---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-24-029619"
form_type: "8-K"
ticker: "IBIT"
cik: "0001980994"
company_name: "iShares Bitcoin Trust ETF"
filed_at: "2024-09-19T23:59:59+00:00"
generated_at: "2026-05-31T03:46:28.777930+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# iShares Bitcoin Trust ETF amends Coinbase Prime Broker Agreement for withdrawal processing

## Summary
- Amendment shortens withdrawal processing time to 12 hours on Custodial Account as long as unpaid Trade Credit is covered by combined Trading and Vault Balance.
- Agreement updated to require that, while Trade Credits remain unpaid, withdrawals to blockchains are allowed only if equivalent amount remains in aggregate of Trading and Vault Balance.
- Amendment effective September 16, 2024, between BlackRock Fund Advisors (for iShares Bitcoin Trust ETF) and Coinbase entities.
- Changes affect Exhibit A (Custodial Services) and Exhibit D (Committed Trade Financing) of the Prime Broker Agreement.

## SEC filing metadata
- accession: 0001437749-24-029619
- form_type: 8-K
- ticker: IBIT
- cik: 0001980994
- company_name: iShares Bitcoin Trust ETF
- filed_at: 2024-09-19T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1980994/000143774924029619/0001437749-24-029619-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1980994/000143774924029619/bit20240918_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-24-029619
- JSON: https://secwatch.observer/filing/0001437749-24-029619.json
- Plain text: https://secwatch.observer/filing/0001437749-24-029619.txt

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