| Company | Timeline | Status | |
| Halma Investment Holdings Limited Director • Director | 19 May 2004←9 Months→28 Feb 2005 | Active | |
| Halma Financing Limited Director • Director | 14 May 2004←9 Months→28 Feb 2005 | Active | |
| Halton Barns Management Company Limited Director • Director | 19 Sep 1996←24 Years→4 Feb 2021 | Active | |
| Halma International Limited Director • Company Director | 24 Jan 1996←9 Years→28 Feb 2005 | Active | |
| Telegan Gas Monitoring Limited Director • Director | 6 Apr 1994←5 Months→1 Oct 1994 | Dissolved | |
| Crowcon Detection Instruments Limited Director • Director | 6 Apr 1994←5 Months→1 Oct 1994 | Active | |
| Analytical Development Company Limited Director • Company Director | 15 Aug 1992←2 Years 1 Month→1 Oct 1994 | Dissolved | |
| Apollo Fire Detectors Limited Director • Chairman | 1 May 1992←8 Years→28 Jun 2000 | Active | |
| Halma Public Limited Company Director • Company Director | 15 Aug 1991←13 Years→28 Feb 2005 | Active | |
