The oldest architectural and engineering activities; technical testing and analysis companies in the UK

Active companies only, by incorporation date on the register.

1. West Yorkshire Society Of Architects

incorporated 1885-11-14
2. Johnson Matthey Plc

incorporated 1891-04-11
3. Zepf Technologies Uk Limited

incorporated 1894-12-21
4. Bells Power Solutions Ltd

incorporated 1905-09-27
5. Tilley International Limited

incorporated 1909-11-12
6. Christie & Grey Limited

incorporated 1914-10-22
7. Keighley Laboratories,limited

incorporated 1920-03-04
8. Keighley Laboratories,limited

incorporated 1920-03-04
9. West Of Scotland Engineering, Motor And Welding Company, Limited

incorporated 1920-05-25
10. Gilbert Gilkes & Gordon Limited

incorporated 1921-03-18
11. Royal Society Of Ulster Architects.

incorporated 1923-02-06
12. C.j.chapman Limited

incorporated 1923-05-30
13. Cleveland Scientific Institution

incorporated 1923-07-02
14. Dewynters Limited

incorporated 1924-04-30
15. Ricardo Limited

incorporated 1927-06-30

More: the oldest companies in the UK, nationally and by every industry and area. Free to cite with attribution.