Among the companies with shares expected to actively trade in Thursday's session are VeriFone Systems Inc. (PAY), Pegasystems Inc. (PEGA) and Rubicon Technology Inc. (RBCN).

VeriFone Systems Inc. (PAY) slashed its estimates for the fiscal first quarter, pointing to weak macro-economic conditions in Europe, delayed projects from several major customers and weakness in South America, while the electronic payments company also forecast disappointing results for the current quarter. Shares plunged 33% to $21.51 after hours.

Pegasystems Inc. (PEGA) swung to a fourth-quarter profit as the business-software company saw strong revenue growth and improved margins. Shares jumped 20% to $30.50 after hours as results beat Wall Street's expectations and the company's full-year outlook easily surpassed estimates.

Rubicon Technology Inc. (RBCN) swung to a fourth-quarter loss as the LED-component supplier's margins weakened. Shares tumbled 8.2% to $5.30 after hours as the company offered first-quarter guidance well below analyst expectations.

Achillion Pharmaceuticals Inc. (ACHN) has commenced an offering of $125 million of its common stock. The drug developer has a market capitalization of about $788 million. Shares sank 7.4% to $8.83 after hours.

Generac Holdings Inc. (GNRC) said funds affiliated with CCMP Capital, its largest shareholder, will offer 10 million shares. The generator manufacturer had about 69.5 million shares outstanding as of Dec. 31. Shares were down 2.9% at $34.90 after hours.

HomeAway Inc. (AWAY) swung to a fourth-quarter profit as the vacation-home rental website's revenue and margins strengthened. Shares jumped 7.8% to $27 after hours Thursday as the company projected full-year revenue above analyst expectations.

Polypore International Inc.'s (PPO) fourth-quarter earnings fell 34% amid weaker demand in its consumer electronics markets and lower-than-expected production of certain electric vehicles that use a high level of its products. Shares fell 5% to $37.95 in after-hours trading, as adjusted earnings and revenue missed expectations.

Synopsys Inc.'s (SNPS) fiscal first-quarter earnings jumped 23% as the chip design software maker recorded an increase in revenue and a smaller income tax provision. Shares jumped 4.9% to $36.50 as core earnings topped Synopsys' expectations and as the company raised its full-year earnings projections and offered upbeat second-quarter guidance.

TAL International Group Inc. (TAL), which leases freight containers, said certain stockholders of the company are offering about four million shares. It had about 33.8 million shares outstanding as of Feb. 1. Shares slipped 4% to $43.80 after hours.

Electric-car maker Tesla Motors Inc. (TSLA) reported a wider fourth-quarter loss and warned of new cost cuts, but said production of its Model S sedan is running at a rate of 20,000 vehicles a year, a key benchmark for investors. Still, the loss was wider than analysts had expected. Shares were down 6.1% to $36.20 after hours.

 
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Boston Beer Co.'s (SAM) fourth-quarter profit fell 5.1% as margins slid and prior-year results included a tax-settlement gain, masking strong demand for Sam Adams seasonal brews and newer products like Angry Orchard ciders.

Cheesecake Factory Inc.'s (CAKE) fourth-quarter profit shrank 26% as its namesake chain faced a decline in customer traffic, in part due to superstorm Sandy. The company's latest results and outlook for the year didn't live up to Wall Street's expectations.

Concho Resources Inc. (CXO) swung to a fourth-quarter profit as derivative gains boosted the oil-and-gas exploration company's results and as production increased.

Energy Transfer Partners L.P.'s (ETP) fourth-quarter earnings rose 49% as the pipeline operator's revenue soared. Meanwhile, Energy Transfer Equity L.P. (ETE) reported its profit declined 43% as interest expenses increased.

Fluor Corp. (FLR) swung to a fourth-quarter loss as the engineering and construction company recorded a significant arbitration charge related to a wind farm project, offsetting improved revenue.

Forest Oil Corp. (FST) swung to a fourth-quarter loss as write-downs and debt-extinguishment costs weighed on the exploration-and-production company's results, though core earnings topped Wall Street's expectations.

High-frequency market-maker Getco Holding Co. and Knight Capital Group Inc. (KCG) unveiled the management team of the new public company expected to form from the merger between the two financial firms.

Healthcare Realty Trust Inc. (HR) swung to a fourth-quarter loss as the real-estate investment trust recorded higher impairment charges and lower real-estate sales gains, masking revenue growth. However, results beat analysts' expectations.

HollyFrontier Corp. (HFC) raised its quarterly dividend 50% and also declared a special cash dividend, the refiner's latest moves to reward shareholders.

Jack in the Box Inc.'s (JACK) fiscal first-quarter earnings rose a better-than-expected 73% as the restaurant operator posted stronger same-store sales and lower expenses.

KBR Inc.'s (KBR) fourth-quarter earnings declined 67% as the company recorded steep revenue declines in its North American government and logistics business and in its minerals business.

Michael Kors Holdings Ltd. (KORS) said a secondary offering of 25 million of its shares priced at $61.50 a piece, in line with its Wednesday close.

Molina Healthcare Inc. (MOH) lowered its full-year earnings guidance by ten cents a share, factoring in an upsized debt offering and projected increases to premium revenue.

Questar Corp.'s (STR) fourth-quarter earnings rose 3.6% as the natural-gas company reported wider margins, offsetting declining revenue in its larger gas segment.

Sherwin-Williams Co. (SHW) has agreed to pay $80 million to settle charges with the Labor Department over transactions related to the company's employee stock-ownership plan.

SM Energy Co.'s (SM) fourth-quarter loss narrowed as the oil-and-gas company increased production and as derivative gains boosted results.

Southwestern Energy Co. (SWN) swung to a fourth-quarter loss as lower natural-gas prices cost the oil-and-gas company a significant impairment charge, although revenue for the latest period beat analysts' expectations.

Semiconductor-packaging company Tessera Technologies Inc. (TSRA) said a court has awarded it more than $130 million in a dispute with Amkor Technology Inc. (AMKR), in addition to about $20 million Amkor already paid to Tessera.

TRW Automotive Holdings Corp. (TRW) said Automotive Investors LLC, an affiliate of the Blackstone Group LP (BX), and certain members of TRW's management plan to offer 10 million shares. The company had 119.3 million shares outstanding as of Feb. 8.

Walter Energy Inc. (WLT, WLT.T) swung to a fourth-quarter loss as lower prices for metallurgical coal hurt the company's results.

Williams Cos.' (WMB) swung to a fourth-quarter profit despite impacts from weaker natural-gas liquids margins as the year-earlier loss stemmed from asset write-downs and other charges related to its former exploration and production business.

Yamana Gold Inc.'s (AUY, YRI.T) fourth-quarter earnings rose 89% as higher production and prices boosted revenue, offsetting increased expenses at the Canada-based mining company.

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

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