Citrix Systems ( CTXS) shares were leaping 10.9% in after-hours trading Tuesday as the company said fourth-quarter earnings rose to $73 million excluding items, or 39 cents a share, edging past estimates by a penny. Last year, the Fort Lauderdale, Fla., infrastructure-software company made $67 million, or 36 cents a share. Revenue climbed 19% from last year to $321 million, topping the $311.4 million consensus, according to Thomson Financial. The results were called preliminary due to an ongoing internal stock-option grant review. Shares were up $3.25 to $33.12. Quanta Services ( PWR) soared after the Houston-based contractor drove up its fourth-quarter estimates. The company -- which deals in installation and maintenance relating to electricity and gas, among other things -- now expects to earn between 19 cents and 20 cents a share, excluding items. Previous guidance called for 11 cents to 14 cents a share. Sales are estimated at $590 million to $600 million, up from the prior range of $500 million to $525 million. Analysts are looking for 14 cents a share on $518.7 million revenue. Shares were adding $1.50, or 7.5%, to $21.40. RF Micro Devices ( RFMD) rose after the company more than tripled its earnings in the quarter ended Dec. 31, with income totaling $59.3 million, or 26 cents a share, on $281.1 million revenue. This compares with last year's $14.7 million, or 7 cents a share, on sales of $208 million. The Greensboro, N.C., maker of mobile-communications systems was rising 55 cents, or 8%, to $7.43.