Citigroup, J.P. Morgan, and US Bancorp are the joint bookrunning managers for the offering. The offering of these securities is being made only by means of a prospectus and related prospectus supplement. Electronic copies of the preliminary prospectus supplement and the accompanying base prospectus, which was filed as part of Cabot’s automatically effective shelf registration statement on Form S-3 filed on August 11, 2016 (File No. 333-213088), may be obtained for free by searching the Securities and Exchange Commission (SEC) online data base (EDGAR) on the SEC web site at http://www.sec.gov. Alternatively, copies of the preliminary prospectus supplement and the accompanying base prospectus relating to the offering may be obtained by contacting Citigroup Global Markets Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717 or by calling toll-free (800) 831-9146; J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue,Edgewood, New York 11717 or by calling (866) 803-9204, or at 383 Madison Avenue, New York, New York 10179, Attention: Investment Grade Syndicate Desk, 3rd Floor or by calling collect at (212) 834-4533; or U.S. Bancorp Investments, Inc., 214 N. Tryon Street, 26th Floor, Charlotte, North Carolina 28202, Attention: Credit Fixed Income or by calling toll-free at (877) 558-2607.

　　This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.