ENERGY

Shamrock Sells Enterra Stake: Shamrock Holdings has sold its 1.9 million shares--or 11.8% interest--in Houston-based Enterra Corp. to institutional investors. “Shamrock made its original investment approximately five years ago and was instrumental in devising and implementing the strategy that has resulted in Enterra being one of the leading companies in the oil field service industry,” said Enterra CEO D. Dale Wood. Enterra is a worldwide provider of equipment and services for drilling and pipeline construction and rehabilitation.