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AI brief of an SEC Form 8-K · Grayscale Bitcoin Mini Trust ETF (BTC)

Grayscale Bitcoin Mini Trust ETF to switch Bitcoin valuation index to CoinDesk Benchmark Rate April 1

Neutral Impact 3 of 5 other Written later

The sponsor of the Grayscale Bitcoin Mini Trust ETF said that starting April 1, 2026, the trust will value its Bitcoin for operational purposes, including net asset value, using the CoinDesk Bitcoin Benchmark Rate instead of the CoinDesk Bitcoin Price Index (XBX). The filing describes the new index's constituent trading platforms and methodology, and notes the index provider can change methodology without shareholder consent.

Key points

  • Index change effective April 1, 2026, from CoinDesk Bitcoin Price Index (XBX) to CoinDesk Bitcoin Benchmark Rate
  • Trust NAV and NAV per Share will be calculated using the new index price beginning April 1, 2026
  • Eleven constituent trading platforms listed as of March 16, 2026, including Binance, Kraken, Coinbase is not listed, and OKX
  • Index provider may change methodology without notice to or consent of the trust or its shareholders

The filing

CompanyGrayscale Bitcoin Mini Trust ETF (BTC)
Form8-K, current report
Filed with the SECMar 16, 2026, 4:19 PM ET
Accession number0001193125-26-108384

Items reported: 8.01 Other Events

Read the filing on SEC.gov ↗

Written by AI on Nov 9, 2026, 11:46 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on March 16, 2026.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.