- Fabtronic Group - Northampton
- Falcon International Bags - Northampton
- Fast Tech Supplies Ltd - Northampton
- FFP Packaging Solutions Ltd - Northampton
- FG Library Products LTD - Northampton
- Fibrelec Ltd - Northampton
- Filtration Control - Northampton
- Fire X UK - Northampton
- First Impression Training Ltd - Northampton
- FlexiSpot - Northampton
- Foilit - Northampton
- Freefoam - Northampton
- Full Metal Software - Northampton
- FUNKE UK - Northampton
- Fuse Collaboration Services - Northampton
- Garden Machines Northampton Ltd - Northampton
- Gavin WillisCreative Marketing - Northampton
- GB Interiors - Northampton
- Geismar - Northampton
- George James Business Systems Ltd - Northampton
- Gilt Edged Promotions - Northampton
- Glass Northampton Ltd - Northampton
- Gloverall Plc - Northampton
- Goodsons Electrical - Northampton
- Gourmet Pidy - Northampton
- GPS Perimeter Systems - Northampton
- Grafton Northampton Ltd - Northampton
- Haddonstone - Northampton
- Hako Machines Ltd - Northampton
- Harting Ltd - Northampton
- Heat Treatments Northampton Ltd - Northampton
- Heritage Guild Windows - Northampton
- Herongrange - Northampton
- Hewlett & Sons - Northampton
- High Voltage Systems Ltd - Northampton
- Hillside a D R Engineering Ltd - Northampton
- Hunter Douglas - Northampton
- Icam Archive Systems Ltd - Northampton
- ICEtags - Northampton
- ICS Security - Northampton
- ID Card Centre Ltd - Northampton
- Igus - Northampton
- Ilmor Engineering, Ltd - Northampton
- InfraRed Integrated Systems Ltd - Northampton
- Intamac Systems Ltd - Northampton
- Intouch Monitoring - Northampton
- Irisys - Northampton
- J C S Computing - Northampton
- James Hogg Display - Northampton
- Johnson & Starley - Northampton
Companies 101 to 150
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