EXCLUSIVE-Energy trader Castleton sets up oil-focused team in Geneva, sources say

ReutersSep 3, 2025 2:21 PM

By Shariq Khan and Georgina McCartney

NEW YORK/HOUSTON, Sept 3 (Reuters) - Energy-focused trader Castleton Commodities International has set up a Geneva, Switzerland-based team in recent weeks as part of broader efforts to expand its presence in oil trading, two sources familiar with the matter said on Wednesday.

The Stamford, Connecticut-based company has hired Roberto Rosales to lead the Geneva-based team, the sources said. Rosales was previously a senior oil trader at billionaire Izzy Eglander's hedge fund Millennium Management.

Boyan Shmorhun, a North Sea trader at Gunvor, will also join Castleton's Geneva team, the sources said.

The sources requested anonymity to discuss confidential information.

Castleton declined to comment. Rosales could not be contacted for comment. Shmorhun did not respond to a request for comment.

Castleton and other commodities traders have been bolstering their energy-focused teams in recent years, using record profits they've made trading oil and natural gas through a period of extreme volatility in both markets.

Earlier this year, the company hired Patrick Guillot as a crude trader in Houston, his LinkedIn profile showed. Guillot was previously a managing director and crude oil trader for Freepoint Commodities, the profile showed.

Castleton also brought on Jason Kalish as an executive director in May, his LinkedIn profile showed. Kalish previously traded oil and biofuels for Freepoint, it showed.

Castleton's headcount has grown 7% over the past year, according to LinkedIn data.

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