  We study a multi-component dark matter model where interactions with the
Standard Model are primarily via the Higgs boson. The model contains
vector-like fermions charged under $SU(2)_W \times U(1)_Y$ and under the dark
gauge group, $U(1)^\prime$. This results in two dark matter candidates. A
spin-1 and a spin-1/2 candidate, which have loop and tree-level couplings to
the Higgs, respectively. We explore the resulting effect on the dark matter
relic abundance, while also evaluating constraints on the Higgs invisible width
and from direct detection experiments. Generally, we find that this model is
highly constrained when the fermionic candidate is the predominant fraction of
the dark matter relic abundance.
