secwatch.observer — SEC 8-K summary
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Issuer:     Grayscale Bitcoin Trust ETF (GBTC)
CIK:        0001588489
Form:       8-K
Filed at:   2025-06-25T23:59:59+00:00
Accession:  0000950170-25-089983
Event type: other_material
Sentiment:  neutral
Materiality: 0.20
Item codes: 8.01
LLM model:  deepseek-v4-flash:cloud@v2

Grayscale Bitcoin Trust adds Bitfinex to CoinDesk Bitcoin Price Index
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- CoinDesk Indices added Bitfinex to the XBX index effective June 22, 2025.
- No trading platforms were removed in the scheduled quarterly review.
- Constituent platforms now: Coinbase, Kraken, Bitstamp, Crypto.com, LMAX Digital, Bullish, Bitfinex.
- Index Provider may change venues or calculation method at any time.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1588489/000095017025089983/0000950170-25-089983-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1588489/000095017025089983/gbtc-20250622.htm
  HTML page:      https://secwatch.observer/filing/0000950170-25-089983

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