- Bagels, Wellesley
- Baked Goods, Snacks & Sweets, Wellesley
- Bakeries, Wellesley
- Bank Supplies & Equipment, Wellesley
- Banks, Wellesley
- Barbers, Wellesley
- Bars & Grills, Wellesley
- Beauty Salons, Wellesley
- Bedroom Furniture Stores, Wellesley - Master & Kids Bedroom Furniture Sets & Beds
- Beverage Stores, Wellesley
- Book Stores, Wellesley
- Bookkeeping Services Licensed, Wellesley
- Bookkeeping Systems & Services, Wellesley
- Books, Magazines & Newspapers Stores, Wellesley - Bookstores
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- Boutiques & Boutique Items, Wellesley
- Breakfast Restaurants, Wellesley
- Brooms & Brushes Manufacturers, Wellesley
- Builders & Contractors, Wellesley
- Builders & Contractors - More, Wellesley
- Builders Hardware Stores, Wellesley
- Building & Home Inspection, Wellesley - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Wellesley - Construction Management & Consulting
- Building Materials & Supplies, Wellesley
- Bus Rental & Charter Bus Service, Wellesley
- Business & Professional Associations, Wellesley
- Business Legal Services, Wellesley
- Business Management Consultants, Wellesley
- Business Services, Wellesley
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