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	NNNNN . 016570| 003590|127C|RESTRICTED||4|057-423 COMMON STOCK COMMON STOCK ADD ADD ADD ADD
DESIGNATION MR PO PAR VALUE $0.01 THIS CERTIFICATE IS TRANSFERABLE IN CANTON, MA AND NEW YORK, NY
BOX A 4 3 2 1 SAMPLE 43004, Certificate Shares Number * * 6 0 0 6 2 0 * * * * * * * * * 6 0 0 6 2 0
* * * * * (IF Providence, ZQ 000000 ANY) * * * * 6 0 0 6 2 0 * * * * OASIS PETROLEUM INC. * * * * *
6 0 0 6 2 0 * * * INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE * * * * * * 6 0 0 6 2 0 * *
** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****
Mr. Alexander David Sample **** Mr. Alexander David Sample RI **** Mr. Alexander David Sample ****
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David THIS CERTIFIES THAT Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander 02940
David Sample MR. SAMPLE **** Mr. Alexander David Sample **** Mr. Alexander David &Sample MRS. ****
Mr. Alexander David SAMPLE Sample **** Mr. Alexander David Sample **** Mr. & CUSIP 674215 10 8
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander — MR. SAMPLE & MRS. SAMPLE SEE REVERSE FOR CERTAIN
DEFINITIONS 3004 David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Sample **** Mr. Sample is the owner
of
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res****600620**Shares****600620**Shares****60 * * * SIX HUNDRED THOUSAND
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es****600620**Shares****600620**Shares****600
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*Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares***
*600620**Shares****600620**Shares****600620** SIX HUNDRED AND TWENTY* * *
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00620**Shares****600620**Shares****600620**Sh FULLY-PAID AND NON-ASSESSABLE SHARES OF THE COMMON
STOCK OF Oasis Petroleum Inc. (hereinafter called the “Company”), transferable on the books of the
Company in Total 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890
1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 Certificate DTC Number Insurance
Holder CUSIP person or by duly authorized attorney, upon surrender of this Certificate properly
endorsed. This Certificate and the shares represented hereby, are issued and shall be held subject
to all of the provisions of the Articles of Transaction ID Incorporation, as amended, and the
By-Laws, as amended, of the Company (copies of which are on file with the of Value Numbers Shares
Company and with the Transfer Agent), to all of which each holder, by acceptance hereof, assents.
This Certificate is not valid unless countersigned and registered by the Transfer Agent and
Registrar. Witness the facsimile seal of the Company and the facsimile signatures of its duly
authorized officers. 12345678 DATED <<Month Day, Year>> Num/No 6 5 4 3 2 1 FACSIMILE
SIGNATURE TO COME COUNTERSIGNED AND REGISTERED: COMPUTERSHARE TRUST COMPANY, N.A. 123456789012345 .
President TRANSFER AGENT AND REGISTRAR, Denom XXXXXXXXXX XXXXXX 6 5 4 3 2 1 1,000,000 . 123456
FACSIMILE SIGNATURE TO COME Total 7 6 5 4 3 2 1 .00 XX X By Secretary AUTHORIZED SIGNATURE





 









 





 





OASIS PETROLEUM INC.



THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER WHO SO REQUESTS, A SUMMARY OF THE
POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF
EACH CLASS OF STOCK OF THE COMPANY AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH
PREFERENCES AND RIGHTS, AND THE VARIATIONS IN RIGHTS, PREFERENCES AND LIMITATIONS DETERMINED FOR
EACH SERIES, WHICH ARE FIXED BY THE ARTICLES OF INCORPORATION OF THE COMPANY, AS AMENDED, AND THE
RESOLUTIONS OF THE BOARD OF DIRECTORS OF THE COMPANY, AND THE AUTHORITY OF THE BOARD OF DIRECTORS
TO DETERMINE VARIATIONS FOR FUTURE SERIES. SUCH REQUEST MAY BE MADE TO THE OFFICE OF THE SECRETARY
OF THE COMPANY OR TO THE TRANSFER AGENT. THE BOARD OF DIRECTORS MAY REQUIRE THE OWNER OF A LOST OR
DESTROYED STOCK CERTIFICATE, OR HIS LEGAL REPRESENTATIVES, TO GIVE THE COMPANY A BOND TO INDEMNIFY
IT AND ITS TRANSFER AGENTS AND REGISTRARS AGAINST ANY CLAIM THAT MAY BE MADE AGAINST THEM ON
ACCOUNT OF THE ALLEGED LOSS OR DESTRUCTION OF ANY SUCH CERTIFICATE.








The following abbreviations, when used in the inscription on the face of this certificate, shall be
construed as though they were written out in full according to applicable laws or regulations:




	 	 	 	 	 	 	 

	TEN COM

	 	- as tenants in common
	 	UNIF GIFT MIN ACT -
	 	                 
                     
  Custodian                  
                    
    
	 

	 	 	 	 	 	       
             (Cust)       
                      
              (Minor)
	TEN ENT

	 	- as tenants by the entireties
	 	 	 	under Uniform Gifts to Minors Act            
                        
       
	 

	 	 	 	 	 	                   
                       
                       
        (State)
	JT TEN

	 	- as joint tenants with right of survivorship
	 	UNIF TRF MIN ACT -
	 	                      
          Custodian (until age                   
                 )
	 

	 	 	 	 	 	            (Cust)
	 

	 	 	 	 	 	                
    under Uniform Transfers to Minors Act          
      
	 

	 	 	 	 	 	      (Minor)           
               
               
                         (State)





Additional abbreviations may also be used though not in the above list.








	 	 	 	 

	 

	 	 	PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE
	 

	 	 	 
	For value received,            
                         
    hereby sell, assign and transfer unto
	 	 	 
	 

	 	 	 




 




(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE)



  




 











	 	 	 

	 


	 	Shares
	 


	 	 
	of the common stock represented by the within Certificate, and do hereby irrevocably constitute and appoint
	 	 
	 
	 	Attorney
	 


	 	 
	to transfer the said stock on the books of the within-named Corporation with full power of substitution in the premises.
	 	 






	 	 	 	 	 	 	 	 
	 	 
	 

	 	 	 	 	 	 	 
	Dated: 

	                     
          20       
           
                    
                     
  
	 	 	Signature(s) Guaranteed: Medallion Guarantee Stamp	 
	 

	 	 	 	 	 	THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR
INSTITUTION (Banks, Stockbrokers, Savings and Loan Associations and Credit Unions) WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15.	 
	 

	 	 	 	 	 	 
	 

	 	 	 	 	 	 
	Signature: 
	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 
	Signature: 
	 	 	 	 	 	 
	 

	 	 	 	 	 	 	 
	 

	 	Notice: 	The signature to this assignment must correspond with the name
as written upon the face of the certificate, in every particular,
without alteration or enlargement, or any change whatever.