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Listed on a ransomware leak site

Sigma

sigma.fr

Sigma was listed on the The Gentlemen leak site on Jul 14, 2025. Information as of Oct 19, 2026.

Country: FranceIndustry: Consulting
Updated continuously · figures as of Oct 19, 2026
Claimed by
The Gentlemen
First listed
Jul 14, 2025
Claims recorded
1

Leak-Site Claim.

The GentlemenConfirmed claim
Posted on the leak site
Jul 14, 2025
Collected by Brandefense
Sep 9, 2025
Data claimed
Not stated
Leak-site post text, written by the group
[removed] [removed] diteur de logiciels, intégrateur de solutions digitales et infogéreur de clouds hybrides: le groupe Sigma concrétise votre transformation digitale. Sigma est fière d’être l’une des toutes premières grandes entreprises du numérique à inscrire ses engagements environnementaux, sociaux et économiques dans ses statuts.

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The GentlemenMXMexicoHealthcareNot stated
Wellington College International School Bangkok
wellingtoncollege.ac.th
The GentlemenTHThailandEducation and ResearchNot stated
Ecuadors National Police
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The GentlemenECEcuadorGovernment and Public SectorNot stated
Santa Barbara Endodontics
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The GentlemenUSUnited StatesHealthcareNot stated
Other confirmed victims in the same industry
VictimClaimed byCountryIndustryData claimedPosted
SQA Services Inc
sqaservices.com
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PearUSUnited StatesConsulting544 GB
Globeia Inc.
globeia.com
The-seven-deadly-sinsUSUnited StatesConsultingNot stated
fairfeelegalservices.com
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INC RansomUSUnited StatesConsultingNot stated
grupoabg.com
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LockBit 5.0MXMexicoConsultingNot stated
Hocon Gas
hocongas.com
QilinUSUnited StatesConsultingNot stated

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Figures as of Oct 19, 2026. Confirmed leak-site claims collected by Brandefense technologies and validated by Brandefense analysts.

Listed on a leak site means a ransomware group has claimed the company; it is not a confirmed breach. To request a correction or removal, contact Brandefense.