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- Kraken Made Up 43.470% (new) — The index is highly concentrated in a single exchange, making the Trust's NAV vulnerable to issues at Kraken.
- None of the Constituent Exchanges Are Currently Registered With the SEC (new) — The index relies on price data from unregistered venues, increasing manipulation and technical risk.
Ark 21Shares Bitcoin ETF (ARKB) files 424B3 prospectus after switching pricing index to FTSE Bitcoin Index
Filed August 27, 2026 · ~1 min read
Key Changes
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ARKB is a bitcoin ETF tracking the CME CF Bitcoin Reference Rate – New York Variant, with a 0.21% sponsor fee.
Prospectus Summary verify on EDGAR → -
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On August 27, 2026, the Trust changed its pricing index from the Prior Index to the FTSE Bitcoin Index, introducing methodology and constituent exchange differences that may affect NAV.
Risk Factors verify on EDGAR → -
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The new index uses a 15-second VWAP over a 60-minute window, while the prior index used volume-weighted medians; these differences may cause material NAV differences.
Risk Factors verify on EDGAR →
4 more material changes behind this preview — plus the full narrative summary, section-by-section diffs against the prior filing, and verbatim quotes with EDGAR citations.
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Figures/quotes linked to EDGAR · Narrative written by AI · Aug 31, 2026 · How we verify