Citadel's flagship Wellington multi-strategy fund outperformed the broader hedge fund industry in the first six months of this year, racking up a return of 7.15%, according to a report by Reuters citing an unnamed source with knowledge of the matter.

The fund was up by 0.95% in June alone, while the hedge fund industry on average managed a gain of just 0.63% in the first half of the year, according to figures from hedge fund data provider HFR. 

Other Citadel funds chalked up H1 gains too, according to Reuters' source, with the Citadel Tactical Trading fund seeing a 2.07% gain last month to take YTD returns to 9.36% since January, and the firm's Global Equities fund up 8.43% YTD following a 1.03% gain in June. Citadel's Global Fixed Income fund meanwhile, put on 1.38% last month and is now up 4.39% since the start of the year.