Dennis Washington

Dennis Washington (#486)

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.

$ 8 B
Construction, mining
United States
M
91 Years

About Me

Dennis Washington parlayed an early love of machinery into a diversified business group called Washington Companies. Washington owns copper mining, marine transportation and heavy equipment businesses. After working for his uncle's construction business, he struck out on his own with a $30,000 loan to start Washington Construction. Montana's richest person, Washington also has an investment in Seaspan Corp., cofounded by son Kyle, which now operates more than 220 container ships.

Achievements

Career Highlights

A snapshot of the defining milestones, leadership decisions, and breakthroughs that shaped Dennis Washington’s rise and global influence.

#477 Billionaires (2026)
#181 Forbes 400 (2025)
The Richest Person In Every State (2025)

Wealth Growth

Net Worth Growth Over Time

Tracking Dennis Washington’s net worth journey over the years, highlighting key growth phases and financial milestones.

Current Net Worth: $7.7B (May 4, 2026)