Specimen Common Stock Certificate of EnergySolutions, Inc.

Exhibit 4.1

COMMON STOCK

ES

Please Select PMS colors

ENERGYSOLUTIONS, INC.

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

COMMON STOCK

CUSIP

See reverse for certain definitions

THIS CERTIFIES THAT

is the owner and registered holder of

FULLY PAID AND NONASSESSABLE SHARES OF COMMON STOCK OF THE PAR VALUE OF $.01 OF

ENERGYSOLUTIONS, INC. transferable only on the books of the Corporation by the holder hereof in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate is not valid unless countersigned by the Transfer Agent and registered by the Registrar.

WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.

Dated:

CORPORATE SECRETARY

PRODUCTION COORDINATOR: TODD DEROSSETT ###-###-#### PROOF OF OCTOBER 12, 2007

ENERGY SOLUTIONS, INC. TSB 28291 FC

Operator: Ron/AP

Rev. 1

AMERICAN BANK NOTE COMPANY

711 ARMSTRONG LANE

COLUMBIA, TENNESSEE 38401 (931)  ###-###-####

SALES: P. SHEERIN ###-###-####

/ ETHER 7 / LIVE JOBS / E / ENERGY SOLUTIONS 28291 FC

ENERGY SOLUTIONS, INC.

CORPORATE SEAL

2006

DELAWARE

PLEASE INITIAL THE APPROPRIATE SELECTION FOR THIS PROOF: OK AS IS OK WITH CHANGES MAKE CHANGES AND SEND ANOTHER PROOF

Colors Selected for Printing: Logo in 4-color process. Please select PMS colors. Intaglio prints in SC-3 Dark Green.

COLOR: This proof was printed from a digital file or artwork on a graphics quality, color laser printer. It is a good representation of the color as it will appear on the final product. However, it is not an exact color rendition, and the final printed product may appear slightly different from the proof due to the difference between the dyes and printing ink.

COUNTERSIGNED AND REGISTERED

COMPUTERSHARE TRUST COMPANY, N.A

TRANSFER AGENT AND REGISTRAR

BY: AUTHORIZED SIGNATURE

CHIEF EXECUTIVE OFFICER

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 TEN ENT – as tenants by the entireties JT TEN – as joint tenants with right of survivorship and not as tenants in common

UNIF GIFT MIN ACT– Custodian

(Cust) (Minor)

under Uniform Gifts to Minors

Act

(State)

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

For value received hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER

IDENTIFYING NUMBER OF ASSIGNEE

PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS OF ASSIGNEE

Shares of the capital 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

NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.

Signature(s) Guaranteed:

THE SIGNATURE(S) MUST 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.

KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, MUTILATED OR DESTROYED, THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE.

AMERICAN BANK NOTE COMPANY PRODUCTION COORDINATOR: TODD DEROSSETT ###-###-#### 711 ARMSTRONG LANE PROOF OF OCTOBER 10, 2007

COLUMBIA, TENNESSEE 38401 ENERGYSOLUTIONS, INC.

(931) 388-3003 TSB 28291 BK

SALES: P. SHEERIN ###-###-#### Operator: Ron

/ ETHER 7 / LIVE JOBS / E / ENERGYSOLUTIONS 28291 BK New

PLEASE INITIAL THE APPROPRIATE SELECTION FOR THIS PROOF: OK AS IS OK WITH CHANGES MAKE CHANGES AND SEND ANOTHER PROOF