Billionaire Preqin Seller’s Family Office Builds Buyout Firm Bet

Preqin founder Mark O’Hare’s family office is increasing its bet on buyout firm Hg, shaping the British entrepreneur’s next act after BlackRock Inc. bought his private-capital data provider in one of the UK’s biggest takeovers last year.

O’Hare and his family’s investment firm, Valhalla Ventures, has repeatedly acquired shares in a publicly traded trust for the tech-focused buyout company, leaving it with a holding worth about $200 million, according to regulatory filings.

Valhalla now controls 7.2% of HgCapital Trust Plc after disclosing its latest stock purchase in the London-listed vehicle on Thursday, adding to four other acquisitions since first ...