Permira, the UK buyout group, has offered investors the opportunity to increase their commitments to its latest fund, to cover the reductions made after 18 investors took up an offer to scale back their interests in return for lower profits.

18 of Permira's investors, which is about 10% of the total, chose to cut their commitments to Permira's fourth fund reducing it 13% from €11.1bn ($16.2bn) to €9.6bn in size.