Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
Athlon Energy Inc., up $11.59 to $58.32
The oil and natural gas company is being bought by Encana for $5.93 billion in an effort to tap into the booming Permian Basin.
Civeo Corp., down $12.63 to $12.84
The energy industry workforce logistics company said it will move to Canada and it expects a downturn in the fourth quarter.
NiSource Inc., up $2.26 to $40.84
The gas and utility company plans to spin off its natural gas pipeline business into a stand-alone publicly traded company.
General Cable Corp., down $1.07 to $15.45
The cable products company won't proceed with a proposed $250 million debt offering, citing uncertain and weak market conditions.
DreamWorks Animation SKG Inc., up $5.82 to $28.18
The animation studio is said in media reports to be in discussions with telecommunications company SoftBank Corp. about a possible deal.
Tibco Software Inc., up $4.14 to $23.65
The cloud computing software company is selling itself to private equity firm Vista Equity Partners for about $3.98 billion.
Amag Pharmaceuticals Inc., up $6.54 to $29.72
The drug developer is buying the women's health care business of Lumara, gaining the key preterm birth prevention drug Makena.
Clovis Oncology Inc., up $5.59 to $48.08
The biotechnology company presented positive midstage study results for its ovarian cancer treatment Rucaparib.