Update (4:06 p.m.): Updated with Monday closing price.

NEW YORK (TheStreet) -- InterMune  (ITMN) soared to a 52-week high of $73.19 on Monday after Swiss-based company Roche Holding announced it would buy the biotechnology company for $8.3 billion.

Roche will pay $74 a share, which represents a 38% premium to Friday's closing price of $53.80, in an all-cash deal.

For more on this story, read TheStreet's Adam Feuerstein's article here.

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The stock closed up 35.41% to $72.85. More than 51 million shares, compared to the average volume of 2,075,640.

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