| A. O. Smith (AOS) |
| A.M. Best |
| Aart de Geus |
| ABB (Asea Brown Boveri) |
| Abbott Laboratories (ABT) |
| AbbVie (ABBV) |
| ABS (资产支持证券) |
| ABS Capital Partners |
| Absolute advantage |
| Abu Dhabi Developmental Holding Company (ADDHC) |
| Abu Dhabi Investment Authority (ADIA) |
| Abu Dhabi Securities Exchange (ADX) |
| Acadian Asset Management |
| Accel |
| Accel-KKR |
| Accenture (ACN) |
| Accounting |
| Accounts Payable (AP) |
| Accounts Receivable (AR) |
| Acquisition |
| acquisition, takeover, or merge |
| Activision Blizzard (ATVI) |
| Acuson |
| Adjustable-Rate Mortgages (ARMs) |
| ADM (Archer Daniels Midland Company) |
| Adobe (ADBE) |
| Advance Auto Parts (AAP) |
| Advanced Driver Assistance Systems (ADAS) |
| Advanced Micro Devices (AMD) |
| Advent International |
| Advil |
| ADX General Index |
| AEA Investors |
| AES Corporation |
| AEX Index (Amsterdam Exchange Index) |
| Affiliate |