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, 2026Ontario Physiotherapy Association listed by thegentlemenon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, Ontario Physiotherapy Association is reported in CA, a country with 278 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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Ontario Physiotherapy Association

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: CA
Sector: Healthcare
Listed on leak site: May 6, 2026

About the victim

AI dossier — public-source company profile

The Ontario Physiotherapy Association (OPA) is a non-profit, physiotherapist-led professional association representing over 5,500 physiotherapists, physiotherapist assistants, and students across Ontario, Canada. Founded over 60 years ago (circa 1964), it provides leadership, advocacy, professional development, and career support to its membership. Its mission is to ensure accessible, high-quality physiotherapy services throughout the province.

Industry: Physiotherapy Professional Association (Non-Profit Healthcare Advocacy)
Address: Ontario, Canada (precise street address not stated on public site)
Employees: 51-200
Founded: 1964

Attack summary

Severity: high — Data has been published (not merely threatened), meaning exfiltration is confirmed. The victim is a healthcare-sector professional association holding PII for over 5,500 regulated health professionals, including membership, financial, and personal data, constituting significant sensitive data exposure under Canadian privacy law (PIPEDA/PHIPA context).

The group 'thegentlemen' claims to have compromised OPA and has published data (disclosed status: data_published), indicating exfiltration of organisational data. No ransom amount or specific data volume was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Member personal information (physiotherapists, PTAs, students)
Organisational financial records
Internal communications
Professional development and course records
Membership data
Leadership and staff information

What the group claims

opa.on.ca zoominfo.com/c/ontario-physiotherapy-association/130548231 The Ontario Physiotherapy Association (OPA) is a non-profit, physiotherapist-led professional association representing over 5,500 physiotherapists, physiotherapist assistants (PTAs), and students across Ontario, Canada. Its core mission is to provide leadership, advocacy, professional development, and career support to ensure accessible, high-quality physiotherapy services throughout the province. Founded over 60 years ago, OPA has a well-documented history of advocacy wins — from expanding PT scopes of practice to supporting virtual care access and removing referral requirements from physicians

Sources

Victim siteopa.on.ca

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.