EQM Midstream Partners LP and Equitrans Midstream Corp. closed their $1.8 billion merger, according to a June 17 news release.

The midstream operators, spun off from Appalachian shale gas giant EQT Corp. in 2018, announced the plan to merge and overhaul their structure to support the producer in late February. The midstream companies agreed to a share-for-unit merger that would simplify the entities, converting into a C-corporation structure and acquiring EQT's equity stake in Equitrans. The shareholders and limited partners of the two companies ratified the merger June 15.

Equitrans started its corporate simplification in 2018 after becoming a stand-alone midstream company, the company said in the release.

Equitrans acquired all of the outstanding common units representing limited-partner interests in EQM that it did not already own, according to the release. EQM's common units have stopped trading on the New York Stock Exchange.

In addition, EQM closed the redemption of $600 million of its outstanding series A perpetual convertible preferred units. All of EQM's remaining series A units were exchanged for Equitrans' series A perpetual convertible preferred shares.