Kodaira dimension of $\mathrm{S}\mathrm{U}(m)$-structures

We study the Kodaira dimension of almost complex manifolds admitting an $\mathrm{S}\mathrm{U}(m)$-structure. We introduce the notion of almost complex structure of splitting type and of associated $\mathrm{S}\mathrm{U}(m)$-structure. When the latter is pseudoholomorphic, we provide two constructions that allow to obtain non-invariant almost complex structures with Kodaira dimension $0$, resp.\ with Kodaira dimension $-\mathrm{\infty }$. Our results apply, in particular, to complex structures of splitting type and to several almost complex manifolds already well-studied in the literature