Among the companies with shares expected to actively trade in Friday's session are Analogic Corp. (ALOG), Werner Enterprises Inc. (WERN) and Neuralstem Inc. (CUR).

Analogic's fiscal fourth-quarter earnings more than doubled, easily topping market expectations, as ultrasound and security-technology sales continued to show strength. Shares jumped 11% to $76.75 after hours.

Werner forecast fiscal third-quarter earnings below analyst expectations, noting its costs are rising faster than its revenue per mile. The trucking company's shares sank 8.3% to $21.70 after hours.

Neuralstem plans to offer an undisclosed number of shares as it seeks to raise funds for general purposes, including research and development, working capital, capital expenditures and clinical trials. The biotechnology company had 54.1 million shares outstanding as of July 31. Shares were down 9.4% to $1.25 after hours.

RealPage Inc. (RP) said certain shareholders are offering four million shares of the software company's stock. RealPage had about 73.7 million shares outstanding at the end of June. Shares dropped 3.3% to $25.15 in after-hours trading.

RDA Microelectronics Inc.'s (RDA) board declared its first special dividend, citing a strong balance sheet and revenue growth. American depositary shares were up 2.1% to $10.45 in light after hours trading.

Hard-disk-drive maker Western Digital Corp. (WDC) cut its revenue outlook for the fiscal first quarter, while at the same time initiating a quarterly dividend and boosting its share buyback authorization by $1.5 billion. Shares fell 1.7% to $41.87 after hours.

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CompuCredit Holdings Corp. (CCRT) said its offer to buy back up to 8.25 million of its shares at a significant premium was oversubscribed.

Covidien PLC (COV) projected annual sales to grow between 3% and 6% in its upcoming fiscal year and said plans to spin off its pharmaceuticals business into a standalone public company were on track.

Delphi Automotive PLC (DLPH) authorized $750 million in share repurchases, as the auto-parts maker looks to increase shareholder returns.

Syswin Inc.'s (SYSW) board has set up a special committee to evaluate the chief executive's proposal to take the Chinese real-estate company private.

Textainer Group Holdings Ltd. (TGH) said an offering of 7.5 million common shares priced at a 1.6% discount to Thursday's closing price.

Valeant Pharmaceuticals International Inc. (VRX) said its president, Rajiv De Silva, will be leaving the company after the close of its acquisition of Medicis Pharmaceutical Corp. (MRX) to pursue other interests.

WageWorks Inc. (WAGE) and certain shareholders are offering a total of around $100 million of WageWorks shares. The company recently had a market capitalization of roughly $460 million, according to FactSet.

Write to Nathalie Tadena at nathalie.tadena@dowjones.com

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