SEMGROUP CORPORATION

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SemGroup Corporation Announces Management Changes	05/12/19	CI
Timothy R. O'sullivan and Thomas F. Delorbe Determines a Plan to Retire from Their Respective Positions as Vice President - Corporate Planning and Strategic Initiatives and Vice President - Corporate Services, of Semgroup Corporation, Effective December 31, 2018	08/11/18	CI
SemGroup Corporation Announces Executive Changes	21/06/17	CI
SemGroup Announces Executive Changes	21/06/17	CI
SemGroup Corporation Elects William J. McAdam as Director and Nominating and Corporate Governance Committee of the Board	23/03/17	CI
Candice L. Cheeseman to Retire as Vice President and General Counsel of SemGroup Corporation	01/03/17	CI
SemGroup : Announces Retirement of Board Chairman, New Chairman Named	14/12/16	PU
SemGroup Announces Retirement of Board Chairman, New Chairman Named	14/12/16	GL
SemGroup Corporation Announces Board Changes	14/12/16	CI
Peter L. Schwiering Retires as Vice President of SemGroup Corporation	05/08/16	CI
Rose Rock Midstream GP, LLC and SemGroup Corporation Announce Executive Changes	29/02/16	CI
SemGroup Corporation Announces Retirement of Peter L. Schwiering, Vice President	10/02/16	CI
SemGroup Corporation Announces Retirement of Paul F. Largess as Vice President, Chief Accounting Officer and Controller, Effective March 15, 2016	24/09/15	CI
SemGroup Corporation Appoints Carlin G. Conner as President and Chief Executive Officer, Effective April 1, 2014	06/03/14	CI
SemGroup Corporation and Rose Rock Midstream Announce Planned Retirement of President and Chief Executive Officer Norman J. Szydlowski	08/08/13	CI

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