Eagle Rock Energy Partners LP, a limited partnership that provides natural gas midstream services in TX and LA, priced its initial public offering of 12.5 million units at $19, the low end of its proposed $19 to $21 price range, on Tuesday night. UBS Investment Bank, Lehman Brothers and Goldman Sachs were joint book runners on the deal. The stock is expected to begin trading on the NASDAQ under the ticker EROC on Wednesday.

