Sähkö
| Yritys | Maa | |
|---|---|---|
| ABB Oy | Finland | |
| Abloy Oy | Finland | |
| Aerial Oy | Finland | |
|
AGCO Power Oy - Power Generation | Finland |
| AH-Control Oy | Finland | |
| Ahlsell Oy | Finland | |
| Aicci Oy | Finland | |
| Oy Airam Electric Ab | Finland | |
| ALL-Talotekniikka Oy | Finland | |
|
AMT Hakemistot Oy | Finland |
| Apex Automation Oy | Finland | |
| Aura Light Oy | Finland | |
| Aurinkosähkötalo Eurosolar Oy | Finland | |
| AT-Marine Oy, Autrosafe | Finland |
