SEC Form 3

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 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* Oasis Investment Holdings LLC (Last) (First) (Middle) 1001 FANNIN STREET SUITE 1500 (Street) HOUSTON TX 77002 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 12/29/2021	3. Issuer Name and Ticker or Trading Symbol Oasis Midstream Partners LP [ OMP ]
		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 of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

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	12,000,000(1)(2)	D

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: 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

1. Name and Address of Reporting Person* Oasis Investment Holdings LLC (Last) (First) (Middle) 1001 FANNIN STREET SUITE 1500 (Street) HOUSTON TX 77002 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Oasis Petroleum North America LLC (Last) (First) (Middle) 1001 FANNIN STREET SUITE 1500 (Street) HOUSTON TX 77002 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. This Form 3 is being jointly filed by Oasis Investment Holdings LLC ("OIH") and Oasis Petroleum North America LLC ("OPNA"). OPNA directly owns 12.7% of the outstanding membership interests in OIH and OMS Holdings LLC ("OMS Holdings") directly owns the remaining 87.3% of the outstanding membership interests in OIH and is the managing member of OIH. Oasis Petroleum LLC ("Oasis Petroleum") directly owns 100% of the outstanding membership interests in each of OMS Holdings and OPNA, and Oasis Petroleum Inc. ("OAS") directly owns 100% of the outstanding membership interests in Oasis Petroleum. Accordingly, OAS, Oasis Petroleum, OMS Holdings and OPNA may be deemed to be indirect beneficial owners of any securities held by OIH.

2. On December 29, 2021, OMS Holdings contributed 12,000,000 common units representing limited partner interests in Oasis Midstream Partners LP to OIH pursuant to that certain Contribution Agreement, dated as of December 29, 2021, by and between OMS Holdings and OIH.

Remarks:

	/s/ Nickolas J. Lorentzatos, Executive Vice President, General Counsel and Corporate Secretary of Oasis Investment Holdings LLC	01/07/2022
	/s/ Nickolas J. Lorentzatos, Executive Vice President, General Counsel and Corporate Secretary of Oasis Petroleum North America LLC	01/07/2022
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.