Gregory Mumford has served as Chief Financial Officer of Cipher Digital since October 2025. From December 2019 to September 2025, he held several senior positions at Keefe, Bruyette & Woods (KBW), including Director and leader of the Digital Assets & Infrastructure group within the Investment Banking division, where he advised on M&A and capital markets transactions focused on digital infrastructure and industrial companies.
Prior to KBW, Mumford held various roles in commercial and corporate banking at one of Canada's largest banks. He brings over a decade of experience in financial services, credit, and capital markets. He holds a Bachelor of Commerce from McMaster University and is a CFA Charterholder.
Biography extracted from Cipher Mining DEF 14A filed 2026-04-20 View cached copy (2026-08-31)Live source ↗
Roles
Contiguous filings for the same role are collapsed into a single tenure span. Click a row to see the underlying filings.
| Company | Role | Tenure | Filings |
|---|---|---|---|
| Cipher Mining | Chief Financial Officer | 2026-03 → present (6mo) | 2 |
Show 2 underlying filings | |||
Compensation
| Year | Role as filed | Salary | Bonus | Stock awards | Total | Source |
|---|---|---|---|---|---|---|
| 2025 | — | $108.0K | $400.0K | $7.04M | $7.54M | View cached copy (2026-08-31)Live source ↗ |
As reported in the company's DEF 14A Summary Compensation Table (SEC Reg S-K Item 402(c)). Stock and option awards are grant-date fair values — what the award was worth on the day it was granted, not cash received and not what it is worth now. Every row here reconciles: its columns add up to the total the filing printed.
Insider transactions
Totals for this person
| Bucket | Invested (shares) | Invested (USD) | Divested (shares) | Divested (USD) | Net direction | Txns | Invested @ last price | Divested @ last price |
|---|---|---|---|---|---|---|---|---|
| All time | 68,432 | $0 | 14,009 | $260.5K | ↓ Divested $260.5K | 6 | $1.21M | $248.5K |
| 2026 | 68,432 | $0 | 14,009 | $260.5K | ↓ Divested $260.5K | 6 | $1.21M | $248.5K |
| 2026-Q1 | 34,216 | $0 | 7,114 | $91.6K | ↓ Divested $91.6K | 3 | $607.0K | $126.2K |
| 2026-Q2 | 34,216 | $0 | 6,895 | $168.9K | ↓ Divested $168.9K | 3 | $607.0K | $122.3K |
Invested = shares acquired (buys, grants, option exercises) — insider adding to the position. Divested = shares reduced (sells, dispositions, tax-withholding) — cash flowing TO the insider. Net direction shows which side wins on dollar terms in each bucket. % of holder's stake not yet computed (pending Form 3/4 holdings ingest). See methodology. The two @ last price columns restate the same share counts at the most recent share price we read (close of 2026-09-04); they are a valuation, not a cash flow, and they move every day the market does.
All transactions
| Date | Company | Kind | Shares | Amount (USD) | Value @ last price |
|---|---|---|---|---|---|
| 2026-06-30 | Cipher Mining | Option / RSU exercise | 17,108 | - | $303.5K |
| 2026-06-30 | Cipher Mining | Tax withholding on vesting | 6,895 | $168,928 | $122.3K |
| 2026-06-30 | Cipher Mining | Option / RSU exercise · Restricted Stock Units | 17,108 | - | $303.5K |
| 2026-03-31 | Cipher Mining | Option / RSU exercise | 17,108 | - | $303.5K |
| 2026-03-31 | Cipher Mining | Tax withholding on vesting | 7,114 | $91,557 | $126.2K |
| 2026-03-31 | Cipher Mining | Option / RSU exercise · Restricted Stock Units | 17,108 | - | $303.5K |