  We propose a simple renormalizable model of baryogenesis and asymmetric dark
matter generation at the electroweak phase transition. Our setup utilizes the
two Higgs doublet model plus two complex gauge singlets, the lighter of which
is stable dark matter. The dark matter is charged under a global symmetry that
is broken in the early universe but restored during the electroweak phase
transition. Because the ratio of baryon and dark matter asymmetries is
controlled by model parameters, the dark matter need not be light. Thus, new
force carriers are unnecessary and the symmetric dark matter abundance can be
eliminated via Higgs portal interactions alone. Our model places a rough upper
bound on the dark matter mass, and has implications for direct detection
experiments and particle colliders.
