Columbia Pipeline Partners LP posted the largest increase in short interest relative to shares outstanding among SNL-covered midstream and related companies between Dec. 30, 2016, and Jan. 13.

The percentage of the partnership's shares held short relative to shares outstanding climbed 244 basis points, to 4.27%, as of Jan. 13.

Energy Transfer Equity LP topped the list of midstream and related companies with the steepest decreases in short interest in the first half of January. The partnership saw short interest drop 80 basis points, to 4.40% of shares outstanding, at the end of the period.

Southwestern Energy Co. topped the list of most shorted midstream and related companies in the first half of January. The company saw short interest rise 44 basis points during the period, to 10.71% of shares outstanding.