---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-414207"
form_type: "8-K"
ticker: "GTAO"
cik: "0002029297"
company_name: "Grayscale Bittensor Trust (TAO)"
filed_at: "2026-10-05T20:28:36+00:00"
generated_at: "2026-10-12T14:51:53.505277+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.62
calibrated_materiality_score: 0.62
confidence: "high"
source: SEC EDGAR
---

# Grayscale Bittensor Trust adds Coinbase as additional custodian, terminates prior BitGo agreement

## Summary
- On September 30, 2026, Grayscale Bittensor Trust (TAO) became party to an amended BitGo Custodial Services Agreement; its prior March 12, 2025 BitGo agreement was terminated.
- On September 29, 2026, Sponsor and Coinbase, Inc. amended the Coinbase Prime Broker Agreement to add the Trust; Coinbase will custody a portion of the Trust's TAO.
- BitGo remains the Trust's primary custodian; the Sponsor has not determined how much TAO it will move to Coinbase, and Coinbase custody is part of risk management as the Trust grows.
- Exhibits 10.1-10.4 include the amended BitGo and Coinbase agreements; Kathryn Masci, Interim CFO of Grayscale Investments Sponsors, LLC, signed on October 5, 2026.

## SEC filing metadata
- accession: 0001193125-26-414207
- form_type: 8-K
- ticker: GTAO
- cik: 0002029297
- company_name: Grayscale Bittensor Trust (TAO)
- filed_at: 2026-10-05T20:28:36+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.62
- calibrated_materiality_score: 0.62
- confidence: high
- sec_items: 1.01, 1.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2029297/000119312526414207/0001193125-26-414207-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2029297/000119312526414207/gtao-20260930.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-414207
- JSON: https://secwatch.observer/filing/0001193125-26-414207.json
- Plain text: https://secwatch.observer/filing/0001193125-26-414207.txt

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