Gustav Magnar Witzøe is a Norwegian businessman, a major billionaire shareholder of the salmon fish farming company SalMar ASA (OSE: SALM). Born in 1993 in Frøya Municipality, his fortune is generational, rooted in the immense growth of the Norwegian salmon farming industry, founded by his father, Gustav Witzøe Sr., in 1991.

His career is defined by his unique financial status: his father made him SalMar's main shareholder at age 18, primarily for inheritance tax purposes, making him one of the youngest billionaires in the world. Witzøe is actively involved in the family business, having worked as a milker at SalMar's fish farms in Frøya, gaining hands-on industrial experience.

Gustav Magnar Witzøe's career is characterized by his fiduciary stewardship of his massive SalMar stake. The company is one of the world's largest producers of farmed salmon and holds a significant stake in Scottish Sea Farms (the U.K.'s second largest salmon farmer). His structural role ensures the family's long-term control over the publicly traded, high-growth agri-food company.

Beyond salmon farming, Witzøe has leveraged his liquid capital for technology startup and property investment. He previously worked for MGM Property and has invested in startups like Gopi and Keybutler. His career is marked by early legal issues, serving a two-week prison sentence at age 19 for reckless driving (a controversial incident). His fortune is tied to the massive, stable global demand for high-quality farmed salmon.

Gustav Magnar Witzøe's social impact is structural, stemming from SalMar's role as a massive industrial employer and foundational supplier of farmed salmon to the global food market. The company drives economic activity in Frøya Municipality and the Norwegian aquaculture sector.

His personal philanthropy supports various community and educational initiatives. His career is a testament to the profitability of industrializing aquaculture and the impact of generational tax planning on personal wealth.

Gustav Magnar Witzøe maintains a youthful, high-end style that balances his extreme wealth with his family's industrial background. His attire is often casual and fashionable. His aesthetic is one of confident, established affluence.

Residing in Norway, his luxury is the immense security and autonomy derived from his multi-billion dollar fortune. His life is dedicated to the stewardship of his family's legacy, his interest in technology ventures, and his high-profile social status as a figure in the global salmon industry.