Company Index
- NALCO Ltd - Aberdeen
- NALCO Ltd - Doncaster
- NALCO Ltd - Southampton
- Namrom SCUBA - Rotherham
- National Hyperbaric Centre Ltd - Aberdeen
- National Oilwell UK Ltd - Aberdeen
- National Oilwell Varco UK Ltd - Aberdeen
- National Physical Laboratory (NPL) - Teddington
- National Starch and Chemical Ltd - Goole
- Natrelle Ltd - London
- Nayler Chemicals Ltd - Wigan
- NBS Biologicals Ltd - Huntingdon
- Neptune Oceanographics - Chipping Norton
- Neptune Sonar Ltd - Driffield
- NERO Pipeline Connections Ltd - Oldbury
- Nessco Ltd - Aberdeen
- Net Tex Agricutural Ltd - Gravesend
- NetMC Marine Ltd - Turriff
- Neutra-Rust International Ltd - Staines
- New Era Oil - London
- New Guard Coatings Ltd - Wetherby
- New Metals and Chemicals Ltd - Waltham Abbey
- New Tech Lubes - Worksop
- New Technology Lubricants Ltd - Stoke on Trent
- Newcastle Mining Ltd - Lanark
- Newgate Simms Ltd - Chester
- Newpak Products - Newcastle under Lyme
- NGK Berylco (UK) Ltd - Salford
- NICC Ltd - Blairgowrie
- Nichem Ltd - Ballynahinch
- Nielsen Chemicals - Swadlincote
- Nigel Press Associates - Edenbridge
- Nikon UK Ltd (Industrial Instruments Division) - Kingston upon Thames
- NIM Engineering Ltd - Newcastle upon Tyne
- Nippon Gohsei Ltd - Hull
- Nippon Oil Exploration UK Ltd - London
- Nippon Oil Exploration&Production Ltd - London
- Nixon Flowmeters Ltd - Cheltenham
- NMC (UK) Ltd - Tredegar
- Noble Denton Consultants Ltd - London
- Noble Drilling (UK) Ltd - Aberdeen
- Noble Energy (Europe) Ltd - Sevenoaks
- Noble Fuels - Guisborough
- Nomix Enviro - Bristol
- Non-Destructive Inspection Services Ltd - Witney
- Norbar Torque Tools Ltd - Banbury
- Norbrook Laboratories Ltd - Newry
- Norcon (Norris) Ltd - Haywards Heath
- Norgine Ltd - Pontypridd
- Norit UK Ltd - Glasgow
- Norkem Ltd - Knutsford
- Norse Ltd - Aberdeen
- Norsk Hydro (UK) Ltd - Twickenham
- Norson Services Ltd - Aberdeen
- North East Chemicals Ltd - Gateshead
- North East Labgear - Peterlee
- North East Rigout Ltd - Aberdeen
- North Offshore Ltd - Aberdeen
- North Sea Appraisals - Peterhead
- North Sea Lifting Ltd - Aberdeen
- Northants Leather Chemicals Ltd - Northampton
- Northern Ireland Oil Federation - Newtownards
- Northern Offshore Federation - Washington
- Northern Plastics - Elland
- Northland - Barnsley
- Northrop Grumman Sperry Marine - New Malden
- Norver Paints Ltd - Liversedge
- Noskab Group plc - Aberdeen
- Nova Hydraulics Ltd - Aberdeen
- Novartis Crop Protection UK Ltd / Novartis Seeds Ltd / Syngenta - Cambridge
- Nowcasting International - Ennis
- NRG Developments Ltd - Chorley
- NTCDucting com Ltd - Swansea
- Nufarm UK Ltd - Belvedere
- Nufins - Washington
- Nynas Naphthenics Ltd - Warrington
