Some of the companies represented by Mackinnons together with its associate company Volkart Pakistan were:
- OCL / P&O Containers
- Nedlloyd Line / P&O Nedlloyd
- Maersk Line
- Hoegh Line
- Kuwait Petroleum
- Tokyo Marine
- Stolt Nielsen
- Internal Tanker Management, UAE
- Commerint Bulk Carriers (Vancouver)
- Australian National Line
- Scotish Shipmanagement
- Van Ommersen
Above to name a few, and numerous tramp vessels.
All of these Principals had the satisfaction of being represented by the best in the country.