Associated productions with top ($t+X, t \bar t+X with X=W,Z,\gamma, heavy-flavours, t \bar t$) at the LHC

Latest measurements of top quark pair production in association with electroweak bosons ($W$, $Z$ or $\gamma$) and heavy flavoured jets ($c\bar{c}$, $b\bar{b}$) using data collected by the ATLAS and CMS detector in LHC $pp$ collisions at 13 TeV are presented. Inclusive and differential measurements are included. In addition, a measurement of the very rare four-top-quark production using final states with one or two leptons plus jets and combining with previous results in the multilepton channel is reported.