Thursday's Small-Cap Winners & Losers

Spartan Motors (SPAR Quote) surged more than 30% after the maker of custom motor vehicle chassis and bodies more than tripled its earnings year over year to $3.3 million, or 16 cents a share, on revenue of $123.6 million in the fourth quarter. These numbers include a noncash goodwill charge of a dime a share. Analysts were looking for earnings of 17 cents a share on $102.3 million revenue. The Michigan-based company was rising $5.31 to $22.20.

Salary-management Web site Salary.com (SLRY Quote) jumped 20% after the launch of its initial public offering, which priced 5.7 million shares at $10.50 apiece. The offering, for which Thomas Weisel Partners is the sole book runner, includes an underwriter's option for another 855,000 shares to cover overallotments. The IPO should close Feb. 21. Shares of the Waltham, Mass., company were up $2.10 to $12.60.

OpNext (OPXT Quote) also debuted with a bang today, with an IPO of roughly 16.9 million shares priced at $15 apiece, 10 million of them sold by the Eatontown, N.J., company, itself. The underwriters, led by Goldman Sachs, can purchase roughly another 2.5 million shares. The company, which makes optical components for high-speed telecommunications equipment, was climbing $2.49, or 16.6%, to $17.49.

Stratasys (SSYS Quote) surged on impressive fourth-quarter results. The Eden Prairie Minn.-based maker of printing systems said income (sans stock option expenses) totaled $3.9 million, or 38 cents a share, on $29.7 million revenue that was 26% higher than last year. Year-ago profits came to $3.1 million, or 30 cents a share. Analysts sought 36 cents a share on $27.6 million in sales. Shares were gaining $5.30, or 16.3%, to $37.81.