Martin Marietta Corp.’s third-quarter earnings swelled 265%...

Martin Marietta Corp.’s third-quarter earnings swelled 265% from a year ago to $203 million. The results included a one-time, after-tax gain of $135.7 million from the sale of its 68.3% interest in Hoskyns Group PLC, a London-based international computer services company. The firm said a large part of the gain on the Hoskyns sale was offset for tax purposes by an existing capital tax-loss carryforward. Martin Marietta, an aerospace, defense and electronics company, has headquarters in Bethesda, Md.

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