| Year |
Employer |
Vendor Name |
Amount |
Source |
| 2022 |
Washington State Checkbook |
Thurston County |
$42,143,356.93 |
Washington State Checkbook |
| 2017 |
Wash State Health Care Authority |
Sea Mar Community Health Centers |
$42,020,329.95 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Ab Staffing Solutions Llc |
$41,987,774.75 |
Washington State Checkbook |
| 2024 |
Washington Technology Solutions |
Insight Public Sector Inc |
$41,987,698.68 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Hntb Corp |
$41,962,703.73 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Multicare Health System |
$41,956,030.89 |
Washington State Checkbook |
| 2023 |
Social And Health Services |
Us Bank Purchasing Card Program |
$41,942,445.80 |
Washington State Checkbook |
| 2025 |
Social And Health Services |
Chesterfield Services Inc |
$41,924,136.24 |
Washington State Checkbook |
| 2025 |
Transportation |
King County |
$41,885,061.39 |
Washington State Checkbook |
| 2018 |
Social And Health Services |
Us District Court Clerk |
$41,879,250.00 |
Washington State Checkbook |
| 2025 |
Transportation |
Jacobs Engineering Group Inc |
$41,865,393.95 |
Washington State Checkbook |
| 2021 |
Washington State Checkbook |
King Co Natural Resources |
$41,812,807.62 |
Washington State Checkbook |
| 2025 |
Health Care Authority |
Wa State Dshs |
$41,802,523.09 |
Washington State Checkbook |
| 2023 |
Consolidated Technology Services |
Insight Public Sector Inc |
$41,791,713.39 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Rainier Inc |
$41,698,141.05 |
Washington State Checkbook |
| 2018 |
Health Care Authority |
Regence Blueshield |
$41,664,892.99 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Multicare Adult Day Health |
$41,560,045.84 |
Washington State Checkbook |
| 2017 |
Supt Of Public Instruction |
Kennewick School District 17 |
$41,511,017.15 |
Washington State Checkbook |
| 2025 |
Ecology |
Rcfb Capital Projects |
$41,499,211.47 |
Washington State Checkbook |
| 2025 |
Ecology |
Pasco City Of |
$41,366,189.60 |
Washington State Checkbook |
| 2020 |
Washington State Checkbook |
First Choice In-Home Care Inc |
$41,288,082.33 |
Washington State Checkbook |
| 2020 |
Washington State Checkbook |
Client Network Services Llc |
$41,278,415.28 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Hopelink |
$41,263,619.07 |
Washington State Checkbook |
| 2017 |
Dept Of Social And Health Services |
Atg Legal Svcs |
$41,235,805.49 |
Washington State Checkbook |
| 2025 |
Health Care Authority |
Washington Institute For Coagula |
$41,211,114.91 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Puget Sound Educ Svc Dist 121 |
$41,129,744.97 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Spokane Co Community Svc |
$41,120,442.34 |
Washington State Checkbook |
| 2018 |
Social And Health Services |
Atg Legal Svcs |
$41,024,485.32 |
Washington State Checkbook |
| 2018 |
Social And Health Services |
Us Bank Purchasing Card Program |
$40,986,229.07 |
Washington State Checkbook |
| 2023 |
Social And Health Services |
Aacres Wa Llc |
$40,958,037.46 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
Washington Institute For Coagula |
$40,918,449.12 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Ambitions Of Washington |
$40,885,264.25 |
Washington State Checkbook |
| 2017 |
Department Of Transportation |
National Railroad Passenger Corp |
$40,753,359.91 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Kuehg Corp |
$40,595,884.36 |
Washington State Checkbook |
| 2025 |
Social And Health Services |
Hope Human Services Llc |
$40,582,819.87 |
Washington State Checkbook |
| 2024 |
Social And Health Services |
Chesterfield Services Inc |
$40,406,998.91 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Unitedhealthcare Of Washington |
$40,295,159.60 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
Unitedhealthcare Of Washington |
$40,219,373.11 |
Washington State Checkbook |
| 2023 |
Children, Youth, And Families |
Puget Sound Educ Svc Dist 121 |
$40,184,767.33 |
Washington State Checkbook |
| 2023 |
Transportation |
Walsh Construction Ii |
$40,068,575.50 |
Washington State Checkbook |
| 2025 |
Health Care Authority |
Accredo Health Group Inc |
$40,025,370.92 |
Washington State Checkbook |
| 2018 |
Health Care Authority |
Thurston County |
$39,932,272.50 |
Washington State Checkbook |
| 2021 |
Washington State Checkbook |
Uw-Grant & Contract Accounting |
$39,816,970.72 |
Washington State Checkbook |
| 2021 |
Washington State Checkbook |
International Business Machines |
$39,797,754.88 |
Washington State Checkbook |
| 2020 |
Washington State Checkbook |
King Co Public Health |
$39,784,348.63 |
Washington State Checkbook |
| 2023 |
Commerce |
Pierce County Housing Programs |
$39,762,947.14 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Des Office Facilities |
$39,716,627.15 |
Washington State Checkbook |
| 2017 |
Dept Of Social And Health Services |
Res-Care Of Washington Inc |
$39,682,001.27 |
Washington State Checkbook |
| 2024 |
Transportation |
Jacobs Engineering Group Inc |
$39,585,613.95 |
Washington State Checkbook |
| 2018 |
Social And Health Services |
Seattle City Of Human Services |
$39,578,526.61 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Public Hospital District 1 Of Ki |
$39,563,223.37 |
Washington State Checkbook |
| 2025 |
Social And Health Services |
Amicable Health Care |
$39,490,641.69 |
Washington State Checkbook |
| 2025 |
Social And Health Services |
Sails Washington Inc |
$39,481,399.64 |
Washington State Checkbook |
| 2017 |
Wash State Health Care Authority |
Client Network Services Inc |
$39,399,484.76 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Ospi General Fund 001 |
$39,263,162.08 |
Washington State Checkbook |
| 2025 |
Transportation |
Northup Constructors |
$39,198,252.57 |
Washington State Checkbook |
| 2025 |
Civil Legal Aid |
Northwest Justice Project |
$39,196,512.31 |
Washington State Checkbook |
| 2017 |
Dept Of Social And Health Services |
Us Bank Purchasing Card Program |
$39,175,604.18 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
Public Hospital District 1 Of Ki |
$39,166,741.43 |
Washington State Checkbook |
| 2023 |
Transportation |
Kiewit Infrastructure West Co |
$39,049,158.74 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Medefis Inc |
$39,031,463.73 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
North Sound Behavioral Hlth Org |
$38,896,602.65 |
Washington State Checkbook |
| 2025 |
Health Care Authority |
King Co Finance |
$38,890,465.51 |
Washington State Checkbook |
| 2025 |
Transportation |
Central Washington Asphalt Inc |
$38,724,762.17 |
Washington State Checkbook |
| 2017 |
Dept Of Social And Health Services |
Rescare Of Washington Inc. |
$38,703,703.60 |
Washington State Checkbook |
| 2018 |
Health Care Authority |
Client Network Services Inc |
$38,701,704.50 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
Client Network Services Llc |
$38,685,903.85 |
Washington State Checkbook |
| 2023 |
Health Care Authority |
Yakima Valley Farm Workers Clini |
$38,644,409.08 |
Washington State Checkbook |
| 2023 |
Children, Youth, And Families |
Kuehg Corp |
$38,598,895.25 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Skanska Usa Civil West Ca Dist |
$38,556,515.25 |
Washington State Checkbook |
| 2024 |
Civil Legal Aid |
Northwest Justice Project |
$38,541,372.90 |
Washington State Checkbook |
| 2024 |
Enterprise Services |
Hoffman Construction Company Of |
$38,450,921.28 |
Washington State Checkbook |
| 2017 |
Dept Of Social And Health Services |
Seattle City Of Human Services |
$38,417,168.52 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Yakima Valley Farm Workers Clini |
$38,388,175.30 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
Swedish Health Services |
$38,356,182.54 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Clark County Community Services |
$38,228,409.74 |
Washington State Checkbook |
| 2024 |
Social And Health Services |
King County |
$38,187,114.81 |
Washington State Checkbook |
| 2021 |
Washington State Checkbook |
Clark County Auditor |
$38,180,260.64 |
Washington State Checkbook |
| 2023 |
Commerce |
Opportunity Council |
$38,129,158.38 |
Washington State Checkbook |
| 2023 |
Commerce |
Clark County Community Services |
$38,089,756.49 |
Washington State Checkbook |
| 2018 |
Health Care Authority |
Yakima Valley Farm Workers Clini |
$38,066,334.19 |
Washington State Checkbook |
| 2017 |
Dept Of Social And Health Services |
Stillaguamish Tribe Of Indians |
$37,844,771.21 |
Washington State Checkbook |
| 2023 |
Commerce |
Andy Hill Cancer Research Endowm |
$37,829,036.15 |
Washington State Checkbook |
| 2023 |
Social And Health Services |
Chesterfield Services Inc |
$37,795,176.48 |
Washington State Checkbook |
| 2024 |
Social And Health Services |
Hope Human Services Llc |
$37,775,998.33 |
Washington State Checkbook |
| 2023 |
Transportation |
Seattle City Of Dept Of Transp |
$37,721,530.79 |
Washington State Checkbook |
| 2025 |
Transportation |
Max J Kuney Company |
$37,663,057.51 |
Washington State Checkbook |
| 2017 |
Wash State Health Care Authority |
Unitedhealthcare Of Washington |
$37,655,743.82 |
Washington State Checkbook |
| 2022 |
Washington State Checkbook |
Ofm Enterprise Systems Fee |
$37,649,519.24 |
Washington State Checkbook |
| 2025 |
Transportation |
Hamilton-Scarsella A Joint Ventu |
$37,576,168.01 |
Washington State Checkbook |
| 2018 |
Health Care Authority |
Hopelink |
$37,513,751.97 |
Washington State Checkbook |
| 2021 |
Washington State Checkbook |
Chesterfield Services Inc |
$37,426,449.18 |
Washington State Checkbook |
| 2023 |
Military Department |
Providence Health & Services Wa |
$37,361,916.51 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
Spokane City Of |
$37,354,204.14 |
Washington State Checkbook |
| 2018 |
Social And Health Services |
Ambitions Of Washington |
$37,328,589.14 |
Washington State Checkbook |
| 2019 |
Washington State Checkbook |
King Co Public Health |
$37,288,385.78 |
Washington State Checkbook |
| 2021 |
Washington State Checkbook |
Dshs Economic Svs Hq |
$37,196,881.33 |
Washington State Checkbook |
| 2024 |
Commerce |
Snohomish County Human Services |
$37,154,204.04 |
Washington State Checkbook |
| 2020 |
Washington State Checkbook |
Vancouver School District 37 |
$37,151,891.94 |
Washington State Checkbook |
| 2024 |
Health Care Authority |
Yakima Valley Farm Workers Clini |
$37,080,119.40 |
Washington State Checkbook |