Carl Gustav Fredrik Mannerheim

Megacon AB designs, develops, manufactures and markets equipment and systems for managing and monitoring electrical supplies and energy in its many diverse forms. The product segments consist of earth leakage, electrical environment and energy management. The company was founded by Peter Stockhaus in 1984 and is headquartered in Bromma, Sweden.

Enaco AB designs, constructs and maintains secure data centers. The company was founded in 1977 and is located in Solna, Sweden.

Mannerheim Invest AB provides investment activities and services. The firm offers support and contact network within its portfolio companies such as, financial houses, industry, and technological firms. The was founded by Carl Gustav Fredrik Mannerheim in 2007 and is headquartered in Stockholm, Sweden.

VVS-Specialisten I Sodertalje Holding AB provides energy efficient indoor climate solutions. The company is headquartered in Sodertalje, Sweden.

FMT Installation AB provides plumbing and ventilation services. It offers pipes, heating pumps, and ventilation systems installation. The company was founded in 1994 and is headquartered in Solna, Sweden.

Mälarvärme Holding AB provides system solutions and services for optimal balance between indoor climate and low operating costs and environmentally friendly energy supply. The company was founded in 2003 and is headquartered in Bromma, Sweden.

GTM Holding AS provides financial investment services. The company was founded in 2006 and is headquartered in Hønefoss, Norway.