Deals of the day-Mergers and acquisitions
(Adds Wal-Mart, Biogen, Aetna, Time Warner, Titan Cement, LOT, Irving Oil; Updates Fiat, Petrobras)
Aug 3 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Wednesday:
** Wal-Mart Stores Inc is in talks to buy Jet.com, a year-old online rival, as part of a multibillion-dollar revamp of its e-commerce division aimed at boosting online sales growth. The online retailer could be worth as much as $3 billion.
** U.S. biotechnology company Biogen Inc has not received any formal expressions of interest from potential acquirers and is not actively soliciting takeover offers, according to a person familiar with the matter.
** Samsung Electronics could buy Fiat Chrysler Automobiles' parts maker, Magneti Marelli, for more than $3 billion, Bloomberg said in a source-based report.