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 $879.1M across reported positions.

"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.

Disclosed Exposure

$879.09M

Companies

2

Total Filings

10

Lifetime Open-Market Net

-$1.27B

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
CIFR	10%+ Owner	60,170,249	$14.61	$879.09M	-$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

Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.

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

Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.