X0708 D/A LIVE 0002107894 Institutional Drilling Fund III LP 601 E. EXCHANGE AVE. SUITE 100 FORT WORTH TX TEXAS 76164 682-305-2868 DELAWARE None None Limited Partnership true 2026 N/A U.S. Energy Development Corporation 601 E. Exchange Ave. Suite 100 Fort Worth TX TEXAS 76164 Executive Officer Director Promoter Managing General Partner of the Issuer. Matthew P. Iak 601 E. Exchange Ave. Suite 100 Fort Worth TX TEXAS 76164 Executive Officer Director Promoter Officer and Director of the Managing General Partner of the Issuer. Jordan Jayson 601 E. Exchange Ave. Suite 100 Fort Worth TX TEXAS 76164 Executive Officer Director Promoter Officer and Director of the Managing General Partner of the Issuer. Oil and Gas No Revenues 06c true 0002107894-26-000001 2026-10-23 false true true Limited Partnership Interest. false 100000 250000000 100000 249900000 false 0 3750000 true 0 Dealer Manager Fee of 1.5%. 5000000 true 2.0% Expense Reimbursement Payment to the Managing General Partner. false Institutional Drilling Fund III LP /s/ Matthew P. Iak Matthew P. Iak President of Capital Markets of the Managing General Partner 2026-10-26