Company: BTC
Filing Date: 2025-04-01
Form Type: POS AM
Source: 0001193125-25-070549
Chunk: 177

Company: Grayscale Bitcoin Mini Trust ETF
Filing Date: 2025-04-01
Form: POS AM
Chunk 177
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 Description of the Prime Broker Agreement The Prime Broker Agreement establishes the rights and responsibilities of the Custodian, the Prime Broker, the Sponsor and the Trust with respect to the Trust’s Bitcoin which is held in accounts maintained and operated by the Custodian, as a fiduciary with respect to the Trust’s assets, and the Prime Broker (together with the Custodian, the “Custodial Entities”) on behalf of the Trust. For a general description of the Custodian’s obligations, see “—Service Providers of the Trust—The Custodian and Prime Broker.” 108

Account; Location of Bitcoin

All of the Trust’s Bitcoin, other than that which is credited to a settlement balance maintained with the Prime Broker (the
“Settlement Balance”), is held in custody accounts maintained on the books of the Custodian, as to which the Custodian controls the private keys which allow for the transfer of ownership or control of the Trust’s Bitcoin on the
Trust’s behalf (the “Vault Balance”). The Prime Broker Agreement provides that the Trust’s Vault Balance will be held by the Custodian in segregated wallets or accounts. The Custodian will keep all of the private keys associated
with the Trust’s Bitcoin held in the Vault Balance in an offline manner. The term “cold storage” refers to a safeguarding method where the storage of private keys may involve keeping such keys’ materials on a non-networked computer or electronic device or storing the private keys on a storage device. Cold storage is a safeguarding method with multiple layers of protections and protocols, by which the private keys
corresponding to the Trust’s Bitcoin are generated and stored in an offline manner. The term “hot storage” refers to the safeguarding method by which the private keys are held online, where they are more accessible, leading to more
efficient transfers, though they are potentially more vulnerable to theft, loss or damage.

Additionally, at the Sponsor’s
discretion, a portion of the Trust’s Bitcoin holdings may be credited to the Settlement Balance, which will be reflected in a ledger maintained on the books of the Prime Broker. The Prime Broker Agreement provides that any Bitcoin credited to
the Trust’s Settlement Balance will be held (i) in omnibus cold storage wallets; (ii) in omnibus hot storage wallets; or (iii) in omnibus accounts with one of the third-party venues to which Coinbase has established connections
(each, a “Coinbase Connected Venue”). The Settlement Balance shall be separate from the Vault Balance and any other account(s) the