Lots of mergers in my portfolio.

$GOGL (+0%) merging with $EURN (+2.59%)

$BRKL (-0.8%) merging with $BHLB (-0.44%)

$PPBI (+0%) merging with $COLB

$PFC merged with $WSBC (+0%) (sold)

Why are companies in my portfolio merging one after another i wonder.