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| Roar Pelsindustri AS | Sandvika | 2018 |
| Roar Stang Kjøtt AS | Råde | 2005 |
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| Robotservice AS | Tangen | 2014 |
| Roboxi AS | Stavanger | 2018 |
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| Robust Maskin Senter AS | Rena | 2011 |
| Roche Diagnostics GmbH | De-68305 Manheim | 2022 |
| Rochs Industrier AS | Ørskog | 2012 |
| Rock AS | Harstad | 2016 |
| Rockpore AS | Holmestrand | 2020 |
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| Rockwool Polska Spolka Z Ograniczona Odpowiedzialnoscia | Pl-66-131 Cigacice | 2021 |
| Rodco AS | Brårud | 2014 |
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| Rodeo Holding AS | Nærbø | 2012 |
| Rodopi Wind Service GmbH & Co. KG Nuf | De-40472 Düsseldorf | 2025 |
| Rodoverken AB | Se 442 48 Kungälv | 2020 |
| Roel Produkter AS | Steinkjer | 2015 |
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| Rogaland Bioenergi AS | Hommersåk | 2017 |
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| Rollover AS | Mysen | 2000 |
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| Rolls-Royce Deutschland | D-21107 Hamburg | 2014 |
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| Rolls-Royce Power Systems AG | De-88045 Friedrichshafen | 2017 |
| Rollsense AS | Ulsteinvik | 2018 |
| Rolog Solutions AS | Narvik | 2024 |
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| Rolvsøy Ølverksted AS | Rolvsøy | 2022 |
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| Romeriksbunad AS | Jessheim | 2017 |
| Romiro Holding AS | Tustna | 2022 |
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| Romsdal-Invest AS | Tverrelvdalen | 2019 |
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| Rondane Produksjon AS | Otta | 2020 |
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| Ronia AS | Randaberg | 2018 |