Question: Where is the headquarters located of the shipping company involved in the Rena oil spill?

Context paragraphs:
Mediterranean Shipping Company: Mediterranean Shipping Company S.A. (MSC) is the world's second-largest shipping line in terms of container vessel capacity.  As a private company it has no obligation to publish annual reports certified by independent parties; as a consequence, the data MSC releases about itself is not verifiable.  As of the end of December 2014, MSC was operating 471 container vessels with an intake capacity of 2,435,000 twenty-foot equivalent units (TEU) .  The Geneva-headquartered company operates in all major ports of the world.  MSC's most important port is Antwerp in Belgium.

2007 South Korea oil spill: The MT "Hebei Spirit" oil spill was a major oil spill in South Korea that began on the morning of 7 December 2007 local time, with ongoing environmental and economic effects.  Government officials called it South Korea's worst oil spill ever, surpassing a spill that took place in 1995.  This oil spill was about one-third of the size of the "Exxon Valdez" oil spill.

Mingbulak oil spill: The Mingbulak oil spill also known as the Fergana Valley oil spill was the worst terrestrial oil spill in the history of Asia.  The oil spill was caused by a blowout on March 2, 1992 at the Mingbulak oil field in the Fergana Valley, Uzbekistan at well #5.  The Crude oil released from the well burned for two months.  The blowout resulted in the release of 35000 oilbbl to 150000 oilbbl per day.  In total, 2000000 oilbbl were collected behind emergency dykes.  The oil stopped flowing by itself.  A total of 285,000 tons of oil were released, and it was the fifth largest oil spill in history.  The spill is considered the largest inland spill in history.

Rena oil spill: The "Rena" oil spill occurred off the coast of Tauranga in New Zealand.  The spill was caused by the grounding of  on the Astrolabe Reef.  The "Rena" was a container ship and cargo vessel owned by the Greek shipping company Costamare Inc., through one of its subsidiary companies, and chartered by the Mediterranean Shipping Company (MSC).  The spill has been described as New Zealand's worst maritime environmental disaster.

Efforts to stem the Deepwater Horizon oil spill: Efforts to stem the "Deepwater Horizon" oil spill were ongoing from the time that the "Deepwater Horizon" exploded on April 20, 2010 until the well was sealed by a cap on July 15, 2010.  Various species of dolphins and other mammals (61 casualties), birds (2,095 casualties), and the endangered sea turtles (467 casualties) have been killed either directly or indirectly by the oil spill.  The "Deepwater Horizon" spill has surpassed in volume the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters; it is comparable to the 1979 Ixtoc I oil spill in total volume released (Ixtoc discharged 140 e6USgal to 148 e6USgal ; as of mid-July 2010, Deepwater Horizon has spilled 90 e6USgal to 180 e6USgal ).

Prudhoe Bay oil spill: The Prudhoe Bay oil spill (2006 Alaskan oil spill) was an oil spill that was discovered on March 2, 2006 at a pipeline owned by BP Exploration, Alaska (BPXA) in western Prudhoe Bay, Alaska.  Initial estimates of the five-day leak said that up to 267000 USgal were spilled over 1.9 acre , making it the largest oil spill on Alaska's north slope to date.  Alaska's unified command ratified the volume of crude oil spilled as 212252 USgal in March 2008.  The spill originated from a 0.25 in hole in a 34 in diameter pipeline.  The pipeline was decommissioned and later replaced with a 20 in diameter pipeline with its own pipeline inspection gauge (pig) launch and recovery sites for easier inspection.

Timeline of the Deepwater Horizon oil spill: The following is a timeline of the "Deepwater Horizon" oil spill (also referred to as the BP oil spill, the Gulf of Mexico oil spill or the Macondo blowout).  It was a massive oil spill in the Gulf of Mexico, the largest offshore spill in U.S. history.  It was a result of the well blowout that began with the "Deepwater Horizon" drilling rig explosion on April 20, 2010.

Exxon Valdez: Oriental Nicety, formerly Exxon Valdez, Exxon Mediterranean, SeaRiver Mediterranean, S/R Mediterranean, Mediterranean, and Dong Fang Ocean, was an oil tanker that gained notoriety after running aground in Prince William Sound spilling hundreds of thousands of barrels of crude oil in Alaska.  On March 24, 1989, while owned by the former Exxon Shipping Company, and captained by Joseph Hazelwood and First Mate James Kunkel bound for Long Beach, California, the vessel ran aground on the Bligh Reef resulting in the second largest oil spill in United States history.  The size of the spill is estimated to have been 40900 to , or 257,000 to 750,000 barrels.  In 1989, the "Exxon Valdez" oil spill was listed as the 54th largest spill in history .

Deepwater Horizon oil spill: The "Deepwater Horizon" oil spill (also referred to as the BP oil spill, the BP oil disaster, the Gulf of Mexico oil spill, and the Macondo blowout) began on April 20, 2010, in the Gulf of Mexico on the BP-operated Macondo Prospect.  Killing eleven people, it is considered the largest marine oil spill in the history of the petroleum industry and estimated to be 8% to 31% larger in volume than the previous largest, the Ixtoc I oil spill.  The US Government estimated the total discharge at 4.9 Moilbbl .  After several failed efforts to contain the flow, the well was declared sealed on September 19, 2010.  Reports in early 2012 indicated that the well site was still leaking.

Exxon Valdez oil spill: The "Exxon Valdez" oil spill occurred in Prince William Sound, Alaska, March 24, 1989, when "Exxon Valdez", an oil tanker owned by Exxon Shipping Company, bound for Long Beach, California, struck Prince William Sound's Bligh Reef at 12:04 am local time and spilled 10.8 e6USgal of crude oil over the next few days.  It is considered to be one of the most devastating human-caused environmental disasters.  The "Valdez" spill is the second largest in US waters, after the 2010 "Deepwater Horizon" oil spill, in terms of volume released.  Prince William Sound's remote location, accessible only by helicopter, plane, or boat, made government and industry response efforts difficult and severely taxed existing response plans.  The region is a habitat for salmon, sea otters, seals and seabirds.  The oil, originally extracted at the Prudhoe Bay oil field, eventually covered 1300 mi of coastline, and 11000 sqmi of ocean.

Supporting paragraphs: Rena oil spill Mediterranean Shipping Company
Answer: Geneva