay, M.D., Ph.D., and Chief Financial Officer Greg Weaver, will speak at the Healthcare Virtual Conference Part II, presented... Read More

SEATTLE, June 12, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a focus on breast cancer, today announces that the pharmacokinetic (PK) run-in cohort of the Phase 2 EVANGELINE (Endoxifen Versus exemestANe GosEreLIn) study has fully enrolled. EVANGELINE is a randomized... Read More

SEATTLE, June 01, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a current focus on breast cancer, today announces the appointment of Greg Weaver as the Company’s new Chief Financial Officer (CFO). Mr. Weaver succeeds Kyle Guse. A short video interview with Mr. Weaver... Read More

Two Phase 2 trials investigating (Z)-endoxifen in neoadjuvant setting initiated and are enrolling patients Full enrollment of Phase 2 KARISMA mammographic breast density study expected by end of 2023 Ended first quarter 2023 with $103.9 million of cash and cash equivalents and no debt SEATTLE, May 15, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing... Read More

SEATTLE , May 11, 2023 /PRNewswire/ -- Physician-Scientist Dr. Steven Quay , MD, PhD has provided a set of recommendations to the United States Preventive Services Task Force (USPSTF) following the publication of their draft report on breast cancer screening. The draft recommendations were made available for public comment on May 9, 2023 and can be found here: Breast Cancer: Screening . In the draft recommendations, the... Read More

SEATTLE, May 09, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in oncology with a current focus on breast cancer, today announces that a Trial in Progress poster for the Phase 2 clinical study of (Z)-endoxifen in premenopausal women with early stage ER+ / HER2- breast cancer will be... Read More

Virtual webinar scheduled for Thursday, May 4 at 8:00 am pacific / 11:00 am eastern Meet with Atossa’s Founder and CEO, Steven Quay, M.D., Ph.D. Event is open to the public – registration available at ATOS5423.TribePublic.com SEATTLE, April 27, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet... Read More

SEATTLE, March 22, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in cancer, today announced financial results for the fiscal quarter and fiscal year ended December 31, 2022 and provided an update on recent company developments. Key developments from Q4 2022 and year to date include:... Read More

SEATTLE and SAN FRANCISCO, March 21, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative medicines in areas of significant unmet medical need in oncology, and Quantum Leap Healthcare Collaborative™ today announce that Atossa’s proprietary Selective Estrogen Receptor Modulator (SERM), (Z)-endoxifen, will be evaluated in a new study arm of the... Read More

SEATTLE, March 15, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet needs in cancer, today announced that the Company will present at the Sidoti Small-Cap Virtual Conference being held March 22-23, 2023. The presentation by Dr. Steven Quay, President and Chief Executive Officer and Kyle Guse,... Read More

SEATTLE, Feb. 23, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet need in cancer, today announces that the first patient has been dosed in the Phase 2 EVANGELINE (Endoxifen Versus exemestANe GosEreLIn) study. EVANGELINE is a randomized non-inferiority trial of Atossa’s patented Selective... Read More

SEATTLE, Feb. 13, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet need in cancer, today announces that the United States Patent and Trademark Office (USPTO) has granted a new patent (No. 11,572,334) directed to (Z)-endoxifen encapsulated in an enteric capsule. This patent further reinforces... Read More

SEATTLE, Jan. 25, 2023 (GLOBE NEWSWIRE) -- Atossa Therapeutics, Inc. (Nasdaq: ATOS), a clinical stage biopharmaceutical company developing innovative proprietary medicines to address significant unmet need in cancer, today announces the issuance of the following Letter to Shareholders from Steven C. Quay, M.D., Ph.D., the Company’s CEO and Chairman: TO OUR VALUED STOCKHOLDERS: 2022 was a year of significant progress for... Read More