Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
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DuPont Co., up $3.29 to $74.81
Institutional Shareholder Services said investor Nelson Peltz, who is seeking to break up the chemical maker, should be given seats on its board.
Deutsche Bank AG, down $1.65 to $32.61
The bank is reorganizing through branch spinoffs, office closings and by cutting its investment banking division.
Mercury General Corp., down $1.03 to $57.27
The auto insurance company reported a drop in first-quarter net income and the results fell short of Wall Street forecasts.
Mylan NV, down $4.34 to $71.72
The drug developer rejected rival Teva Pharmaceutical Industries' $40.1 billion buyout offer, saying it undervalued the company.
Celladon Corp., down $11.04 to $2.64
The biotechnology company's potential heart failure treatment Mydicar failed to meet key goals in a pivotal clinical trial.
Applied Materials Inc., down $1.83 to $19.97
The semiconductor company called off its $9.4 billion buyout of Tokyo Electron because of regulators' antitrust concerns.
ImmunoGen Inc., down $1.10 to $8.86
The cancer drugmaker suffered two setbacks to its drug development pipeline.
Akorn Inc., down $12.14 to $43.10
The drug developer will restate previous financial statements because it overstated certain amounts.