Monday's Small-Cap Winners & Losers

Small-cap stocks, along with the broader market spent some time in the sun Monday, as the Russell 2000 was recently up 0.4% at 707.34 and the S&P SmallCap 600 lifted 0.4% to 366.04.

Shares of A.S.V. (ASVI Quote) surged 45% to $17.79 after Terex (TEX Quote) announced it would buy the Grand Rapids, Minn.-based maker of rubber track machines. Terex will shell out $488 million, or $18 a share, for the company.

In other buyout news, workplace services and daycare provider Bright Horizons (BFAM Quote) rose 34% to $44.01 after private investment firm Bain Capital Partners agreed to buy the Watertown, Mass., company for $1.3 billion, or $48.25 a share. The purchase price represents a 47% premium over Bright Horizons' Friday closing price.

Meanwhile, shares of energy provider Canadian Superior Energy (SNG Quote) jumped 25% to $3.76 on news that it had, along with partners BG International and Challenger Energy (CHQ Quote), discovered a source of natural gas off the coast of Trinidad.

Troy, Mich.-based supplier of integrated systems for motor vehicles ArvinMeritor (ARM Quote) likewise drove ahead 15% to $11.21 on a KeyBanc upgrade to buy from hold.

Among the biggest losers of the day was Openwave Systems (OPWV Quote). The Redwood City, Calif.-based maker of software for mobile devices dropped 20% to $1.86 on the departure of its chief financial officer, Jean-Yves Dexmier. He will be replaced by Anne Brennan, the vice president of finance, on an interim basis. Additionally, Openwave appointed Charles Levine as non-executive chairman of the board. He replaces interim chairman Robert Vrig, who will carry on as CEO. Following the announcement, JPMorgan downgraded the company to sell from neutral.