Disclosure context

About thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 424 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post May 18, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

May 6, 2026FMS listed by thegentlemenon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, FMS is reported in US, a country with 2,713 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

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FMS

Claimed by thegentlemen · listed 15 days ago

14d

Age

since listed · data leaked

Status timeline

Listed
May 6, 2026
Data leaked

At a glance

Group: thegentlemen
Status: Data leaked
Country: US
Sector: Not Found
Listed on leak site: May 6, 2026

About the victim

AI dossier — public-source company profile

FMS, Inc. is a privately held American software company founded in 1986 by Luke Chung, headquartered in Vienna, Virginia, near Washington DC. The company is the world's leading developer of productivity and developer tools for Microsoft Access, SQL Server, Visual Studio .NET, and Visual Basic, serving tens of thousands of customers across 100+ countries including 90 of the Fortune 100 and every US federal government department. FMS also offers custom software development consulting and its Sentinel Visualizer link analysis product, used by intelligence and law enforcement agencies.

Industry: Enterprise Software Development & Consulting (Microsoft Access / SQL Server Tools)
Address: Vienna, Virginia, United States
Founded: 1986

Attack summary

Severity: high — Data has been published (not merely threatened), and FMS serves every US federal government department plus 90 of the Fortune 100, as well as intelligence and law enforcement agencies via Sentinel Visualizer. Exfiltration and publication of data from a vendor with such sensitive government and enterprise clientele constitutes significant business and potentially sensitive operational data exposure.

The group 'thegentlemen' claims to have attacked FMS, Inc. and has published data (disclosed status: data_published). No specific ransom amount or data size was stated, but the disclosure indicates exfiltration and publication of company data.

high

Data the group says was taken

AI dossier — extracted from the leak post

Published company data (unspecified contents)

What the group claims

fmsinc.com zoominfo.com/c/fms-inc/14729979 FMS, Inc. is a privately held American software company founded in 1986 by Luke Chung (Harvard graduate), headquartered in Vienna, Virginia, near Washington DC. The company is the world's leading developer of tools for Microsoft Access, and a top vendor for SQL Server, Visual Studio .NET, and Visual Basic communities, with tens of thousands of customers across 100+ countries, including 90 of the Fortune 100 and every US federal government department. FMS is a Microsoft Gold Certified Partner, has won over 40 industry awards, and is recognized as one of the SD Times Top 100 most innovative software firms. It also offers custom software development consulting and its own Sentinel Visualizer link analysis product, used by intelligence and law enforcement agencies

Sources

Victim sitefmsinc.com

Source

Indexed 15 days ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.