Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Oasis Petroleum Inc.
 2. Date of Event Requiring Statement (Month/Day/Year)
09/20/2017		 3. Issuer Name and Ticker or Trading Symbol
Oasis Midstream Partners LP [OMP]
(Last)
(First)
(Middle)
1001 FANNIN STREET, SUITE 1500		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

HOUSTON, TX 77002		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common units representing limited partner interests 0 (1) (2)
I
See footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Oasis Petroleum Inc.
1001 FANNIN STREET, SUITE 1500
HOUSTON, TX 77002		     X    
Oasis Petroleum LLC
1001 FANNIN STREET, SUITE 1500
HOUSTON, TX 77002		     X    
OMS Holdings LLC
1001 FANNIN STREET, SUITE 1500
HOUSTON, TX 77002		     X    

Signatures

/s/ Nickolas J. Lorentzatos, Executive Vice President, General Counsel and Corporate Secretary of Oasis Petroleum Inc. 09/20/2017
**Signature of Reporting Person Date
/s/ Nickolas J. Lorentzatos, Executive Vice President, General Counsel and Corporate Secretary of Oasis Petroleum LLC 09/20/2017
**Signature of Reporting Person Date
/s/ Nickolas J. Lorentzatos, Executive Vice President, General Counsel and Corporate Secretary of OMS Holdings LLC 09/20/2017
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) This Form 3 is being filed in connection with the effectiveness of the Issuer's Registration Statement on Form S-1 (Registration No. 333-217976). As of September 20, 2017, OMS Holdings LLC ("OMS Holdings") owns all of the issued and outstanding limited partner interests in Oasis Midstream Partners LP ("Issuer"), Oasis Petroleum LLC ("Oasis Petroleum") directly owns 100% of the outstanding membership interests in OMS Holdings and Oasis Petroleum Inc. ("OAS") directly owns 100% of the outstanding membership interests in Oasis Petroleum. Accordingly, OAS and Oasis Petroleum may be deemed to be indirect beneficial owners of any securities held by OMS Holdings.
(2) In connection with the closing of the Issuer's initial public offering, all of the previously issued and outstanding limited partner interests of the Issuer held by OMS Holdings will be redeemed and the Issuer will issue to OMS Holdings new common units representing limited partner interests and subordinated units representing limited partner interests.

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