United States Commodity Index Funds Trust

06/29/2026 | Press release | Distributed by Public on 06/29/2026 06:23

Regulation FD Presentation (Form 8-K)

Exhibit 99.1

United States Commodity Index Funds Trust

United States Commodity Index Fund

Monthly Account Statement

For the Month Ended May 31, 2026

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Commodity Futures $ 3,539,263
Unrealized Gain (Loss) on Market Value of Commodity Futures (12,135,759 )
Dividend Income 898,413
Interest Income 239,422
ETF Transaction Fees 700
Total Income (Loss) $ (7,457,961 )
Expenses
Management Fees $ 261,093
Professional Fees 37,388
Brokerage Commissions 15,495
Directors' Fees and Insurance 7,599
Total Expenses $ 321,575
Net Income (Loss) $ (7,779,536 )
Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 5/1/26 $ 378,899,982
Additions (50,000 Shares) 5,049,000
Withdrawals (50,000 Shares) (4,928,617 )
Net Income (Loss) (7,779,536 )
Net Asset Value End of Month $ 371,240,829
Net Asset Value Per Share (3,800,000 Shares) $ 97.69

To the Shareholders of United States Commodity Index Fund:

Pursuant to Rule 4.22(h) under the Commodity Exchange Act, the undersigned represents that, to the best of his knowledge and belief, the information contained in the Account Statement for the month ended May 31, 2026 is accurate and complete.

/s/ Stuart P. Crumbaugh
Stuart P. Crumbaugh

Chief Financial Officer

United States Commodity Funds LLC, Sponsor of United States Commodity Index Fund

United States Commodity Funds LLC

1850 Mt. Diablo Boulevard, Suite 640

Walnut Creek, CA 94596

United States Commodity Index Funds Trust

United States Copper Index Fund

Monthly Account Statement

For the Month Ended May 31, 2026

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Commodity Futures $ 2,178,787
Unrealized Gain (Loss) on Market Value of Commodity Futures 44,382,760
Dividend Income 1,774,281
Interest Income 516,237
ETF Transaction Fees 4,550
Total Income (Loss) $ 48,856,615
Expenses
Management Fees $ 422,970
Professional Fees 50,616
Brokerage Commissions 1,990
Directors' Fees and Insurance 13,123
Total Expenses $ 488,699
Net Income (Loss) $ 48,367,916
Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 5/1/26 $ 700,526,921
Additions (2,250,000 Shares) 87,871,608
Withdrawals (650,000 Shares) (24,702,265 )
Net Income (Loss) 48,367,916
Net Asset Value End of Month $ 812,064,180
Net Asset Value Per Share (20,900,000 Shares) $ 38.8 5

To the Shareholders of United States Copper Index Fund:

Pursuant to Rule 4.22(h) under the Commodity Exchange Act, the undersigned represents that, to the best of his knowledge and belief, the information contained in the Account Statement for the month ended May 31, 2026 is accurate and complete.

/s/ Stuart P. Crumbaugh
Stuart P. Crumbaugh

Chief Financial Officer

United States Commodity Funds LLC, Sponsor of United States Copper Index Fund

United States Commodity Funds LLC

1850 Mt. Diablo Boulevard, Suite 640

Walnut Creek, CA 94596

United States Commodity Index Funds Trust

Monthly Account Statement

For the Month Ended May 31, 2026

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Commodity Futures $ 5,718,050
Unrealized Gain (Loss) on Market Value of Commodity Futures 32,247,001
Dividend Income 2,672,694
Interest Income 755,659
ETF Transaction Fees 5,250
Total Income (Loss) $ 41,398,654
Expenses
Management Fees $ 684,063
Professional Fees 88,004
Brokerage Commissions 17,485
Directors' Fees and Insurance 20,722
Total Expenses $ 810,274
Net Income (Loss) $ 40,588,380
Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 5/1/26 $ 1,079,426,903
Additions (2,300,000 Shares) 92,920,608
Withdrawals (700,000 Shares) (29,630,882 )
Net Income (Loss) 40,588,380
Net Asset Value End of Month $ 1,183,305,009

To the Shareholders of the Series of the United States Commodity Index Funds Trust:

Pursuant to Rule 4.22(h) under the Commodity Exchange Act, the undersigned represents that, to the best of his knowledge and belief, the information contained in the Account Statement for the month ended May 31, 2026 is accurate and complete.

/s/ Stuart P. Crumbaugh
Stuart P. Crumbaugh

Chief Financial Officer

United States Commodity Funds LLC, Sponsor of United States Commodity Index Funds Trust

United States Commodity Funds LLC

1850 Mt. Diablo Boulevard, Suite 640

Walnut Creek, CA 94596

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