In the futures industry, a reportable position is the level of held futures contracts at which the customer must be identified to the exchange and to the Commodity Futures Trading Commission (CFTC). The CFTC produces a bi-weekly report, called the Commitment of Traders Report, for each commodities market; the report shows whether different classes of traders, such as institutions or hedge funds, are net buyers or net sellers of each commodity or financial instrument. The report summarizes all of the reportable positions. 
- reportable position definition. yourdictionary.com.