  The VERITAS array of Cherenkov telescopes was used to observe ~130 blazars
from 2007 to 2012. Of these, 25 were detected as very-high-energy (VHE; E > 100
GeV) sources. We present here the results of the analysis of 65 VERITAS
non-detected blazars, including upper limits on their VHE flux. Results from a
stacked analysis of the entire data set and of smaller sub-sets (defined as a
function of the redshift and the blazar class) are presented and discussed.
