Martin Viessmann Net Worth

Martin Viessmann has an estimated net worth of $2.8 billion, according to Forbes Real-Time Billionaires, Martin Viessmann profile (figures as of October 20, 2026). That is down from a peak of $4.6 billion.

Martin Viessmann is a German businessman and chairman of the executive board of Viessmann Generations Group, the family-owned company behind the Viessmann heating and cooling business. He is the grandson of Johann Viessmann, who founded the company in 1917, and the son of Hans Viessmann.

He earned a diploma from the University of Erlangen and later received an honorary doctorate from the University of Wisconsin. He and his wife, Annette, live in Allendorf, Germany, where the company is based, and have two children, Katharina and Maximilian.

He is a fitness buff and a keen skier, holds a professional pilot's license, and has made reducing carbon emissions a theme of his leadership. He has said he envisions a world where CO2 emissions fall by 80% and fossil energy use by two-thirds.

Viessmann belongs to the third generation of a family that has run the business for more than a century. He has combined that inheritance with a strong personal focus on energy efficiency and lower emissions, themes that run through the company's awards and its training programs.

How Martin Viessmann made his money

Viessmann's wealth is inherited from the family company, which grew into one of Germany's best-known makers of heating systems. Forbes says the private group has 12,000 employees and 23 production divisions in 12 countries. Today it describes itself as an investment company aiming to create living spaces for future generations.

The family remains in charge. His son Maximilian is co-CEO, and his daughter, Anna Katharina, is a non-executive board member of the family holding company. The group sponsors winter sports and runs the Viessmann Academy, which trains heating engineers.

The company has won recognition for its green push. It received the Energy Globe Award for Sustainability in 2012, and Martin was named Greentech Manager of the Year in 2013. With his wife he also endowed a chair in sustainable technology at the University of Wisconsin Oshkosh.

How Forbes has valued Martin Viessmann

Forbes valued Viessmann at $4.6 billion in 2019, then cut him sharply to $1.1 billion in 2020. His figure recovered to $1.8 billion in 2021, $1.9 billion in 2022 and $1.8 billion in 2023.

It has risen every year since, to $2.5 billion in 2024, $2.7 billion in 2025 and $3 billion on the 2026 World's Billionaires List. As of October 20, 2026, the Forbes real-time billionaires tracker showed $2.8 billion.