Key Takeaways
- • Chris Foster, senior portfolio manager at Citadel's London office, is departing the hedge fund after his team generated approximately $2 billion in trading profits from European natural gas markets during the 2022 energy crisis triggered by Russia's Ukraine invasion.
- • Foster's $2 billion contribution represented roughly 25% of Citadel's commodities division's $8 billion profit haul in 2022, a performance that helped propel Citadel past Bridgewater Associates to become the most profitable hedge fund of all time.
- • Citadel has since pivoted from pure trading to direct asset ownership, completing a $1 billion acquisition of Paloma Natural Gas assets in the Haynesville Shale in March 2025, rebranded as Apex Natural Gas, establishing operational footprint in U.S. natural gas production.
- • Foster's departure aligns with a fundamental shift in European energy markets, where the extreme price volatility and supply panic of 2022 have normalized as storage levels stabilized and the continent diversified away from Russian pipeline gas.
- • Foster donated £25 million to Mansfield College at Oxford University, marking the largest single donation in the college's approximately 200-year history.
Summary
Chris Foster's departure from Citadel marks the conclusion of one of modern finance's most lucrative crisis-driven trading campaigns. Operating from Citadel's London office, Foster's team capitalized on Russia's curtailment of natural gas flows to Europe following the invasion of Ukraine, positioning aggressively in derivatives markets as prices experienced violent swings. The team's approximately $2 billion in 2022 trading profits represented a quarter of the roughly $8 billion that Citadel's entire commodities division generated that year—a performance milestone that established Ken Griffin's fund as the industry's most profitable vehicle, dethroning Ray Dalio's Bridgewater Associates from a title the latter had held for decades.
The exceptional profitability of Foster's gas trading operations reflected the extraordinary market conditions of 2022. European natural gas markets experienced panic-driven extremes as the continent confronted sudden supply disruptions and faced the urgent task of diversifying away from Russian pipeline dependency. This geopolitical shock created the precise conditions for sophisticated systematic positioning to generate outsized returns. However, those conditions have materially changed. European natural gas markets have calmed considerably, storage levels have stabilized, and the continent has successfully reduced its exposure to Russian gas through diversified supply arrangements and infrastructure investment.
In parallel with Foster's departure, Citadel has executed a strategic transition from pure energy trading toward direct asset ownership and production. The firm completed a $1 billion acquisition of Paloma Natural Gas assets in the Haynesville Shale formation in March 2025, subsequently rebranding the assets as Apex Natural Gas. This acquisition provides Citadel with integrated upstream exposure and direct participation in U.S. natural gas production rather than reliance on market volatility for returns.
Foster's exit was marked by substantial philanthropy. He donated £25 million to Mansfield College at Oxford University, his alma mater, establishing the gift as the largest single donation in the college's approximately 200-year institutional history. His departure reflects both the normalization of energy markets that enabled his extraordinary 2022 performance and Citadel's strategic evolution into direct energy asset ownership.
The exceptional profitability of Foster's gas trading operations reflected the extraordinary market conditions of 2022. European natural gas markets experienced panic-driven extremes as the continent confronted sudden supply disruptions and faced the urgent task of diversifying away from Russian pipeline dependency. This geopolitical shock created the precise conditions for sophisticated systematic positioning to generate outsized returns. However, those conditions have materially changed. European natural gas markets have calmed considerably, storage levels have stabilized, and the continent has successfully reduced its exposure to Russian gas through diversified supply arrangements and infrastructure investment.
In parallel with Foster's departure, Citadel has executed a strategic transition from pure energy trading toward direct asset ownership and production. The firm completed a $1 billion acquisition of Paloma Natural Gas assets in the Haynesville Shale formation in March 2025, subsequently rebranding the assets as Apex Natural Gas. This acquisition provides Citadel with integrated upstream exposure and direct participation in U.S. natural gas production rather than reliance on market volatility for returns.
Foster's exit was marked by substantial philanthropy. He donated £25 million to Mansfield College at Oxford University, his alma mater, establishing the gift as the largest single donation in the college's approximately 200-year institutional history. His departure reflects both the normalization of energy markets that enabled his extraordinary 2022 performance and Citadel's strategic evolution into direct energy asset ownership.
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