	group has pct of atlantic research atrc a group led by halcyon investments a new york securities and risk arbitrage partnership said it has uired shares of atlantic research corp or pct of the total outstanding common stock in a filing with the securities and exchange commission the halcyon group said it bought the stake for mln dlrs for no specific purpose the group said it has no plans to seek control of atlantic research which has been sought by clabir corp clg but said it may buy more stock or sell some or all of what it has reuter 
