Kona Grill Inc. KONA 0.00% swung to a profit in its first-quarter as the company reported better-than-expected restaurant sales growth. Shares jumped 15% to $7.74 after hours as Kona Grill’s earnings easily topped the company’s estimates and as it issued an upbeat earnings forecast for the current quarter. Kona Grill expects second-quarter earnings of 14 cents a share, above the 10-cent... 

Helen of Troy Corp.’s HELE +4.25% fiscal fourth-quarter earnings rose 20% from a year-earlier period weighed down by impairment charges as the housewares and personal-care products company posted stronger-than-expected revenue, though margins declined. The company also forecast fiscal 2013 earnings of $3.80 to $3.90 a share on revenue of $1.3 billion to $1.33 billion, while analysts surveyed... 

Illumina Inc.’s ILMN -1.04% first-quarter earnings rose 8.6% as the diagnostics company posted a decline in expenses that offset a drop in revenue. The company also announced that its board approved a stock buyback of up to $250 million of its shares. Illumina recently had about 133.9 million shares outstanding. Illumina makes machines that use blood or tissue samples to decode a person’s... 

Pro-Dex Inc. PDEX -5.62% said Chief Executive Mark P. Murphy resigned from all his positions with the company and its subsidiaries Friday, and was immediately replaced by Director Michael J. Berthelot. Pro-Dex develops powered surgical devices and other tools used in the medical, dental, semiconductor and scientific research markets. “We welcome Mike’s leadership in guiding Pro-Dex through... 

SINGAPORE -(MarketWatch)- Singapore conglomerate Keppel Corp. Ltd. said that unit Keppel Energy Pte. Ltd. has entered into a gas sales agreement with Petronas to import an additional 43 million cubic feet per day of natural gas from their various supply networks. In a filing to the Singapore Exchange late Friday, Keppel said that based on historical oil prices, the contract value is estimated to be... 

Extreme Networks Inc. EXTR +1.89% said its fiscal third-quarter results will miss its expectations due to the negative impacts of longer customer sales cycles, sales execution issues and challenging macroeconomic conditions in some regions. Shares slid 13% to $3.74 after hours as the Ethernet-network provider also lowered its full-year guidance. Extreme Networks sees full-year earnings of 22 cents... 

Moody’s Corp. MCO -2.44% has named former Pfizer Inc. PFE -0.51% chairman and chief executive Henry A. McKinnell Jr. as its new chairman, following the rating and analytics company’s decision earlier this year to separate the roles of chairman and CEO. Moody’s also said CEO Raymond McDaniel Jr. will also take on the title of president. McKinnell had served on Moody’s board since... 

Universal Forest Products Inc. UFPI -0.25% swung to a first-quarter profit as the seller of lumber and construction materials saw higher revenue in all its major segments, lead by commercial construction and concrete forming, and manufactured homes. The provider of lumber, building and packaging materials has posted mixed results in recent quarters as it struggled with lagging demand from soft construction... 

Novellus Systems Inc.’s NVLS -1.82% first-quarter earnings fell 54% as revenue continued to decline amid weakness in the semiconductor industry. Novellus is being acquired by Lam Research Corp. LRCX -1.73% in a stock deal that values Novellus at about $3.3 billion. Both companies make products that help design and wire chips for specific functions. Novellus mainly supplies technology that deposits... 

Stryker Corp.’s SYK +1.20% first-quarter earnings rose 14% as the medical-device maker saw sales of its hip and knee replacements increase, providing further evidence that the orthopedic market may be picking up. The company and other orthopedic manufacturers like Biomet Inc. and Zimmer Holdings Inc. (ZMH) have been affected as patients postponed elective surgeries such as hip and knee replacements...