AMC shares tumble on revised stock-conversion plan, U.S. Steel’s stock surges on takeover bid and more stocks on the move

These were some of the biggest movers and shakers in premarket trading Monday.

Stock gainers:

Shares of AMC Entertainment Holdings Inc.’s Preferred Equity units APE jumped 17% after a Delaware court on Friday approved a revised, but still controversial, stock-conversion plan for the movie-theater chain.

U.S….