- Gilbane Inc.
- Genentech
- General Motors
- Good Earth Energy Conservation Inc.
- General Dynamics Corporation
- Georgia Gulf Corporation
- Gillette Company, The
- General Reinsurance Corporation
- Golden State Mutual Life Insurance Company
- Gannett Company
- Glover Park Group, The
- G Data Software
- GFI Software
- Gensler
- Gilead Sciences Inc.
- Grupo Vidanta