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The Boston Globe

Business

Nuance plan could fend off Carl Icahn

Burlington firm adopts poison pill as billionaire investor raises his stake

With activist investor Carl Icahn bearing down, Nuance Communications Inc. has deployed a new line of defense that could be used to block the billionaire from strengthening his control over the speech recognition powerhouse.

The Burlington-based company behind Dragon software and Siri on the Apple iPhone enacted a plan Tuesday that would effectively prevent any outside investor from gaining 20 percent ownership of the firm.

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