ARM Holdings, LSE Group, Petroceltic: U.K., Irish Equity Preview

The following is a list of companies that may have unusual share-price changes in U.K. and Irish markets. Stock symbols are in parentheses and prices are from the last market close.

Futures on the benchmark FTSE 100 Index rose 0.5 percent to 5,956 at 7:37 a.m. in London. The gauge retreated 31.04, or 0.5 percent, to 5,944.96 yesterday. The FTSE All-Share Index fell 0.5 percent to 3,097.62, while Ireland’s ISEQ declined 0.8 percent to 3,002.31.

ARM Holdings Plc (ARM LN): Chairman Doug Dunn will step down no later than the annual shareholder meeting in 2012, the U.K. designer of chips that help power Apple Inc.’s iPhone said. The shares retreated 1.2 percent to 590.5 pence.

HMV Group Plc (HMV LN): The U.K. retailer of books, music and DVDs has received more than one offer for its bookstore chain, Waterstone’s, following talks with as many as 10 potential bidders, possibly including Change Capital Partners LLP, Sky News reported, without citing anyone. The shares were unchanged at 10 pence.

London Stock Exchange Group Plc (LSE LN): The London exchange said net income for the 12 months ended March 2011 rose to 151.6 million pounds ($247 million) from 90.4 million pounds a year earlier, the exchange said in a Regulatory News Service statement today. That beat the 145 million-pound average estimate of six analysts compiled by Bloomberg. The shares slipped 1.5 percent to 819 pence.

Petroceltic International Plc (PCI ID): The Dublin-based oil and gas explorer said it raised about $60 million through a placing of new ordinary shares. The shares jumped 5.4 percent to 13.2 euro cents.

Spectris Plc (SXS LN): The company said four-month sales climbed 25 percent, boosted by an acquisition and growing demand in China and North America. The shares slid 1.1 percent to 1,491 pence.

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