The deal values Wood Mackenzie at £1.1bn and leaves UK firm Charterhouse with a 13 per cent stake in the company it bought outright for £552m in 2009.
H&F will receive a 63 per cent stake in the company, while the company’s management will hold a 24 per cent stake.
Charterhouse kicked off the sale process earlier this year by hiring Quayle Munro to conduct a strategic review of the company after receiving interest from US trade buyers.
At the time the sale was expected to fetch between ten and 14 times EBITDA for 2012, valuing the company at between £800m and £1.1bn.
Wood Mackenzie is projected to make EBITDA of about £88m this year and £100m in 2013.
The deal is backed by about £550m of debt led by Nomura and consisting of senior leveraged loans and mezzanine loans be provided by MezzVest, Noonday and Sankaty, according to Reuters.
The firm made its name in the 1970s when it started reviewing the North Sea oilfields, and soon evolved to become a global analyst for the energy industry.
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