Grayscale Bitcoin Mini Trust ETF Files 8-K

TL;DR

Grayscale Bitcoin Mini Trust ETF filed an 8-K on 9/26/25, likely related to a material agreement or financials.

AI Summary

Grayscale Bitcoin Mini Trust ETF filed an 8-K on September 26, 2025, reporting on the entry into a material definitive agreement and financial statements. The filing pertains to the Grayscale Bitcoin Mini Trust ETF, formerly known as Grayscale Bitcoin Trust (BTC), with its principal executive offices located at c/o Grayscale Investments, LLC in Stamford, CT.

Why It Matters

This filing indicates significant corporate actions or agreements for the Grayscale Bitcoin Mini Trust ETF, which could impact its structure, operations, or financial reporting.

Risk Assessment

Risk Level: low — This is a routine SEC filing (8-K) reporting on corporate events, not a direct market event or financial distress.

Key Numbers

• 001-42194 — SEC File Number (Identifies the specific SEC filing for the company.)
• 99-6383052 — IRS Employer Identification No. (Tax identification number for the entity.)

Key Players & Entities

• Grayscale Bitcoin Mini Trust ETF (company) — Registrant
• Grayscale Investments, LLC (company) — Administrative Address
• Grayscale Bitcoin Trust (BTC) (company) — Former Company Name
• September 25, 2025 (date) — Date of earliest event reported
• September 26, 2025 (date) — Filing Date

FAQ

Filing Documents

• btc-20250926.htm (8-K) — 56KB
• btc-ex10_1.htm (EX-10.1) — 427KB
• btc-ex10_2.htm (EX-10.2) — 25KB
• img56901171_0.jpg (GRAPHIC) — 39KB
• 0001193125-25-220479.txt ( ) — 737KB
• btc-20250926.xsd (EX-101.SCH) — 27KB
• btc-20250926_htm.xml (XML) — 5KB

01 Entry into a Material Definitive Agreement

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

01 Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 10.1 Master Custody Service Agreement, dated August 8, 2025, between the Trust and Anchorage Digital Bank N.A. 10.2 Second Amendment to Master Custody Service Agreement, dated September 25, 2025, between the Trust and Anchorage Digital Bank N.A. 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the inline XBRL document)

SIGNATURES

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 thereunto duly authorized. Grayscale Investments Sponsors, LLC, as Sponsor of Grayscale Bitcoin Mini Trust ETF Date: September 26, 2025 By: /s/ Edward McGee Name: Edward McGee Title: Chief Financial Officer* * The Registrant is a trust and the identified person signing this report is signing in their capacity as an authorized officer of Grayscale Investments Sponsors, LLC, the Sponsor of the Registrant.

View Full Filing

View this 8-K filing on SEC EDGAR