| Abbreviation | Definition |
|---|---|
| AIGL | Aselu Investment Group Limited |
| AIGS | Albi Investment Group Services |
| AII | Apartment Income Investors |
| AIIB | Asia Infrastructure Investment Bank |
| AIIF | African Infrastructure Investment Fund |
| AIIF | Allianz Impact Investment Fund |
| AIIF | Arab International Investor Forum |
| AIIG | Australian Investment Insurance Group |
| AIIM | African Infrastructure Investment Managers |
| AIIR | Annual investment income report |
| AIM | Action and Investment to defeat Malaria |
| AIM | Annual Investment Meeting |
| AIMCO | Alberta Investment Management Corporation |
| AIMI | Apartment Investment Market Index |
| AIMS | Academic Investment in Mathematics and Science |
| AIO | Automotive Investment Organization |
| AIP | Alternative Investment Partners |
| AIP | Alternative Investment Product |
| AIP | Alternative Investment Products |
| AIPF | African Investment Promotion Forum |