The top after-market NASDAQ gainers Thursday were Exide Technologies, Ubiquiti Networks Inc, Microchip Technology Inc, and Kforce, while the top after-market NASDAQ losers were Nuance Communications Inc, Coinstar Inc, Riverbed Technology Inc, and SunPower Corporation.

Gainers

Exide Technologies (NASDAQ:XIDE) shares gained 13.16 percent to $3.21 in post-market trading. The stock has a 52-week low of $2.25, a 52-week high of $4.15 and $225.20 million in market capitalization.

Ubiquiti Networks Inc (NASDAQ:UBNT) shares climbed 9.28 percent to $16.25 in post-market trading Thursday, as the company announced that for the second quarter of 2013, it expects revenues in the range of $70 million to $78 million, GAAP Diluted EPS of $0.18 to $0.21 and Non-GAAP Diluted EPS of $0.17 to $0.20. According to I/B/E/S Estimates, analysts were expecting the company to report revenue of $69 million and EPS of $0.17 for the second quarter of 2013.

Microchip Technology Inc (NASDAQ:MCHP) shares advanced 6.36 percent to $36.10 in post-market trading. The company declared a quarterly dividend of $0.353 per share, or $1.412 annualized. This is a 0.3 percent increase from the prior dividend of $0.352. The dividend will be payable March 7, 2013, to stockholders of record as of Feb. 21, 2013, with an ex-dividend date of Feb. 19, 2013.

Kforce Inc (NASDAQ: KFRC) shares gained 5.33 percent to $15.65 in post-market trading. The stock has a 52-week low of $10.34, a 52-week high of $16.47 and $534.29 million in market capitalization.

Losers

Nuance Communications Inc (NASDAQ:NUAN) shares declined 15.27 percent to $20.80 in post-market trading. The company reported first quarter adjusted net income of $0.35 per share after the bell Thursday, compared to $0.34 per share in the previous year. The consensus estimate was for EPS of $0.36. The stock is now down 2.27 on 199K shares.

Coinstar Inc ((NASDAQ:CSTR) shares dropped 8.69 percent to $47.57 in post-market trading. The stock has a 52-week low of $40.50, a 52-week high of $71.82 and $1.57 billion in market capitalization.

Riverbed Technology Inc (NASDAQ:RVBD) shares slumped 8.51 percent to $18.39 in post-market trading. The stock tumbled after the company reported fourth quarter non-GAAP net income of $0.29 per share after the bell Thursday, compared to $0.25 per share a year ago. The consensus estimate was for EPS of $0.29. The stock is now down 1.10 on 191K shares.

SunPower Corporation (NASDAQ:SPWR) shares fell 4.17 percent to $8.05 in post-market trading. The company announced financial results for its fiscal 2013 second quarter ended Dec. 29, 2012. Revenue for period under consideration was $10.8 million, below $15.2 million in revenue for the second quarter of fiscal 2012, and slightly below $11.4 million in revenue for the previous first quarter of fiscal 2013.

Investment NASDAQ OMX Group