---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-111688"
form_type: "8-K"
ticker: "ARKB"
cik: "0001869699"
company_name: "Ark 21Shares Bitcoin ETF"
filed_at: "2026-10-22T20:01:24+00:00"
generated_at: "2026-10-22T20:02:05.820484+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# 21Shares terminates ARK sub-advisory pact for ARKB; ETF to rename to 21Shares Bitcoin ETF with ticker TBIT

## Summary
- Sponsor 21Shares US LLC gave notice on Oct 16, 2026 terminating the Support Services Agreement with ARK Investment Management LLC, effective December 22, 2026.
- Under the agreement ARK provided sub-advisory services and marketing assistance to the Trust; the Sponsor terminated it "pursuant to its terms." No termination fees or cost terms were disclosed.
- On Dec 15, 2026 the Trust will be renamed "21Shares Bitcoin ETF" (from ARK 21Shares Bitcoin ETF) and its Cboe BZX ticker will change from ARKB to TBIT.
- No replacement sub-adviser or marketing provider was named, and the filing gives no reason for the termination beyond the contractual right.
- Filing signed Oct 22, 2026 by Duncan Moir, President of 21Shares US LLC, as Sponsor of the Trust.

## SEC filing metadata
- accession: 0001213900-26-111688
- form_type: 8-K
- ticker: ARKB
- cik: 0001869699
- company_name: Ark 21Shares Bitcoin ETF
- filed_at: 2026-10-22T20:01:24+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1869699/000121390026111688/0001213900-26-111688-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1869699/000121390026111688/ea0309236-8k_ark21shares.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-111688
- JSON: https://secwatch.observer/filing/0001213900-26-111688.json
- Plain text: https://secwatch.observer/filing/0001213900-26-111688.txt

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