Year	Employer	Vendor Name	Amount	Source
2022	Revenue	Park Ridge City Treasurer	$15,638,341.49	Illinois State Checkbook
2023	Il Community College Board	College Of Lake County	$15,636,325.73	Illinois State Checkbook
2021	State Board Of Education	Ncs Pearson Inc	$15,633,463.00	Illinois State Checkbook
2021	Il State Toll Highway Auth	Omega & Associates Inc	$15,630,912.80	Illinois State Checkbook
2024	Transportation	Keeley & Sons Inc	$15,626,646.76	Illinois State Checkbook
2023	Transportation	Mchenry County	$15,624,475.15	Illinois State Checkbook
2020	Revenue	Westmont Village Treasurer	$15,623,469.48	Illinois State Checkbook
2016	Healthcare & Family Services	Advocate Sherman Hospital	$15,623,086.41	Illinois State Checkbook
2025	State Board Of Education	Monmouth-Roseville Cusd 238	$15,618,742.27	Illinois State Checkbook
2023	Revenue	Niles Twp Hs 219	$15,614,722.35	Illinois State Checkbook
2021	Il State Toll Highway Auth	Martam Const Inc	$15,604,855.72	Illinois State Checkbook
2023	Healthcare & Family Services	Southern Illinois Hospital	$15,603,409.62	Illinois State Checkbook
2025	Capital Development Board	Venice Community Unit School	$15,596,000.00	Illinois State Checkbook
2025	State Board Of Education	County Of Christian	$15,586,406.26	Illinois State Checkbook
2023	Healthcare & Family Services	Misericordia Home	$15,585,781.75	Illinois State Checkbook
2018	Corrections	Cdw Llc	$15,583,904.68	Illinois State Checkbook
2018	Healthcare & Family Services	Good Samaritan Regional Hlth	$15,583,149.51	Illinois State Checkbook
2019	Aging	Medical Gear Llc	$15,580,596.61	Illinois State Checkbook
2021	Innovation And Technology	Presidio Holdings Inc	$15,580,195.75	Illinois State Checkbook
2022	State Police	Dupage County	$15,578,552.42	Illinois State Checkbook
2023	Transportation	State Police Dept Of	$15,576,031.75	Illinois State Checkbook
2025	Revenue	Woodstock City Treasurer	$15,573,753.99	Illinois State Checkbook
2017	Transportation	Martam Const Inc	$15,571,209.58	Illinois State Checkbook
2020	Healthcare & Family Services	Misericordia Home	$15,556,400.87	Illinois State Checkbook
2018	Transportation	Reyhan Bros Inc	$15,554,608.76	Illinois State Checkbook
2025	Il Community College Board	Lake Land College	$15,551,182.78	Illinois State Checkbook
2024	Innovation And Technology	Mckinsey & Company Inc	$15,550,000.00	Illinois State Checkbook
2021	Revenue	Mchenry City Treasurer	$15,549,434.58	Illinois State Checkbook
2019	Human Services	Beverly Farm Foundation	$15,549,405.61	Illinois State Checkbook
2025	Healthcare & Family Services	City Of Rockford	$15,535,359.79	Illinois State Checkbook
2016	State Board Of Education	Stickney Township School Treas	$15,530,359.73	Illinois State Checkbook
2018	Revenue	Romeoville Village Treasurer	$15,525,920.12	Illinois State Checkbook
2022	Commerce And Economic Opportun	Tri-County Opportunities Cncl	$15,515,306.02	Illinois State Checkbook
2020	Human Services	Milestone Inc	$15,512,817.00	Illinois State Checkbook
2025	Revenue	Sycamore City Treasurer	$15,510,860.58	Illinois State Checkbook
2025	Healthcare & Family Services	Saint Anthony Hospital	$15,510,587.99	Illinois State Checkbook
2017	State Board Of Education	Belleville Township High	$15,508,457.93	Illinois State Checkbook
2022	Healthcare & Family Services	Alden Village Health Facility	$15,508,041.80	Illinois State Checkbook
2018	State Board Of Education	Day Care Resources	$15,504,563.04	Illinois State Checkbook
2019	State Board Of Education	Herrin Community Unit School	$15,497,532.44	Illinois State Checkbook
2017	Revenue	Bloomingdale Village Treasurer	$15,495,807.96	Illinois State Checkbook
2021	Revenue	Mundelein Village Treasurer	$15,493,003.98	Illinois State Checkbook
2018	Illinois Gaming Board	Joliet City Treasurer	$15,492,409.96	Illinois State Checkbook
2021	State Board Of Education	Frankfort Community Unit	$15,489,855.50	Illinois State Checkbook
2021	Healthcare & Family Services	Holy Cross Hospital	$15,489,169.02	Illinois State Checkbook
2021	Environmental Protect Agency	Village Of Algonquin	$15,486,420.01	Illinois State Checkbook
2024	Healthcare & Family Services	Misericordia Home	$15,480,191.37	Illinois State Checkbook
2024	Revenue	Frankfort Village Treasurer	$15,477,486.35	Illinois State Checkbook
2018	Healthcare & Family Services	Carle Health Care Inc	$15,476,927.90	Illinois State Checkbook
2023	Healthcare & Family Services	St Alexius Medical Center	$15,473,772.11	Illinois State Checkbook
2023	Human Services	The Hope School	$15,471,813.20	Illinois State Checkbook
2022	State Board Of Education	Centralia Cusd 135	$15,471,331.05	Illinois State Checkbook
2020	Revenue	Wheeling Village Treasurer	$15,461,346.38	Illinois State Checkbook
2024	Revenue	Woodstock City Treasurer	$15,460,991.21	Illinois State Checkbook
2025	Revenue	Mattoon City Treasurer	$15,454,469.78	Illinois State Checkbook
2025	Human Services	Marklund Childrens Home Inc	$15,453,950.30	Illinois State Checkbook
2024	Revenue	Glen Ellyn Village Treasurer	$15,447,234.65	Illinois State Checkbook
2021	Employment Security	Deloitte Consulting Llp	$15,445,899.19	Illinois State Checkbook
2020	Public Health	Pfizer Inc	$15,444,767.60	Illinois State Checkbook
2017	Il State Toll Highway Auth	William Charles Constrctn Llc	$15,440,116.85	Illinois State Checkbook
2024	State Board Of Education	Lake Villa Comm Consolidated	$15,438,270.43	Illinois State Checkbook
2018	State Board Of Education	County Of Dupage School Dist 4	$15,430,562.54	Illinois State Checkbook
2024	State Board Of Education	Woodland Comm Consolidated	$15,430,165.46	Illinois State Checkbook
2020	Revenue	Fairview Heights City Treasure	$15,423,738.57	Illinois State Checkbook
2018	Revenue	Pekin City Treasurer	$15,422,225.41	Illinois State Checkbook
2025	Environmental Protect Agency	Village Of Rantoul	$15,420,089.04	Illinois State Checkbook
2024	Aging	The Catholic Charities Of The	$15,419,807.30	Illinois State Checkbook
2019	Transportation	Dupage County Of	$15,419,074.76	Illinois State Checkbook
2025	Healthcare & Family Services	Center For Comprehensive Svcs	$15,416,700.00	Illinois State Checkbook
2024	Revenue	Rock Island County Regional	$15,415,936.84	Illinois State Checkbook
2019	Healthcare & Family Services	Southern Illinois Hospital	$15,413,378.40	Illinois State Checkbook
2022	Transportation	Judlau Contracting Inc	$15,409,710.66	Illinois State Checkbook
2019	Transportation	Mbk Enterprises Inc	$15,403,095.01	Illinois State Checkbook
2025	Healthcare & Family Services	Highland Park Cvs Llc	$15,401,732.22	Illinois State Checkbook
2023	State Board Of Education	Bond County Community Unit	$15,396,264.28	Illinois State Checkbook
2019	Il Community College Board	Moraine Valley Comm College	$15,387,517.16	Illinois State Checkbook
2017	Healthcare & Family Services	Waukegan Illinois Hosp Co Llc	$15,386,591.41	Illinois State Checkbook
2022	Revenue	Monee Village Treasurer	$15,380,854.23	Illinois State Checkbook
2025	Healthcare & Family Services	St Bernard Hospital	$15,379,363.73	Illinois State Checkbook
2022	Revenue	Deerfield Village Treasurer	$15,376,170.23	Illinois State Checkbook
2020	Healthcare & Family Services	Norwegian American Hosp Inc	$15,373,749.16	Illinois State Checkbook
2019	Revenue	Wheeling Village Treasurer	$15,372,964.52	Illinois State Checkbook
2019	Revenue	Romeoville Village Treasurer	$15,372,727.86	Illinois State Checkbook
2019	Transportation	Stark Excavating Inc	$15,364,370.96	Illinois State Checkbook
2023	State Board Of Education	Troy Community Consolidated	$15,361,528.87	Illinois State Checkbook
2022	Human Services	Trinity Services Inc	$15,347,878.93	Illinois State Checkbook
2025	Revenue	Macon-Piatt County Regional	$15,347,708.28	Illinois State Checkbook
2020	State Board Of Education	Elmwood Park Cusd 401	$15,345,233.36	Illinois State Checkbook
2017	Transportation	Bnsf Railway Company	$15,343,692.93	Illinois State Checkbook
2022	Natural Resources	University Of Illinois	$15,334,902.90	Illinois State Checkbook
2023	Revenue	Comm Cons Elem S D 59	$15,330,958.37	Illinois State Checkbook
2025	State Board Of Education	Warren Township High School	$15,329,127.65	Illinois State Checkbook
2016	State Board Of Education	Marquardt School District 15	$15,322,935.58	Illinois State Checkbook
2023	Environmental Protect Agency	Village Of Oak Lawn	$15,322,111.24	Illinois State Checkbook
2019	State Board Of Education	Wauconda C U Schl	$15,320,680.98	Illinois State Checkbook
2017	Revenue	Oswego Village Treasurer	$15,320,309.28	Illinois State Checkbook
2023	State Board Of Education	Bradley Bourbonnais Community	$15,319,027.71	Illinois State Checkbook
2016	Revenue	Bloomingdale Village Treasurer	$15,316,933.51	Illinois State Checkbook
2024	State Board Of Education	Jersey County Cusd 100	$15,316,569.55	Illinois State Checkbook
2024	Revenue	Peru City Treasurer	$15,316,043.55	Illinois State Checkbook