  Detections of very-high-energy (VHE; > 100 GeV) photons from Gamma-ray bursts
(GRBs) can provide fundamental information on the involved radiative processes,
physical composition of the ejecta and acceleration processes. The High
Altitude Water Cherenkov (HAWC) gamma-ray observatory is the best gamma-ray
instrument to study transient phenomena over a long period of time from 100 GeV
to 100 TeV. Its large field of view and duty cycle (> 95%) allow it to search
blindly for sources of GRBs and to follow up on external alerts from satellite
instruments, such as Fermi and Swift, searching for their VHE counterpart. We
present results from the on-going GRB monitoring program and VHE upper limits
of the latest interesting low-redshift and/or powerful bursts in HAWC's field
of view: GRB 170206A, GRB 170817A, GRB 180720B and GRB 190114C.
