The present invention relates to novel crystal forms of 4-{[4-({[4-(2,2,2-trifluoroethoxy)-1,2-benzisoxazol-3-yl]oxy}methyl)piperidin-1-yl]methyl}-tetrahydro-2H-pyran-4-carboxylic acid. More particularly, the invention relates to polymorph forms of Polymorph Form I, Polymorph Form II, Polymorph Form III, Polymorph Form IV, Polymorph Form V, and Polymorph Form VI, and to processes for the preparation of, compositions containing and to uses of, such polymorph forms.