Alken is to soft close Nicolas Walewski's €2 billion (£1.65bn) Alken Absolute Return Europe fund to protect existing investors.
The group said the move was due to significant recent inflows and that the fund would be officially soft closed on Wednesday 19 March.
Existing shareholders will have subscriptions limited to €500,000 per nominee account per day, it added.
Sales director Alisdair Bell said: 'The team at Alken are committed to sustainable and controllable growth of our funds. This is for the protection of our investors as well as the performance of our funds.'
Since inception of the fund on 31 January 2011 to the end of February 2014, the fund has returned 33.8% versus a fall of 4.77% by the HFRX Equity Hedge Index.