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Listed on a ransomware leak site

MCM Construction

mcmconstructioninc.com

MCM Construction was listed on the BlackLock leak site on May 30, 2025. Information as of Oct 19, 2026.

Updated continuously · figures as of Oct 19, 2026
Claimed by
BlackLock
First listed
May 30, 2025
Claims recorded
1

Leak-Site Claim.

BlackLockConfirmed claim
Posted on the leak site
May 30, 2025
Collected by Brandefense
Jul 11, 2025
Data claimed
Not stated
Leak-site post text, written by the group
Commercial & Residential Construction California, United States <25 Employees MCM Construction is a leading bridge construction company in the USA, known for building over 1000 critical structures across the West. Revenue $26.1 Million

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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.