- Ice Cream & Frozen Yogurt, Merrill
- Industrial & Commercial Cleaning Services & Companies, Merrill
- Industrial Contractors, Merrill
- Industrial Goods & Products - Hard Goods - Large, Merrill
- Industrial Goods & Products - Hard Goods - Small, Merrill
- Industrial Supply, Parts & Equipment - Miscellaneous, Merrill
- Industry, Merrill
- Information Bureaus & Services, Merrill
- Insulation Contractors, Merrill - Blown-In, Spray Foam, Batt, Fiberglass, Attic Insulation Installation & Service
- Insurance Carriers, Merrill
- Insurance Carriers By Specialty, Merrill
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- Insurance Contractors, Merrill
- Insurance Farm, Merrill
- Insurance Marine, Merrill
- Interior Designers, Merrill
- Interior Designers & Decorators, Merrill
- Investment Bankers, Merrill
- Investment Management Services, Merrill
- Investment Services & Advisors, Merrill
- Iron, Steel & Metal Fabricators, Merrill - Fabrication Companies
- Irrigation Systems & Equipment, Merrill
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