UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
PURSUANT TO SECTION 12(b) OR 12(g) OF THE
SECURITIES EXCHANGE ACT OF 1934

OASIS PETROLEUM INC.

(Exact Name of Registrant as Specified in its Charter)

Delaware	80-0554627
(State of incorporation or organization)	(IRS Employer Identification No.)
1001 Fannin Street, Suite 1500 Houston, Texas	77002
(Address of principal executive offices)	(Zip Code)
Securities to be registered pursuant to Section 12(b) of the Act:
Title of each class to be so registered	Name of each exchange on which Each class is to be registered
Common Stock, par value $0.01 per share	The Nasdaq Stock Market LLC

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or (e), check the following box. þ

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A(d) or (e), check the following box. o

If this form relates to the registration of a class of securities concurrently with a Regulation A offering, check the following box. o

Securities Act registration statement or Regulation A offering statement file number to which this form relates: (if applicable)

Securities to be registered pursuant to Section 12(g) of the Act: None.

INFORMATION REQUIRED IN REGISTRATION STATEMENT

Item 1. Description of Registrant’s Securities to be Registered.

The classes of securities to be registered hereby are the common stock, par value $0.01 per share (the “Common Stock”), of Oasis Petroleum Inc., a Delaware corporation (the “Registrant”).

A description of the Common Stock is set forth under the caption “Description of Capital Stock” in the prospectus filed by the Registrant pursuant to Rule 424(b) under the Securities Act of 1933, as amended, which prospectus constitutes a part of the Registrant’s Registration Statement on Form S-3 (Registration No. 333-219303) filed with the Securities and Exchange Commission on July 14, 2017. Such prospectus, in the form in which it is so filed, shall be deemed to be incorporated herein by reference.

Item 2. Exhibits.

In accordance with the “Instructions as to Exhibits” with respect to Form 8-A, no exhibits are required to be filed as part of this registration statement because no other securities of the registrant are registered on The Nasdaq Stock Market LLC and the securities registered hereby are not being registered pursuant to Section 12(g) of the Securities Exchange Act of 1934, as amended.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereto duly authorized.

Oasis Petroleum Inc.
By:	/s/ Nickolas J. Lorentzatos
	Name: Nickolas J. Lorentzatos
	Title: Executive Vice President, General Counsel and Corporate Secretary

Date: December 23, 2019