| Insurance | C.A. Paulino & Associates, Inc. | 477-0022 |
| Attorneys & Law Offices | Cabot Mantanona LLP | (671) 646-2001 |
| Shipping, Tuna Transshipment & Other Related Services | Cabras Marine Corporation | (671) 477-1818 / 7345 / (671) 649-1380 |
| Associate Member | California Pacific Technical Services, LLC | (671) 646-3645/46/48 |
| Mini-Conglomerates | Calvo Enterprises, Inc. | (671) 472-6852 |
| Insurance | Calvo's Insurance Underwriters, Inc. | (671) 472-6816 |
| Attorneys & Law Offices | Camacho Calvo Law Group LLC | (671) 472-6813 |
| Freight Services | Cargo Express, Inc. | (671) 649-5221 |
| Automobile Dealers, Rentals & Services | Cars Plus, LLC | (671) 477-7807 |
| Insurance | Cassidy's Associated Insurers, Inc. | (671) 472-8834 |
| Business Services | Catalyst Pacific | (671) 300-7695 |
| Real Estate Management, Appraisers & Development Firms | Century 21 Commonwealth Realty | (671) 649-2121 |
| Real Estate Management, Appraisers & Development Firms | Century 21 Realty Management Company, Inc. | (671) 647-5003 |
| School/Training | Chief Hurao, Inc. | (671) 472-5858 |
| Associate Member | Chinese Chamber of Commerce in Guam | (671) 646-2168 |
| Communications | Choice Phone, LLC. dba iConnect | (671) 888-8888 |
| Associate Member | Church of Jesus Christ of LDS | (671) 777-9298 |
| Banks, Credit Institutions & Mortgage Brokers | Coast360 Federal Credit Union | (671) 477-8736 |
| Real Estate Management, Appraisers & Development Firms | Cochran Realty | (671) 472-2934 |
| Architectural & Engineering Services | Coffman Engineers, Inc. | (671) 300-7531 |
