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Billionaire Profile
Dennis Washington
Global Rank
#419

Image: FelixRo | CC BY 3.0 | via Wikimedia Commons

Dennis Washington

CEO, Construction
REAL - Missoula, Montana
Real-Time Net Worth
$9.06B
Estimated based on Construction stock value as of September 10, 2026
0% (24h)
Age
91
Source
Construction, mining
Industry
Construction & Engineering
Citizenship
United States

Biography

Dennis Washington (born 1934) is a prominent American billionaire industrialist, celebrated for his achievements in construction, mining, and transportation. His journey began with a modest construction venture, fueled by a $30,000 loan, which rapidly expanded into the Washington Companies, a vast privately held conglomerate. His source of wealth stems from construction and mining. Washington's career showcases an impressive trajectory, marked by strategic acquisitions, including a pivotal move into the mining sector, and expansion into various industries such as railroads and marine services. A dedicated philanthropist, he, along with his wife, established the Dennis & Phyllis Washington Foundation in 1988, which supports education, health, and community service initiatives. As of March 2026, Dennis Washington's net worth is estimated at $7.8 billion, solidifying his position as a leading figure in American business.

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Data Updated
Sep 10, 2026
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Wealth Over Time

Net Worth History

YearNet Worth
2026$9.06B
2025$7.80B
2024$7.80B
2020$6.10B

Portfolio Holdings

Seaspan Corporation

Seaspan Corporation

SSWMarine Transportation
Vancouver, B.C.
Not Available employees

In-Depth Profile

Early Life

Dennis Washington was born in Spokane, Washington, in 1934. He spent his childhood in various locations, including Spokane, Bremerton, and Missoula, Montana. His parents divorced when he was young, and he lived with his mother. Washington's early life included overcoming polio at age eight, which required hospitalization. He became self-sufficient at a young age, working various jobs. He graduated from Missoula High School in 1951.

Rise to Success

After high school, Washington worked in construction in Alaska before returning to Montana and working in his uncle's construction company. At age 30, in 1964, he started his own construction company, Washington Construction, with a $30,000 loan and a single bulldozer. The company grew to be the largest contractor in Montana by 1969. In the 1970s, he expanded into mining and dam construction. A significant achievement was acquiring a copper and molybdenum mine in Butte, Montana, in 1986, which proved highly profitable. Washington further diversified into railroads, marine services, coastal shipping, aviation, and real estate.

Key Business Strategies

Washington's business strategy involved acquiring and revitalizing underperforming assets. He focused on cost-cutting measures, such as hiring non-union workers, and implemented profit-sharing. His approach also included strategic acquisitions. In 1996, Washington Construction acquired Morrison-Knudsen Corporation, forming Washington Group International.

Philanthropy

Dennis and Phyllis Washington established the Dennis & Phyllis Washington Foundation in 1988. The foundation focuses on education, health, human services, community service, and arts and culture. The foundation supports various organizations, providing scholarships and funding programs that enhance the quality of life for individuals and communities.

Career Milestones

1964

Founded Washington Construction

Started the construction business with a loan and a single bulldozer, which grew into the largest construction firm in Montana.

1969

Largest Contractor in Montana

Washington Construction became the largest construction firm in Montana.

1986

Acquired Copper Mine

Acquired a copper and molybdenum mine in Butte, Montana, which later became highly profitable.

1987

Montana Rail Link

Leased Burlington Northern Railroad's southern Montana route, now operating as Montana Rail Link.

1988

Dennis & Phyllis Washington Foundation

Founded the Dennis & Phyllis Washington Foundation to coordinate philanthropic efforts.

1996

Acquired Morrison-Knudsen

Merged Washington Construction Group with Morrison Knudsen Corporation, forming Washington Group International.

Philanthropy & Social Impact

Philanthropy

Dennis & Phyllis Washington Foundation

$XB

Supports organizations in education, health and human services, community service, and arts and culture.

Philanthropy

Young Life

$XB

Ongoing commitment to Young Life, an interdenominational Christian ministry to youth.

Business Philosophy & Leadership

Notable Quotes

"Every person will get a break at some time in their life, but not everyone will recognize it or have ability to use it. The best you can do is be prepared.”"

"It's all possible because of teamwork, and people with a passion for their work."

Leadership Principles

Ethical Leadership

Committed to ethical standards and creating a culture where purpose and profit go hand in hand.

Entrepreneurial Innovation

Fostering entrepreneurial spirit and innovation within the Washington Companies.

Long-Term Vision

Building and maintaining assets and providing services that allow customers to operate more efficiently.

Billionaires Connected to Dennis Washington

Peers in Construction & Engineering

All Construction & Engineering billionaires

Richest in United States

All billionaires from United States

Adjacent Global Ranks

Full global ranking

Frequently Asked Questions

What is Dennis Washington's net worth in 2026?
As of 2026, Dennis Washington's estimated net worth is $9.055 billion, ranking #419 among the world's billionaires. The estimate is based on publicly available shareholding data and market prices, updated daily.
How did Dennis Washington make their money?
Dennis Washington's wealth primarily comes from Construction, mining, most notably through Construction.
Where is Dennis Washington from?
Dennis Washington is from United States.
How old is Dennis Washington?
Dennis Washington is 91 years old.

Sources & References

  1. Dennis Washington — Forbes profile Forbes