Before the public offer, BlackRock and Janus Henderson had committed to take $510 million worth of shares.
The company, led by Tony Pialis (pictured) had targeted a valuation of £3.1 billion but achieved £2.23 billion at the IPO.
Nonetheless, Alphawave was able to raise £856 million from the offer.
Before the IPO it was stated that the company intended to move its HQ to London.
