Key Takeaways
- • ARK 21Shares Bitcoin ETF (ARKB) transitions from the CME CF Bitcoin Reference Rate—New York Variant to the FTSE Bitcoin Index effective August 27, 2026, following a licensing agreement signed August 20, 2026.
- • The new benchmark licensing agreement with FTSE carries a one-year initial term with automatic annual renewals, providing contractual continuity for index administration and ETF valuation methodology.
- • The prior licensing agreement with CF Benchmarks terminates August 31, 2026, with formal notice issued June 30, 2026, marking a clean operational transition between index providers.
- • The sponsor fee structure remains at 0.21%, now payable in bitcoin, reflecting the fund's native asset alignment and operational efficiency under the new index framework.
Summary
ARK 21Shares Bitcoin ETF has executed a strategic benchmark transition, adopting the FTSE Bitcoin Index as its official pricing and valuation benchmark. The shift, formalized through a Benchmark Licensing Agreement signed August 20, 2026, becomes effective August 27, 2026. This transition replaces the fund's prior reliance on the CME CF Bitcoin Reference Rate—New York Variant, which the ETF had used since inception to track bitcoin performance.
The licensing arrangement with FTSE International provides a one-year initial term with automatic annual renewal provisions, establishing a standardized framework for ongoing index administration and ETF operations. This contractual structure ensures continuity in benchmark methodology while preserving optionality for either party to reassess the arrangement on an annual basis. The termination of the CME CF benchmark agreement follows a formal notice period, with the prior contract expiring August 31, 2026—four days after the FTSE index takes effect—allowing minimal operational friction during the handoff.
The timing reflects deliberate planning by ARK and 21Shares to minimize disruption to fund shareholders and market operations. The prospectus has been updated to reflect the benchmark change, and the fund's sponsor fee structure remains anchored at 0.21%, now denominated and paid in bitcoin rather than fiat currency. This design choice aligns fee collection with the fund's underlying asset, reducing currency conversion friction and strengthening the link between sponsor economics and bitcoin market performance. The transition consolidates FTSE's role as the institutional-grade index provider for the fund's operations while maintaining the ETF's core mission of tracking bitcoin exposure.
The licensing arrangement with FTSE International provides a one-year initial term with automatic annual renewal provisions, establishing a standardized framework for ongoing index administration and ETF operations. This contractual structure ensures continuity in benchmark methodology while preserving optionality for either party to reassess the arrangement on an annual basis. The termination of the CME CF benchmark agreement follows a formal notice period, with the prior contract expiring August 31, 2026—four days after the FTSE index takes effect—allowing minimal operational friction during the handoff.
The timing reflects deliberate planning by ARK and 21Shares to minimize disruption to fund shareholders and market operations. The prospectus has been updated to reflect the benchmark change, and the fund's sponsor fee structure remains anchored at 0.21%, now denominated and paid in bitcoin rather than fiat currency. This design choice aligns fee collection with the fund's underlying asset, reducing currency conversion friction and strengthening the link between sponsor economics and bitcoin market performance. The transition consolidates FTSE's role as the institutional-grade index provider for the fund's operations while maintaining the ETF's core mission of tracking bitcoin exposure.
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