---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-075990"
form_type: "8-K"
ticker: "ARKB"
cik: "0001869699"
company_name: "Ark 21Shares Bitcoin ETF"
filed_at: "2026-07-07T20:32:13+00:00"
generated_at: "2026-07-07T20:33:03.897651+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# ARK 21Shares Bitcoin ETF to switch pricing benchmark from CF Benchmarks to FTSE

## Summary
- Terminated licensing agreement with CF Benchmarks for CME CF Bitcoin Reference Rate—New York Variant, effective Aug 31, 2026.
- Sponsor intends to enter licensing agreement with FTSE International Limited around Aug 24, 2026 for FTSE index data.
- FTSE will provide non-exclusive license for use in developing, calculating, and marketing the Trust.
- Change is part of a broader transition to a new benchmark provider; FTSE is unaffiliated with Sponsor.
- FTSE is experienced in digital asset indices; license expected to have one-year initial term with auto-renewal.

## SEC filing metadata
- accession: 0001213900-26-075990
- form_type: 8-K
- ticker: ARKB
- cik: 0001869699
- company_name: Ark 21Shares Bitcoin ETF
- filed_at: 2026-07-07T20:32:13+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1869699/000121390026075990/0001213900-26-075990-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1869699/000121390026075990/ea0296648-8k_ark21share.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-075990
- JSON: https://secwatch.observer/filing/0001213900-26-075990.json
- Plain text: https://secwatch.observer/filing/0001213900-26-075990.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.