| Clark Constructuion Group LLC MD | Construction | 0 | - | B |
| Clark County NV | Public Administration | 0 | - | D |
| Clark County Department of Aviation NV | Transportation & Warehousing | 0 | - | F |
| Clark County Government IN | Public Administration | 0 | - | A |
| Clark County Sheriff Department IN | Public Administration | 0 | - | C |
| Clark County Washington WA | Public Administration | 0 | - | F |
| Clark Distributing Co., Inc. KY | Wholesale Trade | 0 | - | F |
| Clark Emergency Physicians, PLLC KY | Healthcare & Social Assistance | 1 | $441,600 | - |
| Clark Equipment Company DBA Doosan Bobcat NC | Manufacturing | 0 | - | F |
| CLARK HUBBARD LLC Bub City IL | - | 0 | - | - |
| CLARK ILLINOIS LLC Ema IL | - | 0 | - | - |
| Clark Industries, INC MO | Manufacturing | 0 | - | F |
| Clark Kjos Architects, LLC OR | Professional & Technical Services | 1 | $77,834 | - |
| CLARK LOFT LLC Beatrix IL | - | 0 | - | - |
| Clark Lumber Company, LLC TN | Manufacturing | 0 | - | F |
| Clark Manufacturing MI | Manufacturing | 0 | - | B |
| CLARK Material Handling KY | Manufacturing | 0 | - | F |
| Clark Metal Products Company PA | Manufacturing | 0 | - | F |
| Clark Nexsen, Inc. VA | - | 1 | $87,776 | - |
| Clark Pacific CA | Manufacturing | 0 | - | D |
| Clark Pest Control of Stockton, Inc. CA | Administrative & Waste Services | 0 | - | F |
| Clark Regional Medical Center KY | Healthcare & Social Assistance | 0 | - | F |
| Clark Regional Physician Practices, LLC TN | - | 1 | $239,200 | - |
| Clark Retirement Community MI | Healthcare & Social Assistance | 0 | - | F |
| Clark Service Group PA | Other Services | 0 | - | F |
| Clark Technology LLC OH | Professional & Technical Services | 1 | $75,442 | - |
| Clark Transportation Consulting & Services, LLC NJ | Professional & Technical Services | 1 | $112,258 | A |
| Clark University MA | Educational Services | 6 | $66,800 | - |
| Clark, Richardson & Biskup Consulting Engineers, Inc. MO | - | 1 | $93,000 | - |
| Clark, Schaefer, Hackett & Co. OH | Professional & Technical Services | 1 | $71,885 | - |
| Clark-Lindsey Village, Inc. IL | Healthcare & Social Assistance | 0 | - | F |
| Clarke & Esposito LLC DC | Professional & Technical Services | 2 | - | - |
| Clarke American (Harland Clarke)-San Antonio TX | - | 0 | - | - |
| Clarke County Board of Education (School District) GA | Educational Services | 6 | $71,044 | - |
| Clarke County School District GA | Educational Services | 2 | $55,248 | - |
| Clarke Customer Care MA | Other Services | 0 | - | F |
| Clarke Distributors, Inc. NH | - | 0 | - | - |
| Clarks Ameriacs PA | - | 0 | - | - |
| Clarks Americas, Inc. CA | - | 0 | - | - |
| Clarks Americas, Inc. PA | Transportation & Warehousing | 0 | - | A |
| Clarks Americas, Inc. Distribution Facility PA | - | 0 | - | - |
| Clarkson Eyecare, LLC MO | Healthcare & Social Assistance | 2 | $77,000 | - |
| Clarkson Regional Health Services, Inc. NE | Administrative & Waste Services | 1 | $85,730 | - |
| Clarkson University NY | Educational Services | 6 | $90,422 | - |
| ClarksTech LLC MD | Professional & Technical Services | 7 | - | - |
| ClarksTech LLC NC | Professional & Technical Services | 9 | $103,210 | - |
| Clarkston-Potomac Group, INC. NC | - | 1 | $170,000 | - |
| Clarksville Foundry, Inc. TN | Manufacturing | 0 | - | F |
| Clarksville Health and Rehab VA | Healthcare & Social Assistance | 0 | - | - |
| ClarkWestern Dietrich Building Systems, LLC OH | Manufacturing | 1 | $99,629 | C |