Home Fairfield Greenwich’s Diamond S Shipping merged with International Seaways FairfieldLatest NewsMergers & AcquisitionsPremium ContentTransportation Greenwich’s Diamond S Shipping merged with International Seaways By Phil Hall - April 1, 2021 SHARE Facebook Twitter The merger creates the second largest U.S.-listed tanker company by vessel count. This content is for Westfair Online members only. Please Sign in / Join to view this content. Become a member by Registering Here.