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Holta Invest AS (Private Equity) is an independent private equity firm headquartered in Norway. The firm was founded in 1983.

Holta Invest AS operates as a alternative investment manager. Its business areas include industrial and financial investments. The company was founded by Ole Halvorsen Holta in 1983 and is headquartered in Oslo, Norway.

Optime Subsea AS engaged in technical services and consultancy in connection with the extraction of crude oil and natural gas services. It specializes in oil and gas, subsea, installation, intervention, work over, engineering, hyperbaric pressure vessel, maintenance, project management, test and assembly, controls, software, control module, and subsea pump. The company was founded on September 15, 2005 and is headquartered in Notodden, Norway.

Holta Invest Sverige AB is a holding company that offers modern Korean furniture design, do-it-yourself wall shelving ideas for living room décor, modern ceramic floor tile designs ideas, and modern furniture. The firm engages in sales, marketing, licensing, consulting, and management regarding products of wood and wood products. It manufactures assembled parquet floors. The company was founded by Kristian Lough-Grimsgaard in 2003 and is headquartered in Grebbestad, Sweden.