X0708 D LIVE 0002141734 Thirdbase Opportunity LP - Series ER III 535 W 23RD STREET UNIT SPH1P NEW YORK NY NEW YORK 10011 7169810061 DELAWARE None None Limited Partnership true 2026 Abhinav Gupta 535 W 23rd Street Unit SPH1P New York NY NEW YORK 10011 Executive Officer Promoter Managing Member of the General Partner of the Issuer n/a Thirdbase Capital GP, LLC 535 W 23rd Street Unit SPH1P New York NY NEW YORK 10011 Promoter General Partner of the Issuer Pooled Investment Fund Private Equity Fund false Decline to Disclose 06b 3C 3C.1 false 2026-06-09 false true false 100000 31000000 31000000 0 false 3 0 0 0 false Thirdbase Opportunity LP - Series ER III /s/ Abhinav Gupta Abhinav Gupta Managing Member of the General Partner of the Issuer 2026-06-22