ARK 21Shares Bitcoin ETF (ARKB), launched on January 11, 2024, holds 48,360 BTC as of April 30, 2025, valued at $4.06 billion at $84,000/BTC. It is managed by 21Shares US LLC, sponsored by ARK Investment Management, listed on Cboe BZX with a 0.21% management fee, and uses Coinbase Custody Trust for Bitcoin storage.