WALTHAM, Mass.—-Thermo Fisher Scientific Inc. (NYSE: TMO), the world leader in serving science, today announced that it has completed its acquisition of FEI Company, Inc. (NASDAQ: FEIC), the leader in high-performance electron microscopy, for $107.50 per share in cash, or a total purchase price of approximately $4.2 billion. The completion of the transaction follows the receipt of all required regulatory approvals. The business will become part of Thermo Fisher’s Analytical Instruments Segment.

“We are pleased to complete this transaction and officially welcome our new colleagues from FEI to Thermo Fisher,” said Marc N. Casper, president and chief executive officer of Thermo Fisher Scientific. “With FEI’s leading electron microscopy platform, we’re now in an even stronger position to help our life sciences customers accelerate advancements in structural biology. FEI’s products also create new opportunities for us to serve customers in materials science markets that increasingly rely on nanotechnolog