Alamos Gold, Builders FirstSource, JetBlue, Arrowhead and Qualcomm are big market movers

NEW YORK – Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:

NYSE

Alamos Gold Inc. (AGI), up 39 cents to $6.28

The Canadian gold mining company is merging with fellow gold mining company AuRico Gold Inc. in a deal worth about $1.5 billion.

Basic Energy Services Inc. (BAS), down 65 cents to $7.67

The energy industry services company said its rig count remained unchanged and it continues facing fierce rate competition.

Perrigo Co. (PRGO), up $3.33 to $201.88

Mylan said it filed notice of its proposed buyout with antitrust regulators as it awaits a response from the generic drug company.

Nasdaq

Builders FirstSource Inc. (BLDR), up $4.67 to $11.57

The building materials supplier will buy fellow buildings material supplier ProBuild Holdings LLC for about $1.63 billion in cash.

Sears Holdings Corp. (SHLD), up 31 cents to $43.24

The retailer entered a deal with mall operator Simon Property Group aimed at extracting value from its real estate holdings.

JetBlue Airways Corp. (JBLU), up 81 cents to $19.85

The airline reported a 9.2 percent boost in March passenger traffic compared with a year ago and a 6.2 percent boost in capacity.

Arrowhead Research Corp. (ARWR), up 9 cents to $8.00

The Food and Drug Administration cleared the drug developer for midstage development of a potential hepatitis B treatment.

Qualcomm Inc. (QCOM), down 43 cents to $68.73

The chipmaker is being urged to break up by Jana Partners LLC in order to boost the stock, according to the Wall Street Journal.