* Advent won't withdraw offer after deadline-sources (Adds sources on Advent bid)
* Board proposes cash dividend of 15 percent of share nominal value for year 2016 Source: (http://bit.ly/2kYzcmZ) Further company coverage:
Feb 25 Warren Buffett said on Saturday he plans to stick with the shrewd bet that his Berkshire Hathaway Inc made on Bank of America Corp, but might eventually swap the preferred stock that Berkshire owns into common stock.
FRANKFURT, Feb 25 German generic drugs maker Stada Arzneimittel said on Saturday it had started a structured bidding process after receiving takeover bids from three buyout groups.
Feb 24 Pfizer Inc said it received subpoenas from the U.S. Attorney's Office for the District of Massachusetts related to its support for organizations that provide financial help to Medicare patients.
No related earnings announcements are currently scheduled within the next 7 days.