Abchurch is to deal with financial PR and investor relations for Quantum, which supplies drugs to 6,500 pharmacies and more than 240 hospitals accounts across the UK. The group has raised £106.1m, giving it a market capitalisation of £125m.
Abchurch said Quantum Pharma, which is due to float on AIM on 11 December, would be its 80th client that it has represented through an IPO.
Julian Bosdet, CEO of Abchurch, said: "Quantum will be the largest AIM IPO in the pharmaceutical sector this year and we are delighted to be working alongside [nominated adviser] Zeus Capital and other leading advisers on such a substantial listing.
"The team is delighted to work alongside Quantum to position the group as a novel and innovative player in this exciting space. We look forward to working with the company and its advisers going forward."