Bitfury Holding B.V.
CIK 1887853 · last filed 2026-06-04
Bitfury Holding B.V. is a corporate insider who has filed 10 SEC Form 4 insider transactions across 2 companies since 2024. The most recent filing, for CIFR, was dated Jun 4, 2026. Across all open-market trades the lifetime net is −$1.27B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $540.3M across reported positions. The firm reports its address in Amsterdam, Noord-Holland. 47 SEC filings were submitted jointly with Bitfury Group Ltd.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
CIFRW price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
AMSTERDAM, NOORD-HOLLAND 1077 ZX
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CIFR | 10%+ Owner | 60,170,249 | $8.98 | $540.33M | -$239.56M | 1 | 2026-06-04 |
| Cipher Digital Inc. (CIFRW) Delisted | 10%+ Owner | 64,544,650 | $4.09 | $263.99M | -$1.03B | 9 | 2025-10-16 |
Recent Filings
10 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-04 | CIFR | Mixed | −9,000,000 | -$239.56M | EDGAR |
| 2025-10-16 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −22,679,215 | -$473.13M | EDGAR |
| 2025-09-22 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −13,500,000 | -$166.54M | EDGAR |
| 2025-09-17 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −13,500,000 | -$152.01M | EDGAR |
| 2025-09-04 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −6,000,000 | -$49.29M | EDGAR |
| 2024-12-18 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −2,750,000 | -$20.12M | EDGAR |
| 2024-10-29 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −5,000,000 | -$31.10M | EDGAR |
| 2024-09-10 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −28,997,640 | -$82.98M | EDGAR |
| 2024-07-22 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −4,357,455 | -$27.07M | EDGAR |
| 2024-06-21 | Cipher Digital Inc. (CIFRW) Delisted | Sell (S) | −5,996,585 | -$29.64M | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.