Company with Headquarters in WA by rank, source at bottom.

1Amazon.com

2Starbucks

3Costco Wholesale

4Providence Health Services

5Barrett Business Services

6Nordstrom

7Microsoft

8T-Mobile US

9The Hotel Group

10Avanade

11Fortive

12Paccar

13Expedia Group

14Alaska Airlines

15University of Washington

16Savers

17The Firs Camps Retreats

18Expeditors

19PeaceHealth

20Banfield Pet Hospital

21Teck American

22Esterline Technologies

23Recreational Equipment

24Carrix

25Washington State University

26Nash Holdings

27Swedish

28Fairfax Behavioral Health

29Weyerhaeuser

30Group Health Cooperative

31Trident Seafoods

32Eddie Bauer

33Chief Seattle Council

34Washington School for the Deaf

35Laird Norton Co

36Employment Standards Act

37Safeco

38SMG

39Itron

40TrueBlue

41Windermere Real Estate

42Nintendo

43Schweitzer Engineering Laboratories

44Gist

45Virginia Mason Hospital and Seattle Medical Center

46Key Tronic

47Saltchuk

48EmpRes Healthcare Management

49EvergreenHealth Hospice Care

50F5 Networks

51Tableau Software

52Restaurants Unlimited

53ATS Automation Tooling Systems

54Vancouver Public Schools

55SanMar

56Clearwater Paper

57URM Stores

58Jamco America

59Moss Adams

60Zillow

61Quincy Valley Medical Center

62Dow Hotel Co

63John L. Scott

64Edmonds Community College

65Snokist Growers

66JACK FROST FRUIT

67Milliman

68Yakima Regional Cancer Center

69Zulily

70MSN

71Prestige Care

72Simpson Investment Company

73Furuno

74Decatur High School

75Fred Hutchinson Cancer Research Center

76Kadlec Regional Medical Center

77Coinstar Asset Holdings

78Northwest Hospital Medical Center

79Fluke

80Security Industry Specialists

81North Puget Sound Center for Sleep Disorders

82Valley Roz Orchards

83Ocean Beauty Seafoods

84Ram Restaurant Brewery

85Bellevue School District

86HomeStreet Bank

87Pyrotek

88Perkins Coie

89Kloeckner Metals

90Overlake Medical Center

91North Central High School

92Washington River Protection Solutions

93NAES

94Redfin

95Rosauers Supermarkets

96Broetje Orchards

97Milgard Manufacturing

98Papa Murphy’s

99AmericanWest Bancorporation

100Razorfish

Sausalito: https://www.zippia.com/advice/largest-companies-in-washington/