The United States Commodity Index Funds Trust (the Trust) filed its annual 10-K report for the fiscal year ended December 31, 2025, detailing the performance of its two series: United States Commodity Index Fund (USCI) and United States Copper Index Fund (CPER). USCI's Net Asset Value (NAV) per share increased by 17.32% to $77.48 in 2025, outperforming its SummerHaven Dynamic Commodity Index Total Return (SDCI) benchmark by 0.22%. CPER's NAV per share surged by 38.09% to $34.84 in 2025, outperforming its SummerHaven Copper Index Total Return (SCI) benchmark by 0.87%. The Trust's total assets grew significantly to $761,114,365 in 2025 from $334,931,201 in 2024. Net income for the Trust was $118,796,502 in 2025, a substantial increase from $27,408,912 in 2024. Both funds primarily invest in futures contracts and hold significant portions of assets in short-term U.S. Treasuries, cash, and cash equivalents. USCF, the sponsor, manages the Trust and its series, with SummerHaven Investment Management, LLC providing advisory services. Several legal proceedings and regulatory settlements involving USCF, its related funds (like USO), and service providers (RBC Capital, Marex, SummerHaven) are disclosed, some of which are ongoing.