  We present an update on our calculations of the matrix elements of the CP
violating quark and gluon chromo-EDM operators, as well as the operators these
mix with, such as the QCD Theta-term. Their contribution to the neutron EDM is
obtained by extrapolating the $F_3$ form factor of a vector current to zero
momentum transfer. The calculation is being done using valence Wilson-clover
quarks on HISQ background configurations generated by the MILC collaboration.
