- Advanta Foundation
- Advent Software
- Advisor Technologies
- AEGIS Insurance Services, Inc.
- AEGON Transamerica Foundation
- AES Beaver Valley, Inc.
- AES Cilco Energy Delivery Unit
- AES Corporation
- AES Intricity, Inc.
- AES Ironwood Foundation
- AES New Energy
- AES Pacific Inc.
- AES Power Direct LLC
- AES Thames, Inc.
- AES/PALCO
- Aetna Foundation, Inc.
- Aetna Life and Casualty Foundation
- Aetna, Inc. - Matching Grant - Personal Donations
- AG Communication Systems
- AgriBank, FCB