ATOSSA THERAPEUTICS, INC.

As of May 6, 2024, there was a total of approximately 169,284,727 shares of Common Stock issued and outstanding or reserved for future issuance, consisting of the following: (i) 125,757,416 shares of Common Stock issued and outstanding, (ii) 16,685,797 shares of Common Stock reserved for potential issuance upon the exercise of options that have previously been granted, (iii) 165,341 shares of Common Stock reserved for potential issuance upon the conversion of 582 shares of Series B Convertible Preferred Stock, (iv) 5,465,423 shares of Common Stock reserved for issuance for future grants under the 2020 Plan (not including the additional 12,000,000 shares subject to Proposal 3), and (v) 21,210,750 shares of Common Stock reserved for issuance upon the exercise of outstanding warrants. This represents a share utilization of 97% of our currently authorized Common Stock and leaves only approximately 5,715,273 shares of Common Stock available for future issuance.