A partnership controlled by Marathon Petroleum Corp., a refinery and pipeline company, will buy MarkWest Energy Partners LP for US$15.8 billion in one of the biggest oil-patch deals since crude prices began to slump last summer.
The deal will marry Marathon’s oil pipeline network with MarkWest’s business separating natural gas into fuels such as propane and ethane.
The combined company would have a market capitalization of US$21 billion, making it the fourth-largest master limited partnership. These partnerships, which typically own infrastructure like pipelines that earn steady revenue from long-term contracts, have fared better than traditional drilling companies during the energy downturn but still have faced headwinds.
Shares of MPLX closed 15% lower to US$59, while shares of MarkWest rose nearly 14% to US$68. Shares of Marathon Petroleum Corp. rose 7.9%.
The deal is the latest consolidation between energy partnerships, which don’t pay corporate income taxes but distribute their available cash to shareholders. The need to keep these hefty payouts growing means the partnerships are always looking to expand.
Gary R. Heminger, Marathon’s chief executive, said the deal would allow the partnership to boost its annual distribution by 25% through 2017.
“The combination significantly increases our size, scale and the opportunity to grow over a very long period of time,” Mr. Heminger told analysts during a conference call on Monday.
Refiners have been among the newest energy companies to form these partnerships. Marathon Petroleum, of Findlay, Ohio, owns refineries in Texas, Louisiana, and throughout the Midwest. It launched MPLX in 2012 to own and operate pipelines and other fuel transportation assets.
But recently, refiner-backed partnerships have started to branch out beyond their parent companies—and beyond oil. Last year, a partnership controlled by Tesoro Corp., the refiner based in San Antonio, bought a natural gas gathering and processing company for US$2.5 billion.
Executives from Marathon and MarkWest said Monday that they began to explore the idea of combining after the two companies worked together on projects in the Northeast, where fuels known as natural gas liquids are commonly produced along with gas in the shale fields of Ohio and Pennsylvania.
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The combination illustrates that region’s allure, even as a glut of oil and gas has sent prices for these fuels plummeting in recent months and sparked concern that production could slow down. MarkWest is one of the largest natural-gas processors in the U.S., with a particularly large presence in the Northeast.
As oil prices continue to languish, diversifying into other fuels like natural gas and liquids including propane and ethane becomes more attractive, said Brandon Blossman, a managing director at Tudor Pickering Holt & Co., an energy investment bank based in Houston.
“Low oil prices and the implication that oil volume growth slows or stops has put pressure on the oil-focused midstream players think about diversification towards gas,” he said.
Energy Transfer Equity, a giant pipeline company based in Dallas, has been pursuing a merger with Williams Cos., a rival pipeline company based in Tulsa, Okla. For months, it has pressed Williams in the hope of acquiring that company’s large network of natural gas pipelines that crisscross the Northeast. Williams has said that Energy Transfer’s all-equity offer—which values it at US$48 billion—is too low.
For Marathon and MarkWest, both companies agreed that a combination would benefit shareholders and customers regardless of energy price conditions, said Frank Semple, chief executive of MarkWest.
“We were not looking for each other—we began the relationship from a commercial standpoint,” he said in an interview. “It was based on real synergies, real opportunities, real vision.”
Under the terms of the agreement announced Monday, MarkWest shareholders would receive 1.09 shares of Marathon’s partnership, MPLX LP, and US$3.37 in cash for each share held, for a total consideration of US$78.64 per share. That represents a 32% premium to MarkWest’s closing price Friday of US$59.75 a share. MarkWest would become a wholly owned subsidiary of MPLX.
Marathon will contribute US$675 million to fund the cash payment to MarkWest shareholders. – WSJ