  We present an update of the Fermilab Lattice and MILC Collaborations project
to compute the form factors for semileptonic $B_{(s)}$-meson decays. Our
calculation uses the highly improved staggered quark (HISQ) action for sea and
valence quarks, and ensembles with up, down, strange, and charm quarks in the
sea. Using a highly improved action with the MILC Collaboration's gauge
ensembles with lattice spacings down to $a\approx0.03$ fm, allows the heavy
valence quarks to be treated with the same discretization as the light and
strange quarks. This unified treatment of the valence quarks allows for
absolutely normalized vector currents, bypassing the need for perturbative
matching, which has been a source of uncertainty in previous calculations of
$B$-meson decay form factors by our collaboration. All preliminary form-factor
results are blinded.
