USCI and CPER furnish September 2025 account statements (Ex. 99.1)

Rhea-AI Filing Summary

United States Commodity Index Funds Trust reported that its series funds — United States Commodity Index Fund (USCI) and United States Copper Index Fund (CPER) — issued their monthly account statements for the month ended September 30, 2025. The statements, presented as Statements of Income (Loss) and Statements of Changes in Net Asset Value under Rule 4.22, are furnished as Exhibit 99.1 and available at www.uscfinvestments.com. The information is furnished, not filed, under Regulation FD.

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 COMMISION

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): October 28, 2025

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 October 28, 2025, 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 September 30, 2025, 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:	October 28, 2025	By:	/s/ Stuart P. Crumbaugh
		Name:	Stuart P. Crumbaugh
		Title:	Chief Financial Officer

FAQ

What did CPER disclose in the 8-K?

The trust reported that CPER and USCI issued monthly account statements for the month ended September 30, 2025, furnished as Exhibit 99.1.

Which funds are covered by this update from CPER (NYSE Arca: CPER)?

The update covers United States Copper Index Fund (CPER) and United States Commodity Index Fund (USCI).

Where can investors find the September 2025 monthly statements for USCI and CPER?

They are furnished as Exhibit 99.1 and available on www.uscfinvestments.com.

Under what rule are the monthly statements prepared?

They are presented under Rule 4.22 of the Commodity Exchange Act as Statements of Income (Loss) and Statements of Changes in Net Asset Value.

Is the information considered filed with the SEC?

No. The information, including Exhibit 99.1, is furnished under Regulation FD and is not deemed filed.

What exchanges and tickers are listed for the funds?

USCI and CPER are listed on NYSE Arca with tickers USCI and CPER, respectively.