Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
Talisman Energy Inc., up 83 cents to $5.12
The energy company confirmed that it is in discussions with Repsol and has been approached by other companies regarding a deal.
OPKO Health Inc., up 68 cents to $8.86
The biotechnology company signed a deal with Pfizer Inc. to develop and sell a long-acting treatment for growth hormone deficiency.
Regal Beloit Corp., up $2.04 to $70.42
The maker of controls for electric motors will buy a power transmissions unit from Emerson Electric Co. for about $1.4 billion.
PetSmart Inc., up $3.30 to $80.97
The pet supplies retailer said that is being sold to a group of investors led by buyout firm BC Partners for $8.7 billion.
American Realty Capital Properties Inc., down 76 cents to $8.23
The real-estate investment trust's chairman and its CEO resigned as the company faces scrutiny over accounting irregularities.
Riverbed Technology Inc., up $1.57 to $20.31
A private equity firm and a teacher pension will pay about $3.6 billion to take the computer networking equipment maker private.
Tuniu Corp., up 28 cents to $13.58
The online leisure travel company, which operates in China, said it received $148 million in funding from a group of investors.
Broadcom Corp., up 65 cents to $42.29
The communications and networking infrastructure company announced the release of new transceivers with a faster data rate.