| AIR PRODUCTS PUBLIC LIMITED COMPANY | Chemicals | 1909 | Full accounts |
| STANHOPE-SETA LIMITED | Computers, electronics and optics | 1940 | Full accounts |
| AIR PRODUCTS LLANWERN LIMITED | Chemicals | 1974 | Full accounts |
| TECHTRON LIMITED | Chemicals | 1980 | Audit-exempt subsidiary |
| CONVAC LIMITED | Other manufacturing | 1982 | Total exemption (full) |
| AIR PRODUCTS (BR) LIMITED | Chemicals | 1990 | Full accounts |
| MACEY CONTROLS LIMITED | Computers, electronics and optics | 1992 | Total exemption (full) |
| SAMSUNG ELECTRONICS (UK) LIMITED | Computers, electronics and optics | 1995 | Full accounts |
| PATTERSON PRODUCTS LIMITED | Machinery and equipment | 2002 | Unaudited abridged |
| CARGOFIN LIMITED | Repair and installation of machinery | 2003 | Total exemption (full) |
| VERSAN LIMITED | Repair and installation of machinery | 2003 | Total exemption (full) |
| IN2 PLASTICS LIMITED | Rubber and plastics | 2004 | Total exemption (full) |
| CLASS ONE TRUCK REPAIRS LIMITED | Repair and installation of machinery | 2009 | Unaudited abridged |