Chord Energy Corp — Director's Dealing 2012

Mar 2, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Oasis Petroleum Inc. (OAS)
CIK: 0001486159
Period of Report: 2012-03-01

Reporting Person: Mace Roy W (Senior VP and CAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-03-01	Common Stock	S	20000	$32.57	Disposed	532092	Direct

Footnotes

F1: The sale reported in this Form 4 was effected pursuant to a rule 10b5-1 trading plan adopted by the reporting person on September 1, 2011.

F2: Represents weighted average price of open market same day purchases. Sales of shares took place at actual prices ranging from $31.96 to $32.94 per share.

F3: Full information regarding the number of shares purchased or sold at each separate price will be provided upon request by the Commission staff, Oasis Petroleum Inc. or an Oasis Petroleum Inc. shareholder.