Aguiar concentrated at healthcare deals at Avista, and is set to leave to explore new opportunities in the European healthcare market according to Dow Jones, which cited two people familiar with the matter.
He was previously a partner at DLJ Merchant Banking Partners and European buyout house Triton, before joining Avista to head up its new London office in 2010.
The firm made the move despite a shift in UK tax policy at the time, which saw the capital gains rate jump from 18 per cent to 28 per cent to help address the deficit.
Avista, which was founded in 2005, targets healthcare, energy and media companies.
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