Exhibit 4.1

Resource Development COMMON STOCK CUSIPINCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARETHIS CERTIFIES THATIS THE REGISTERED HOLDER OFFULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, $0.01 PAR VALUE PER SHARE OFWILD HORSE RESOURCE DEVELOPMENT CORPORATIONtransferable on the books of the Corporation in person or by duly authorized attorney upon surrender of the Certificateproperly endorsed.This Certificate is not valid unless countersigned by the Transfer Agent and registered by the Registrar.WITNESS, the facsimile signature of the Corporation’s duly authorized officers.Dated:Jay C. Graham, Chief Executive Officer [SEAL] Anthony Bahr, President

1(.,., ············ .·.·.·-·.-.·.·.·.·.·.·.-.··.·.w·.·.·.-.-.·.-.-.-.-.-.-.·.-.·.·.-. .·.·.··.··.·.·.·.w .·•.-.·.-.w.-• .-.-.• . .-•.-.·.·.-.·.·”’”·”•”•””•”“w.w.-.-.·.·.-.w. ·.·.·.-.-. .-.·.w.v•.• . w.w.-.The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they werewritten out in full according to applicable laws or regulations:TEN COM—as tenants in commonTEN ENT—as tenants by the entiretiesIT TEN—as joint tenants with right of survivorshipand not as tenants in commonUNIF GIFT MIN ACT———Custodian,             (Cust) (Minor)under Uniform Gifts to MinorsAct             (State)Additional abbreviations may also be used though not in the above list.For value received,——————————hereby sell, assign and transfer untoPLEASE INSERT SOCIAL SECURITY OR OTHERIDENTIFYING NUMBER OF ASSIGNEEPLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE—————————————————————- Sharesof the Common Stock represented by the within Certificate, and do hereby irrevocably constitute and appointto- tr-ans-fer- th-e C-om-mo-n -Sto-ck- on- th-e b-ook-s o-f t-he -wit-hin- na-me-d -Co-rpo-rat-ion- wi-th -ful-l po-we-r o-f s-ubs-tit-utio-n -in t-he- pre-mi-ses-. AttorneyDated————-Signature(s) Guaranteed:XXNOTICE: THE SIGNATURE(S) TO TillS ASSIGNMENT MUSTCORRESPOND WITH THE NAME(S) AS WRITTEN UPON THEFACE OF THE CERTIFICATE IN EVERY PARTICULAR,WITHOUT ALTERATION OR ENLARGEMENT OR ANYCHANGE WHATEVER.THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGffiLEGUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGSAND LOAN ASSOCIATIONS AND CREDIT UNIONS WITHMEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEEMEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17 Ad-15.