Pfizer will present a nearly $4 billion offer for Germany’s Ratiopharm this week, sources tell Reuters, launching a possible bidding war with Teva Pharmaceutical and Actavis. A decision is unlikely before the end of the month.

Hedge fund Elliot Associates offers to buy Novell Inc — the world’s No. 2 maker of Linux — sending its shares up 28 percent. Speculation is that other bidders could come in and drive the price up further.

Britain’s Prudential seems to have stopped its decline after it announced a $35.5 billion takeover of AIA — the Asian life insurance business of AIG. The stock dropped a fifth since the Pru announced its offer, but it’s now bounced a percent or so.

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Plus, in other media:

Japanese carmaker Mitsubishi is in talks with France’s PSA Peugeot Citroen about extending an alliance but a capital tie-up is not on the agenda,  La Tribune newspaper says.