X0708 D LIVE 0002132995 Octagon Biotech Opportunities Fund II LP 654 MADISON AVENUE, FL. 21 NEW YORK NY NEW YORK 10065 212-369-2829 DELAWARE None None Limited Partnership true 2026 n/a Octagon Investments GP, LLC 654 Madison Avenue, 21st Floor New York NY NEW YORK 10065 Director Promoter General Partner of the Issuer (the "General Partner") n/a Octagon Capital Advisors LP 654 Madison Avenue, 21st Floor New York NY NEW YORK 10065 Promoter Investment Manager of the Issuer (the "Investment Manager") Dr. Ting Jia 654 Madison Avenue, 21st Floor New York NY NEW YORK 10065 Executive Officer Managing Member of the General Partner and the Investment Manager Pooled Investment Fund Private Equity Fund false Decline to Disclose 06b 3C 3C.7 false 2026-06-24 false true false 5000000 175000000 17800000 157200000 false 5 0 0 0 true Certain persons named in Item 3 or affiliate(s) thereof may receive payments deemed made from the proceeds of the offering, including management fees. The amounts of such payments cannot be estimated at this time. false Octagon Biotech Opportunities Fund II LP /s/ Ting Jia Ting Jia Managing Member of the General Partner 2026-07-02