The thegentlemen ransomware group listed Henry Frerk Sons on its data leak site on 2026-07-23. Country: US Sector: Manufacturing Domains named: hfsmaterials.com, zoominfo.com Claim as published on the leak site: ***.com zoominfo.com/c/henry-frerk-sons-inc/44255454 Henry Frerk Sons (HFS Materials) is a premier masonry and plaster restoration supplier based in the Chicago region, with over 140 years of history. They specialize in custom matching and blending of historic mortars, concrete, and stone patching materials, alongside offering on-site volumetric ready-mix concrete services. The company provides a comprehensive range of building materials, including natural hydraulic lime, specialized cleaners, sealers, and preblended mortars for both historic preservation and new construction projects