Hat Linux 6.1. Red Hat acquired Planning Technologies, Inc. in 2001 and AOL's iPlanet directory and certificate-server software in 2004. Red Hat moved its headquarters from Durham to North Carolina State University's Centennial Campus in Raleigh, North Carolina in February 2002. In the following month Red Hat introduced Red Hat Linux Advanced Server, later renamed Red Hat Enterprise Linux (RHEL). Dell, IBM, HP and Oracle Corporation announced their support of the platform. In December 2005, CIO Insight magazine conducted its annual "Vendor Value Survey", in which Red Hat ranked #1 in value for the second year in a row. Red Hat stock became part of the NASDAQ-100 on December 19, 2005. Red Hat acquired open-source middleware provider JBoss on June 5, 2006, and JBoss became a division of Red Hat. On September 18, 2006, Red Hat released the Red Hat Application Stack, which integrated the JBoss technology and which was certified by other well-known software vendors. On December 12, 2006, Red Hat stock moved from trading on NASDAQ (RHAT) to the New York Stock Exchange (RHT). In 2007 Red Hat acquired MetaMatrix and made an agreement with Exadel to distribute its software. On March 15, 2007, Red Hat released Red Hat Enterprise Linux 5, and in June acquired Mobicents. On March 13, 2008, Red Hat acquired Amentra, a provider of systems integration services for service-oriented architecture, business process management, systems development and enterprise data services. On July 27, 2009, Red Hat replaced CIT Group in Standard and Poor's 500 stock index, a diversified index of 500 leading companies of the U.S. economy. This was reported as a major milestone for Linux. On December 15, 2009, it was reported that Red Hat will pay to settle a class action lawsuit related to the restatement of financial results from July 2004. The suit had been pending in U.S. District Court for the Eastern District of North Carolina. Red Hat reached the proposed settlement agreement and recorded a one-time charge of for the quarter that ended Nov. 30. On January 10, 2011, Red Hat announced that it would expand its headquarters in two phases, adding 540 employees to the Raleigh operation, and investing over . The state of North Carolina is offering up to in incentives. The second phase involves "expansion into new technologies such as software virtualization and technology cloud offerings". On August 25, 2011, Red Hat announced it would move about