Muriel Maffre, a former principal with San Francisco Ballet who now performs as a guest artist with Alonzo King's LINES Ballet, was named Chevalier de l"ordre des Arts et des Lettres by the French Ministry of Culture
Maffre retired in May 2007 but continued to dance. Similarly, Ileana Lopez -- arguably the most beloved of Miami City Ballet Principals -- retired in May 2004 but continues to dance as a member of the classically-trained contemporary company Ballet Gamonet. (She moved to Gamonet after a stint as one of MCB's Ballet Mistresses.)
Clearly, some dancers at the top just don't want to give up performing and are willing to take on a new repertoire in a smaller company in order to extend their careers.
Are there any other principal dancers with long-term associations to a single company who have retired from the company and then gone on to real commitments to a smaller company.
(I'm not thinking about people like Ananiashvili, who leave one company in order to guest extensively around the world, though if you want to mention one of those, that's fine, too. )