| Cloud Grey Studio, Reading Berkshire | Photography studio | 5a The Square | Daily 08:00–22:00 |
| Co-Space Reading | Co-working-fläche | Quadrant House, Broad St | Mon–Thu 08:30–17:00 |
| Coach & Minibus Hire Reading | Coach and minibus hire | Body Rd | Daily 06:00–20:00 |
| Cobbs at Englefield | Farm shop | Wickcroft Farm | Mon–Fri 09:00–18:00 |
| College of Integrated Chinese Medicine | Acupuncture school | 19 Castle St | Mon–Fri 09:00–17:00 |
| Completely Floorless | Gulvsliping og polering service | 43 Chamberlain Gardens | Thu 08:00–18:00 |
| Continental Supreme Rice | Rice wholesaler | Unit 12, Ruscombe Business Park | Mon–Fri 09:00–17:00 |
| Cosy Caffe And Kitchen | Modern British restaurant | 5 Church Rd | Daily 09:00–17:00 |
| Courtman & Co | Hausverwaltungsunternehmen | Reading RG1 9NX | Thu 08:30–16:30 |
| Crayshaw Court - Retirement Living - McCarthy & Stone | Apartmenthaus | Abbotsmead Pl | Mon–Fri 08:00–18:00 |
| Creative Landscape Co Ltd | Landschaftsgestalter | Wargrave Rd | Mon–Fri 07:30–16:30 |
| Crispy Dosa Restaurant | Vegetarisches restaurant | 60 Oxford Rd | Thu 10:00–22:00 |
| Crunch Comics | Comic book shop | 10/11 Harris Arcade | Tue–Sat 10:00–16:00 |
| Crysallis Skin Clinic | Schönheitsklinik | 39 Prospect St | Thu 10:00–19:00 |
| CTS Logistics | Freight forwarding service | Silchester, Reading RG7 2PQ | Mon–Fri 05:00–19:00 |
| D & S Hamilton Ltd | MOT centre | Unit 1, DeepWater Yard, Part Ln | Mon–Fri 08:00–17:00 |
| D&G Brickwork | Bricklayer | 4a Shepard Place | Mon–Tue 08:00–17:00 |
| Darklight Design | Lighting shop | UNIT 10, Brookside Business Centre, Church Rd | Mon–Thu 08:30–17:00 |
| David Bates Architectural Designer | Architectural designer | Sonning Ln | Mon 09:00–17:00 |
| Dead Simple Accounting | Buchhalter | Ste 30, 105 London St | Mon–Fri 09:00–17:00 |
| Deenway Montessori School & Unicity College | Montessori school | 3-5 Sidmouth St | Mon–Fri 08:30–17:30 |
| Dental Implant Centre Twyford | Dental implants provider | 1 Church St | Mon–Tue 09:00–17:30 |
| Dexmah | Building consultant | Dexmah Ltd, 9 Greyfriars Rd | Mon–Fri 09:00–17:00 |
| Dhenda International LTD | Clothing supplier | International, Davidson House, The Forbury Dhenda | Mon–Thu 08:00–17:30 |
| Discovering Herbal Medicine | Herbalist | 366 Wokingham Rd | Tue 08:00–18:00 |
| DJS Industries | Electronics repair shop | Unit 9A Amners Farm Rd | Mon–Sat 10:00–16:00 |
| Doom & Bloom Printing Co | Screen printer | Unit 4a, Paddock Rd | Mon–Fri 09:00–17:00 |
| Douai Abbey | Abbey | Upper Woolhampton, Reading RG7 5TQ | Mon 06:30–20:00 |
| Double-Barrelled Brewery | Brauerei | Unit 20 Stadium Way | Thu 17:00–21:30 |
| Dower House Honey | Honey farm | 10 Curly's Way | Mon–Fri Open 24 hours |