Year	Employer	Vendor Name	Amount	Source
2017	Il State Toll Highway Auth	Revolving Maint & Operation Ac	$42,651,003.29	Illinois State Checkbook
2019	Transportation	National Railroad Passenger Co	$42,446,320.51	Illinois State Checkbook
2020	State Board Of Education	Harlem Consolidated School	$42,388,423.68	Illinois State Checkbook
2017	Revenue	Winnebago County Treasurer Off	$42,341,092.61	Illinois State Checkbook
2022	State Board Of Education	Comm Cons School District 15	$42,259,398.49	Illinois State Checkbook
2020	Healthcare & Family Services	Dentaquest Group Inc	$42,254,510.65	Illinois State Checkbook
2023	State Board Of Education	Freeport School District 145	$42,224,174.13	Illinois State Checkbook
2022	Revenue	Normal Town Treasurer	$42,175,404.06	Illinois State Checkbook
2021	State Board Of Education	Rock Island School Dstrct #41	$42,099,532.79	Illinois State Checkbook
2018	Revenue	Elgin City Treasurer	$42,092,853.29	Illinois State Checkbook
2017	Aging	Hah Holdings Llc	$42,060,070.24	Illinois State Checkbook
2021	Healthcare & Family Services	Dentaquest Group Inc	$42,030,399.82	Illinois State Checkbook
2018	Revenue	Bolingbrook Village Treasurer	$42,015,237.82	Illinois State Checkbook
2023	Healthcare & Family Services	Northshore University Health	$41,864,768.07	Illinois State Checkbook
2018	State Board Of Education	Belvidere Community Unit	$41,756,043.26	Illinois State Checkbook
2019	Il Student Assistance Comm	Pennsylvania Higher Education	$41,735,969.90	Illinois State Checkbook
2023	Innovation And Technology	Dell Marketing Lp	$41,723,312.55	Illinois State Checkbook
2022	State Board Of Education	Moline-Cole Valley Community	$41,608,270.39	Illinois State Checkbook
2022	Transportation	Meade Inc	$41,601,527.13	Illinois State Checkbook
2021	Healthcare & Family Services	Chicago Board Of Education	$41,547,948.84	Illinois State Checkbook
2019	Healthcare & Family Services	Northwestern Memorial Hospital	$41,544,347.95	Illinois State Checkbook
2022	Revenue	Arlington Heights Treasurer	$41,517,343.56	Illinois State Checkbook
2021	Human Services	The Thresholds	$41,463,318.41	Illinois State Checkbook
2022	Corrections	Reditus Laboratories Llc	$41,377,559.50	Illinois State Checkbook
2021	Innovation And Technology	Ibm Corporation	$41,324,503.64	Illinois State Checkbook
2021	State Board Of Education	Alton Comm Unit School Dist	$41,194,237.01	Illinois State Checkbook
2020	Il State Toll Highway Auth	Plote Construction Inc	$41,192,912.60	Illinois State Checkbook
2020	Healthcare & Family Services	Optum Government Solutions Inc	$40,989,343.66	Illinois State Checkbook
2020	Healthcare & Family Services	St Johns Hospital Sisters Of	$40,973,674.28	Illinois State Checkbook
2022	State Board Of Education	West Chicago School Dist 33	$40,923,054.70	Illinois State Checkbook
2018	University Of Illinois	University Of Illinois	$40,824,735.58	Illinois State Checkbook
2023	Transportation	Samron Midwest Contracting Inc	$40,809,889.52	Illinois State Checkbook
2018	Revenue	Chicago Park District	$40,777,953.62	Illinois State Checkbook
2022	Transportation	The Kilian Corporation	$40,620,576.04	Illinois State Checkbook
2017	Revenue	Elgin City Treasurer	$40,610,207.73	Illinois State Checkbook
2021	Il Criminal Justice Info Auth	Illinois Coalition Against	$40,602,463.73	Illinois State Checkbook
2023	Revenue	Evanston Finance Director	$40,565,802.44	Illinois State Checkbook
2022	State Board Of Education	Joliet Twp Hs Dist 204	$40,560,666.47	Illinois State Checkbook
2022	Healthcare & Family Services	Deloitte Consulting Llp	$40,556,454.71	Illinois State Checkbook
2022	Revenue	Chicago City Comm Coll 508	$40,545,626.19	Illinois State Checkbook
2020	Il Criminal Justice Info Auth	Illinois Coalition Against	$40,493,063.21	Illinois State Checkbook
2023	Innovation And Technology	Carahsoft Technology Corp	$40,476,663.67	Illinois State Checkbook
2022	Transportation	Iroquois Paving Corp	$40,459,150.96	Illinois State Checkbook
2022	State Board Of Education	Schaumburg Comm Consolidated	$40,452,194.82	Illinois State Checkbook
2021	Transportation	Stark Excavating Inc	$40,446,126.03	Illinois State Checkbook
2023	Aging	U & F Sons Inc	$40,415,810.40	Illinois State Checkbook
2017	Central Management	Cigna Health And Life Ins Co	$40,304,177.09	Illinois State Checkbook
2022	Human Services	Illinois Dept Of Human Svcs	$40,242,738.00	Illinois State Checkbook
2019	State Board Of Education	Cahokia Comm School Dist 187	$40,228,196.12	Illinois State Checkbook
2017	Revenue	Bolingbrook Village Treasurer	$40,227,162.18	Illinois State Checkbook
2019	Capital Development Board	River City Construction Llc	$40,222,645.35	Illinois State Checkbook
2023	Revenue	Peoria Unit Sch 150	$40,025,818.57	Illinois State Checkbook
2017	Healthcare & Family Services	Carle Foundation Hospital	$40,021,700.32	Illinois State Checkbook
2020	State Board Of Education	Mclean County Unit Dist No 5	$40,003,330.77	Illinois State Checkbook
2021	State Board Of Education	Niles Twp School Treasurer	$39,892,129.51	Illinois State Checkbook
2021	Revenue	Orland Park Village Treasurer	$39,877,068.71	Illinois State Checkbook
2019	Il Student Assistance Comm	Navient Solutions Inc	$39,826,057.29	Illinois State Checkbook
2023	State Board Of Education	Huntley Community School	$39,804,692.29	Illinois State Checkbook
2022	State Board Of Education	Freeport School District 145	$39,802,930.56	Illinois State Checkbook
2018	Il State Toll Highway Auth	Fh Paschen S N Nielsen &	$39,801,108.34	Illinois State Checkbook
2023	State Board Of Education	West Chicago School Dist 33	$39,779,815.51	Illinois State Checkbook
2018	State Board Of Education	Cahokia Comm School Dist 187	$39,755,277.93	Illinois State Checkbook
2023	Il Criminal Justice Info Auth	Illinois Coalition Against	$39,738,545.49	Illinois State Checkbook
2021	Il State Toll Highway Auth	Wheatland Title Companies Inc	$39,707,642.00	Illinois State Checkbook
2021	Revenue	Mount Prospect Village Treasur	$39,662,126.68	Illinois State Checkbook
2020	Il State Toll Highway Auth	Curran Contracting Company	$39,640,693.59	Illinois State Checkbook
2022	Human Services	University Of Illinois	$39,541,175.70	Illinois State Checkbook
2023	State Board Of Education	Galesburg Community Unit Schoo	$39,528,409.58	Illinois State Checkbook
2020	Environmental Protect Agency	Metropolitan Water Reclamation	$39,483,600.00	Illinois State Checkbook
2023	State Board Of Education	Zion Public School Dist 6	$39,378,931.67	Illinois State Checkbook
2017	State Board Of Education	Kankakee School Dist 111	$39,364,537.50	Illinois State Checkbook
2021	State Board Of Education	Collinsville Community Unit	$39,336,287.66	Illinois State Checkbook
2018	Transportation	St Clair County Transit Dist	$39,335,445.43	Illinois State Checkbook
2020	State Board Of Education	Rock Island School Dstrct #41	$39,331,143.21	Illinois State Checkbook
2023	State Board Of Education	Board Of Education S D 100	$39,313,408.22	Illinois State Checkbook
2022	Healthcare & Family Services	Loyola University Medical Cntr	$39,287,023.43	Illinois State Checkbook
2022	Innovation And Technology	Deloitte Consulting Llp	$39,240,798.82	Illinois State Checkbook
2019	State Board Of Education	Granite City Cusd 9	$39,219,096.06	Illinois State Checkbook
2019	Revenue	Metrpltn Water Rclm Dist Of Ch	$39,206,276.76	Illinois State Checkbook
2021	Innovation And Technology	Carahsoft Technology Corp	$39,188,500.70	Illinois State Checkbook
2020	State Board Of Education	Community Unit School District	$39,172,434.48	Illinois State Checkbook
2020	Transportation	National Railroad Passenger Co	$39,134,959.03	Illinois State Checkbook
2017	State Board Of Education	Wheeling Township Schools	$39,115,618.25	Illinois State Checkbook
2023	State Board Of Education	Belleville School District 118	$39,113,560.96	Illinois State Checkbook
2023	State Board Of Education	Community Unit School	$39,087,846.28	Illinois State Checkbook
2017	Revenue	Skokie Village Treasurer	$39,024,675.44	Illinois State Checkbook
2022	Natural Resources	Natural Resources Dept Of	$39,001,500.00	Illinois State Checkbook
2018	Environmental Protect Agency	Fox Metro Water Rclmtn Dist	$38,987,171.81	Illinois State Checkbook
2023	Revenue	Elk Grove Village Treasurer	$38,985,754.29	Illinois State Checkbook
2022	State Board Of Education	Huntley Community School	$38,674,241.75	Illinois State Checkbook
2018	Revenue	Skokie Village Treasurer	$38,674,160.71	Illinois State Checkbook
2018	Transportation	Judlau Contracting Inc	$38,665,827.84	Illinois State Checkbook
2020	Il State Toll Highway Auth	Wheatland Title Companies Inc	$38,662,800.00	Illinois State Checkbook
2022	State Board Of Education	Community Unit School	$38,653,547.94	Illinois State Checkbook
2018	Il State Toll Highway Auth	Lorig Construction Company	$38,631,328.80	Illinois State Checkbook
2021	Revenue	Waukegan City Treasurer	$38,609,371.74	Illinois State Checkbook
2021	Innovation And Technology	Deloitte Consulting Llp	$38,580,685.90	Illinois State Checkbook
2020	Il Student Assistance Comm	Navient Solutions Inc	$38,544,939.41	Illinois State Checkbook
2019	State Board Of Education	North Chicago School District	$38,531,474.91	Illinois State Checkbook
2021	Il Sports Facilities Auth	Illinois Sports Facilities	$38,500,000.00	Illinois State Checkbook