Billionaire Profile
Robert Duggan
Global Rank
#239

Image: Public domain | via Wikimedia Commons

Robert Duggan

CEO, Summit Therapeutics
US
Real-Time Net Worth
$12.1B
As of December 2025
Age
81
Source
Pharmaceuticals
Industry
healthcare
Citizenship
US

Biography

Robert W. Duggan, born in 1944, is a prominent American entrepreneur in the healthcare industry, with an estimated net worth of $12.1 billion. His wealth primarily stems from his investments and leadership in the pharmaceutical sector. Duggan's career includes founding and leading several successful companies, including Pharmacyclics, where he oversaw the development of the cancer drug Imbruvica. He is currently the CEO of Summit Therapeutics. Duggan's journey began with early ventures and evolved into significant contributions to the biotech world, marked by his strategic investments and philanthropic endeavors.

Wealth Over Time

In-Depth Profile

Early Life

Robert W. Duggan was born in Oakland, California, in 1944. He grew up in a household where his father was an industrial engineer, and his mother was a nurse. Duggan attended St. Francis High School, where he was the quarterback of the football team.

Rise to Success

Duggan's entrepreneurial journey began in the 1970s with ventures like Paradise Bakery & Café. He later transitioned into the tech sector, becoming CEO of Computer Motion, a robotic surgery company. However, his most significant financial achievement came from his involvement with Pharmacyclics. Duggan invested in Pharmacyclics in 2004 and became CEO in 2008. He directed the development of Imbruvica, a breakthrough cancer drug that became a major revenue driver. In 2015, AbbVie Inc. acquired Pharmacyclics for $21 billion, solidifying Duggan's position as one of the wealthiest figures in biotechnology. He is currently the CEO of Summit Therapeutics.

Key Business Strategies

Duggan's success is attributed to his strategic investments and leadership. He has a knack for identifying promising companies, investing, and providing the leadership to turn them into financial successes. Duggan's ability to recognize the potential in innovative treatments and his willingness to invest heavily in them have been pivotal. His approach involves a combination of encouraging innovation while maintaining disciplined oversight.

Philanthropy

Duggan has been involved in several philanthropic endeavors. He and his ex-wife have contributed to educational and cultural initiatives, including the UC Santa Barbara Athletics Program, College of Engineering, and the Religious Studies Department. He has also donated to the Church of Scientology.

Career Milestones

1970s

Founded Paradise Bakery & Café

Founded a bakery chain that expanded to 16 locations.

1990

CEO of Computer Motion

Led the robotic surgery company, which developed the first FDA-approved robotic surgery system.

2008

CEO of Pharmacyclics

Oversaw the development of Imbruvica, a cancer drug that became a major revenue driver.

2015

Pharmacyclics acquired by AbbVie

Pharmacyclics was sold to AbbVie for $21 billion.

2020

Co-CEO of Summit Therapeutics

Invested in Summit Therapeutics and became its CEO.

Philanthropy & Social Impact

Education

UC Santa Barbara Foundation

Undisclosed

Supports the University's athletic department, College of Engineering, and Religious Studies Department.

Religious

Church of Scientology

$360M+

Major donor to the Church of Scientology.

Business Philosophy & Leadership

Notable Quotes

"“Be prepared to adjust and improvise, and to recognize that defeat is a stepping stone.”"

"“We [our family] made about $800 a month… The last couple days of every month we scrambled around the house looking for lost quarters, dimes, and nickels [to pay the bills].”"

Leadership Principles

Encouraging Innovation

Empowers teams to think creatively, particularly in biotech where unconventional ideas often lead to groundbreaking solutions.

Disciplined Risk Management

Maintains a disciplined approach to managing risks and business strategies.