Amendment No. 6 to the Index License Agreement dated March 1, 2025, between the Sponsor and Index Provider

Exhibit 10.6

AMENDMENT No. 6 TO

MASTER LICENSE AGREEMENT

This Amendment No. 6 (this “Amendment No. 6”) is effective as of March 1, 2025 (the “Amendment No. 6 Effective Date”) by and between CoinDesk Indices, Inc., a Delaware corporation, having its principal place of business at 169 Madison Ave, Suite 2635, New York, NY 10016 (“CDI”), and Grayscale Investments Sponsors, LLC, a Delaware limited liability company, with an office located at 290 Harbor Drive, Stamford, CT 06902 (“Licensee”). Unless otherwise defined herein, capitalized terms used herein have the meanings specified in or pursuant to the Agreement (defined below).

WHEREAS, CDI and the Licensee are parties to that certain Master Index License Agreement (“Master License Agreement”) dated as of January 31, 2022;

WHEREAS the Master License Agreement was previously amended by Amendment No. 1 to the Master License Agreement dated June 20, 2023 (“Amendment No. 1”), Amendment No. 2 to the Master License Agreement dated May 10, 2024 (“Amendment No. 2”), Amendment No. 3 to the Master License Agreement dated June 28, 2024 (“Amendment No. 3”), Amendment No. 4 to the Master License Agreement dated August 20, 2024 (“Amendment No. 4”) and Amendment No. 5 to the Master License Agreement dated January 29, 2025 (“Amendment No. 5”, and, collectively with Amendment No. 1, Amendment No.2, Amendment No. 3 and Amendment No. 4, the “Prior Amendments”);

WHEREAS, Order No. 1 as set out in Exhibit B of the Master License Agreement (as amended by the Prior Amendments), with an original start date of February 1, 2022, was not renewed pursuant to a notice of non-renewal sent by CDI to Licensee and expires on February 28, 2025; and

WHEREAS, CDI and Licensee desire to amend certain terms of the Master License Agreement (as amended by this Amendment No. 6, the “Agreement”) as set forth herein as of the Amendment No. 6 Effective Date.

NOW THEREFORE, the Parties hereby agree as follows:

CoinDesk Indices, Inc.

169 Madison Ave, Suite 2635

New York, NY 10016

Attention: Legal

E-mail: ***@*** with a copy to ***@***

[Signature Page Follows]

IN WITNESS WHEREOF, the Parties hereto have executed this Amendment No. 6 by their duly authorized representatives as of the Amendment No. 6 Effective Date set forth above.

Annex A

Order No. 2

This Order No. 2 (the “Order No. 2”) is entered into in connection with that certain Master Index License Agreement, by and between CoinDesk Indices, Inc. (“CDI”) and Grayscale Investments Sponsors, LLC (“Licensee”), dated January 31, 2022 (the “Master License Agreement”).

This Order No. 2 is incorporated by reference into the Master License Agreement as amended by Amendment No. 6 (the “Agreement”) and shall be governed by the terms set forth in the Agreement. To the extent of any conflict between this Order No. 2 and the Agreement, such term in this Order No. 2 shall prevail. Capitalized terms used but not defined herein have the meanings given to them in the Agreement.

Start Date: March 1, 2025

End Date: February 29, 2028

As part of the Services, CDI will provide Licensee with the licensed CDI indexes (“Licensed Indexes”) listed below via an application programming interface (“API”):

The Service will include CDI providing Licensee with the following:

[Signature Page Follows]

IN WITNESS WHEREOF, the Parties hereto by their duly authorized representatives have executed this Order No. 2 as of the Amendment No. 6 Effective Date set forth above.

Exhibit A

Long Form Disclaimer (e.g., financial product offering prospectus)

COINDESK® and [name of index/index family/trend indicator, e.g., “COINDESK BITCOIN PRICE INDEX”] (the “Index”) are trade or service marks of CoinDesk Indices, Inc. (with its affiliates, including CC Data Limited, “CDI”) and/or its licensors. CDI or CDI's licensors own all proprietary rights in the Data.

CDI is not the issuer or producer of [insert name of approved products] and has no responsibilities, obligations, or duties to investors in or holders of [insert name of approved product]. The Index is licensed for use by [insert name of the issuer or producer] as the issuer of [insert name of approved product]. The only relationship that CDI has with [insert name of the issuer or producer] in respect of [insert name of approved product] is the licensing of the Index, which is administered and published by CDI, or any successor thereto, without regard to the issuer of the [insert name of approved product] or the owners or holders of the [insert name of approved product].

Investors or holders acquire [insert name of approved product] from [insert name of the issuer or producer] and investors and holders neither acquire any interest in the Index nor enter into any relationship of any kind whatsoever with CDI upon making an investment in or acquisition of [insert name of approved product]. The [insert name of approved product] is not sponsored, endorsed, sold, or promoted by CDI. CDI makes no representation or warranty, express or implied, regarding the advisability of investing in or otherwise acquiring the [insert name of approved product] or the advisability of investing in securities or digital assets generally or the ability of the Index to track corresponding or relative market performance. CDI has not passed on the legality or suitability of the [insert name of approved product] with respect to any person or entity. CDI is not responsible for, nor has participated in, the determination of the timing of, prices at, or quantities of the [insert name of approved product] to be issued. CDI has no obligation to take the needs of the issuer or the owners or holders of the [insert name of approved product] or any other third party into consideration in administering, composing, calculating, or publishing the Index. CDI has no obligation or liability in connection with administration, marketing, or trading of the [insert name of approved product].

The licensing agreement between [insert name of the issuer or producer] and CDI is solely for the benefit of [insert name of the issuer or producer] and CDI and not for the benefit of the owners or holders of the [insert name of approved product] or any other third parties.

CDI SHALL HAVE NO LIABILITY TO THE ISSUER, INVESTORS, HOLDERS OR OTHER THIRD PARTIES FOR THE QUALITY, ACCURACY AND/OR COMPLETENESS OF THE INDEX OR ANY DATA INCLUDED THEREIN OR FOR INTERRUPTIONS IN THE DELIVERY OF THE DATA. CDI HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE INDEX OR ANY OTHERDATA INCLUDED THEREIN. CDI RESERVES THE RIGHT TO CHANGE THE METHODS OF CALCULATION OR PUBLICATION, OR TO CEASE THE CALCULATION OR PUBLICATION OF THE INDEX AND SHALL NOT BE LIABLE FOR ANY MISCALCULATION OF OR ANY INCORRECT, DELAYED, OR INTERRUPTED PUBLICATION WITH RESPECT TO THE INDEX. CDI SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING, WITHOUT LIMITATION, ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY LOST PROFITS, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH, RESULTING FROM THE USE OF THE INDEX OR ANY OTHER DATA INCLUDED THEREIN OR WITH RESPECT TO THE [INSERT NAME OF APPROVED PRODUCT].

Short Form Disclaimer (e.g., financial product fact sheets)

COINDESK® and [name of index/index family/trend indicator, e.g., “COINDESK BITCOIN PRICE INDEX”] (the “Index”) are trade or service marks of CoinDesk Indices, Inc. (with its affiliates, including CC Data Limited, “CDI”), and/or its licensors. CDI or CDI's licensors own all proprietary rights in the Index.

CDI is not affiliated with [insert name of issuer or producer] and does not approve, endorse, review, or recommend [insert name of approved product]. CDI does not guarantee the timeliness, accurateness, or completeness of any data or information relating to the Index and shall not be liable in any way to the [insert name of the issuer or producer], investors in or holders of [insert name of approved product] or other third parties in respect of the use or accuracy of the Index or any data included therein.