Ranked by oldest companies 1. The Claflin Co. | Year founded: 1817 2. Becton, Dickinson and Co. | Year founded: 1897 3. Amgen Inc. | Year founded: 1980 The complete list is available for purchase online. For information about participating in PBN’s Top Lists, or to make additions or corrections, call (401) 680-4838 or write to Research@PBN.com.
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