SCHEDULE 13G/A 0001750698 XXXXXXXX LIVE 2 Common stock, par value $ 0.000001 per share 06/30/2025 0001789769 Instil Bio, Inc. 45783C200 3963 Maple Avenue Suite 350 Dallas TX 75219 Rule 13d-1(c) Vivo Capital IX, LLC b DE 292743.00 0.00 292743.00 0.00 292743.00 N 4.5 OO The shares of common stock, par value $0.000001 per share (the "Common Stock") of Instil Bio, Inc. (the "Issuer") are held of record by Vivo Capital Fund IX, L.P. as of June 30, 2025. Vivo Capital IX, LLC is the general partner of Vivo Capital Fund IX, L.P. Based on 6,559,927 shares of Common Stock issued and outstanding as of May 9, 2025, as disclosed in the Issuer's Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission (the "SEC") on May 13, 2025. Vivo Capital Fund IX, L.P. b DE 292743.00 0.00 292743.00 0.00 292743.00 N 4.5 PN The shares of Common Stock of the Issuer are held of record by Vivo Capital Fund IX, L.P. as of June 30, 2025. Vivo Capital IX, LLC is the general partner of Vivo Capital Fund IX, L.P. Based on 6,559,927 shares of Common Stock issued and outstanding as of May 9, 2025, as disclosed in the Issuer's Quarterly Report on Form 10-Q, filed with the SEC on May 13, 2025. Instil Bio, Inc. 3963 Maple Avenue, Suite 350, Dallas, Texas 75219 Vivo Capital IX, LLC Vivo Capital Fund IX, L.P. 192 Lytton Avenue, Palo Alto, CA 94301 Vivo Capital IX, LLC, a Delaware limited liability company. Vivo Capital IX, LLC is the general partner of Vivo Capital Fund IX, L.P. Vivo Capital Fund IX, L.P., a Delaware limited partnership Y All securities are held of record by Vivo Capital Fund IX, L.P. Vivo Capital IX, LLC is the general partner of Vivo Capital Fund IX, L.P. 4.5% 292,743 shares 0 292,743 shares 0 N Y 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. Vivo Capital IX, LLC /s/ Frank Kung 08/12/2025 Vivo Capital Fund IX, L.P. /s/ Frank Kung 08/12/2025