Heterotic little string theories and holography

It has been conjectured that little string theories in six dimensions are h olographic to critical string theory in a linear dilaton background. We tes t this conjecture for theories arising on the worldvolume of heterotic five branes. We compute the spectrum of chiral primaries in these theories and c ompare with results following from type-I-heterotic duality and the AdS/CFT correspondence. We also construct holographic duals for heterotic fivebran es near orbifold singularities. Finally we find several new little string t heories which have Spin(32)/Z(2) or E-8 x E-8 global symmetry but do not ha ve a simple interpretation either in heterotic or M-theory.