X0202 SCHEDULE 13G 0001301396 XXXXXXXX LIVE Common Stock, $0.0001 par value per share 06/04/2026 0001728117 Gossamer Bio, Inc. 38341P102 3115 MERRYFIELD ROW SUITE 120 SAN DIEGO CA 92121 Rule 13d-1(c) Context Capital Management, LLC DE 0.00 48835788.00 0.00 48835788.00 48835788.00 9.9 IA OO Michael S. Rosen X1 0.00 48835788.00 0.00 48835788.00 48835788.00 9.9 HC IN William D. Fertig X1 0.00 48835788.00 0.00 48835788.00 48835788.00 9.9 HC IN Charles E. Carnegie X1 0.00 48835788.00 0.00 48835788.00 48835788.00 9.9 HC IN Context Partners Master Fund, L.P. E9 0.00 48835788.00 0.00 48835788.00 48835788.00 9.9 PN Gossamer Bio, Inc. 3115 MERRYFIELD ROW, SUITE 120, SAN DIEGO, CALIFORNIA, 92121. Context Capital Management, LLC ("LLC") Michael S. Rosen ("Rosen") William D. Fertig ("Fertig") Charles E. Carnegie ("Carnegie") Context Partners Master Fund, L.P. ("LP") LLC is the general partner and investment adviser of LP. Rosen, Fertig and Carnegie are the control persons of LLC. The reporting persons are filing this Schedule 13G jointly, but not as members of a group, and each disclaims membership in a group. Each reporting person also disclaims beneficial ownership of the securities reported in this Schedule 13G, except to the extent of that person?s pecuniary interest therein. In addition, the filing of this Schedule 13G on behalf of LP should not be construed as an admission that it is, and it disclaims that it is, a beneficial owner, as defined in Rule 13d-3 under the Act, of any of the securities covered by this Schedule 13G. Context Capital Management, LLC 7724 Girard Avenue Suite 300 La Jolla, CA 92037 See cover page for each reporting person. Y See items 5-9 and 11 of the cover page for each reporting person. See items 5-9 and 11 of the cover page for each reporting person. The shares beneficially owned by the Reporting Persons reported in this Schedule 13G consists of 48,835,788 shares held by the Reporting Persons. The percentages reported in the Schedule 13G are based on 488,846,722 shares outstanding as of June 5, 2026, as reported by the Issuer (254,150,441 shares issued on June 4, 2026, as reported on the 8-K reported on June 3, 2026, plus the 234,696,281 shares outstanding previously reported on the 10-Q as of the quarterly period ended March 31, 2026). To clarify, the Form line 11 is limited to displaying only the tenth decimal place, but the ownership limitation prescribed in the agreement is 9.99%. See items 5-9 and 11 of the cover page for each reporting person. See items 5-9 and 11 of the cover page for each reporting person. See items 5-9 and 11 of the cover page for each reporting person. See items 5-9 and 11 of the cover page for each reporting person. Y N Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Exhibit 1 - Joint Filing Statement Context Capital Management, LLC Michael S. Rosen 06/08/2026 Michael S. Rosen Michael S. Rosen 06/08/2026 William D. Fertig William D. Fertig 06/08/2026 Charles E. Carnegie Charles E. Carnegie 06/08/2026 Context Partners Master Fund, L.P. Michael S. Rosen 06/08/2026