Listed below are some of the companies that Thompson Clive is or has been involved:
| Unquoted Companies | Quoted Companies |
| Aenix Informatique SA | Acal plc |
| Aspective Ltd | ACT plc |
| Carisfield Ltd | Advanced Technology (UK) plc |
| Chattanooga Group Inc | Alpha-MOS SA |
| Com'X SA | Bioquell plc |
| Data Conversion Systems Ltd | Borland International Inc |
| Davin Group Ltd | British Biotech plc |
| DynEd International Inc | Cider Santé SA |
| Ealing Catalog Inc | DPCE Holdings plc |
| Emerald City Software Inc | Esker SA |
| Enterprise Systems Group Ltd | Encore Medical Corporation |
| Envoy Systems Inc | Financial Objects plc |
| Eon Systems Inc | Goldshield Group plc |
| Frontwire Ltd | Holliday Chemical Holdings plc |
| Genitope Corporation | Infotel SA |
| Geoconference Ltd | International Colour Management plc |
| GFI Group Inc | Isotron plc |
| Heritable Group plc | Micrelec Group plc |
| Homecraft Holdings Ltd | Misys plc |
| ImageCom Ltd | NetManage Inc |
| Integral Systems Inc | NETTEC plc |
| Integrated Sales Systems Ltd | Parexel International Corporation |
| inventure.com | Persistence Software Inc |
| Inverse Network Technology | Quintiles Transnational Corporation |
| Iprogress SA | Stedim SA |
| Istel Group Ltd | The Terence Chapman Group plc |
| Life Support Products Inc | Visual Networks Inc |
| Mantix Systems Ltd | Walker Interactive Systems Inc |
| Medicom International Ltd | William Demant Holding A/S |
| Medicom International Inc | |
| Negretti Holdings plc | |
| N-Soft SA | |
| PPS Europe Ltd | |
| Phonic Ear Holdings Inc | |
| Ponte Communications Inc | |
| Powerquest Corporation | |
| Reedpack Ltd | |
| Roster Control Systems Ltd | |
| Sifam Instruments Ltd | |
| Sifam Ltd | |
| Telespree Communications Inc | |
| TriVirix International Inc | |
| Universal Health Care plc |