C
| C&D Technologies, Inc., Dynasties Div. | Milwaukee |
| C&H Packaging Company, Inc. | Merrill |
| >C2 Graphics Productivity Solutions | Madison |
| Cain Industries | Germantown |
| Campbell Lacoste, Inc. | Madison |
| Canadian National Railroad | Stevens Point |
| Capitol Consultants, Inc | Madison |
| Capitol Indemnity Corporation | Madison |
| Career Momentum Inc. (Madison) | |
 | “Helping you make sound employment decisions.” Coaching and assessments for career development, outplacement, spousal relocation, employee selection, promotion, and leadership development. Background checks. |
| Cartographic Solutions, Inc. | Madison |
| Cascade Asset Management, LLC | Madison |
| Castle Controls & Automation, LLC | Cascade |
| Catalyst International Inc. | Milwaukee |
| Centec Security Systems, Inc. | Wauwatosa |
| Central Engineering Co. | Oshkosh |
| Central Products Co. | Menasha |
| Central Wisconsin Engineers & Architechts, Inc. | Weston |
| Centrose | Madison |
| Centuar Forge LLC | Burlington |
| Centuar Systems | Madison |
| Century Drill & Tool Co. | Green Bay |
| C.G. Bretting Manufacturing Company, Inc. | Ashland |
| Chart Heat Exchangers | LaCrosse |
| Chemscan | Waukesha |
| Cherry Electrical Products | Pleasant Prarie |
| Chiquita Processed Foods, LLC | New Richmond |
| Chris Writer Publishing | Montello |
| Church Metal Spinning Co. | Milwaukee |
| Church Mutual Insurance Company | Merrill |
| Cindy Gerke & Associates, Inc., Realtors | Onalaska |
| City Brewing Company | La Crosse |
| Clack Corporation | Windsor |
| Clague Sales Corp. | Thiensville |
| Clarks Realty | Blue River |
| Clavette Insurance Services | Franklin |
| Clifton Gunderson Financial Services LLP | Madison |
| Clotho Advanced Media, Inc. | Madison |
| CNH Global | Racine |
| Cobalt Corp | Milwaukee |
| Collapsible Wire Products | Butler |
| Color Arts, Inc. | Racine |
| Color Graphic Systems | New Berlin |
| Commercial Communications, Inc. | Hartland |
| CommIT-Small Business Solutions | |
| Communication Technologies, Inc. | Middleton |
| Competitive Mailing | Wauwatosa |
| Computer Aided Technology, Inc. (CATI) | Madison |
| Computer Knowledge | Stoughton |
| Conley Publishing Group, Ltd. | Beaver Dam |
| Connecting DOTS | Madison |
| Consultis | Madison |
| Contact Rubber Corp. | Bristol |
| Continental Airlines | |
| Continental Mapping | Sun Pairie |
| Core Creative, Inc. | Wisconsin Dells |
| CoreComm | |
| Corporate Impressions | De Pere |
| Covance | Madison |
| Cover-All Building Systems | Stratford |
| CPM (Customer Potential Management) | Middleton |
| CR Morgans | East Troy |
| Crafted Plastics, Inc. | Sheboygan |
| Crane Realty | Chetek |
| Creative Communication Concepts | Brookfield |
| Creative Images | Elm Grove |
| Creative Video Editing | Madison |
| Criticare Systems Inc. | Waukesha |
| Cronometro | Madison |
| Cube 216, LLC | Madison |
| Cummings Enterprises, Inc. | Madison |
| CUNA Credit Union | |
| CUNA & Affiliates | Madison |
| CUNA Mutual Group | |
| Curran, Hollenbeck & Orton, S.C. | Mauston |
| Curwood, Inc. | Oshkosh |
| Custom Wood Products, Inc. | Kewaukee |
| Cyber Cycle Inn Studio | Rice Lake |
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| D&M Bookkeeping | Germantown |
| Daily Cardinal, The | |
| Dairy Equipment Co. | Madison |
| Dallas & Mavis Forwarding Co | Kenosha |
| Dalmation Ink | Madison |
| Dane County Humane Society | Madison |
| Dane Solutions | Madison |
| Dan’s Travel | Madison |
| David Hobbs Honda | Glendale |
| Dayco Eastman | Manitowoc |
| Dayton’s Commercial Interiors (DCI) | Madison |
| DC Motors Inc. | Merrill |
| DCI Marketing Inc. | Milwaukee |
| Dean Fowler Associates, Inc. | Brookfield |
| Dean Group Media | Thiensville |
| Dean Health System | Madison |
| Dean Specialty Foods Group | Green Bay |
| DeBoer Inc | Blenker |
| DecisionParteners Limited | Reedsburg |
| Decor Products Inc. | Wausaukee |
| Dehumidifier Corporation of America | Cedarburg |
| Delarue | Watertown |
| Delphinus, LLC | Sauk City |
| Delta Airlines | |
| The DeMattia Group | Milwaukee |
| Demco | Madison |
| Derby Plastics, Ltd. | Neenah |
| Design Concepts | Madison |
| Design Homes, Inc. | Prairie Du Chein |
| Design Specialties | Milwaukee |
| Devilishly Delightful Gormet Cheesecakes, Inc. | |
| DeWitt Ross & Stevens | Madison |
| Dicks Supermarket | Platteville |
| The Dieringer Research Group Inc. | Milwaukee |
| Digital Age Development, Inc. | DeForest |
| Dining Room at 209 Main, The | Monticello |
| Discount Ramps.Com | West Bend |
| Direct-Pharmacy.com | Marshall |
| DiscoverNet | Eau Claire |
| Discovery Farms | Pigeon Falls |
| Distillery Design | Madison |
| DJ’s Repair | Withee |
| DL Engraving | Phillips |
| DMC Advertising & Direct Marketing | Pewaukee |
| DMI (Data Mining Institute) | Madison |
| DNAStar | Madison |
| Doig Corporation | Cedarburg |
| Dollar Rent A Car Systems, Inc. | |
| Don Miller | Madison |
| Door County Vacation Rentals | |
| Dorner Manufacturing Corp. | Hartland |
| Dorsch Ford | Green Bay |
| Double Diamond Realty | Mosinee |
| Douglas Dynamics LLC | Milwaukee |
| Douglass Pianos | Middleton |
| Doyleweb Services, LLC | |
| Drums n’ Moore | |
| Dremel | Racine |
| DRS Ahead Technology, Inc. | St. Croix Falls |
| DSI Holdings Inc. (The DSI Network) | Appleton |
| Durline Scales and Manufacturing | Madison |
| Durable Controls | Hartland |
| Durrani Law Firm | Madison |
