GeoSphere Capital Management is located in New York City, and is managed by Arvind Sanger. The firm had seen its assets decline from $1.4 billion to $200 million at the end of last year, but an individual client boosted AUM to $400 million in the "eleventh hour" late in 2012. Many of the firm's leaders, including Arvind Sanger, are ex-SAC Capital alums.