21Shares TDOG switches index provider to FTSE

21Shares Dogecoin ETF provided notice that it will terminate its licensing agreement with CF Benchmarks, effective August 31, 2026, and intends to enter a licensing agreement with FTSE International Limited on or about August 24, 2026.

Rhea-AI Filing Summary

21Shares Dogecoin ETF provided notice that it will terminate its licensing agreement with CF Benchmarks, effective August 31, 2026, and intends to enter a licensing agreement with FTSE International Limited on or about August 24, 2026. The Pricing Benchmark from CF Benchmarks currently is used to value the Trust’s shares and calculate its net asset value. The Sponsor described the change as part of a broader transition to a new benchmark provider; both CF Benchmarks and FTSE are stated as unaffiliated with the Sponsor. This Supplement attaches the Trust’s Form 8-K reporting the termination notice.

Insights

ETF Product Manager

Transitioning index provider will change the Trust's pricing source.

The filing states the Pricing Benchmark Licensing Agreement with CF Benchmarks will terminate effective August 31, 2026, and the Sponsor intends to license FTSE index data on or about August 24, 2026. The Pricing Benchmark is used to value the Trust’s shares and calculate NAV.

The operational impact depends on index methodology and implementation timing; users should review future disclosures for any methodology differences, cutover procedures, or reconciliation timelines that could affect intraday indicative values.

Securities Counsel

Notice and replacement license are contractual and disclosed in the 8-K.

The Sponsor provided timely notice under the existing agreement and disclosed the intended FTSE license. Both licensors are described as unaffiliated with the Sponsor, and the prospective FTSE license is described with an initial one-year term and automatic renewals.

Material legal qualifiers include the effective termination date and the Sponsor’s stated intent to enter the FTSE license; any remaining contractual obligations or transition covenants should appear in subsequent filings or exhibits.

Key Figures

Form 8-K date: June 30, 2026 Notice date: June 30, 2026 Termination effective: August 31, 2026 +3 more

6 metrics

Form 8-K date June 30, 2026 Date of report disclosed in the Supplement

Notice date June 30, 2026 Sponsor provided notice to CF Benchmarks

Termination effective August 31, 2026 Effective date of termination of Pricing Benchmark Licensing Agreement

FTSE license expected On or about August 24, 2026 Sponsor intends to enter licensing agreement with FTSE

Prospectus date January 9, 2026 Prospectus to which this Supplement relates

Registration number 333-286456 Registration number on the Supplement cover

Key Terms

Pricing Benchmark Licensing Agreement, net asset value, sub-licensing arrangement

3 terms

Pricing Benchmark Licensing Agreement regulatory

"the termination, effective August 31, 2026, of the licensing agreement (the “Pricing Benchmark Licensing Agreement”)"

net asset value financial

"used to value the Trust’s shares on a daily basis and to calculate the Trust’s net asset value"

Net asset value is the total value of an investment fund's assets minus any liabilities, divided by the number of shares or units outstanding. It represents the per-share worth of the fund, similar to how the value of a house is determined by its total worth after debts are subtracted. Investors use it to gauge the true value of their holdings and to compare different investment options.

sub-licensing arrangement legal

"the Trust using the Pricing Benchmark pursuant to a sub-licensing arrangement with the Sponsor"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did 21Shares Dogecoin ETF (TDOG) file on July 7, 2026?

The Trust filed a Form 8-K reporting notice to terminate the CF Benchmarks licensing agreement. The filing states termination is effective August 31, 2026, and the Sponsor attached the Report to this prospectus supplement dated July 7, 2026.

When will the CF Benchmarks licensing agreement end for TDOG?

The Sponsor provided notice that the Pricing Benchmark Licensing Agreement will terminate effective August 31, 2026. The notice date in the filing is June 30, 2026, as reflected in the attached Form 8-K.

Who will replace CF Benchmarks as the index provider for TDOG?

The Sponsor intends to enter a licensing agreement with FTSE International Limited, expected on or about August 24, 2026. The filing states FTSE is unaffiliated with the Sponsor and is experienced in digital asset indices.

How is the Pricing Benchmark used by the Trust (TDOG)?

The filing states the Pricing Benchmark is used to value the Trust’s shares on a daily basis and to calculate the Trust’s net asset value. The Benchmark is calculated and administered by the licensor named in the agreement.

Are CF Benchmarks and FTSE affiliated with the Sponsor?

No. The filing explicitly states both CF Benchmarks and FTSE are unaffiliated with the Sponsor, as disclosed in the Form 8-K attached to the Supplement.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/07/2026 - 05:22 PM Learn about SEC filing dates

Filed pursuant to Rule 424(b)(3)

Registration No. 333-286456

21SHARES DOGECOIN ETF

SUPPLEMENT NO. 4 DATED JULY 7, 2026

TO THE PROSPECTUS DATED JANUARY 9, 2026

This prospectus supplement (this “Supplement”) is part of and should be read in conjunction with the prospectus of 21Shares Dogecoin ETF (the “Trust”), dated January 9, 2026 (the “Prospectus”). Unless otherwise defined herein, capitalized terms used in this Supplement shall have the same meanings as in the Prospectus.

The purpose of this Supplement is to include the Trust’s Current Report on Form 8-K filed on July 7, 2026.

Current Report on Form 8-K

On July 7, 2026, the Trust filed its Current Report on Form 8-K (the “Report”) with the Securities and Exchange Commission. The Report (without exhibits) is attached to this Supplement.

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): June 30, 2026

21SHARES DOGECOIN ETF

(Exact name of registrant as specified in its charter)

Maryland		001-43049		33-7038007
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

158 W. 27th Street
New York, New York		10001
(Address of principal executive offices)		(zip code)

Registrant’s telephone number, including area code: (646) 370-6016

(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:

☐ Written communications 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))

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

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Shares of Beneficial Interest of 21Shares Dogecoin ETF		TDOG		The Nasdaq Stock Market LLC

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. ☐

Item 1.02 Termination of a Material Definitive Agreement.

Benchmark Licensing Agreements

On June 30, 2026, 21Shares US LLC (the “Sponsor”) provided notice to CF Benchmarks Ltd. (“CF Benchmarks”) of the termination, effective August 31, 2026, of the licensing agreement (the “Pricing Benchmark Licensing Agreement”) between the Sponsor and CF Benchmarks relating to the use of the CF Dogecoin-Dollar US Settlement Price Index (the “Pricing Benchmark”) by the Sponsor, 21Shares Dogecoin ETF (the “Trust”), and their affiliates. Pursuant to the Pricing Benchmark Licensing Agreement, CF Benchmarks provides each of the Sponsor, the Trust, and their affiliates a non-exclusive, non-transferable, non-sub-licensable, perpetual, worldwide license to access, view and use the Pricing Benchmark to develop, create, calculate, settle, maintain or support and market the Trust, with the Trust using the Pricing Benchmark pursuant to a sub-licensing arrangement with the Sponsor. The Pricing Benchmark Licensing Agreement has a one-year initial term and automatically renews for successive one-year periods unless terminated pursuant to its terms. The Pricing Benchmark is calculated and administered by CF Benchmarks and is used to value the Trust’s shares on a daily basis and to calculate the Trust’s net asset value. CF Benchmarks is unaffiliated with the Sponsor. The Sponsor has elected to terminate the Pricing Benchmark Licensing Agreement pursuant to its terms in connection with its broader transition to a new benchmark provider, as further described below.

The Sponsor intends to enter into a licensing agreement with FTSE International Limited (“FTSE”) on or about August 24, 2026 whereby FTSE will provide each of the Sponsor, the Trust, and their affiliates a non-exclusive, non-transferable, non-sub-licensable, perpetual, worldwide license to access, view and use FTSE index data to develop, create, calculate, settle, maintain or support and market the Trust. Such license is expected to have a one-year initial term and will automatically be renewed for successive one-year periods, unless terminated pursuant to its terms.

FTSE is a company incorporated and registered in England, and its principal offices are located at 10 Paternoster Square, London, EC4M 7LS, United Kingdom. FTSE is experienced in calculating and administering digital asset indices. FTSE is unaffiliated with the Sponsor.

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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.

Dated: July 7, 2026	21SHARES DOGECOIN ETF
	21Shares US LLC, as Sponsor of 21Shares Dogecoin ETF
	By:	/s/ Duncan Moir
	Name:	Duncan Moir
	Title:	President

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