The chairman and chief executive of P2P Transport have left abruptly after a hefty profit downgrade at a company that had positioned itself as a beneficiary of rapid growth in ride-sharing services by industry giants such as Uber.

P2P listed on the Australian Securities Exchange in late 2017 with an issue price of $1.32, but has been a big disappointment, with the stock now 72 per cent below that level at 37¢.