- Allianz Investment Corporation
- Allied Irish Bank
- Allied Signal
- Allied Signal Foundation, Inc.
- Allied World Assurance (U.S.) Inc
- Allmerica Financial
- Allstate
- Allstate Giving Campaign
- Allstate Giving Campaign
- Allstate Insurance Company
- Alltech Electric, Inc.
- Alltrista
- Ally (formerly known as GMAC Financial Services)
- Alterra Capital Group Ltd.
- Altran Corporation
- Altria Group, Inc.
- Altria Group, Inc.
- Alyeska Pipeline Service Company
- Alza
- Ambac Financial Group, Inc.