E
| E.G. Artz | Brookfield |
| Eagle Optics | Middleton |
| Early Stage Research | Sun Prairie |
| EarthSubmit.com | Cottage Grove |
| E.C. Styberg, Engineering Co., Inc. | Racine |
| Econoprint | Verona |
| Eck Industries, Inc. | Manitowoc |
| ECM Motor Co. | Elkhorn |
| Edan Naturals | Wautoma |
| Eder Industries, Inc. | Oak Creek |
| Einstein Personal Communications | Little Chute |
| Electronic Theater Controls | Middleton |
| Ellsworth Adhesives | Germantown |
| Elm Grove Industries | Elm Grove |
| Emmpak Foods, Inc. | Milwaukee |
| Empire Level Manufacturing. Corp. | Mukwonago |
| Energy Center of Wisconsin | Madison |
| Enerpac | Milwaukee |
| Engineered Products Group, Div. Of DEC International | Madison |
| Environmental & Foundation Drilling | Waunakee |
| Environmental Protection Systems LLC | Elm Grove |
| E/Pax | Madison |
| Epic Systems Corporation | Madison |
| The Equitable Bank | Wauwatosa |
| ERDA Inc. | Peshtigo |
| Esker, Inc. | Madison |
| EST Company, Division Of Leggett & Platt Inc. | Grafton |
| EVCO Plastics | De Forest |
| Evenflo Co., Inc. | Suring |
| Everbrite, Inc. | Greenfield |
| Evolution Marketing |
| Evolving Door Coach | Janesville |
| Experts on Demand | Madison |
F
| The F. Dohmen Co. | Germantown |
| The Falk Corporation | Milwaukee |
| Farin & Associates | Madison |
| Felker Fabrication Div., Felker Brothers Corp. | Marshfield |
| Fifth Third Bank | Milwaukee |
| Filter Materials | Waupaca |
| Findorff | Madison |
| First Business Bank | Madison |
| First Business Capital Corp. | Madison |
| First Federal Capital Corp | LaCrosse |
| First Weber Group, Inc. | Madison |
| Fiserv Inc | Brookfield |
| The Fish 105.3 | Milwaukee |
| Fiskars Brands, Inc. | Madison |
| Flad & Associates | Madison |
| Flaherty & Associates | |
| Flambeau | Baraboo |
| Flambeau Sports Outfitters | Phillips |
| Fleck Controls, Inc. | Brookfield |
| The Flex Company | Brookfield |
| FlexFab Molded Products LLC | East Troy |
| Flodar | Manitowoc |
| Fluid System Components, Inc. (FSC) | Green Bay |
| FOF Incorporated | Delavon |
| Foley & Lardner | Madison |
| Fond du Lac Area Job & Career Center | Fond du Lac |
| Forrer Business Interiors | Milwaukee |
| Fortel Studios | McFarland |
| ForumNet | Madison |
| Four Lakes Colorgraphics | Madison |
| Fox Midwest Transport Inc. | Green Bay |
| Fox River Paper Co. | Appleton |
| Fox River Publishing Co. | Wautoma |
| Frank Pasternak & Associates S.C. | Milwaukee |
| The Frantz Group | Grafton |
| Fresh Brands Inc | Sheboygan |
| Fristam Pumps, Inc. | Middleton |
| Funnel Incorporated | Middleton |
| Furton Dozing and Equiptment Repair | Viroqua |
