Form 4 Filing for ATOSSA THERAPEUTICS, INC.

This filing reports a grant of restricted stock units (RSUs) to Steven C. Quay, President & CEO of ATOSSA THERAPEUTICS, INC. The RSUs, representing a contingent right to receive one share of the Issuer's Common Stock, will vest in three equal annual installments starting on the first anniversary of March 26, 2026. The reported number of securities has been adjusted to reflect a one-for-fifteen reverse stock split effected on February 2, 2026. Additionally, the filing details holdings in Ensisheim Partners, LLC, which is wholly owned by Mr. Quay and Dr. Shu-Chih Chen, who share voting and investment power over the securities held by Ensisheim. Mr. Quay disclaims beneficial ownership of these securities except to the extent of his pecuniary interest.