Peter Wilver, Stephen Williamson 

Thermo Fisher Scientific said that CFO Peter Wilver will retire, effective March 31, 2016. The firm's board of directors has named Stephen Williamson, currently VP of financial operations, to become the new CFO, effective Aug. 1, 2015. Wilver joined the firm in 2004 as CFO, and during his tenure the company's market cap grew from $5 billion to around $50 billion today, President and CEO Marc Casper noted in a statement.

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