If few people can name an Argentine multinational, that is because there are only two of them: Arcor, a chocolate maker, and Tenaris, a steel-pipe maker.

ECONOMIST: Use your brains

Companies that supply the drillers were also among the buys, including seamless pipe maker Tenaris S.A. (nyse: TS - news - people ).

FORBES: Gurus Drop Goldman, Grab Energy

Tyco (NYSE:TYC) spun off its ADT Corp. (NYSE: ADT) alarm security business as a separate public company on October 2 after selling its pipe and valve business earlier this year to pump maker Pentair.

FORBES: Corporate Castoffs Can Be Keepers