Orthopedic product maker Orthofix International NV ( OFIX) said Thursday that its first-quarter profit fell to $3.6 million, or 21 cents a share, from $6.3 million, or 37 cents a share, in the year-ago period. Revenue rose 9% to $128 million from $117 million, beating expectations of analysts polled by Thomson Financial who expected profit of 9 cents a share on revenue of $122.5 million. The beat prompted a 12% rise in the stock, to $34.50. Costa Mesa, Calif.-based Volcom ( VLCM), which makes apparel for young men and young women, jumped 26% to $23.95 on first-quarter earnings of $9.3 million, or 38 cents a share, vs. $5.5 million, or 22 cents a share, a year ago. Analysts polled by Thomson Financial were looking for 21 cents a share. Advanced Medical Optics ( EYE) said its first-quarter net profit was $6.9 million, or 11 cents a share, down from $12.1 million, or 20 cents a share, a year earlier. Factoring out acquisition and restructuring charges, the company earned 22 cents a share, on net sales to $303.7 million. Analysts surveyed by Thomson Financial were looking for 22 cents a share, on revenue of $294.6 million. Shares rose 11.5% to $23.42. Medical technology company Hologix ( HOLX), which recently completed a 2-for-1 stock split, plummeted 18.6% to $23.75 Thursday after the company aired its second-quarter results. Revenue climbed to $431 million from $181.1 million. Hologic reported net income of $56 million, or 22 cents a share a share -- and adjusted profit of $76.2 million, vs. $24 million a year prior.