High-profile hedge funds still circling Tullow Oil, as debt-laden explorer mounts fightback Submitted By Hugh Leask | 23/02/2021 - 2:22pm A number of well-known hedge fund short sellers continue to target London-listed oil and gas company Tullow Oil, as the beleaguered exploration firm looks to overhaul its business model and improve its balance sheet position. Pictet Asset Management, the investment management and hedge fund arm of wealth management giant Pictet Group, grew its short position in the FTSE250 name from 1.47 per cent to 1.55 per cent this week.