Amblimation's artists came to DreamWorks in 1995, when the studio's last feature, Balto, was completed, with the rest doing so following the studio's closure in 1997. In 1995, DreamWorks signed a co-production deal with Pacific Data Images to form subsidiary PDI, LLC (PDI owned 60% of PDI, LLC, while DreamWorks SKG owned 40%). This new unit would produce computer-generated feature films, beginning with Antz in 1998. In the same year, DreamWorks SKG produced The Prince of Egypt, which used both CGI technology and traditional animation techniques. In 1997, DreamWorks partnered with British stop-motion animation studio Aardman Animations to co-produce and distribute Chicken Run (2000), a stop-motion film already in pre-production. Two years later they extended the deal for an additional four films. With Aardman doing stop-motion and the existing traditional and computer productions, they covered all three major styles of animation. This partnership had DreamWorks participating in the production of stop-motion films in Bristol, and also had Aardman participating in some of the CGI films made in the United States. Three years later, DreamWorks SKG created DreamWorks Animation, a new business division that would regularly produce both types of animated feature films. The same year DW acquired majority interest (90%) in PDI, and reformed it into PDI/DreamWorks, the Northern California branch of its new business division. In 2001, Shrek was released and went on to win the first Academy Award for Best Animated Feature Film. Due to the success of CGI animated films, DWA decided the same year to exit hand-drawn animation business after their next two films, Spirit: Stallion of the Cimarron (2002) and Sinbad: Legend of the Seven Seas (2003), making a total of four hand-drawn films. Beginning with Shrek 2 (2004), all released films, other than some co-produced with Aardman, were expected to be produced with CGI. The releases of Shrek 2 and Shark Tale also made DWA the first animation studio to produce two CGI animated features in a single year. Public corporation (2004–2016) The animation division was spun off into a publicly traded company named DreamWorks Animation SKG, Inc. (doing business as DreamWorks Animation LLC) on October 27, 2004, and traded via the New York Stock Exchange. Katzenberg headed the new division, while Spielberg and Geffen remained on board as investors and consultants. DWA also inherited interests in PDI/DreamWorks. They made an agreement with their former parent to distribute all of their films until they