MatTek
About the organisation
***.com zoominfo.com/c/mattek-corp/109184324 MatTek Corporation is a pioneering biotechnology company founded in 1985 and headquartered in Ashland, Massachusetts, specializing in the development of innovative in vitro 3D reconstructed human tissue models. They produce advanced microtissues and cell culture products that are widely used by researchers to accelerate drug development, conduct toxicity testing, and replace traditional animal testing. Originally an independent leader in tissue engineering, the company was recently acquired by the global life science supplier Sartorius and now operates as a key part of their advanced biological models portfolio
What the listing means
MatTek appeared on the thegentlemen leak site on 23 July 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated. This group has published 134 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing MatTek as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on mattek.com, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Manufacturing organisations should review this group's known TTPs and validate detection coverage against them.
- Watch for follow-on extortion: stolen data is often re-leaked or resold after the initial listing.
- A leak-site listing is a claim made by the attacker, not a confirmed breach — check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/TWF0VGVrQHRoZWdlbnRsZW1lbg==