BillionaireNet
Leonsis
Theodore Leonsis
Rank #1027
UNITED STATESAutomotiveSports teams

Theodore Leonsis

Net Worth
$3.877B
0% (24h)
Theodore John Leonsis (born January 8, 1957) is a prominent American businessman, investor, and philanthropist, widely recognized for his significant contributions to the sports and technology industries. As the founder, chairman, and CEO of Monumental Sports & Entertainment (MSE), Leonsis oversees a diverse portfolio of sports teams, including the Washington Capitals (NHL), Washington Wizards (NBA), and Washington Mystics (WNBA). His estimated net worth is 3.9 Billion USD. Leonsis's wealth is primarily derived from his sports team ownership and his ventures in the media and entertainment sectors. His career includes a pivotal role as a senior executive at America Online (AOL) during its rapid expansion in the 1990s and early 2000s. Beyond his business achievements, Leonsis is known for his philanthropic efforts, supporting various charitable causes through the Leonsis Foundation and MSE.

The Full Dossier

Early Life

Theodore John Leonsis was born in Brooklyn, New York, on January 8, 1957. He is the son of working-class Greek immigrants. Growing up, Leonsis was the first in his family to attend college. He attended Georgetown University, where he studied American Studies and graduated at the top of his class in 1977.

Rise to Success

After graduating from Georgetown, Leonsis began his career, initially working in corporate communications and marketing. He then founded LIST, a magazine focused on personal computing, which he later sold for a profit. Leonsis's career then took a significant turn when he became a senior executive at America Online (AOL). During his 13-year tenure, he held various leadership positions, playing a crucial role in the company's growth and innovation.

Key Business Strategies

A pivotal moment in Leonsis's career was the founding of Monumental Sports & Entertainment (MSE) in June 2010. Through MSE, he owns and operates a wide array of sports franchises, including the Washington Capitals, Washington Wizards, and Washington Mystics, as well as the Capital One Arena. Leonsis expanded MSE through strategic acquisitions and media partnerships, including the acquisition of the regional sports network, NBC Sports Washington. Another key strategy is the creation and support of esports teams.

Philanthropy

Ted Leonsis is actively involved in various philanthropic endeavors through the Leonsis Foundation and MSE. He is the chairman of the District of Columbia College Access Program (DC-CAP). Leonsis and his family have also supported other causes, including education and scholarship programs. His commitment to giving back reflects his belief in the importance of community involvement.

Career Timeline

2023

Announced Stadium Partnership with Virginia

Announced a $1.35 billion agreement with Virginia Governor Glenn Youngkin for new stadiums in Alexandria, Virginia.

2018

Washington Capitals win Stanley Cup

The Washington Capitals won the Stanley Cup Championship.

2010

Founded Monumental Sports & Entertainment

Founded Monumental Sports & Entertainment (MSE).

2006

Retired from AOL

Retired from active management at AOL.

1994

Joined America Online (AOL)

Joined AOL as a senior executive.

1984

Sold LIST Magazine

Sold LIST magazine to Thomson Reuters.

1981

Founded LIST Magazine

Founded LIST, a magazine focused on personal computing.

Philanthropic Impact

EducationUndisclosed

DC-CAP

Chairman of the District of Columbia College Access Program (DC-CAP), a nonprofit scholarship provider for D.C. students.

Community$4.5M

Monumental Sports & Entertainment Foundation

Donated to local nonprofits in 2025

Education$5M

Georgetown University

Funded a program of student mentoring by alumni who are entrepreneurs in Washington.

Wealth Trajectory