Oncor Inc. said Friday that underwriters Smith Barney, HarrisUpham & Co. Inc. and Vector Securities International Inc. haveexercised their 450,000-share overallotment option at $10.50per share, raising an additional $4.7 million. In January, thecompany raised $31.5 million through the sale of 3 millionshares (NASDAQ:ONCR). Stock of the Gaithersburg, Md.,company, a developer of DNA probe test systems and relatedproducts for cancer and genetic diseases, gained 25 cents onFriday to $12.63.

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