| 4c Engineering | UK  | Consultancy Company/Engineering Company | 
| Aberdeen International Associates | UK | Consultancy Company/Engineering Company | 
| A C Marine & Composites | UK | Supply Chain Company | 
| Aiken Global | UK | Offshore Renewable Energy Technology or Project Developer | 
| Albatern Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| Alicat Scientific | UK | Scientific technologies manufacturer
 | 
| Allerton Steel  | UK | Supply Chain Company | 
| AMOG | UK | Consultancy Company/Engineering Company | 
| Applied Renewables Research Ltd | UK  | Consultancy Company/Engineering Company | 
| Apollo | UK | Consultancy Company/Engineering Company | 
| Aqualis-Braemar | UK  | Consultancy Company/Engineering Company | 
| Ashell | UK | Consultancy Company/Engineering Company | 
| Aubin | UK  | Supply Chain Company | 
| B15 Marine Ltd | UK  | Supply Chain Company | 
| Balancing Rocks Limited | UK | Consultancy Company/Engineering Company | 
| BayWa r.e. | UK  | Other | 
| BD Consultancy | UK  | Consultancy Company/Engineering Company | 
| Black & Veatch | UK  | Consultancy Company/Engineering Company | 
| Blackfish Engineering Design | UK | Consultancy Company/Engineering Company | 
| Booth Welsh Automation Ltd | UK  | Consultancy Company/Engineering Company | 
| BPP Cable Solutions | UK  | Consultancy Company/Engineering Company | 
| Bremeton | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Briggs Marine Contractors | UK  | Supply Chain Company  | 
| Burntisland Fabrications Ltd | UK  | Supply Chain Company  | 
| BVG Associates | UK  | Consultancy Company/Engineering Company | 
| Cadpeople UK Ltd | UK | Supply Chain Company | 
| Cairnhill Structures | UK | Consultancy Company/Engineering Company | 
| Caley Ocean Systems | UK  | Supply Chain Company  | 
| Cape Horn Engineering | UK | Consultancy Company/Engineering Company | 
| Cedeco Contractors Ltd | UK | Other | 
| Cefas | UK | Academic Institute/Research Performing Organisation  | 
| Centipod | UK | Offshore Renewable Energy Technology or Project Developer | 
| Cierco | UK | Offshore Renewable Energy Technology or Project Developer | 
| Cimpina Ltd | UK | Supply Chain Company  | 
| Climate & Carbon Change Matters | UK | Consultancy Company/Engineering Company | 
| Composite Integration Ltd | UK | Supply Chain Company  | 
| CPower Alba  | UK | Offshore Renewable Energy Technology or Project Developer | 
| Crack Map Ltd | UK | Consultancy Company/Engineering Company | 
| CSignum | UK | Supply Chain Company  | 
| Denholm Industrial Services Ltd
 | UK | Construction | 
| Ecosse IP Ltd | UK  | Offshore Renewable Energy Technology or Project Developer | 
| EnergyVue | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| Energy SRS Ltd | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| Escape Recruitment Services Ltd | UK | Business Support organisation | 
| European Marine Energy Centre | UK | Academic Institute/Research Performing Organisation  | 
| European Springs and Pressings | UK | Supply Chain Company | 
| Feritech Global Ltd | UK | Supply Chain Company  | 
| Firestalk Ltd | UK | Business Support organisation
 | 
| Floating Energy Systems Ltd
 | UK | Consultancy Company/Engineering Company
 | 
| Focus Offshore | UK | Consultancy Company/Engineering Company | 
| Forde Engineering Ltd  | UK  | Consultancy Company/Engineering Company | 
| Freudenberg Oil & Gas Technologies | UK | Supply Chain Company | 
| Frontier Technical Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| Genspira | UK | Offshore Renewable Energy Technology or Project Developer | 
| Gilmorehill | UK | Offshore Renewable Energy Technology or Project Developer | 
| Global Maritime | UK  | Consultancy Company/Engineering Company | 
| Global OTEC Resources Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| GMC Limited | UK | Consultancy Company/Engineering Company | 
| The Green Drive Assembly Company | UK | Offshore Renewable Energy Technology or Project Developer | 
| Hexagon Manufacturing Intelligence
 | UK | Supply Chain Company
 | 
| Heriot-Watt University | UK  | Public Sector Organisation  | 
| Howell Marine Consulting | UK | Consultancy Company | 
| Hydrowing Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| Hydro Developments Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| Hydropower International Ltd
 | UK | Offshore Renewable Energy Technology or Project Developer   | 
| Imetrum | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Industrial Systems and Control Ltd | UK | Consultancy Company/Engineering Company | 
| Infinities Global Limited | UK | Offshore Renewable Energy Technology or Project Developer | 
| Innovate UK | UK | Public Sector Organisation | 
| Innvotek | UK | Supply Chain Company | 
| Integrated Project Controls Management | UK | Consultancy Company/Engineering Company | 
| InterMoor | UK | Supply Chain Company | 
| Intertek | UK | Consultancy Company/Engineering Company | 
| Inventta | UK | Consultancy Company/Engineering Company | 
| Invest NI | UK | Business Support organisation | 
| Inyanga Tech | UK | Supply Chain Company | 
| KG Energy
 | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| ITPEnergised | UK | Consultancy Company/Engineering Company | 
| Liberty House Group | UK | Supply Chain Company | 
| Linellgroup | UK | Offshore Renewable Energy Technology or Project Developer | 
| Linxon | UK  | Supply Chain Company  | 
| Lloyd's Register EMEA | UK | Other | 
| London Marine Consultants Ltd | UK | Consultancy Company/Engineering Company | 
| Macintyre Chocolate Systems  | UK  | Supply Chain Company  | 
| Mage Control Systems Ltd | UK  | Supply Chain Company  | 
| Major Engineering | UK | Consultancy Company/Engineering Company | 
| Marine Energy Wales | UK  | Other | 
| Marine Power Systems | UK  | Offshore Renewable Energy Technology or Project Developer | 
| MarineSpace | UK | Consultancy Company/Engineering Company | 
| Market Potential Ltd | UK  | Consultancy Company/Engineering Company | 
| Maverick Aviation | UK | Offshore Renewable Energy Technology or Project Developer | 
| McLaughlin & Harvey | UK  | Supply Chain Company  | 
| Mocean Energy | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Monitor Systems Scotland Ltd | UK | Supply Chain Company  | 
| Morek Engineering | UK | Consultancy Company/Engineering Company | 
| Naiad Infrastructure | UK | Consultancy Company/Engineering Company | 
| Nautricity Ltd | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Nova Innovation Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| Ocean Energy & Resource Limited | UK | Supply Chain Company | 
| Ocean Energy Systems Limited | UK | Consultancy Company/Engineering Company | 
| Ocean Wave Technologies Limited | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| Offspring International Ltd | UK | Supply Chain Company | 
| Olwg | UK | Consultancy Company/Engineering Company | 
| One Hundred Flowers | UK | Offshore Renewable Energy Technology or Project Developer | 
| Orbital Marine Power Limited | UK  | Offshore Renewable Energy Technology or Project Developer | 
| OSBIT Limited | UK | Supply Chain Company | 
| Paper Yacht Limited | UK  | Consultancy Company/Engineering Company | 
| Pathfinder Renewables Ltd | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| Peter Child Associates Ltd | UK | Consultancy Company/Engineering Company | 
| Petrofac  | UK  | Consultancy Company/Engineering Company | 
| Planet A Solutions CIC | UK | Consultancy Company/Engineering Company | 
| Pict Offshore Ltd | UK | Supply Chain Company | 
| ProKinetics Ltd | UK | Offshore Renewable Energy Technology or Project Developer | 
| Propeller Driven Turbines Ltd | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| Pure Energy Professionals | UK | Consultancy Company/Engineering Company | 
| Pure Management | UK | Offshore Renewable Energy Technology or Project Developer | 
| QED Naval Limited | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Quoceant | UK | Consultancy Company/Engineering Company | 
| Recharged | UK  | Other  | 
| Renewable Dynamics Limited | UK | Consultancy Company/Engineering Company | 
| Renewable Risk Advisers | UK  | Consultancy Company/Engineering Company | 
| RINA Consulting | UK | Consultancy Company/Engineering Company | 
| RPS | UK  | Consultancy Company/Engineering Company | 
| RSK | UK | Consultancy Company/Engineering Company
 | 
| Santane Ltd | UK  | Consultancy Company/Engineering Company | 
| Satsense Solutions  | UK | Other | 
| Scientific Management International | UK | Consultancy Company/Engineering Company | 
| Scotstream Generation Limited | UK | Offshore Renewable Energy Technology or Project Developer | 
| Sea Source Offshore  | UK | Other | 
| Seamach Energy | UK | Offshore Renewable Energy Technology or Project Developer | 
| Sealand Projects  | UK  | Consultancy Company/Engineering Company | 
| Sea Wave Forward | UK | Offshore Renewable Energy Technology or Project Developer | 
| Seawild Ltd | UK | Other | 
| Siemens Energy | UK | Supply Chain Company  | 
| Sinclair Energy Partners | UK | Offshore Renewable Energy Technology or Project Developer | 
| Skua Marine | UK  | Consultancy Company/Engineering Company | 
| Smart Component Technologies Ltd | UK | Other | 
| Stòras Uibhist | UK | Other | 
| Subsea UK | UK | Business Support organisation | 
| Subsea Hydropower | UK | Offshore Renewable Energy Technology or Project Developer | 
| SuperVAWT Ltd
 | UK | Offshore Renewable Energy Technology or Project Developer
 | 
| Supply Design Ltd | UK  | Supply Chain Company  | 
| The University of Edinburgh, Policy and Innovation Group | UK  | Academic Institute/Research Performing Organisation  | 
| TSG Marine | UK | Consultancy Company/Engineering Company | 
| TTI Marine Renewables  | UK | Consultancy Company/Engineering Company | 
| Turbulent simulations Ltd | UK | Consultancy Company/Engineering Company | 
| TWEFDA Ltd | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Uaine Gorm Power Associates | UK | Consultancy Company/Engineering Company | 
| UHI | UK  | Academic Institute/Research Performing Organisation  | 
| UK Hydrographic Office | UK | Public Sector Organisation | 
| Ulster University | UK  | Academic Institute/Research Performing Organisation  | 
| UltraMAP Limited | UK | Other | 
| University of Exeter | UK  | Academic Institute/Research Performing Organisation | 
| University of Plymouth | UK | Academic Institute/Research Performing Organisation | 
| Unmanned Survey Solutions | UK | Supply Chain Company | 
| Vectis Sustainable Engineering | UK | Consultancy Company/Engineering Company | 
| Verdant Power UK | UK | Offshore Renewable Energy Technology or Project Developer | 
| VerdErg Renewable Energy | UK | Offshore Renewable Energy Technology or Project Developer | 
| Verlume | UK | Offshore Renewable Energy Technology Developer
 | 
| VG technologies | UK | Consultancy Company/Engineering Company
 | 
| Walker Subsea Engineering | UK | Offshore Renewable Energy Technology or Project Developer | 
| Waves 4 Power UK lTD | UK | Offshore Renewable Energy Technology or Project Developer | 
| WFS Technology | UK  | Supply Chain Company  | 
| White Horse Energy | UK | Offshore Renewable Energy Technology or Project Developer | 
| William Johnston & Company Limited | UK  | Supply Chain Company | 
| Windhoist | UK  | Supply Chain Company  | 
| WITT (Energy) Limited | UK  | Offshore Renewable Energy Technology or Project Developer | 
| Woollard and Henry | UK | Supply Chain Company | 
| Xi Engineering consultants | UK  | Consultancy Company/Engineering Company  | 
| Xodus Group | UK  | Consultancy Company/Engineering Company | 
| ZOEX Power Ltd | UK | Offshore Renewable Energy Technology or Project Developer |