Exhibit 99.1 Atossa Therapeutics Announces Year-End 2023 Financial Results and Provides Corporate Update • 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 1, 2024— Atossa Therapeutics, Inc. (Nasdaq: ATOS) ("Atossa" ...

About this content About Emily Jarvie Emily began her career as a political journalist for Australian Community Media in Hobart, Tasmania. After she relocated to Toronto, Canada, she reported on business, legal, and scientific developments in the emerging psychedelics sector before joining Proactive in 2022. She brings a strong journalism background with her work featured in newspapers, magazines, and digital publications across Australia, Europe, and North America, including The Examiner, The Advocate, ...

About this content About Angela Harmantas Angela Harmantas is an Editor at Proactive. She has over 15 years of experience covering the equity markets in North America, with a particular focus on junior resource stocks. Angela has reported from numerous countries around the world, including Canada, the US, Australia, Brazil, Ghana, and South Africa for leading trade publications. Previously, she worked in investor relations and led the foreign direct investment program in Canada for the Swedish government ...

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 date of this press release, the patient remains cancer-free and has reported no signi ...

About this content About Leo Grieco Leo joins us with a degree in Media Production from Bournemouth University. His work includes reporting for the UK editorial team and video editing for the broadcast team. He comes with an expertise in video editing and producing. Leo’s specialities include hospitality and leisure, support services, tech and video games. Read more About the publisher Proactive financial news and online broadcast teams provide fast, accessible, informative and actionable business and fi ...

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 and clinical investigator at the Weill Cornell Breast Center in New York City. "We are ...

About this content About Emily Jarvie Emily began her career as a political journalist for Australian Community Media in Hobart, Tasmania. After she relocated to Toronto, Canada, she reported on business, legal, and scientific developments in the emerging psychedelics sector before joining Proactive in 2022. She brings a strong journalism background with her work featured in newspapers, magazines, and digital publications across Australia, Europe, and North America, including The Examiner, The Advocate, ...

About this content About Emily Jarvie Emily began her career as a political journalist for Australian Community Media in Hobart, Tasmania. After she relocated to Toronto, Canada, she reported on business, legal, and scientific developments in the emerging psychedelics sector before joining Proactive in 2022. She brings a strong journalism background with her work featured in newspapers, magazines, and digital publications across Australia, Europe, and North America, including The Examiner, The Advocate, ...

About this content About Emily Jarvie Emily began her career as a political journalist for Australian Community Media in Hobart, Tasmania. After she relocated to Toronto, Canada, she reported on business, legal, and scientific developments in the emerging psychedelics sector before joining Proactive in 2022. She brings a strong journalism background with her work featured in newspapers, magazines, and digital publications across Australia, Europe, and North America, including The Examiner, The Advocate, ...

About this content About Emily Jarvie Emily began her career as a political journalist for Australian Community Media in Hobart, Tasmania. After she relocated to Toronto, Canada, she reported on business, legal, and scientific developments in the emerging psychedelics sector before joining Proactive in 2022. She brings a strong journalism background with her work featured in newspapers, magazines, and digital publications across Australia, Europe, and North America, including The Examiner, The Advocate, ...