---
schema_version: "secwatch.filing_event.v1"
accession: "0001819989-25-000095"
form_type: "8-K"
ticker: "CIFR"
cik: "0001819989"
company_name: "Cipher Digital Inc."
filed_at: "2025-10-06T23:59:59+00:00"
generated_at: "2026-05-17T04:37:13.883027+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Cipher Mining CFO Ed Farrell to retire Oct 14; Gregory Mumford named successor

## Summary
- Ed Farrell retires as CFO effective Oct 14, 2025; will serve as Senior Advisor through Apr 17, 2026.
- Gregory Mumford appointed CFO effective Oct 14; previously senior banker at KBW's Digital Assets & Infrastructure group.
- Mumford receives $500k base salary, sign-on equity of 375,000 RSUs vesting over 3 years, discretionary bonus.
- Farrell's advisory agreement includes continued base salary, health coverage, and acceleration of earned unvested equity.
- CEO Tyler Page thanked Farrell and highlighted Mumford's transformative deal experience.

## SEC filing metadata
- accession: 0001819989-25-000095
- form_type: 8-K
- ticker: CIFR
- cik: 0001819989
- company_name: Cipher Digital Inc.
- filed_at: 2025-10-06T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819989/000181998925000095/0001819989-25-000095-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819989/000181998925000095/cifr-20251006.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001819989-25-000095
- JSON: https://secwatch.observer/filing/0001819989-25-000095.json
- Plain text: https://secwatch.observer/filing/0001819989-25-000095.txt

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