| Advanced Drainage Systems Inc. | 7 | $4,705 | Mar 6, 2023 |
| Advanced Wall, Inc. | 3 | $1,932 | Sep 22, 2025 |
| Allen Homes Incorporated | 10 | $6,260 | Aug 21, 2018 |
| Bart Ruba Construction | 5 | $3,300 | May 23, 2016 |
| Beal Derkenne Construction LLC | 4 | $5,897 | Feb 21, 2018 |
| Big Ten Rentals | 17 | $9,425 | Dec 19, 2025 |
| Blake Hershberger Enterprises, LLC | 1 | $6,250 | Feb 15, 2022 |
| Chicago Used and New Tires | 6 | $0 | Oct 14, 2025 |
| City Construction | 4 | $2,125 | Feb 17, 2026 |
| Croell, Inc. | 3 | $2,577 | Apr 16, 2025 |
| Day Mechanical Systems Inc. | 11 | $19,250 | Jun 18, 2025 |
| Deery Brothers Motors of Iowa City, Inc. | 1 | $2,926 | May 4, 2022 |
| Diamond Ridge Construction, LLC | 2 | $4,688 | May 13, 2025 |
| Ecco Midwest Inc. | 19 | $3,612 | Jun 22, 2022 |
| Engie North America Inc. | 4 | $27,500 | Mar 31, 2021 |
| Erger Construction LLC | 3 | $6,894 | Aug 11, 2025 |
| Foundations Unlimited Inc. | 5 | $3,500 | Jul 17, 2019 |
| Heriberto Munoz | 5 | $6,000 | Jul 15, 2016 |
| Heyn's Ice Cream | 2 | $125 | Dec 1, 2015 |
| HTH Companies, Inc. | 3 | $40,720 | Mar 16, 2023 |
| Icc LLC | 11 | $56,000 | Jun 12, 2020 |
| Iowa City Community School District | 24 | $13,150 | Apr 17, 2018 |
| Iowa City, City of | 30 | $19,607 | Mar 11, 2021 |
| Iowa-Illinois Taylor Insulation, Inc. | 14 | $2,588 | Oct 17, 2023 |
| Kelly Heating & Air Conditioning, Inc | 1 | $311 | Aug 21, 2018 |
| Larson Builders Inc. | 5 | $2,550 | Mar 15, 2017 |
| Leeds West Group | 2 | $8,778 | Mar 4, 2022 |
| Loparex LLC | 8 | $24,419 | Aug 26, 2022 |
| Maxwell Construction, Inc. | 27 | $50,945 | Mar 20, 2025 |
| McComas Lacina Construction | 12 | $17,125 | Feb 17, 2026 |
| McComas-Lacina Construction, LC | 2 | $1,787 | Apr 8, 2015 |
| Metro Pavers, Inc. | 17 | $6,846 | Sep 13, 2023 |
| Midstates Development Inc | 3 | $6,959 | Nov 7, 2019 |
| Mobile Maintenance Solutions LLC | 7 | $2,450 | May 22, 2017 |
| Muller Plumbing & Heating Inc | 6 | $400 | Aug 21, 2018 |
| Noel's Tree & Crane Service, Inc. | 1 | $900 | Oct 9, 2017 |
| Oral-B Laboratories G.P. | 1 | $470 | Feb 22, 2024 |
| Pleasant Valley Golf Course | 1 | $2,344 | Aug 15, 2024 |
| Procter and Gamble | 2 | $12,372 | Mar 24, 2025 |
| R. R. Donnelley & Sons | 2 | $5,000 | Dec 3, 2025 |
| Revolution Energy Systems, Inc | 3 | $15,000 | Oct 14, 2022 |
| RJ Fencing | 3 | $2,000 | Jun 11, 2024 |
| Rushton Sheet Metal | 2 | $1,025 | Jul 27, 2016 |
| Sedona Staffing | 2 | $1,300 | Apr 7, 2025 |
| State University of Iowa | 3 | $26,787 | Nov 4, 2024 |
| Superior Welding & Fabrication | 4 | $5,114 | Jun 25, 2019 |
| Tricon Construction Group | 25 | $25,092 | Jan 14, 2026 |
| Turfmasters Lawn and Landscape LLC | 3 | $1,094 | Dec 5, 2018 |
| United Natural Foods Inc. | 5 | $1,975 | Jun 27, 2017 |
| University of Iowa | 93 | $69,140 | Dec 16, 2022 |
| University of Iowa Hospitals and Clinics | 57 | $51,879 | Aug 2, 2023 |
| University of Iowa Housing & Dining | 3 | $5,543 | Feb 22, 2019 |