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| ALTIVANN RØR OG VENTILASJON AS | 998605873 | BERGEN |
| ALT MED HUS OG HAGE AS | 926356194 | SANDNES |
| ALTMULIGGUTTA TOTALREHABILITERING AS | 987972610 | OSLO |
| ALUKO AS | 979731779 | GJERDRUM |
| Aluman Trondheim A/S | 846355022 | TRONDHEIM |
| ALUMINIUM FASADER AS | 975980596 | LARVIK |
| ALU-SERVICE AS | 911574462 | LILLESTRØM |
| ALUTEC AS | 941935400 | BJØRNAFJORDEN |
| ALVDAL BYGG AS | 977301890 | ALVDAL |
| ALVDAL GRAVESERVICE AS | 988414352 | ALVDAL |
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| ALVDAL TAKST AS | 893784292 | ALVDAL |
| ALVER ELEKTRO AS | 928901548 | ALVER |
| ALVER FLIS AS | 933176215 | ALVER |
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| A MARKUSSEN AS | 835000702 | NARVIK |
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| AMDAL ELEKTRO AS | 982122996 | OVERHALLA |
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| AMKA FLEX AS | 924002883 | FREDRIKSTAD |
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| ÅMLI MESTERBYGG AS | 911881594 | ÅMLI |
| AM MUR OG BETONG AS | 930283886 | FREDRIKSTAD |
| AM-SERVICE AS | 921092598 | TRONDHEIM |
| AMTEDAL & HANSEN ARKITEKTKONTOR AS | 982193664 | KRISTIANSAND |
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