- Herman’s Klussenbedrijf bv
- HFD Facilitaire Diensten bv, hodn De Haan Facilitaire Diensten Groep
- HJ bv
- HK Solutions Group bv, hodn HK Solutions Dredging; HK Solutions Elektro; HK Solutions Engineering; HK Solutions Flex; HK Solutions Group bv; HK Solutions Infra; HK Solutions Milieu; HK Solutions Projects; HK Solutions Safety; HK Solutions Telecom
- HMC bv, hodn HMC Beveiligingen
- Hobur Twente bv
- HSEngineering bv, hodn HSEngineering Aannemingsbedrijf; HSEngineering High Service Engineering; HSEngineering Information and Communication Technology; HSEngineering The Investment Engineering
- HSL Logistik bv
- Ingenieurs Bureau Jac. van der Veen bv, hodn Van der Veen – Event Engineering
- Installatiebedrijf Spiek en De Vries bv