| $350,000–1 million | THE LAUREATE GROUP, INC. | WAUKESHA, WI | Johnson Bank |
| $2–5 million | THE MAREK GROUP, INC. | WAUKESHA, WI | First Midwest Bank |
| $350,000–1 million | THE REMOND COMPANY | WAUKESHA, WI | Johnson Bank |
| $350,000–1 million | THE SCAN GROUP, INC. | WAUKESHA, WI | National Exchange Bank and Trust |
| $5–10 million | THE SPANCRETE GROUP, INC. | WAUKESHA, WI | BMO Harris Bank National Association |
| $350,000–1 million | THE VANDERBLOEMEN GROUP LLC | WAUKESHA, WI | Bank of the West |
| $150,000–350,000 | THE WOMEN'S CENTER, INC. | WAUKESHA, WI | WaterStone Bank, SSB |
| $1–2 million | THERM-TECH OF WAUKESHA, INC. | WAUKESHA, WI | Westbury Bank |
| $150,000–350,000 | THERMET, INC. | WAUKESHA, WI | North Shore Bank, FSB |
| $150,000–350,000 | THREE TREE MARKETING CORP | WAUKESHA, WI | Town Bank, National Association |
| $150,000–350,000 | THUEMLING INDUSTRIAL PRODUCTS, INC. | WAUKESHA, WI | Waukesha State Bank |
| $150,000–350,000 | THUEMLING INSTRUMENT GROUP, INC. | WAUKESHA, WI | Waukesha State Bank |
| $350,000–1 million | TIP TECHNOLOGIES, INC. | WAUKESHA, WI | Waukesha State Bank |
| $150,000–350,000 | TOEPFER SECURITY CORPORATION | WAUKESHA, WI | Johnson Bank |
| $150,000–350,000 | TRINITY EVANGELICAL LUTHERAN CHURCH | WAUKESHA, WI | Waukesha State Bank |
| $150,000–350,000 | TRITECH CORPORATION OF AMERICA | WAUKESHA, WI | Associated Bank, National Association |
| $150,000–350,000 | TRUCKSERV ENTERPRISES LLC | WAUKESHA, WI | Old National Bank |
| $150,000–350,000 | TWO DAY PAINTING LLC | WAUKESHA, WI | Associated Bank, National Association |
| $350,000–1 million | UNIVERSAL WELDING & ENGINEERING, INC. | WAUKESHA, WI | Waukesha State Bank |
| $350,000–1 million | UROLOGY ASSOCIATES,LTD, S.C. | WAUKESHA, WI | First Midwest Bank |
| $350,000–1 million | V&L TOOL, LLC | WAUKESHA, WI | Commerce State Bank |
| $150,000–350,000 | WALDEN NEITZKE & KUHARY SC | WAUKESHA, WI | Waukesha State Bank |
| $150,000–350,000 | WALKOWICZ, BOCZKIEWICZ & CO., S.C. | WAUKESHA, WI | Signature Bank |
| $350,000–1 million | WAUKESHA CATHOLIC SCHOOL SYSTEM, INC. | WAUKESHA, WI | Waukesha State Bank |
| $150,000–350,000 | WAUKESHA COUNTY COMMUNITY DENTAL CLINIC, INC. | WAUKESHA, WI | First Business Bank |
| $150,000–350,000 | WAUKESHA CRANE CRANE SALES & SERVICE INC | WAUKESHA, WI | U.S. Bank, National Association |
| $150,000–350,000 | WAUKESHA FLORAL & GREENHOUSE, INC. | WAUKESHA, WI | First Federal Bank of Wisconsin |
| $1–2 million | WAUKESHA FOUNDRY, INC. | WAUKESHA, WI | The Huntington National Bank |
| $350,000–1 million | WAUKESHA HEALTCARE AND REHABILITATION CENTER LLC | WAUKESHA, WI | Old Second National Bank |
| $150,000–350,000 | WAUKESHA HEART INSTITUTE, LTD. | WAUKESHA, WI | Waukesha State Bank |
| $350,000–1 million | WAUKESHA IMPORTS, LLC | WAUKESHA, WI | BMO Harris Bank National Association |
| $1–2 million | WAUKESHA IRON & METAL, INC. | WAUKESHA, WI | Signature Bank |
| $350,000–1 million | WAUKESHA PEDIATRIC ASSOCIATES, LTD. | WAUKESHA, WI | Waukesha State Bank |
| $350,000–1 million | WAUKESHA SURGICAL SPECIALISTS, S.C. | WAUKESHA, WI | Waukesha State Bank |
| $150,000–350,000 | WAUSAU HOLDINGS LLC | WAUKESHA, WI | Nicolet National Bank |
| $2–5 million | WELDALL MFG., INC. | WAUKESHA, WI | Johnson Bank |
| $350,000–1 million | WEST NEW BROOK ORTHODONTISTS, S.C. | WAUKESHA, WI | Johnson Bank |
| $150,000–350,000 | WESTRIDGE BUILDERS, INC. | WAUKESHA, WI | Town Bank, National Association |
| $150,000–350,000 | WHEELS NOW INC. | WAUKESHA, WI | BMO Harris Bank National Association |
| $350,000–1 million | WHITELIGHT GROUP, INC. | WAUKESHA, WI | Westbury Bank |
| $350,000–1 million | WILD MARKETING GROUP, INC. | WAUKESHA, WI | Associated Bank, National Association |
| $150,000–350,000 | WILDE AUTOMOTIVE MANAGEMENT OF WISCONSIN, INC. | WAUKESHA, WI | Waukesha State Bank |
| $2–5 million | WILDE AUTOS, INC | WAUKESHA, WI | Toyota Financial Savings Bank |
| $1–2 million | WILDE MOTORS, INC | WAUKESHA, WI | Toyota Financial Savings Bank |
| $150,000–350,000 | WINDOW CONCEPTS OF MILWAUKEE, INC. | WAUKESHA, WI | BMO Harris Bank National Association |
| $350,000–1 million | WINDOW SOLUTIONS, INC. | WAUKESHA, WI | State Bank of Cross Plains |
| $2–5 million | WISCONSIN EVANGELICAL LUTHERAN SYNOD | WAUKESHA, WI | Town Bank, National Association |
| $150,000–350,000 | WISCONSIN EVANGELICAL LUTHERAN SYNOD KINGDOM WORKERS, INC. | WAUKESHA, WI | BMO Harris Bank National Association |
| $150,000–350,000 | WISCONSIN INDUSTRIAL MACHINE SERVICE, INC. | WAUKESHA, WI | Waukesha State Bank |
| $1–2 million | WISCONSIN METAL PARTS INC | WAUKESHA, WI | Wisconsin Bank & Trust |
| $350,000–1 million | WISCONSIN STATE HOME SERVICES INC. | WAUKESHA, WI | WaterStone Bank, SSB |
| $150,000–350,000 | WISCONSIN STEAM CLEANER SALES COMPANY, INC | WAUKESHA, WI | First Federal Bank of Wisconsin |
| $350,000–1 million | WISCONSIN TITLE SERVICE COMPANY, INC. | WAUKESHA, WI | Waukesha State Bank |
| $350,000–1 million | WISCONSIN UTILITY EXPOSURE, INC. | WAUKESHA, WI | First Midwest Bank |
| $150,000–350,000 | WISCONSIN WINDOW CONCEPTS INC | WAUKESHA, WI | Sunset Bank & Savings |
| $350,000–1 million | WISSEN INFOTECH, INC. | WAUKESHA, WI | JPMorgan Chase Bank, National Association |
| $150,000–350,000 | WOMEN'S HEALTH CARE, S.C. | WAUKESHA, WI | Waukesha State Bank |
| $1–2 million | WOODWAY USA, INC. | WAUKESHA, WI | CIBM Bank |
| $350,000–1 million | Z MIX USA, INC. | WAUKESHA, WI | First Midwest Bank |
| $2–5 million | ZIGNEGO COMPANY, INC. | WAUKESHA, WI | First Midwest Bank |
| $1–2 million | ZIGNEGO READY MIX, INC. | WAUKESHA, WI | First Midwest Bank |