---
schema_version: "secwatch.filing_event.v1"
accession: "0001564590-21-051435"
form_type: "8-K"
ticker: "GBTC"
cik: "0001588489"
company_name: "Grayscale Bitcoin Trust ETF"
filed_at: "2021-10-21T23:59:59+00:00"
generated_at: "2026-06-28T19:13:24.417764+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# DCG increases Grayscale Bitcoin Trust share buyback authorization to $1B

## Summary
- DCG authorized purchase of up to $1B of GBTC shares, a $250M increase from prior $750M authorization.
- As of Oct 19, 2021, DCG has purchased $388M worth of GBTC shares under the authorization.
- DCG will use cash on hand and buy shares on open market at management's discretion under Rule 10b-18.
- The authorization does not obligate DCG to buy any specific number of shares and may be modified or discontinued.
- Purchases will not occur while the Trust is in private placement activities or just before such activities.

## SEC filing metadata
- accession: 0001564590-21-051435
- form_type: 8-K
- ticker: GBTC
- cik: 0001588489
- company_name: Grayscale Bitcoin Trust ETF
- filed_at: 2021-10-21T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1588489/000156459021051435/0001564590-21-051435-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1588489/000156459021051435/gbtc-8k_20211020.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001564590-21-051435
- JSON: https://secwatch.observer/filing/0001564590-21-051435.json
- Plain text: https://secwatch.observer/filing/0001564590-21-051435.txt

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