First Dental Health
bd_6eb4b451f675cf53 · schema v1 · pii pii-v2
Full breach record for First Dental Health →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Thegentlemen 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
firstdentalhealth.com First Dental Health, Inc. dental consulting company founded in 1995 and based in Sacramento, California. It is led by Chairman and CEO Michael Zhang together with founder Dr. Rick Kershner, a periodontist who previously worked with Western Dental, Coast Dental and Pacific Dental Services. The company transforms existing dental practices of 40 to 250 chairs through leadership development, culture building and operational excellence, typically raising performance by 40 to 80 percent within 2 to 4 years. Its flagship case is Sacramento Dentistry Group, which grew from around 330000 dollars monthly revenue in 2014 to roughly 640000 dollars by 2023. It also runs a DSO consolidation model that merges 6 to 10 practices under one brand with owners keeping equity and a 3 to 7 year exit path. The team has built 14 companies that made the Inc. 5000 list, positioning it as a small but high-impact operator in US dental business consulting.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Oct 16, 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.
thegentlemen
According to ransomware.live, The Gentlemen is a RaaS group that emerged in July–August 2025, rapidly claiming over 320 victims across 17+ countries by offering affiliates a 90% revenue share, deploying a Go-based locker against Windows, Linux, NAS, and BSD systems; a compromised C2 server in 2026 revealed more than 1,570 linked victims.