The United States Commodity Index Funds Trust has issued its monthly account statements for the month ending May 31, 2026, for its series, the United States Commodity Index Fund (USCI) and the United States Copper Index Fund (CPER). USCI reported a net loss of $(7,779,536) for May 2026, primarily driven by an unrealized loss on commodity futures of $(12,135,759), partially offset by realized trading gains and dividend/interest income. CPER reported a net income of $48,367,916 for May 2026, significantly boosted by an unrealized gain on commodity futures of $44,382,760. The total net asset value for USCI decreased to $371,240,829 from $378,899,982 at the beginning of the month. The total net asset value for CPER increased to $812,064,180 from $700,526,921 at the beginning of the month. The filing includes statements of income (loss) and changes in net asset value for both funds.