Company: BTC
Filing Date: 2025-04-01
Form Type: POS AM
Source: 0001193125-25-070549
Chunk: 119

Company: Grayscale Bitcoin Mini Trust ETF
Filing Date: 2025-04-01
Form: POS AM
Chunk 119
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 of derivatives that are subject to counterparty and credit risks.                                                                                                                                                               |

| • |     | Safekeeping System. The Custodian has been appointed to control and secure the Bitcoin for the Trust using                                                                                                                       
 offline storage, or “cold storage”, mechanisms to secure the Trust’s private key “shards”. The hardware, software, administration and continued technological development that are used by the Custodian may not be available or 
 cost-effective for many investors.                                                                                                                                                                                               |

The Trust differentiates itself from many competing digital asset financial vehicles in the following ways:

| • |     | Custodian. The Custodian that holds the private key shards associated with the Trust’s Bitcoin is                                                     
 Coinbase Custody Trust Company, LLC. Other digital asset financial vehicles that use cold storage may not use a custodian to hold their private keys. |

| • |     | Cold Storage of Private Keys. The private key shards associated with the Trust’s Bitcoin are kept in                                                                                                                   
 cold storage, which means that the Trust’s Bitcoin are disconnected and/or deleted entirely from the internet. See “—Custody of the Trust’s Bitcoin” for more information relating to the storage and retrieval of the 
 Trust’s private keys to and from cold storage. Other digital asset financial vehicles may not utilize cold storage or may utilize less effective cold storage-related hardware and security protocols.                 |

| • |     | Location of Private Vaults. Private key shards associated with the Trust’s Bitcoin are distributed                                                                                                                           
 geographically by the Custodian in secure vaults around the world, including in the United States. The locations of the secure vaults may change regularly and are kept confidential by the Custodian for security purposes. |

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| • |     | Enhanced Security. Transfers from the Trust’s Vault Balance require certain security procedures,                                                                                                                                                         
 including but not limited to, multiple encrypted private key shards, usernames, passwords and 2-step verification. Multiple private key shards held by the Custodian must be combined to reconstitute the private                                        
 key to sign any transaction in order to transfer the Trust’s Bitcoin. Private key shards are distributed geographically in secure vaults around the world, including in the United States. As a result, if any one secure vault is ever compromised,     
 this event will have no impact on the ability of the Trust to access its assets, other than a possible delay in operations, while one or more of the other secure vaults is used instead. These security procedures are intended to remove single points 
 of failure in the protection of the