The top after-market NASDAQ gainers Thursday were NII Holdings, WD-40 Co, MAKO Surgical Corp, Xyratex Ltd and Repligen Corp. The top after-market NASDAQ losers were F5 Networks, Saba Software, Immersion Corp, PDC Energy and Citrix Systems Inc.

Gainers

NII Holdings Inc. (NASDAQ:NIHD) shares climbed 7.93 percent to $4.90 in post-market trading. The company announced that it has agreed to sell its Peruvian operations to Empresa Nacional de Telecomunicaciones S.A. for approximately $400 million.

WD-40 Co. (NASDAQ:WDFC) shares climbed 7.50 percent to $56.78 in post-market trading. The company reported second quarter net profit of $0.66 per share, up from $0.65 per share in the same period last year and also topped Reuters' estimate of $0.56 per share.

MAKO Surgical Corp. (NASDAQ:MAKO) shares surged 4.76 percent to $11.00 in post-market trading. The company announced Thursday that it has obtained an Order Granting Permanent Injunction enjoining Blue Belt Technologies Inc. from engaging a former MAKO employee and requiring the destruction of all proprietary MAKO business information in Blue Belt's possession.

Xyratex Ltd. (NASDAQ:XRTX) shares gained 1.90 percent to $10.73 in post-market trading. The company swung to first quarter net loss of $5.1 million or $0.19 per share compared to net profit of $10.9 million or $0.38 per share in the same period last year. Adjusted net loss was $0.13 per share, better than Reuters' estimate of a loss of $0.18 per share.

Repligen Corp. (NASDAQ:RGEN) shares advanced 1.74 percent to $8.20 in post-market trading after climbing more than 10 percent in regular trading. The stock has a 52-week low of $3.72, a 52-week high of $8.09 and $250.76 million in market capitalization.

Losers

F5 Networks Inc. (NASDAQ:FFIV) shares tumbled 15.84 percent to $76.10 in post-market trading. The company currently expects second quarter adjusted net profit to be in a range of $1.06-$1.07 per share, down from its prior estimation of $1.21-$1.24 per share and also below analysts’ estimate of $1.23 per share.

Saba Software Inc. (NASDAQ:SABA) shares slumped 11.64 percent to $6.83 in post-market trading. The company announced that it has determined that it will be unable to regain compliance with the company’s SEC filing requirements for continued listing of its common stock on the NASDAQ global select market by the previously reported Apr. 4, 2013 deadline set by the NASDAQ Stock Market LLC Hearings Panel.

Immersion Corp. (NASDAQ:IMMR) shares plunged 7.07 percent to $10.25 in post-market trading. The stock has a 52-week low of $4.15, a 52-week high of $11.99 and $300.83 million in market capitalization.

PDC Energy Inc. (NASDAQ:PDCE) shares declined 3.75 percent to $44.19 in post-market trading. The stock has a 52-week low of $19.33, a 52-week high of $53.80 and $1.38 billion in market capitalization.

Citrix Systems Inc. (NASDAQ:CTXS) shares fell 3.59 percent to $67.23 in post-market trading. The stock has a 52-week low of $56.57, a 52-week high of $87.99 and $13 billion in market capitalization.

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