Billionaire Profile
Dennis Washington
Global Rank
#446

Image: Public domain | via Wikimedia Commons

Dennis Washington

CEO, The Washington Companies
US
Real-Time Net Worth
$8B
As of December 2025
Age
91
Source
Construction, mining
Industry
logistics
Citizenship
US

Biography

Dennis Washington, born in 1934, is an American billionaire industrialist renowned for his significant contributions to the construction and mining industries. His journey began with a modest loan, evolving into the Washington Companies, a diverse group of privately held businesses. With an estimated net worth of $8.0 billion, Washington's wealth stems from his strategic investments in construction, mining, and related logistics. His career is marked by entrepreneurial achievements and a commitment to philanthropy, making him a prominent figure in the business world.

Wealth Over Time

In-Depth Profile

Early Life

Dennis Washington was born in Spokane, Washington, in 1934. He spent his formative years in Spokane, Bremerton, and Missoula, Montana. Growing up, he faced challenges, including his parents' separation, which instilled in him a strong work ethic and the desire to build a stable life.

Rise to Success

At the age of 30, Washington started his construction business with a $30,000 loan and a single bulldozer. By 1969, Washington Construction had become the largest contractor in Montana. He expanded into mining and dam construction in the 1970s. A pivotal moment came in 1986 when he acquired a copper and molybdenum mine in Butte, Montana, which proved highly profitable. Washington diversified further into railroads, marine services, coastal shipping, aviation, and real estate. In 1996, he acquired Morrison-Knudsen Corporation, forming Washington Group International.

Key Business Strategies

Washington's business strategy was marked by identifying opportunities and executing projects efficiently. He focused on strategic acquisitions, diversifying his portfolio to include various industries, and adapting to market changes. Key acquisitions include the copper and molybdenum mine in Butte, which helped to fuel further expansion.

Philanthropy

Dennis and his wife, Phyllis, established the Dennis and Phyllis Washington Foundation in 1988. The foundation supports education, arts and culture, health and human services, and community services. The foundation has donated millions of dollars to various causes, reflecting Washington’s commitment to giving back and uplifting individuals.

Career Milestones

1964

Founded Washington Construction

Started his construction business with a $30,000 loan and a bulldozer.

1969

Largest Contractor in Montana

Washington Construction became the largest contractor in Montana.

1986

Acquired Copper Mine in Butte, Montana

Acquired a copper and molybdenum mine, which became profitable.

1996

Acquired Morrison-Knudsen Corporation

Led to the formation of Washington Group International.

Philanthropy & Social Impact

Philanthropy

Dennis and Phyllis Washington Foundation

$960M

Supports education, health, arts, and community services.

Philanthropy

Young Life

$20M

Gifted $20 million to the non-denominational Christian youth organization.

Business Philosophy & Leadership

Notable Quotes

"People always ask me for my secret. There isn't one. You've just got to keep a level head and stay away from greed. I just think in my life I relied on my instincts and had good intuition, and things just kind of fell into place."

Leadership Principles

Intuition and Instincts

Relied on instincts and good intuition in making decisions.

Hard Work and Perseverance

Emphasized the importance of hard work and staying away from greed.