As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

  4/2/18  Alta Mesa Resources, Inc./DE      8-K/A:9      2/9/18    1:46K                                    Donnelley … Solutions/FA 
 2/14/18  Riverstone AMR Partners, L.P.     3          10% Owner²  1:19K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
          Riverstone AMR Partners-T, L.P.
          Riverstone AMR Partners-U, LLC
          Riverstone Energy Partners VI (Non-U.S.), LLC
          Riverstone Management Group, L.L.C.
          Riverstone VI Alta Mesa Holdings, L.P.
          Riverstone/Gower Mgmt Co. Holdings, L.P.
 2/13/18  Leuschen David M                  4          Dir.,%Own.² 1:26K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
          Lapeyre Pierre F Jr.
          Riverstone Energy GP VI Corp.
          Riverstone Energy GP VI, LLC
          Riverstone Energy Partners VI, L.P.
          Riverstone Energy VI Holdings GP, LLC
          Riverstone Holdings LLC
          Riverstone VI Sr II Holdings, L.P.
          Silver Run Sponsor II, LLC
 2/13/18  Chappelle Harlan H.               4          Dir.,Off.²  1:5K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Ellis Michael Edward              4          Officer²    1:5K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Murrell David                     4          Officer²    1:5K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Hackett James T                   4          Dir.,Off.²  2:14K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Smith Ronald Jay                  4          Officer²    1:5K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Cole Homer Gene                   4          Officer²    1:5K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Tepper Jeffrey                    4          Director²   2:15K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  McCabe Michael Anthony            4          Officer²    1:5K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Gutermuth William D.              4          Director²   2:15K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
 2/13/18  Walters Diana J                   4          Director²   2:14K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  Cole Homer Gene                   3          Officer²    2:12K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  Sinclair Donald R.                3          Director²   2:12K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  Dimitrievich Don                  3          Director²   2:12K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  Ellis Michael Edward              3          Dir.,Off.²  2:12K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  Chappelle Harlan H.               3          Dir.,Off.²  2:12K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  McCabe Michael Anthony            3          Officer²    1:3K   Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        
  2/9/18  McMullen William Wallace          3          Director²   2:12K  Alta Mesa Resources, Inc./DE      Toppan Merrill/FA        

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¹	Filing/Form Types:  -K
	3	Initial Statement of Beneficial Ownership of Securities by an Insider — Form 3 { The Filer is an Insider² of the Issuer }.
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.