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Listed on a ransomware leak site

Tentac

tentac.co.jp

Tentac was listed on the The Gentlemen leak site on Sep 14, 2026. Information as of Oct 19, 2026.

Country: JapanIndustry: Technology
Updated continuously · figures as of Oct 19, 2026
Claimed by
The Gentlemen
First listed
Sep 14, 2026
Claims recorded
1

Leak-Site Claim.

The GentlemenConfirmed claim
Posted on the leak site
Sep 14, 2026
Collected by Brandefense
Sep 15, 2026
Data claimed
Not stated
Leak-site post text, written by the group
tentac.co.jp zoominfo.com/c/tentac-co-ltd/[removed] TENTAC Co., Ltd world's leading maker of robotic tool changers, automatic docking systems that let industrial robots swap end-of-arm tools (welding torch → gripper → spray gun → grinder) mid-production without stopping the line. Founded 1968 as a Kobe Steel division, spun off independent in 1985; HQ in Kobe, Japan; ~35-40 employees, ~¥1.5-2B revenue, yet claims up to 80% global market share in robot docking systems. Technology: micron-level positioning repeatability, safety locks (tool stays attached even on pressure loss), and media-passing…

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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.