---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-089976"
form_type: "8-K"
ticker: "GTAO"
cik: "0002029297"
company_name: "Grayscale Bittensor Trust (TAO)"
filed_at: "2026-03-04T23:59:59+00:00"
generated_at: "2026-05-15T21:52:26.777890+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Grayscale Bittensor Trust (TAO) changes NAV valuation index to CoinDesk Bittensor Benchmark Rate effective March 6, 2026

## Summary
- As of March 6, 2026, Trust's NAV per share will be calculated using CoinDesk Bittensor Benchmark Rate (previously Coin Metrics Real-Time Rate).
- Index provider CoinDesk selects constituent trading platforms based on criteria including market quality, security, legal/regulatory, KYC, data, transparency, team, and negative events.
- Index algorithm uses volume weighting, FX conversion, outlier detection, inactivity adjustment, and manipulation resistance; recalculation every 5 seconds over 24-hour period.
- If Index becomes unavailable, Sponsor will cascade to Secondary Index (Coin Metrics Real-Time Rate), Tertiary Pricing Option (principal market), or good faith estimate.

## SEC filing metadata
- accession: 0001193125-26-089976
- form_type: 8-K
- ticker: GTAO
- cik: 0002029297
- company_name: Grayscale Bittensor Trust (TAO)
- filed_at: 2026-03-04T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2029297/000119312526089976/0001193125-26-089976-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2029297/000119312526089976/tao-20260304.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-089976
- JSON: https://secwatch.observer/filing/0001193125-26-089976.json
- Plain text: https://secwatch.observer/filing/0001193125-26-089976.txt

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