Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:
Barnes & Noble Inc., up $7.07 at $20.75
Technology company Microsoft is teaming up with the bookseller to set up a new company that will hold its digital and college businesses.
Sunoco Inc., up $8.38 at $49.29
Natural gas pipeline company Energy Transfer Partners said it is buying the oil pipeline company in a deal valued at $5.3 billion.
NYSE Euronext Inc., down $1.32 at $25.75
The owner of the New York Stock Exchange said that its first-quarter earnings fell due to a failed merger with Deutsche Boerse.
Humana Inc., down $7.14 at $80.68
The health insurer said that its first-quarter profit fell 21 percent as it paid out more in claims and increased its spending.
Haemonetics Corp., up $2.86 at $71.57
The health care company is buying some blood transfusion assets from filtration equipment maker Pall Corp. for $550 million.
Demand Media Inc., up $1.06 at $8.31
AllThingsD.com reported that the online publisher turned down a $1.2 billion bid from private equity firm Thomas H. Lee Partners.
Gen-Probe Inc., up $12.84 at $81.55
Medical device maker Hologic Inc. said that it will buy the diagnostic test maker for about $3.72 billion in an all-cash deal.
Books-A-Million Inc., up 64 cents at $3.19
The family that controls the bookseller said it is offering to buy the company and take it private in a $22.9 million deal.