1. Amazon (400,000+ employees)
2. Boeing (145,000+ employees)
3. UnitedHealth Group (70,000+ employees)
4. Providence Health & Services (60,000+ employees)
5. Microsoft (57,000+ employees)
6. Starbucks (45,000+ employees)
7. Costco Wholesale (44,000+ employees)
8. Walmart (40,000+ employees)
9. Safeway (35,000+ employees)
10. The Home Depot (30,000+ employees)
These companies employ a significant portion of the workforce in Washington state and contribute to the state's economy.