Polaris is looking to specialist insurers to join the e-commerce platform Imarket.
It said it was in "advanced talks" with a "good number" of insurers.
Peter Knowles, strategy and marketing director at Polaris, said: "We are tending to talk with the more specialist insurers, including D&O and professional indemnity."
This week it was announced that Brit Insurance has become the 13th insurer to join the trading platform. Brit will add directors' and officers', professional indemnity and fleet products to the platform this year
This news comes just weeks after MMA and Fortis announced they would be utilising the service, which now has over 80% of total insurance capacity in terms of gross written premium under its umbrella.
Knowles said future growth in the number of companies joining Imarket would not continue at the rate it has done recently. "It would be unrealistic to expect growth to continue at the current pace," he said.
