  We present a search for low energy antineutrino events coincident with the
gravitational wave events GW150914 and GW151226, and the candidate event
LVT151012 using KamLAND, a kiloton-scale antineutrino detector. We find no
inverse beta-decay neutrino events within $\pm 500$ seconds of either
gravitational wave signal. This non-detection is used to constrain the electron
antineutrino fluence and the luminosity of the astrophysical sources.
