Company: BTC
Filing Date: 2025-09-26
Form Type: 8-K
Source: 0001193125-25-220479
Chunk: 0

Company: Grayscale Bitcoin Mini Trust ETF
Filing Date: 2025-09-26
Form: 8-K
Item: Item 1.01
Chunk 0
---
Item 1.01 Entry into a Material Definitive Agreement.

On September 25, 2025, Grayscale Investments Sponsors, LLC, the sponsor (the “ Sponsor”) of Grayscale Bitcoin Mini Trust ETF (the “ Trust”), and Anchorage Digital Bank N. A. (“ Anchorage Digital”), a national trust bank chartered by the Office of the Comptroller of the Currency, entered into a certain Second Amendment to Master Custody Service Agreement (the “ Second Amendment”), which provides that the Trust is added as a party to a certain Master Custody Service Agreement, dated as of August 8, 2025 (and together with the Second Amendment, the “ Anchorage Digital Custodian Agreement” or the “ Agreement”).

Pursuant to the Anchorage Digital Custodian Agreement, Anchorage Digital will provide services related to custody and safekeeping of the Trust’s Bitcoin holdings.

The Sponsor expects to utilize Anchorage Digital’s services to custody a portion of the Trust’s Bitcoin. The Trust’s existing custody arrangement with Coinbase Trust Company, LLC (“ Coinbase”) is unaffected by the Trust’s entry into the Agreement, and Coinbase remains the Trust’s primary custodian. The Sponsor shall, in its sole discretion, determine the amounts held at either custodian as permitted by the Trust Agreement. At the current time, the Sponsor has not determined the amount of the Trust’s Bitcoin it will move to Anchorage Digital. The addition of Anchorage Digital reflects the Sponsor’s ongoing risk management approach as part of the Trust’s growing size. References to “the Custodian” in our annual report on Form 10-K for the fiscal period ended December 31, 2024 will be deemed to refer to Coinbase, Anchorage Digital and/or other Custodians, collectively or in their individual capacities, as the context may require.

Under the Anchorage Digital Custodian Agreement, Anchorage Digital is required to keep all of the private keys associated with the Trust’s Bitcoin held at Anchorage Digital in cold storage. Cold storage is a safeguarding method by which the private key(s) corresponding to Bitcoin is (are) generated and stored in an offline manner. Private keys are generated in offline computers or devices that are not connected to the internet so that they are more resistant to being hacked. By contrast, in hot storage, the private keys are held online, where they are more accessible, leading to more efficient transfers, though they are potentially more vulnerable to being hacked.

In the event of a fork of the Bitcoin blockchain, the Anchorage Digital