Among the companies with shares expected to actively trade in Friday's session are PerkinElmer Inc. (PKI), Coinstar Inc. (CSTR) and Expedia Inc. (EXPE).

PerkinElmer's first-quarter profit rose 43% as the manufacturer of health-testing equipment was helped by a benefit from a provision for income taxes, although revenue fell. Shares plunged 14% to $29.68 after hours as results missed the company's own estimates and the company lowered its full-year outlook.

Coinstar's first-quarter profit fell 58% as the company continued to record decelerating growth in its Redbox DVD-rental business and expenses increased. Coinstar also plans to seek approval from shareholders to change its name to Outerwall Inc. Shares jumped 8.2% after hours to $59.53, however, as the company's adjusted earnings topped expectations, though revenue fell short.

Troubles in one of Expedia's most humdrum businesses--car rentals--unexpectedly kept the online travel agent's earnings outlook from lifting off. Shares fell 5.3% to $61.50 after hours. The company reported first-quarter loss widened sharply amid charges related to the online travel agent's acquisition of a majority stake in Europe-focused travel metasearch engine Trivago and other items, however adjusted earnings came in better than expected.

Baidu Inc.'s (BIDU, K3SD.SG) first-quarter earnings increased 8.5% as the Chinese Internet-search company posted double-digit percentage revenue growth, though expenses also increased significantly. American depositary shares fell 8.1% after hours to $84.83.

Software company Informatica Corp.'s (INFA) first-quarter earnings fell 33% as higher operating expenses masked better-than-expected revenue growth. Still, the company's shares climbed 8.8% to $35.14 after-hours Thursday.

George Soros has bought a 7.91% stake in J.C. Penney Co. (JCP), a vote of confidence in the beleaguered, cash-constrained retailer as it tries to reverse a deep decline in sales. Shares were up 7.2% to $16.33 after hours.

LogMeIn Inc. (LOGM) swung to a first-quarter loss as the information-technology company continued to report growing expenses, masking revenue growth. However, shares rose 17% after hours to $20.90 as results beat expectations, and the company raised its full-year view.

Micros Systems Inc.'s (MCRS) fiscal third-quarter earnings rose 9% as the information-technology firm continued to report revenue growth. But shares fell 6.5% in after-hours trading to $40.70 as the company gave a dim forecast for the current quarter, and lowered its full-year view.

Qlik Technologies Inc.'s (QLIK) first-quarter loss widened as the enterprise-software vendor logged significantly higher operating expenses that overshadowed revenue growth. However, shares rose 14% to $27.15 after hours as the company lifted its 2013 outlook.

Synaptics Inc.'s (SYNA) fiscal third-quarter earnings more than tripled as the touchscreen-technology company posted strong revenue growth and income-tax benefits. Shares jumped 18% to $45.55 after hours as results easily topped the company's own projections and it also gave upbeat second-quarter predictions.

Theravance Inc. (THRX) said it plans to create two independent publicly traded companies, separating its late-stage partnered respiratory assets from its biopharmaceutical operations. Shares were up 5.9% to $32.75 after hours.

 
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Altera Corp.'s (ALTR) first-quarter earnings rose 3.8% as the chip maker saw its sales increase, especially in the Americas.

Amazon.com Inc.'s (AMZN) business continues to grow rapidly as more users turn to the Web to do their shopping. But the e-commerce company continues to spend money almost as fast as it comes in. The Internet giant posted a 22% rise in revenue for the first quarter, a slower pace than a year earlier.

CareFusion Corp. (CFN) said it expects to pay about $41 million to resolve allegations stemming from a government investigation into the medical-equipment company's sales and marketing practices for its ChloraPrep skin preparation product and its relationships with health-care professionals.

CBRE Group Inc.'s (CBG) first-quarter profit rose 39% as the commercial real-estate brokerage and investment company posted stronger global property sales and revenue growth in all its major regions.

Cerner Corp.'s (CERN) first-quarter earnings rose 24% as the hospital-information technology vendor reported stronger revenue as stronger support maintenance and services segment sales offset a decline in system sales.

Cirrus Logic Inc.'s (CRUS) fiscal fourth-quarter profit dropped 48% as a large year-earlier tax benefit masked the effect of stronger sales of audio components.

Chubb Corp.'s (CB) first-quarter earnings rose nearly 30% as the property-and-casualty insurer posted higher net premiums written and lower losses.

Clearwire Corp.'s (CLWR) first-quarter loss widened as the financially struggling wireless broadband provider saw its revenue slip and total subscriber rolls fall.

Dresser-Rand Group Inc.'s (DRC) first-quarter earnings rose 39% as the equipment maker reported stronger revenue at both its segments.

Eastman Chemical Co.'s (EMN) first-quarter earnings rose 56% as the chemical and materials manufacturer was helped by a recent acquisition.

Geron Corp. (GERN) unveiled plans to cut its workforce by about a third and discontinue its discovery research and companion diagnostics programs, as the pharmaceutical company looks to focus solely on developing its imetelstat drug for hematologic myeloid malignancies.

HealthSouth Corp.'s (HLS) first-quarter earnings rose 16% as revenue was boosted by continued growth in patient discharges at its rehabilitation facilities.

International Game Technology's (IGT) fiscal second-quarter earnings rose 26% as the slot-machine maker reported improved revenue, led by strong product sales growth. The company also raised its full-year earnings view.

KBR Inc.'s (KBR) first-quarter earnings slipped 3.3% as revenue in the defense contractor's hydrocarbons and government segments weakened.

KLA-Tencor Corp.'s (KLAC) fiscal third-quarter earnings fell 19% as the semiconductor-equipment company was hurt by a double-digit decline in revenue.

Leggett & Platt Inc.'s (LEG) first-quarter earnings rose 12% as the diversified manufacturer reported wider margins, offsetting a modest revenue decline.

Pfizer Inc. (PFE) said an advisory committee to European regulators has recommended against the approval of its new rheumatoid arthritis drug, dealing a setback to the drug giant's plans to bring the drug overseas.

Range Resources Corp.'s (RRC) first-quarter loss widened as the oil and gas company logged charges on hedging and other items, though core earnings and revenue increased.

Reinsurance Group of America Inc.'s (RGA) first-quarter profit rose 50% as the life reinsurer saw its net premiums and investment income rise.

Republic Services Inc.'s (RSG) first-quarter profit slipped 13% as pension-related costs and restructuring charges weighed on the waste-collection and recycling-services company's bottom line and revenue was relatively flat from a year earlier.

Starbucks Corp.'s (SBUX) quarterly profit climbed 26% as the coffee giant attracted more customers with its loyalty program in the U.S. and China.

Taubman Centers Inc.'s (TCO) first-quarter earnings rose 58% as the luxury-mall owner benefited from increased rents and acquisitions.

Universal Health Services Inc.'s (UHS) first-quarter earnings fell 6.8% as the health-care facility operator's increase in expenses slightly outpaced its revenue growth and as special gains boosted year-ago results.

VeriSign Inc.'s (VRSN) first-quarter earnings rose 24% as the Internet-domain-name company reported a wider operating margin.

Wynn Resorts Ltd.'s (WYNN) first-quarter profit rose a better-than-expected 44% as the casino operator reported increased revenue in Macau.

Yahoo Inc. (YHOO) said Chairman Fred Amoroso has resigned but will serve on the Web portal's board through its June annual meeting of shareholders.

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

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