  We present a public data release of halo catalogs from a suite of 125
cosmological $N$-body simulations from the Abacus project. The simulations span
40 $w$CDM cosmologies centered on the Planck 2015 cosmology at two mass
resolutions, $4\times 10^{10}\;h^{-1}M_\odot$ and $1\times
10^{10}\;h^{-1}M_\odot$, in $1.1\;h^{-1}\mathrm{Gpc}$ and
$720\;h^{-1}\mathrm{Mpc}$ boxes, respectively. The boxes are phase-matched to
suppress sample variance and isolate cosmology dependence. Additional volume is
available via 16 boxes of fixed cosmology and varied phase; a few boxes of
single-parameter excursions from Planck 2015 are also provided. Catalogs
spanning $z=1.5$ to $0.1$ are available for friends-of-friends and Rockstar
halo finders and include particle subsamples. All data products are available
at https://lgarrison.github.io/AbacusCosmos
