[8-K] United States Commodity Index Funds Trust Reports Material Event

Rhea-AI Filing Summary

United States Commodity Index Funds Trust furnished monthly statements for March 2026 covering United States Commodity Index Fund (USCI) and United States Copper Index Fund (CPER).

USCI generated net income of $35,923,320, lifting its net asset value (NAV) from $307,540,572 at March 1 to $347,986,922, or $95.34 per share on 3,650,000 shares. Results were driven by realized trading gains of $22,687,259 and unrealized gains of $12,515,211 on commodity futures, with relatively modest expenses of $284,945.

CPER recorded a net loss of $63,819,671 as large unrealized losses of $72,406,651 on copper-related futures outweighed realized gains and income. CPER’s NAV declined from $871,789,392 to $713,562,786, with NAV per share at $34.31 on 20,800,000 shares after significant share withdrawals.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): April 29, 2026

UNITED STATES COMMODITY INDEX FUNDS TRUST

(Exact name of registrant as specified in its charter)

Delaware	001-34833	27-1537655
(State or other jurisdiction	(Commission File Number)	(I.R.S. Employer
of incorporation)		Identification No.)

	1850 Mt. Diablo Boulevard, Suite 640
	Walnut Creek, California 94596
(510) 522-9600	(Address of principal executive offices) (Zip Code)
Registrant's telephone number, including area code

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered:
Shares of United States Commodity Index Fund		USCI		NYSE Arca, Inc.
Shares of United States Copper Index Fund		CPER		NYSE Arca, Inc.

Item 7.01. Regulation FD Disclosure.

On April 29, 2026, United States Commodity Index Funds Trust (the “Registrant”), and United States Commodity Index Fund (“USCI”) and United States Copper Index Fund (“CPER”), each a series of the Registrant, issued their monthly account statements for the month ended March 31, 2026, which are presented in the form of Statements of Income (Loss) and Statements of Changes in Net Asset Value, as required pursuant to Rule 4.22 under the Commodity Exchange Act. A copy of the monthly account statements is furnished as Exhibit 99.1 to this Current Report on Form 8-K and also can be found on USCI’s and CPER’s website at www.uscfinvestments.com. The information furnished in this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in any such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit 99.1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

		UNITED STATES COMMODITY INDEX FUNDS TRUST
		By:	United States Commodity Funds LLC, its sponsor
Date:	April 29, 2026	By:	/s/ Stuart P. Crumbaugh
		Name:	Stuart P. Crumbaugh
		Title:	Chief Financial Officer

Exhibit 99.1

United States Commodity Index Funds Trust

United States Commodity Index Fund

Monthly Account Statement

For the Month Ended March 31, 2026

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Commodity Futures		$	22,687,259
Unrealized Gain (Loss) on Market Value of Commodity Futures			12,515,211
Dividend Income			644,590
Interest Income			360,855
ETF Transaction Fees			350
Total Income (Loss)		$	36,208,265
Expenses
Management Fees		$	227,058
Professional Fees			30,030
Brokerage Commissions			22,353
Directors' Fees and Insurance			5,504
Total Expenses		$	284,945
Net Income (Loss)		$	35,923,320

Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 3/1/26		$	307,540,572
Additions (50,000 Shares)			4,523,030
Net Income (Loss)			35,923,320
Net Asset Value End of Month		$	347,986,922
Net Asset Value Per Share (3,650,000 Shares)		$	95.34

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 March 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 March 31, 2026

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Commodity Futures		$	6,691,375
Unrealized Gain (Loss) on Market Value of Commodity Futures			(72,406,651	)
Dividend Income			1,798,318
Interest Income			586,242
ETF Transaction Fees			2,100
Total Income (Loss)		$	(63,328,616	)
Expenses
Management Fees		$	439,227
Professional Fees			39,931
Brokerage Commissions			1,891
Directors' Fees and Insurance			10,006
Total Expenses		$	491,055
Net Income (Loss)		$	(63,819,671	)

Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 3/1/26		$	871,789,392
Additions (100,000 Shares)			3,543,065
Withdrawals (2,900,000 Shares)			(97,950,000	)
Net Income (Loss)			(63,819,671	)
Net Asset Value End of Month		$	713,562,786
Net Asset Value Per Share (20,800,000 Shares)		$	34.31

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 March 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 March 31, 2026

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Commodity Futures		$	29,378,634
Unrealized Gain (Loss) on Market Value of Commodity Futures			(59,891,440	)
Dividend Income			2,442,908
Interest Income			947,097
ETF Transaction Fees			2,450
Total Income (Loss)		$	(27,120,351	)
Expenses
Management Fees		$	666,285
Professional Fees			69,961
Brokerage Commissions			24,244
Directors' Fees and Insurance			15,510
Total Expenses		$	776,000
Net Income (Loss)		$	(27,896,351	)

Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 3/1/26		$	1,179,329,964
Additions (150,000 Shares)			8,066,095
Withdrawals (2,900,000 Shares)			(97,950,000	)
Net Income (Loss)			(27,896,351	)
Net Asset Value End of Month		$	1,061,549,708

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 March 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

FAQ

How did United States Commodity Index Fund (USCI) perform in March 2026?

USCI posted strong net income of $35,923,320 for March 2026. Net asset value rose to $347,986,922, or $95.34 per share, mainly from realized and unrealized gains on commodity futures with relatively low expenses.

What were the March 2026 results for United States Copper Index Fund (CPER)?

CPER reported a net loss of $63,819,671 for March 2026. Large unrealized losses of $72,406,651 on commodity futures drove its NAV down to $713,562,786, with NAV per share at $34.31 on 20,800,000 shares.

How did CPER’s net asset value change during March 2026?

CPER’s net asset value fell from $871,789,392 at March 1 to $713,562,786 at month-end. The decline reflected substantial unrealized losses on commodity futures and net share withdrawals totaling $97,950,000 for 2,900,000 shares.

What was USCI’s net asset value per share at March 31, 2026?

USCI’s net asset value per share was $95.34 at March 31, 2026. This figure is based on total NAV of $347,986,922 and 3,650,000 shares outstanding, after recognizing March net income and additions of 50,000 shares.

What are the key income components for USCI and CPER in March 2026?

For March 2026, USCI’s income included realized trading gains of $22,687,259 and unrealized gains of $12,515,211. CPER recorded realized trading gains of $6,691,375 but unrealized losses of $72,406,651, plus dividend and interest income for both funds.

Where can investors access the full March 2026 account statements for USCI and CPER?

The March 2026 account statements for USCI and CPER are furnished as Exhibit 99.1 to the Form 8-K. They are also available on the funds’ website at www.uscfinvestments.com for investor review.

Filing Exhibits & Attachments

5 documents

Press Releases

• EX-99.1 EXHIBIT 99.1 42.7 KB

Other Documents

• EX-101 XBRL TAXONOMY EXTENSION SCHEMA 3.7 KB
• EX-101 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE 26.0 KB
• EX-101 XBRL TAXONOMY EXTENSION LABEL LINKBASE 35.8 KB
• EX-101 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE 24.6 KB