| Pitt Financial Services Ltd | Professional & scientific | 2022 |
| Plexus Freight Ltd | Transport & logistics | 1996 |
| Pliosaur Energy Ltd | Energy | 2012 |
| PMH Portishead Management Limited | Real estate | 2006 |
| Portisbiz Ltd | Real estate | 2019 |
| Portishead Barber Company Limited | Other services | 2018 |
| Portishead Chiropractic Clinic Ltd | Health & social care | 2002 |
| Portishead Cricket Club Limited | Arts & recreation | 2024 |
| Portishead Insurance Services Ltd | Financial services | 2013 |
| Portishead Sea School Ltd | Education | 2021 |
| Portishead Waste Clearance Ltd | Water & waste | 2023 |
| Portishead Youth & Community Centre Limited | Education | 2011 |
| Premier Financial Direction Limited | Professional & scientific | 2002 |
| Premium Homewares Ltd | Wholesale & retail | 2016 |
| Prestige Chameleon International Ltd | Arts & recreation | 2023 |
| Prestige Pantomimes Ltd | Extraterritorial | 2024 |
| Prestige Productions Ltd | Arts & recreation | 2012 |
| Problem Free Limited | Information & communication | 2002 |
| Production Bloc Ltd | Administrative & support | 2023 |
| Proforms 6230 Limited | Administrative & support | 2004 |
| Pudding Lane Developments Limited | Real estate | 2013 |
| Purdy Court (Fishponds) RTM Company Limited | Real estate | 2008 |
| Rare Futures Limited | Information & communication | 2002 |
| Red Cameleon Limited | Professional & scientific | 2013 |
| Red Chilliz Ltd | Hospitality | 2023 |
| Redland Tree Services Limited | Agriculture & fishing | 2021 |
| Redleaf AV Ltd | Arts & recreation | 2015 |
| Regent Court RTM Company Limited | Households | 2011 |
| Rencel Procurements Limited | Professional & scientific | 2015 |
| Renewable Electrical Communications Ltd | Construction | 2019 |
| Responsible Business Assessment Limited | Professional & scientific | 2020 |
| RJP Financial Ltd | Professional & scientific | 2009 |
| Robert Taylor Ltd | Transport & logistics | 2011 |
| Robin Harvey Bespoke Carpentry Limited | Construction | 2013 |
| Sabura Projects Ltd | Administrative & support | 2013 |
| Sand and Surf Lettings Limited | Real estate | 2021 |
| Sapphire Finance Ltd | Professional & scientific | 2019 |
| Seahorse Construction Ltd | Construction | 2020 |
| Sealant Distribution Limited | Construction | 2002 |
| Searock Portishead Ltd | Hospitality | 2019 |
| Second Mesh Limited | Information & communication | 2025 |
| Severnsoft Limited | Information & communication | 1984 |
| Shorelight Education UK PVT. Ltd. | Education | 2018 |
| Signal IT Ltd | Information & communication | 2018 |
| Signal Network Solutions Ltd | Information & communication | 2015 |
| Signal Networks (Holding) Limited | Professional & scientific | 2024 |
| Signal Networks Limited | Information & communication | 2000 |
| Simplisys Limited | Information & communication | 2006 |
| SK8 OR DIE Ltd | Wholesale & retail | 2018 |
| Skreen Financial Services Limited | Financial services | 2019 |
| Smartix Ltd | Information & communication | 2024 |
| Soft Target Protection Systems Limited | Manufacturing | 2020 |
| Songbird Solutions Limited | Information & communication | 1998 |
| South West Mortgage Shop Limited | Financial services | 2014 |
| Sparks Property Services Limited | Construction | 2010 |
| ST Anne's Wharf Limited | Real estate | 2010 |
| Stressless Solutions Limited | Other services | 2022 |
| Stuart Key Photography Limited | Professional & scientific | 2017 |
| SUE Sadler Properties Ltd | Real estate | 2023 |
| Survey My Building Limited | Professional & scientific | 2011 |
| Suzy Ltd | Other services | 2002 |
| T C Productions Ltd | Arts & recreation | 2019 |
| Tech Squad Ltd | Manufacturing | 2011 |
| Teddytails Plumbing Ltd | Construction | 2025 |
| Tenderwin Limited | Professional & scientific | 2012 |
| Ternio Consulting Limited | Administrative & support | 2024 |
| Textawish Limited | Extraterritorial | 2009 |
| TH61 Limited | Professional & scientific | 2025 |
| THE 1:1 Diet With JO COX Ltd | Health & social care | 2019 |
| THE Assessors Club Limited | Extraterritorial | 2011 |
| THE Avon and Somerset Constabulary Benevolent Fund | Other services | 1999 |
| THE Channel Partnership (Holdings) Ltd | Financial services | 2017 |
| THE Funktion Room Limited | Wholesale & retail | 2006 |
| THE Hillside Road Beach Company Limited | Professional & scientific | 2025 |
| THE LDA (South West) Limited | Administrative & support | 2024 |
| THE Portishead Lifeboat Trust | Transport & logistics | 1995 |
| Third Option Limited | Professional & scientific | 2023 |
| Threesixtyfive Ltd | Information & communication | 2018 |
| TLA Portishead Ltd | Professional & scientific | 2008 |
| Top Dog Wash Limited | Other services | 2026 |
| Totol Cleaning Services Limited | Administrative & support | 2020 |
| Transvault Software Limited | Information & communication | 2008 |
| Treasure Renovations Ltd | Construction | 2013 |
| Turner Consulting (Bristol) Limited | Professional & scientific | 2018 |
| Twobones Ltd | Manufacturing | 2018 |
| Umbar Ltd | Wholesale & retail | 2022 |
| Unified-Response Limited | Information & communication | 2014 |
| Unit Services United K Ltd | Administrative & support | 2020 |
| Upward Spiral 1446 Limited | Professional & scientific | 2024 |
| Urfan Consulting Ltd | Information & communication | 2016 |
| Valiant Engineering Ltd | Information & communication | 2019 |
| Vietnamese Street Food Ventures Limited | Hospitality | 2021 |
| Viper Innovations Ltd | Professional & scientific | 2007 |
| Vr&B Engineering Limited | Professional & scientific | 2024 |
| Wada Foodtech UK Limited | Hospitality | 2026 |
| Warmup and Stretch Limited | Education | 2004 |
| Westgrace Homes Limited | Construction | 2018 |
| Weta Consultancy Limited | Information & communication | 2009 |
| Whiterock Consultancy Ltd | Professional & scientific | 2019 |
| Whitten & Co UK Ltd | Professional & scientific | 2017 |