The top after-market Nasdaq gainers Friday were Homeowners Choice Inc, Mercury Computer Systems, Career Education Corporation and Atmel Corporation.

The top after-market Nasdaq losers were Approach Resources Inc, Rovi Corporation, FEI Company and comScore Inc.

Gainers

Homeowners Choice Inc (HCII) shares climbed 6.01 percent to $19.59 in the after-hours trading. The company shares lost 4.20 percent in regular trading Friday.

Mercury Computer Systems Inc (MRCY) rose 4.41 percent in the post-market trading to close at $9.28. The company stock has a 52-week low of $8.85, a 52-week high of $17.06 and $ 275.23 million in market capitalization.   

Career Education Corporation (CECO) shares advanced 4.56 percent to $3.22 in the post-market trading. The company shares dropped past its previous 52-week low to $3.09 in regular trading Friday and the company has $206.97 million in market capitalization.

Atmel Corporation (ATML) shares gained 4.06 percent and reached $5.66 in the after-hours trading. The semiconductor company announced Friday that it will present at the following investor conferences: Stephen Cumming, Vice President and Chief Financial Officer, will present at the 14th Annual Pacific Crest Global Technology Leadership Forum in Vail, Colorado, at the Sonnenalp Resort at 3:30 p.m. Mountain Time on Aug. 13; Stephen Cumming will present at the Canaccord Genuity Growth Conference in Boston, Massachusetts, at the InterContinental Hotel at 11:30 a.m. Eastern Time on Aug. 15.

Losers

Approach Resources Inc (AREX) slumped 9.70 percent to $ 24.44 in the post-market trading, Friday. The company stock has a 52-week low of $14.14, a 52-week high of $39.18 and $907.23 million in market capitalization.   

Rovi Corporation (ROVI) shares declined 8.04 percent to $13.35 in the after-hours trading.  The company stocks surged 8.93 percent in regular hour trading Friday, the shares have a 52-week low of $9.91, a 52-week high of $51.83 and $1.61 billion in market capitalization.   

FEI Company (FEIC) shares lost 7.57 percent in the after-hours trading to reach $48.51. The company shares had gained 12.43 percent in the regular trading session Friday, after the company announced its quarterly report on Thursday that beat the market expectations.  

comScore (SCOR) shares dropped 7.02 percent to $11.35 in the after-hours trading. The company shares lost 20.97 percent in the regular trading. Matt Chesler, Deutsche Bank analyst, downgraded rating on the shares of comScore Inc. from "Buy" to "Hold".