Man Group has completed its purchase of GLG Partners, creating a diversified fund group running $63bn of assets.
Following completion of the takeover, GLG is now a wholly owned subsidiary of Man.
Peter Clarke, Man's chief executive, says: "The acquisition is a significant milestone in Man's development.
"Investors are now able to gain access to managed futures, equity, credit, emerging markets, global macro, across single manager funds, managed accounts, multi-manager portfolios and structured products."
Clarke's rationale for the takeover of GLG - to complement Man's flagship quantitative fund AHL with GLG's discretionary management skills - has been vindicated this year as Man's shares have moved in line with the performance of AHL.
Morgan Stanley calculates Man relies on AHL alone for about three-quarters of its profits.
In July analysts at Keefe, Bruyette & Woods gave Man's shares an "underperform" rating based partly on concerns over AHL's performance.
Yesterday Man jumped 4.7% on news AHL had returned 4.5% in a week and was within 2% of the threshold at which it could collect lucrative performance fees.
Sales head departs after eight years
Near-term volatility expected
Fund to offer diversification benefits
Staff blog addresses growing concerns
Market declines just a 'knee-jerk reaction'