Among the companies with shares expected to actively trade in Thursday's session are First Solar Inc. (FSLR), Green Mountain Coffee Roasters Inc. (GMCR) and Halozyme Therapeutics Inc. (HALO).

First Solar said it will boost production to meet rising demand, despite a glut in the global solar-panel market, and the company's second-quarter profit jumped 82%. Shares soared 18.9% to $17.60 after hours as results topped analyst expectations by a wide margin and as the company raised its full-year guidance.

Green Mountain's fiscal third-quarter income rose 30%, as the company posted stronger sales of its K-cup coffee and tea portion packs, but margins continued to contract over softer-than-anticipated demand. Shares rose 12.6% to $20.18 after hours as the company outlined a plan to better predict sales, an area where it had fallen short in the past.

Baxter International Inc. (BAX) confirmed receiving a complete response letter from the U.S. Food and Drug Administration related to its investigational product HyQ, which is in development with Halozyme, after saying in April the agency was seeking additional information. Halo shares sank 55% to $3.88 after hours.

Abercrombie & Fitch Co. (ANF) projected sharply disappointing earnings for the fiscal second quarter and lowered its outlook for the year based on softer-than-expected sales trends, while the teen-apparel retailer also said it intends to slow its new store openings. Shares sank 16% to $28.52 after hours.

Avis Budget Group Inc.'s (CAR) second-quarter profit rose 52% as the car-rental company's top line jumped sharply, aided by the acquisition of Avis Europe and stronger domestic volume. Shares jumped 6.4% to $15 after hours as the company's adjusted profit sharply topped Wall Street's expectations, though sales growth was a bit lighter than forecast.

American Eagle Outfitters Inc. (AEO) raised its second-quarter earnings outlook, citing stronger-than-expected sales as it reined in discounts. Shares were up 6.4% to $21.63 after hours.

LivePerson Inc.'s (LPSN) second-quarter earnings dropped 94% as accounting and legal costs weighed on the company's bottom-line results. Shares fell 6% to $16.86 after hours as the company also lowered its full-year guidance.

Solta Medical Inc. (SLTM) plans to offer an undisclosed number of shares, as it seeks to raise funds for general corporate purposes. Shares were off 6% to $3 after hours.

Tesoro Corp.'s (TSO) second-quarter earnings improved 78% as the independent refiner's gross refining margin improved and its expenses decreased. Results beat Wall Street expectations, and shares jumped 4.6% to $29.10 after hours.

Trimble Navigation Ltd. (TRMB) reported second-quarter earnings that were flat from a year earlier as expenses rose, but the global-positioning-system company reported better-than-expected revenue growth and core profits. Shares rose 6.5% to $47.50 after hours as the company offered upbeat guidance for the current quarter.

United Online Inc. (UNTD) said its board approved a preliminary plan to split the company into two independent, publicly traded firms, spinning off its much larger flowers business about four years after acquiring it. Shares were up 7.1% to $4.50 after hours.

Weight Watchers International Inc.'s (WTW) second-quarter earnings fell 11% as the provider of weight-loss services reported that revenue growth at its Internet business largely was offset by lower sales at its meeting business in North America and the U.K. Shares fell 13% to $42.51 after-hours trading as revenue missed expectations and the company cut its 2012 earnings guidance.

Yelp Inc.'s (YELP) second-quarter loss widened as the local-reviews website saw surging expenses continue to outpace better-than-expected revenue. Shares jumped 14.7% to $21.60 after hours after the company boosted its full-year guidance and posted an upbeat forecast for third-quarter revenue.

Zumiez Inc.'s (ZUMZ) July same-store sales grew 7.5%, but fell short of Street expectations. Shares were off 11% to $31.89 after hours.

    Watchlist: 

Boardwalk Pipeline Partners L.P. (BWP) intends to offer 10.5 million shares, planning to use the proceeds to pay down debt and for other general corporate purposes.

CC Media Holdings Inc.'s (CCMO) second-quarter loss narrowed as operating expenses slipped, while sister company Clear Channel Outdoor Holdings Inc. (CCO) swung to a loss for the period.

Essex Property Trust Inc.'s (ESS) second-quarter profit more than tripled as the West Coast apartment owner continued to benefit from acquisitions and rent increases in California and Seattle.

Federal Realty Investment Trust's (FRT) second-quarter earnings fell 6.2% as the shopping center-focused company was hurt by higher costs.

General Growth Properties Inc.'s (GGP) second-quarter loss narrowed as the mall landlord saw improvements in revenue and a key measure of performance.

Hartford Financial Services Group Inc. (HIG) swung to a second-quarter loss amid $587 million in charges related to the retirement of debt it had issued to a German insurer.

Lincoln National Corp.'s (LNC) second-quarter earnings rose 6.6% as the life-insurance and annuity company posted stronger results in its annuity business.

MetLife Inc.'s (MET) second-quarter earnings more than doubled as the life insurer reported its gains from derivatives soared, and its operating profit improved modestly.

MDU Resources Group Inc.'s (MDU) second-quarter earnings rose 20% as the reversal of an arbitration charge boosted the oil and natural-gas producer's bottom-line results and as revenue improved.

Murphy Oil Corp.'s (MUR) second-quarter earnings fell 5.2% as the oil-and-gas producer saw oil and natural gas prices drop, weakening the company's revenue.

Moody's lowered Navistar International Corp.'s (NAV) rating one notch further into junk territory, noting the truck maker faces several challenges as it begins to employ a pollution-reduction method for its engines that is already used by the rest of the industry.

Second-quarter results from Prudential Financial Inc. (PRU) missed analyst estimates on Wednesday as profit at its U.S. operations declined.

SM Energy Co.'s (SM) second-quarter profit fell 80% as the oil-and-gas company's operating expenses rose and revenue fell.

Toyota Motor Corp. (TM, 7203.TO) is recalling certain models of its RAV4 sports-utility vehicles and Lexus sedans, saying a problem with the rear suspension arm poses a potential safety risk.

Transocean Ltd. (RIG, RIGN.VX) swung to a second-quarter loss as contingencies for the Deepwater Horizon oil spill in the U.S. Gulf of Mexico weighed on the offshore oil-driller's results, though revenue improved.

Unum Group's (UNM) second-quarter earnings fell 4.9% as the insurer continued to report declining profits from its U.K. business.

Walter Energy Inc.'s (WLT, WLT.T) second-quarter profit fell 72% as the coal producer was affected by lower selling prices, though sales of steelmaking coal grew.

Williams Cos.'s (WMB) second-quarter earnings fell 42%, while midstream and interstate gas-pipeline asset-holder Williams Partners LP's (WPZ) profit decreased 43%--the latest companies to feel the effects of weaker natural-gas-liquids margins.

Willis Group Holdings PLC's (WSH) second-quarter earnings rose 27% on fewer charges and a special gain, masking a decline in revenue.

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

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