Established in 1968, Atwood has long been recognized for providing safe, reliable and efficient drilling services. Today, we own 13 drilling rigs that operate in many of the leading worldwide offshore hydrocarbon basins, and we maintain offices on five continents. We have a multinational workforce of approximately 1,200 people who are passionate about offshore drilling and focused on enabling our clients' success. We are expanding and transforming our fleet by constructing high-specification rigs that position us for even greater success in the future.
Two of our newbuild Pacific Class 400-foot jackups, the Atwood Mako and Atwood Manta, entered service in late 2012 while their sister rig, the Atwood Orca, was delivered in April 2013. We are constructing the Atwood Advantage, Atwood Achiever, Atwood Admiral and Atwood Archer; all four are dynamically-positioned, dual derrick ultra-deepwater drillships rated to operate in water depths up to 12,000 feet and drill to depths of 40,000 feet. These rigs are scheduled to join the Atwood fleet in September 2013, June 2014, March 2015 and December 2015, respectively. In aggregate, these seven newbuild rigs represent a major expansion and transformation of the Atwood drilling fleet.
Our accomplishments have been recognized by others over the years. Atwood Oceanics was named to Forbes' 2012 "Best Small Company" list for the 6th consecutive year. From 2007-2010, our company was ranked as one of Fortune Magazine's 100 Fastest Growing U.S. Companies. Despite these notable successes, we know that our best is yet to come.
Atwood has a proud history of working closely with our clients on health, safety and environmental (HSE) matters. Accomplishments that highlight our strong HSE record include ExxonMobil's "Safe Drilling Contractor of the Year", "Gold Award" and "Grand Award"; British Gas' Chairman's Award; Hess' Chairman's Award for Safety Excellence; IADC's "Accident Prevention Award" in the U.S. and International; and APPEA's "Best Safety Award" in Australia. In 2011, the Atwood Falcon was named by Shell as their "Floater Rig of the Year" based on the rig's excellent safety and operational performance. In 2012, Atwood was ranked first among all offshore drillers for HSE performance by EnergyPoint Research.
We have embodied our values and beliefs in Our Guiding Principles, developed exclusively by Atwood employees. These statements describe our people, our mission and the five key values that govern how we operate: Safety and Environmental Stewardship, Client Satisfaction, Employee Focus, Value Creation and Integrity and Respect. Together, they define our commitment to excellence and to doing things the right way.
Operating for over 40 years, Atwood has established itself as a premier offshore drilling contractor. Our ambitious fleet expansion and transformation program, coupled with our reputation for providing safe and quality drilling services, enables us to stake our claim as the leader in high-specification offshore drilling services.
Atwood Oceanics, Inc. is headquartered in Houston, Texas, and our shares are traded on the New York Stock Exchange under the symbol ATW.