| Nimi | Paikkakunta |
|---|---|
| Aasialainen Hieronta | Oulu |
| AAVA CLOTHING | OULU |
| Aava Visual | Oulu |
| Ab PST event Oy | Oulu |
| Abbe Oy | Oulu |
| Abessinia Oy | Oulu |
| AC Automation Control Oy | Oulu |
| Academy Publisher | Oulu |
| AccelBit Oy | Oulu |
| ACIDUM OY | Oulu |
| Acmeli Oy | Oulu |
| Adama Oy | Oulu |
| Adekva Consulting Oy | Oulu |
| Adelia Forest Oy | Oulu |
| Adelia Group Oy | Oulu |
| Adelso Oy | Oulu |
| Adhesio Oy | Oulu |
| Admescope | Oulu |
| Adrian Grilli | Oulu |
| Advanced Realms Oy | Oulu |
| Advertising Media Finland Oy | Oulu |
| Advukaari Oy | Oulu |
| AER DESIGN | Oulu |
| Afora | Oulu |
| Africa Queen | Oulu |
Yritysesittely