| 1939 Games ehf. | Reykjavík Constituency North |
| 1984 Ehf. | Reykjavík Constituency North |
| 3Z | |
| Abler ehf. | |
| Advania | Reykjavík Constituency North |
| Agile hópurinn | Reykjavík Constituency North |
| AGR Dynamics ehf. | Southwest Constituency |
| Akthelia | |
| Aldin Dynamics Ehf. | Reykjavík Constituency North |
| Allra Átta | Southwest Constituency |
| ALVAR Mist Ehf. | |
| Alvotech | Reykjavík Constituency North |
| Anitar | Reykjavík Constituency North |
| Ankeri Solutions Ehf. | Reykjavík Constituency North |
| Annata | Reykjavík Constituency North |
| Arctic Green Energy | Southwest Constituency |
| Arctic Theory | Southwest Constituency |
| Arctic Therapeutics | Reykjavík Constituency North |
| ArcticMass | |
| Arion banki hf. | Reykjavík Constituency North |
| Atlas Primer ehf. | Southwest Constituency |
| Auðkenni | |
| Avista Ehf. | Reykjavík Constituency North |
| AwareGO | Reykjavík Constituency North |
| Belgingur ehf. | |
| Belginpur | |
| Bifröst University | Northwest Constituency |
| Birtingahúsið | Reykjavík Constituency North |
| Bókun | |
| Booking Factory | |
| Bungalo | |
| CCP hf. | Reykjavík Constituency North |
| Centara | Reykjavík Constituency North |
| Chip & PIN Solutions Ltd | Southwest Constituency |
| Codland.is | |
| Computer.is | Reykjavík Constituency North |
| Controlant hf. | Southwest Constituency |
| Coripharma | |
| CrankWheel ehf. | Southwest Constituency |
| Curio Ehf. | |
| Dacoda ehf. | Southwest Constituency |
| Datera ehf. | Reykjavík Constituency North |
| deCODE genetics | Reykjavík Constituency North |
| Dent & Buckle | Reykjavík Constituency North |
| dk hugbúnaður ehf. | Southwest Constituency |
| Dohop | Reykjavík Constituency North |
| DTE ehf | |
| Einar Egilsson | Reykjavík Constituency North |
| EMCO Software | Reykjavík Constituency North |
| EpiEndo Pharmaceuticals | Reykjavík Constituency North |