Among the companies with shares expected to actively trade in Wednesday's session are IAC/InterActiveCorp. (IACI), Yelp Inc. (YELP), Buffalo Wild Wings Inc. (BWLD), and Amarin Corp. (AMRN).

IAC/InterActiveCorp.'s third-quarter profit more than doubled as the Internet company recorded stronger revenue, especially from its portfolio of online-dating websites. But shares slid 14% to $50 in after-hours trading, as revenue growth missed Wall Street's expectations.

Yelp posted a wider third-quarter loss while surging marketing costs helped obscure another double-digit revenue increase. Shares of Yelp declined 10% to $61.65 in after-hours trading as the company's earnings came in lower than expected.

Buffalo Wild Wings' third-quarter profit jumped 67% as the restaurant chain reported strong same-store sales and lower costs of traditional chicken wings. Shares jumped 11% to $144 in after-hours trading, as top and bottom line results both exceeded expectations.

Amarin said the U.S. Food and Drug Administration has rescinded a special protocol assessment agreement for a study related to the biotechnology company's supplemental new drug application for its cholesterol drug Vascepa, which an FDA advisory committee voted against earlier this month. Shares tumbled 16% to $1.76 in after-hours trading.

DreamWorks Animation SKG Inc.'s (DWA) third-quarter profit fell 59% as the computer-animation studio's film "Turbo" disappointed. The results, however, didn't decline as much as feared, sending shares up 8.4% to $30.15 after hours.

Western Union Co.'s (WU) third-quarter earnings fell 20% as the money-transfer company recorded a slight drop in revenue and an increase in expenses. The company also said it expects to add "significant additional investment" in compliance-related costs in 2014, in light of the current regulatory environment. Shares fell 14% to $16.55 in after-hours trading.

Shares of Cyan Inc. (CYNI) slumped in after-hours trading Tuesday after the company issued a weaker-than-expected outlook for the fourth quarter. The stock tumbled 12% to $6.90 after hours, as guidance for the current quarter badly missed Wall Street's expectations.

Baidu Inc.'s (BIDU, K3SD.SG) third-quarter profit rose 1.3%, driven by a surge in revenue. American depositary shares of Baidu were up 5.7% to $168.50 in after-hours trading as the company issued upbeat guidance for the fourth quarter.

 
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Aflac Inc.'s (AFL) third-quarter earnings fell 31% as impacts from a weaker yen continued to weigh on its core operations in Japan.

Ameriprise Financial Inc.'s (AMP) third-quarter profit more than doubled as the financial-services company and asset manager posted a double-digit increase in revenue amid growth across all business segments.

Boston Properties Inc.'s (BXP) third-quarter profit more than doubled as the office landlord reported a jump in base rent revenue, while a key metric known as funds from operations jumped.

Caesars Entertainment Corp.'s (CZR) third-quarter loss drastically widened as the casino operator reported sharply higher asset impairment charges and a slight decrease in revenue.

Coldwater Creek Inc. (CWTR) unveiled a cost-cutting plan that the women's apparel retailer said will trim corporate work force expenses by about 20% and include an unspecified number of layoffs at the company.

Edison International's (EIX) third-quarter profit more than doubled due to strength from its core operations.

Flextronics International Ltd.'s (FLEX) fiscal second-quarter profit slipped 21% on higher overhead costs and weaker margins, though the contract electronics manufacturer reported top-line growth for the first time in nearly two years.

Genworth Financial Inc.'s (GNW) third-quarter earnings more than tripled as the life and mortgage insurer's year-ago quarter was weighed down by higher expenses.

Gilead Sciences Inc.'s (GILD) third-quarter earnings rose 17% on strong sales growth led by biopharmaceutical company's newer HIV drugs--Stribild and Complera.

Ixia (XXIA) on Tuesday said it had agreed to buy Net Optics Inc. in a $190 million all-cash deal in a bid to boost its network-monitoring portfolio.

LinkedIn Corp. (LNKD) rode continued growth in its core recruiting business as the professional-networking service extended its string of strong financial results.

PVH Corp. (PVH) unveiled a succession plan for its Tommy Hilfiger division, saying Tuesday that long-term executive Daniel Grieder will take over as the lifestyle and apparel brand's chief executive by January 2015.

Universal Health Services Inc.'s (UHS) third-quarter profit rose 60% as the company's revenue grew and its acute-care facilities were boosted by a favorable Medicaid policy decision in Texas.

WebMD Health Corp.'s (WBMD) swung to a third-quarter profit as advertising demand continued to improve. The health-information provider also agreed to acquire Avado Inc., a developer of cloud-based patient-relationship tools. Financial terms of the deal weren't provided.

Yamana Gold Inc.'s (AUY, YRI.T) third-quarter profit dropped 28% as weaker metals prices and falling revenue again stung the Canada-based gold-mining company's results.

Write to John Kell at john.kell@wsj.com

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