secwatch.observer — SEC 8-K summary
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Issuer:     Ark 21Shares Bitcoin ETF (ARKB)
CIK:        0001869699
Form:       8-K
Filed at:   2026-08-26T20:11:51+00:00
Accession:  0001213900-26-093966
Event type: other_material
Sentiment:  neutral
Materiality: 0.40
Item codes: 1.01, 5.03, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

ARK 21Shares Bitcoin ETF switches benchmark to FTSE Bitcoin Index, changes sponsor fee timing
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- Effective Aug 27, 2026, Trust will value shares and calculate NAV using FTSE Bitcoin Index, replacing CME CF Bitcoin Reference Rate - NY Variant.
- Sponsor fee payment changes from weekly to at least quarterly in arrears, payable in bitcoin, per Amendment No. 1 to Sponsor Agreement.
- Second Amended and Restated Trust Agreement dated Aug 26, 2026 reflects benchmark change and fee timing; other changes ministerial.
- Benchmark Licensing Agreement with FTSE International Limited dated Aug 20, 2026; one-year initial term, auto-renewal.
- Prior notice of termination of CF Benchmarks license given June 30, 2026, effective Aug 31, 2026.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1869699/000121390026093966/0001213900-26-093966-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1869699/000121390026093966/ea0303132-8k_ark21shares.htm
  HTML page:      https://secwatch.observer/filing/0001213900-26-093966

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer