Transocean Provides Supplement to Proxy Statement (RIG)

Transocean Ltd. RIG today announced that a Supplement to its Proxy Statement is available through the company's website at http://www.deepwater.com/proxymaterials.cfm . The Supplement provides updated information related to the conditional Agenda Item 6 that would grant the Board of Directors the flexibility to accelerate or otherwise change the timing of the company's dividend payments in light of possible changes to Swiss tax law which may impact dividend payments. In addition, print copies are being mailed to the company's shareholders of record in advance of the company's 2011 Annual General Meeting, which will be held at 4 p.m., CEST, on May 13, 2011, in Cham, Switzerland.