NEW YORK, May 23 (Reuters) - Dollar Tree Inc : * Shares up 2.2 percent in premarket trade after results

* Buys EKOS Corp, Nordion unit for combined initial $380 mln

* Royalty cuts acceptance threshold from 90 pct previously

May 23 (Reuters) - Johnson & Johnson said on Thursday that it plans to submit more than 10 new products for regulatory approval by 2017, including drugs to treat hepatitis C, immune diseases, and schizophrenia as well as vaccines for flu, rabies and polio.

May 22 (Reuters) - Discount retailer Dollar Tree Inc reported a 15 percent rise in first-quarter profit as margins expanded.

RIO DE JANEIRO, May 23 (Reuters) - Brazil plans to hold an auction for rights to explore some of its most promising offshore oil and natural gas areas in October, one month earlier than expected.

* EU regulatory chief wants country-by-country tax reporting

OSX Brasil SA, the shipyard and ship leasing company controlled by Brazilian billionaire Eike Batista, fired 300 employees as part of an effort to cut costs, O Estado de S. Paulo said on Thursday. According to Estado, which did not cite anyone as the source for the information, the company decided to slow down construction of a shipyard until receiving new orders.

* Incurred non-recurring costs of $9 mln on Skippy acquisition

* Futures off: Dow 103 pts, S&P 13.4 pts, Nasdaq 24.75 pts

CHICAGO, May 23 (Reuters) - Kathrin Jansen is a microbiologist with at least two breakthrough vaccines to her name: she brought the cervical cancer vaccine Gardasil to market for Merck and helped develop the $4 billion a year pneumonia and meningitis vaccine Prevnar 13 for Pfizer.

May 23 (Reuters) - American International Group Inc's board is looking for a new director with regulatory experience, as the insurer readies for the government to classify it as big enough to merit greater scrutiny, according to two sources familiar with the situation.

* Delta's Trainer refinery could take 50,000 bpd of Bakken crude by end year

NEW YORK, May 23 (Reuters) - Hospital companies that tie up with top medical research facilities to improve their access to the latest treatments and bolster their reputations are increasingly finding the partnerships also make it easier for them to do takeovers.

May 23 (Reuters) - Hormel Foods Corp reported a lower quarterly profit due to costs related to its Skippy acquisition, and higher grain costs and lower turkey meat prices at its Jennie-O Turkey stores.

TORONTO, May 23 (Reuters) - Toronto-Dominion Bank's quarterly profit rose 2 percent, driven by stronger wholesale banking income, the bank said on Thursday.

HELSINKI/LONDON, May 23 (Reuters) - GlaxoSmithKline Plc's H1N1 pandemic flu shot may put adults at higher risk of developing narcolepsy, not only children as previous studies found, Finland's National Institute for Health and Welfare said on Thursday.

* HSBC China flash PMI falls to seven-month low of 49.6 * Worries of early end to bond buying also hurt sentiment * Coming Up; U.S. jobless claims 1230 GMT By Eric Onstad LONDON, May 23 (Reuters) - Copper reversed the week's gains, sliding as much as 3 percent on Thursday after a survey showed China's manufacturing sector contracted, but a shutdown at one of the world's biggest mines in Indonesia helped cap losses. Other industrial metals such as aluminium and nickel also f

* Asian shares down after China HSBC flash PMI, credit spreads wider

BRUSSELS, May 23 (Reuters) - EU antitrust regulators accepted on Thursday concessions from Lufthansa, United Airlines, Air Canada and Continental to ease competition concerns about their transatlantic revenue-sharing pact.

* EBIT falls 18 pct to 23.2 mln euros, missing poll average

May 23 (Reuters) - (The following statement was released by the rating agency)

THOMSON REUTERS, Diary of Non S&P 500 Corporate earnings for U.S. companies from May 23, 2013. S&P 500 Earnings - Monthly S&P 500 Earnings - Day Ahead S&P 500 Earnings - Weekly Non S&P 500 - Day Ahead ConferenceCall/Webcast - Weekly ConferenceCall/Webcast - Day Meetings - Weekly Meetings - Day Ahead Economic Indicators IPO events Dividends

HONG KONG, May 23 (Reuters) - Lenovo Group Ltd's bold acquisitions in its flagship PC business, a foray into mobile gadgets, and a relatively light debt load are setting it apart from PC rivals as industry shipments take their steepest fall in decades.

May 23 (Reuters) - (The following statement was released by the rating agency)

* Asian shares down after China HSBC flash PMI, credit spreads wider

BRUSSELS, May 23 (Reuters) - EU regulators will announce on Thursday their acceptance of proposals by Lufthansa, United Airlines, Continental and Air Canada to free up airport slots to end an antitrust case, a source familiar with the matter said.

TOKYO, May 23 (Reuters) - Japan's Nikkei index stock futures briefly dropped below 14,000 in after-hours trade, indicating possibly a further decline in the cash market on Friday after a 7.3-percent dive on Thursday.

PARIS, May 23 (Reuters) - The Euro STOXX 50 Volatility Index surged 18 percent to a 3-week high on Thursday, as weak Chinese macro data and worries the U.S. Federal Reserve could soon trim its stimulus measures dented investors' appetite for risk.