| Portfix AS | Stokke | 2025 |
| Portmakeren AS | Kleppestø | 2013 |
| Portmakeren Holding AS | Kleppestø | 2012 |
| Portowy Zaklad Techniczny Spolka Z Ograniczona Opdowiedzialnoscia Nuf | 81-341 Gdynia | 2021 |
| Portress AS | Hafrsfjord | 2023 |
| Portunus Solutions AS | Bergen | 2023 |
| Poseidon Frozen AS | Eidsnes | 2022 |
| Poshstitch AS | Oslo | 2024 |
| Positiv Reklame AS | Eidsvåg I Åsane | 1998 |
| Possess Holding AS | Øyslebø | 2022 |
| Postnord Strålfors AS | Oslo | 1987 |
| Postproduksjon AS | Oslo | 2004 |
| Potevilt AS | Hurdal | 2025 |
| Potl Møbelsnekkeri AS | Hauge I Dalane | 2021 |
| Pottemaker AS | Trondheim | 2023 |
| Potteriet Røros AS | Røros | 1997 |
| Poulsen Mekaniske AS | Kristiansand S | 2014 |
| Power Connection Nordic AS | Rudshøgda | 2023 |
| Power Farming AS | Sortland | 1998 |
| Power Heat Piping South AB | Se-21376 Malmö | 2021 |
| Power Service S.R.L. Nuf | It-20851 Lissone (Mb) | 2025 |
| Power Service Solutions GmbH | De-47059 Duisburg | 2025 |
| Power Systems (E&C) Limited | Burneside, Kendal La9 6Qq | 2026 |
| Powerboost AS | Selbu | 2017 |
| Powercontrol AS | Drammen | 1996 |
| Poweref - Refractory Company, Lda | Pt-2530-126 Lourinha | 2024 |
| Powerjaws AS | Kokstad | 2013 |
| Poweron AS | Hokksund | 2015 |
| Powerpunch AS | Årnes | 2006 |
| Powersupport AS | Skjeberg | 2022 |
| Powertech Marine Service AS | Skjervøy | 2020 |
| Powertrain Europe AS | Ski | 1992 |
| Powtech Holding AS | Åsgreina | 2010 |
| Praline AS | Tønsberg | 2019 |
| Pramlih AS | Nesttun | 1990 |
| Prasinus Holdings Ltd Nuf | Fornebu | 2014 |
| Prastlycke Svets O Smide Ivica Drozdjibob | Se-388 95 Halltorp | 2013 |
| Pratt & Whitney Military Norway AS | Oslo | 2000 |
| PRB Ginter Heronim Ginter | Pl-80-216 Gdansk | 2013 |
| PRC Robert Pieprzka | Pl-63-507 Kobyla Gora | 2024 |
| Pre-Form AS | Klæbu | 2016 |
| Preben From | Dk-7000 Fredericia | 2017 |
| Precise Resources AS | Kongsberg | 2012 |
| Precision Milling AS | Nøtterøy | 2020 |
| Precision Sveis AS | Larvik | 2026 |
| Precursor AS | Oslo | 2023 |
| Predator Boats Service & Production AS | Færvik | 2013 |
| Prefa Salg Ans | Malm | 1995 |
| Prefab Engineering AS | Stokke | 2023 |
| Preik Holding AS | Jørpeland | 2015 |
| Preline Fishfarming System AS | Bergen | 2000 |
| Premator Holding AS | Sannidal | 2024 |
| Premator Norge AS | Trondheim | 2013 |
| Premator Surface Pro AS | Sannidal | 2024 |
| Premium Boats Service AS | Nedenes | 2012 |
| Premium Nordic Holdings AS | Oslo | 2020 |
| Preplast Eiendom AS | Elnesvågen | 1991 |
| Preplast Industrier AS | Elnesvågen | 2006 |
| Presis Digitalprint AS | Elverum | 2016 |
| Presisjonssliperiet TM Raugstad AS | Sandnes | 2017 |
| Presterud's Eftf. AS | Flekkefjord | 2015 |
| Prestigious Textiles (Norway) a Division of Prestigious Textiles Limited | Bd4 0Sg Bradford | 2013 |
| Pretak AS | Larvik | 2021 |
| Pretech AS | Oslo | 1996 |
| Pretect AS | Klokkarstua | 1998 |
| Pretio AS | Ålesund | 2022 |
| Pretio Holding AS | Ålesund | 2022 |
| Pretre AS | Stryn | 2002 |
| Pretty Please AS | Molde | 2021 |
| Prevas Industrial Innovation AB | Se-721 03 Västerås | 2023 |
| Priebe | Dk-7000 Fredericia | 2015 |
| Prima 1 Bugøynes AS | Bugøynes | 2014 |
| Prima Blue AS | Egersund | 2019 |
| Prima Brands AS | Nærbø | 2002 |
| Prima Brands Group AS | Nærbø | 2007 |
| Prima Brands Holding AS | Egersund | 2017 |
| Prima Fisk AS | Bjørnevatn | 2022 |
| Prima Foods AS | Kolltveit | 2022 |
| Prima Pharma AS | Oslo | 2011 |
| Prima Protein AS | Egersund | 2017 |
| Prima Protein Holding AS | Egersund | 2024 |
| Prima Seafood AS | Egersund | 2018 |
| Prima Slakt AS | Nærbø | 2002 |
| Prima Trykk AS | Borgenhaugen | 2014 |
| Prima Trykk Holding AS | Borgenhaugen | 2013 |
| Prima-Vent | 6700 Esbjerg | 2002 |
| Primar AS | Folldal | 2017 |
| Primex Biochemicals AS | Haugesund | 2000 |
| Primex Norway AS | Myre | 2004 |
| Primtable AS | Aremark | 2014 |
| Primtronic AS | Oslo | 2024 |
| Primærtjenesten Bjoa AS | Bjoa | 2001 |
| Print & Profil AS | Mosby | 2016 |
| Print House Eiendom AS | Oslo | 2005 |
| Print Team AS | Lørenskog | 1981 |
| Print Tech AS | Bryne | 2020 |
| Printberry AS | Oslo | 1986 |
| Printbox AS | Lysaker | 2010 |
| Printers AS | Hafrsfjord | 1990 |
| Printex Trykkeri AS | Hamar | 1996 |