5. Ecolab ( ECL) markets cleaning and sanitizing products and pest-elimination services for hotels, food service and health care industries. In July, ECL announced it would acquire Nalco Holding Company, a water treatment and process improvement company, for a total consideration of $8.04 billion in a stock and cash deal, according to Bloomberg. The deal closed at the end of November. Ecolab said the deal identified cost synergies of $150 million and attractive revenue opportunities. The transaction is expected to be accretive to EPS in 2012 and subsequent years, leading to double-digit growth rates for the company, Ecolab said. Of the 18 analysts covering Ecolab, 67% rate the stock a buy. On average, analysts polled by Bloomberg expect the stock to gain an average of 8.8% to $61.92 in the coming 12 months.