Franz Rudolf Stallmann

Friedrich Services GmbH manufactures and markets road and civil engineering materials. The private company is based in Salzgitter, Germany. The German company was founded in 1994. Jörgen Johannes Sassen has been the CEO of the company since 2018.

Wasteland Investments BV is a privately owned investment company based in Amsterdam, Netherlands. The Dutch company focuses on investing in industrial SMEs, commercial real estate, and start-ups in the area of sustainability and healthcare. The company makes investments in the form of equity or senior debt in companies/projects with an enterprise value up to 30 million euros, facilitating buyouts or providing growth capital. Wasteland Investments is an active investor that supports its portfolio companies through its extensive business network, providing human resources and offering financial expertise. The company was founded by Jörgen Johannes Sassen, a Dutch national with a master's degree in corporate and commercial law from Leiden University and a master's degree in general management from Nijenrode University. Mr. Sassen has successfully founded and acquired several companies that provide services to the European steel industry, and in recent years, the scope of activities has been extended to include commercial real estate and start-ups with a sustainable and/or health focus.

Part of Quarzwerke GmbH, Caminauer Kaolinwerk GmbH provides gravel plant services. The company is based in Königswartha, Germany. The CEOs of the German company are Otto Hieber, Ralf Jeffraim.

Noris Entsorgung GmbH is a subsidiary of the GP Group, which is a network of 61 companies and operating units of GP Günter Papenburg AG. The private company is based in Hannover, Germany. The group employs around 4,000 people nationwide and operates in various sectors such as raw material extraction, construction material production, construction, logistics, recycling, and waste management. The CEO of the German company is Matthias Redeker.