| Overgate Properties Ltd | Real estate | 2020 |
| Overgate Subsea Engineering Ltd | Manufacturing | 2019 |
| PA Floor Sanding Ltd | Construction | 2022 |
| Packetwize Services Limited | Administrative & support | 2020 |
| Panda Cafe Montrose Ltd | Hospitality | 2025 |
| Panmure Property Limited | Real estate | 2026 |
| Park Hotel Montrose Ltd | Hospitality | 2026 |
| Paul Enright Ltd | Professional & scientific | 2024 |
| Paul Young Services Ltd | Professional & scientific | 2025 |
| PBR MMS Ltd | Professional & scientific | 2017 |
| Peace by Peace Limited | Construction | 2015 |
| Peebles Lettings Limited | Real estate | 2024 |
| Pegu Property Limited | Real estate | 2021 |
| Pelangi Gifts Ltd | Manufacturing | 2011 |
| Perfect Harmony (Scotland) Limited | Other services | 2004 |
| Performance Sledging Ltd | Other services | 2021 |
| Person-Centred Practice International Community of Practice C.I.C. | Health & social care | 2022 |
| Pert Bruce Holdings Limited | Financial services | 2017 |
| Pert Bruce Homes East Limited | Construction | 2018 |
| Pert Bruce Homes Limited | Construction | 2018 |
| Pert Bruce Homes North Limited | Construction | 2018 |
| Pert Bruce Homes South Limited | Construction | 2018 |
| Peters & Hynd (Joiners) Limited | Construction | 2007 |
| Pholus Ltd | Administrative & support | 2017 |
| Pinks Pyramid Ltd | Real estate | 2025 |
| Plainview Ltd | Mining & quarrying | 2014 |
| Plug Montrose Limited | Administrative & support | 2023 |
| PMR Jewellery Ltd | Wholesale & retail | 2014 |
| PNM Engineering Limited | Professional & scientific | 2025 |
| Polar Well Services Ltd | Mining & quarrying | 2023 |
| Postoglu Barber Ltd | Other services | 2025 |
| PRD Consulting Ltd | Professional & scientific | 2021 |
| Prestige Home Development (Scotland) Ltd | Construction | 2026 |
| Primo Property Developments Ltd | Real estate | 2025 |
| Primo Stays Ltd | Households | 2025 |
| Procurement Story Limited | Professional & scientific | 2018 |
| Progression SKI and Snowboard School Limited | Arts & recreation | 2001 |
| Promo: Montrose Community Enterprise Ltd | Construction | 2024 |
| Promo: Montrose Development and Improvement CIC | Construction | 2023 |
| PSP Properties (Scotland) Ltd | Construction | 2024 |
| Pullar Fishing Limited | Agriculture & fishing | 2018 |
| Quayside Gourdon Limited | Hospitality | 2016 |
| R & L Tidman Ltd | Construction | 2024 |
| R & S Dickson Limited | Transport & logistics | 2013 |
| R J Barclay Developments Ltd | Mining & quarrying | 2011 |
| R K Services (Montrose) Limited | Wholesale & retail | 2003 |
| R L T T Services Limited | Mining & quarrying | 2014 |
| R.B. Millar Limited | Administrative & support | 1995 |
| RAH Renewables Ltd | Construction | 2016 |
| Raisepower Ltd | Professional & scientific | 2005 |
| Ramsay Energy Ltd | Mining & quarrying | 2019 |
| Ravendale Completions Ltd | Mining & quarrying | 2011 |
| Raymond Davidson Ltd | Administrative & support | 2007 |
| RB Well Services Ltd | Mining & quarrying | 2009 |
| Red Steel Ltd | Manufacturing | 2016 |
| Redcap Games Ltd | Wholesale & retail | 2023 |
| Redking Intervention Ltd | Manufacturing | 2015 |
| REDTWO591 Ltd | Professional & scientific | 2019 |
| Rejan Technologies Ltd | Manufacturing | 2022 |
| Relmaint Ltd | Professional & scientific | 2026 |
| Rengor Ltd | Construction | 2024 |
| Rennie IT Solutions Ltd | Information & communication | 2026 |
| Reseni Limited | Wholesale & retail | 2017 |
| Revive and Drive Limited | Construction | 2013 |
| RGB Process & Pipeline Services Ltd | Mining & quarrying | 2019 |
| RGL Electrical & Joinery Ltd | Construction | 2019 |
| Rhaetian Ltd | Mining & quarrying | 2013 |
| Rise Commercial Ltd | Real estate | 2025 |
| Riseman Subsea Ltd | Manufacturing | 2026 |
| Risk Dimensions Ltd | Professional & scientific | 2012 |
| RLR Engineering Limited | Professional & scientific | 2013 |
| RM Services (Montrose) Ltd | Mining & quarrying | 2006 |
| ROB Stables Ltd | Mining & quarrying | 2023 |
| Robb Joinery and Carpentry Ltd | Construction | 2013 |
| Robbie’S Well Services Ltd | Professional & scientific | 2025 |
| Robertson Studios Ltd | Information & communication | 2018 |
| Rohgi IT Ltd | Administrative & support | 2006 |
| Rompers Private Nursery Ltd | Education | 2016 |
| Ronnies Courier Service Limited | Transport & logistics | 2020 |
| Roo's Leap (Montrose) Limited | Hospitality | 2019 |
| Roofers Scotland Limited | Other services | 2024 |
| Roscot Ltd | Mining & quarrying | 2007 |
| Rose Design Services Ltd | Professional & scientific | 2013 |
| Roseacre Developments (Montrose) Ltd | Construction | 2012 |
| Roseacre Lettings Ltd | Real estate | 2022 |
| Roseallochy Ltd | Professional & scientific | 2025 |
| Rosevine Properties Ltd | Real estate | 2014 |
| Rosie Hall Psychology Ltd | Health & social care | 2022 |
| Ross Agri Services Limited | Manufacturing | 1994 |
| Ross Design Solutions Ltd | Manufacturing | 2013 |
| Ross Well Services Ltd | Mining & quarrying | 2023 |
| Rossie Young People's Trust | Other services | 1995 |
| Roundhouse Architecture Ltd | Professional & scientific | 2003 |
| Roy's Auto Repairs Limited | Wholesale & retail | 2003 |
| Royal Burgh of Inverbervie Community Caravan Park Ltd. | Administrative & support | 2005 |
| Royal Montrose Mercantile Golf Club Limited | Arts & recreation | 2019 |
| RRC Completions Ltd | Mining & quarrying | 2019 |
| RRR Holdings Limited | Financial services | 2018 |
| RS Auto (Montrose) Ltd | Wholesale & retail | 2019 |
| RS Petroleum Engineering Ltd | Mining & quarrying | 2005 |