NEW YORK (GenomeWeb News) – Following Thermo Fisher Scientific's announcement today that it is buying One Lambda for $925 million, ratings agency Moody's Investors Service downgraded the company's senior unsecured rating and all rated senior unsecured notes.

Thermo Fisher's unsecured senior rating and notes were downgraded one notch to Baa1 from A3. Moody's affirmed the Prime-2 rating on Thermo Fisher's commercial paper program and said that the rating outlook is stable.

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