Billionaire Profile
Charles Simonyi
Global Rank
#420

Image: Public domain | via Wikimedia Commons

Charles Simonyi

CEO, Microsoft
US
Real-Time Net Worth
$8.2B
As of December 2025
Age
77
Source
Microsoft
Industry
technology
Citizenship
US

Biography

Charles Simonyi is a Hungarian-American software architect, businessman, and space tourist. His career is marked by pivotal contributions to the tech industry, notably at Microsoft, where he led the development of early versions of Microsoft Office, including Word and Excel. He introduced innovative concepts like object-oriented programming and Hungarian notation, leaving a lasting impact on software development. Simonyi's source of wealth stems from his success at Microsoft and his later ventures. As of 2024, his estimated net worth is $8.2 billion, reflecting his significant achievements in technology and his entrepreneurial spirit. He is known for his adventurous spirit, including two trips to the International Space Station, and his philanthropic endeavors.

Wealth Over Time

In-Depth Profile

Early Life

Charles Simonyi was born in Budapest, Hungary, on September 10, 1948. His father, Károly Simonyi, was a professor of electrical engineering. In his youth, Charles displayed an early interest in computers, learning to program and developing compilers. At the age of 17, he left Hungary.

Rise to Success

Simonyi's career began in Denmark at A/S Regnecentralen, where he worked on the RC 4000 minicomputer. He moved to the United States in 1968 to attend the University of California, Berkeley, earning a B.S. in Engineering Mathematics & Statistics in 1972. He later received a Ph.D. in computer science from Stanford University in 1977. From 1972 to 1981, he worked at Xerox PARC, where he co-developed Bravo, the first WYSIWYG text editor.

Key Business Strategies

Simonyi joined Microsoft in 1981, at the suggestion of Robert Metcalfe. He spearheaded the development of Microsoft's applications group. At Microsoft, he built the organization and applications of what became its most profitable products, Word and Excel, as well as Excel's predecessor Multiplan. He also introduced object-oriented programming and Hungarian notation to Microsoft, standardizing variable naming conventions. In 2002, he left Microsoft to co-found Intentional Software. Microsoft acquired Intentional Software in 2017.

Philanthropy

Simonyi is a noted philanthropist. He established the Charles and Lisa Simonyi Fund for Arts and Sciences in 2003. The foundation has provided grants to various organizations, including the Seattle Symphony, Seattle Public Library, the Metropolitan Opera, and the Vera C. Rubin Observatory.

Career Milestones

1966

Joined A/S Regnecentralen

Began his career in Denmark working with Per Brinch Hansen and Peter Kraft on the RC 4000 minicomputer's Real-time Control System, and with Peter Naur on the GIER ALGOL compiler.

1972

Joined Xerox PARC

Began working at Xerox PARC, contributing to the development of the Xerox Alto and co-developing Bravo, the first WYSIWYG document preparation program.

1977

Ph.D. from Stanford

Earned a Ph.D. in computer science from Stanford University.

1981

Joined Microsoft

Joined Microsoft and led the development of Microsoft's application software, including Word and Excel.

2002

Founded Intentional Software

Left Microsoft to co-found Intentional Software, focusing on intentional programming concepts.

2007

First Spaceflight

Became the fifth space tourist, flying to the International Space Station aboard Soyuz TMA-10.

2009

Second Spaceflight

Made a second trip to the International Space Station aboard Soyuz TMA-14, becoming the first repeat space tourist.

2017

Intentional Software Acquired

Microsoft acquired Intentional Software.

Philanthropy & Social Impact

Education

Simonyi Professorship of the Public Understanding of Science

Undisclosed

Endowed a professorship at Oxford University

Education

Simonyi Professorship for Innovation in Teaching

Undisclosed

Endowed a professorship at Stanford University

Education

Simonyi Professorship of Mathematical Physics

Undisclosed

Endowed a professorship at the Institute for Advanced Study in Princeton, New Jersey

Science

Vera C. Rubin Observatory

$20M

Provided financial support for the construction of the Simonyi Survey Telescope's mirrors and research

Education

AI@UW Initiative

$10M

Established a new initiative at the University of Washington to support advancements in AI, machine learning, and related computing areas.

Business Philosophy & Leadership

Notable Quotes

"“I thought that was the most horrible thing a person could do. How can a man who spent 15 years with me do that? What a stupid thing to do to someone that you actually care about.”"

Leadership Principles

Innovation

Driving innovation by integrating domain experts into the software production process.

Focus on the Future

Understanding and anticipating future technological advancements.

Support for Education

Investing in education and research to advance knowledge and understanding.

Controversies & Challenges

2008

Relationship with Martha Stewart

Ended a 15-year relationship with Martha Stewart.