Cipher Digital Inc.
A U.S. data center developer and operator, Cipher Digital builds and runs large-scale facilities for high-performance computing and artificial intelligence work, hosting tenants like Amazon Web Services. It began in 2021 as Cipher Mining, a Bitcoin mining company backed by hardware maker Bitfury, and went public that year through a merger with a special purpose acquisition company. The name comes from "cipher," the cryptography at the heart of blockchain, and the company rebranded as Cipher Digital in 2026 after shifting from mining to data center infrastructure.
Sold 30.43M
Sold 40.07M
Granted 13.68M · Sold 72.5K
Sold 552.6K
Granted 4.06M · Sold 423.7K
Granted 4.06M · Sold 526.1K
Granted 2.82M
Granted 167.1K
Granted 235.1K
Granted 226.8K · Sold 31.3K
Granted 147.2K
Granted 235.1K · Bought 25.0K · Sold 315.0K
Granted 235.1K · Sold 106.5K
Granted 235.1K · Sold 111.4K
Granted 12.2K
Granted 17.1K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Bitfury Group Ltd +4 co-filers10% owner · 45 transactions | — | 1.17Bas of Nov 2024 | — | — | 30.43M |
| Bitfury Group Ltd +4 co-filers10% owner · 71 transactions | — | 1.16B | — | — | 40.07M |
| Bitfury Group Ltd +3 co-filers10% owner · 1 transaction | — | 203.11Mas of Apr 2022 | — | — | — |
| Page TylerChief Executive Officer, Director · 52 transactions | — | 10.09M | 13.68M | — | 72.5K |
| Glazer Paul J +1 co-filer10% owner · 13 transactions | — | 1.81Mas of Mar 2021 | — | — | 552.6K |
| Iwaschuk WilliamCo-President and CLO · 45 transactions | — | 1.54M | 4.06M | — | 423.7K |
| Kelly Patrick ArthurCo-President and COO · 54 transactions | — | 1.53M | 4.06M | — | 526.1K |
| Farrell Edward JChief Financial Officer · 26 transactions | — | 1.48M | 2.82M | — | — |
| Dykes Robert R BDirector · 13 transactions | — | 1.10Mas of Sep 2024 | 167.1K | — | — |
| Long CaitlinDirector · 10 transactions | — | 235.1K | 235.1K | — | — |
| Evans Holly MorrowDirector · 11 transactions | — | 195.5K | 226.8K | — | 31.3K |
| Wurth Douglas ClarkDirector · 2 transactions | — | 195.0Kas of Mar 2021 | — | — | — |
| Zeidman Fred SCEO, Director · 1 transaction | — | 195.0Kas of Mar 2021 | — | — | — |
| Flatley RobertDirector · 6 transactions | — | 147.2K | 147.2K | — | — |
| Grossman Cary MDirector · 20 transactions | — | 143.8K | 235.1K | 25.0K | 315.0K |
| Newsome James EDirector · 15 transactions | — | 128.5K | 235.1K | — | 106.5K |
| Williams Wesley HastieDirector · 14 transactions | — | 123.7K | 235.1K | — | 111.4K |
| Duda Thomas DavidDirector · 2 transactions | — | 65.5K | 12.2K | — | — |
| Fratamico PaulDirector · 1 transaction | — | 47.5Kas of Mar 2021 | — | — | — |
| Lendrum John J IIIDirector · 1 transaction | — | 47.5Kas of Mar 2021 | — | — | — |
| Pauker David IDirector · 1 transaction | — | 47.5Kas of Mar 2021 | — | — | — |
| Rehmatullah TahiraDirector · 1 transaction | — | 47.5Kas of Mar 2021 | — | — | — |
| Mumford Gregory J.D.Chief Financial Officer · 2 transactions | — | 17.1K | 17.1K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -72.61M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.