Eurotunnel is seeking £29 million in compensation for the Calais migrant chaos last summer.
The cross channel rail operator wants a settlement from both the UK and French governments – £26 million in lost revenues and £3 million in additional costs.
The operator said it was forced to cancel services as migrants repeatedly stormed the tunnel, and claims both governments failed to act quickly enough to strengthen borders.
It argues that border control and public order is the responsibility of the states, while the company is only responsible for running an efficient service.
Borders were eventually tightened at Calais and Eurotunnel said the problems stopped.
The plan to seek compensation was revealed as the group announced its 2015 financial results.
The group saw revenues increase by 5% to €1.222 billion and EBITDA rise to €542 million.
Net consolidated profit increased to €100 million
Jacques Gounon, chairman and CEO, said: "In a difficult environment in 2015, the Group worked with the efficiency of a private company to deliver a genuine public service.
“This was achieved through the commitment of its staff, close cooperation with the two governments and an exemplary capacity to react to events."
