Helzberg
bd_fcefc09214f42d67 · schema v1 · pii pii-v1
Full breach record for Helzberg →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Coinbasecartel on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Source: Ransomware.live
Post text · scraped from the leak site
Helzberg Diamonds is a American retail jewelry company headquartered in North Kansas City, Missouri. Founded in 1915, it operates a chain of jewelry stores across the United States, selling diamonds, engagement rings, wedding bands, and fine jewelry. The company is a subsidiary of Berkshire Hathaway, having been acquired in 1995. Helzberg operates hundreds of retail locations in shopping malls and centers nationwide.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Apr 12, 2026
Claim posted
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No filing yet · watching
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
coinbasecartel
According to ransomware.live, CoinbaseCartel specializes in data acquisition through system access and strategic partnerships. It focus exclusively on data exfiltration—our operations never involve system encryption or operational disruption.