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Billionaire With Achy Knees Cashing In on Health Data

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Terry Ragon’s knees ache. Age and love of marathons have taken their toll on the 64-year-old billionaire owner of InterSystems Corp., a Cambridge, Massachusetts, database software company.

Little known outside the niche its technology dominates, InterSystems underpins health-related information for the national health services of England, Scotland and Wales and the U.S. Department of Defense, as well as trading systems at Credit Suisse Group AG and the efforts of the European Space Agency to map the Milky Way.