I recently read the CFTC report from 2008. Inside the report, the CFTC had published long and short contracts held by various firms in the North American oil and gas markets. Although its old, I thought it was quite interesting.
Also seeing how there is a large interest in oil trading, there are some trading firms from 2008 that are still around and are unknown.
WTI Oil: http://www.sanders.senate.gov/imo/media/doc/energ…
Natural Gas: http://www.sanders.senate.gov/imo/media/doc/energ…
Heating Oil: http://www.sanders.senate.gov/imo/media/doc/energ…
