  4U 0142+61 is one of a small class of persistently bright magnetars. Here we
report on a monitoring campaign of 4U 0142+61 from 2011 July 26 - 2016 June 12
using the Swift X-ray Telescope, continuing a 16 year timing campaign with the
Rossi X-ray Timing Explorer. We show that 4U 0142+61 had two radiatively loud
timing events, on 2011 July 29 and 2015 February 28, both with short soft
gamma-ray bursts, and a long-lived flux decay associated with each case. We
show that the 2015 timing event resulted in a net spin-down of the pulsar due
to over-recovery of a glitch. We compare this timing event to previous such
events in other high-magnetic-field pulsars, and discuss net spin-down glitches
now seen in several young, high-B pulsars.
