Billionaire Profile
Jack Dorsey
Global Rank
#806

Image: Public domain | via Wikimedia Commons

Jack Dorsey

CEO, Block, Inc.
US
Real-Time Net Worth
$5B
As of December 2025
Age
49
Source
Twitter, Square
Industry
technology
Citizenship
US

Biography

Jack Dorsey is a prominent American entrepreneur and technology executive, best known as the co-founder of Twitter (now X) and the founder of Block, Inc. (formerly Square). Born on November 19, 1976, Dorsey's career has been marked by innovation and a deep understanding of the digital landscape. His primary source of wealth stems from his ventures with Twitter and Block, Inc. He is the largest individual shareholder of Block, Inc.. Dorsey's career has seen him take on multiple CEO roles simultaneously, demonstrating a remarkable ability to manage and lead in the fast-paced tech industry. His estimated net worth is $5.0 billion, with his stake in Block Inc. being a major contributor. Dorsey has also been involved in various philanthropic efforts, channeling significant amounts of money towards different causes.

Wealth Over Time

In-Depth Profile

Early Life and Education

Jack Dorsey was born in St. Louis, Missouri, on November 19, 1976. He developed an early interest in computers and communications, learning to program at a young age while attending Bishop DuBourg High School. He briefly attended the University of Missouri-Rolla before transferring to New York University. However, he dropped out before graduating to pursue his entrepreneurial aspirations.

Rise to Success

Dorsey's career began with dispatch software, a field he explored in his youth. In 2000, he founded a company focused on dispatching couriers, taxis, and emergency services. His breakthrough came with the idea for Twitter, a social media platform that revolutionized communication. Twitter was co-founded in 2006. Dorsey served as CEO of Twitter from 2007 to 2008 and then again from 2015 to 2021. He also co-founded Square (now Block, Inc.) in 2009, a financial services and mobile payments company. He has been the chairman of Block, Inc..

Key Business Strategies

Dorsey's success can be attributed to his vision and ability to identify emerging trends in technology and finance. His leadership style involved focusing on user experience and creating innovative solutions to existing problems. At Twitter, he prioritized real-time communication and simplicity. With Block, his strategy centered on simplifying financial transactions for both consumers and merchants.

Philanthropy

Dorsey has been actively involved in philanthropy through his initiative, #startsmall, which supports various causes, including global crisis relief, girls' health and education, and open internet development. In 2020, he transferred approximately $1 billion of his equity in Square, Inc. to #startsmall. He has donated millions to various organizations, including Water.org, BBC Media Action, and Camp Fire.

Career Milestones

2006

Co-founded Twitter

Co-founded the social media platform that revolutionized real-time communication.

2007-2008

CEO of Twitter

Served as the CEO during the early growth phase of the company.

2009

Co-founded Square (Block, Inc.)

Founded the financial services and mobile payment company.

2015-2021

CEO of Twitter

Returned as CEO to lead the company through further expansion and development.

2021

Stepped Down as Twitter CEO

Dorsey resigned as CEO of Twitter in November 2021, focusing on his role at Block, Inc.

Philanthropy & Social Impact

Global Crisis Relief, Girls' Health & Education, Open Internet Development

#StartSmall

$1B

Dorsey's philanthropic initiative supporting global crisis relief, girls' health and education, and open internet development.

Water and Sanitation

Water.org

$4.7M

Donation to provide access to safe water and sanitation in Africa.

Media Support

BBC Media Action

$0.75M

Donation to support independent media around the world.

Youth Development

Camp Fire

$1M

Funds to support inclusive youth development.

Empowering Women and Girls

KANPE Foundation

$5M

Donation to support women and girls in Haiti's Central Plateau.

Business Philosophy & Leadership

Notable Quotes

""Make every detail perfect and limit the number of details.""

Leadership Principles

Focus on Simplicity

Dorsey emphasizes the importance of simplicity in product design and communication.

Embrace Innovation

Encourages the exploration of new ideas and technologies to drive progress.

Prioritize User Experience

Places a strong emphasis on creating user-friendly products and services.

Controversies & Challenges

2020

Criticism for running both Twitter and Square

Dorsey faced criticism for simultaneously running both Twitter and Square, with some critics suggesting it affected his focus on Twitter's growth.

2016

Ranked as one of the worst CEOs

Fox Business ranked Dorsey as the No. 4 Worst CEO due to slow growth and falling stock prices for Twitter.