=============================================================================
                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                                 SCHEDULE 13D
                Under the Securities and Exchange Act of 1934



                            Energy Solutions, Inc.
               ------------------------------------------------
                               (Name of Issuer)

                    Common Stock, $0.01 par value per share
                ------------------------------------------------
                        (Title of Class of Securities)

                                  292756202
                ------------------------------------------------
                               (CUSIP Number)

                           Allison Bennington, Esq.
                              ValueAct Capital
                       435 Pacific Avenue, Fourth Floor
                          San Francisco, CA  94133
                               (415) 362-3700
                ------------------------------------------------
                 (Name, address and telephone number of Person
                Authorized to Receive Notices and Communications)

                           Allison Bennington, Esq.
                              ValueAct Capital
                       435 Pacific Avenue, Fourth Floor
                          San Francisco, CA  94133
                               (415) 362-3700

                               March 19, 2010
                ------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box [ ].

Note:  Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 240.13d-7 for other
parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

This information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).
=============================================================================


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 2 of 21
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Capital Master Fund, L.P.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS (See Instructions)*

   WC*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   British Virgin Islands
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         1,014,906**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,014,906**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,014,906**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

   1.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5




                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 3 of 21
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   VA Partners I, LLC
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         1,014,906**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,014,906**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,014,906**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    1.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    00 (LLC)
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5



                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 4 of 21
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Capital Management, L.P.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         1,014,906**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,014,906**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,014,906**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    1.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 5 of 21
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Capital Management, LLC
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         1,014,906**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,014,906**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,014,906**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    1.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    00 (LLC)
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 6 of 21
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Holdings, L.P.
---------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

---------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         1,014,906**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,014,906**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,014,906**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    1.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Items 2 and 5


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 7 of 21
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Holdings GP, LLC
---------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                        [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                   7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES          8.  SHARED VOTING POWER
   BENEFICIALLY        1,014,906**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH     9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,014,906**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,014,906**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    1.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    00 (LLC)
-----------------------------------------------------------------------------
*See Item 3
**See Items 2 and 5





                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 8 of 21
-----------------------------------------------------------------------------

1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct SmallCap Master Fund, L.P.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS (See Instructions)*

   WC*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   British Virgin Islands
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         4,627,943**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        4,627,943**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    4,627,943**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

   5.2%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5




                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 9 of 21
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   VA SmallCap Partners, LLC
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                 (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         4,627,943**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        4,627,943**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    4,627,943**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [x]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    5.2%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    00 (LLC)
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5




                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 10 of 21
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct SmallCap Management, L.P.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [x]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         4,627,943**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        4,627,943**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    4,627,943**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [x]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    5.2%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5




                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 11 of 21
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct SmallCap Management, LLC
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         4,627,943**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        4,627,943**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    4,627,943**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [x]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    5.2%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    00 (LLC)
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5




                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 12 of 21
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   David Lockwood
---------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP**                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

---------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         4,627,943**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        4,627,943**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    4,627,943**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [x]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    5.2%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    IN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5




--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 13 of 21
-----------------------------------------------------------------------------
Item 1.     Security and Issuer

       This Schedule 13D relates to the Common Stock, $0.01 par value per
share (the "Common Stock"), of Energy Solutions, Inc., a Delaware corporation
(the "Issuer").  The address of the principal executive offices of the Issuer
is 423 West 300 South, Suite 200, Salt Lake City, Utah 84101.

Item 2.     Identity and Background

      This statement is filed jointly by (a) ValueAct Capital Master Fund,
L.P. ("ValueAct Master Fund"),(b) VA Partners I, LLC ("VA Partners I"),(c)
ValueAct Capital Management, L.P. ("ValueAct Management L.P."),(d) ValueAct
Capital Management, LLC ("ValueAct Management LLC"),(e)ValueAct Holdings,
L.P. ("ValueAct Holdings"),(f)ValueAct Holdings GP, LLC ("ValueAct Holdings
GP"), (g) ValueAct SmallCap Master Fund, L.P. ("ValueAct SmallCap Master
Fund"), (h) VA SmallCap Partners, LLC ("VA SmallCap Partners"),(i)ValueAct
SmallCap Management, L.P. ("ValueAct SmallCap Management"), (j) ValueAct
SmallCap Management, LLC and (k) David Lockwood (collectively, the "Reporting
Persons").

       ValueAct Master Fund is a limited partnership organized under the laws
of the British Virgin Islands.  It has a principal business address of 435
Pacific Avenue, Fourth Floor, San Francisco, CA 94133.

        VA Partners I is a Delaware limited liability company, the principal
business of which is to serve as the General Partner to ValueAct Master Fund.
It has a principal business address of 435 Pacific Avenue, Fourth Floor, San
Francisco, CA 94133.

        ValueAct Management L.P. is a Delaware limited partnership which
renders management services to ValueAct Master Fund.  ValueAct Management LLC
is a Delaware limited liability company, the principal business of which is
to serve as the General Partner to ValueAct Management L.P.  Each has a
principal business address of 435 Pacific Avenue, Fourth Floor, San
Francisco, CA 94133.

       ValueAct Holdings is a Delaware limited partnership and is the sole
owner of  the limited partnership interests of ValueAct Management L.P. and
the membership interests of ValueAct Management LLC and is the majority owner
of the membership interests of VA Partners I.  ValueAct Holdings GP is a
Delaware limited liability company, the principal business of which is to
serve as the General Partner to ValueAct Holdings.  Each has a principal
business address of 435 Pacific Avenue, Fourth Floor, San Francisco, CA
94133.

     ValueAct SmallCap Master Fund is a limited partnership organized
under the laws of the British Virgin Islands.  It has a principal business
address of 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133.

       VA SmallCap Partners is a Delaware limited liability company, the
principal business of which is to serve as the General Partner to ValueAct
SmallCap Master Fund.  It has a principal business address of 435 Pacific
Avenue, Fourth Floor, San Francisco, CA 94133.




--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 14 of 21
-----------------------------------------------------------------------------
      ValueAct SmallCap Management is a Delaware limited partnership which
renders management services to ValueAct SmallCap Master Fund.  ValueAct
SmallCap Management, LLC is a Delaware limited liability company, the
principal business of which is to serve as the General Partner to ValueAct
SmallCap Management.  Each has a principal business address of 435 Pacific
Avenue, Fourth Floor, San Francisco, CA 94133.

       (a), (b) and (c).  David Lockwood is the managing member, principal
owner and controlling person of VA SmallCap Partners and ValueAct SmallCap
Management LLC, and such activities constitute his principal occupation.  He
is referred to herein as the "Managing Member".  The Managing Member is a
United States citizen and has a principal business address of 435 Pacific
Avenue, Fourth Floor, San Francisco, CA 94133.

       (d) and (e). None of the entities or persons identified in this Item 2
has during the past five years been convicted of any criminal proceeding
(excluding traffic violations or similar misdemeanors), nor been a party to a
civil proceeding of a judicial or administrative body of competent judgment,
decree or final order enjoining future violations of, or prohibiting or
mandating activities subject to, federal or state securities laws or finding
any violation with respect to such laws.

Item 3.     Source and Amount of Funds or Other Consideration

     The source of funds used for the purchase of the Issuer's securities
was the working capital of ValueAct Master Fund and ValueAct SmallCap Master
Fund. The aggregate funds used by these Reporting Persons to make the
purchases were $6,126,998.96 and $6,573,783.69.

Item 4.     Purpose of Transaction

      The Reporting Persons have acquired the Issuer's Common Stock for
investment purposes, and such purchases have been made in the Reporting
Persons' ordinary course of business.

     In pursuing such investment purposes, the Reporting Persons may further
purchase, hold, vote, trade, dispose or otherwise deal in the Common Stock at
times, and in such manner, as they deem advisable to benefit from changes in
market prices of such Common Stock, changes in the Issuer's operations,
business strategy or prospects, or from sale or merger of the Issuer.  To
evaluate such alternatives, the Reporting Persons will routinely monitor the
Issuer's operations, prospects, business development, management, competitive
and strategic matters, capital structure, and prevailing market conditions,
as well as alternative investment opportunities, liquidity requirements of
the Reporting Persons and other investment considerations.  Consistent with
its investment research methods and evaluation criteria, the Reporting
Persons may discuss such matters with management or directors of the Issuer,
other shareholders, industry analysts, existing or potential strategic
partners or competitors, investment and financing professionals, sources of
credit and other investors.  Such factors and discussions may materially
affect, and result in, the Reporting Persons' modifying their ownership of
Common Stock, exchanging information with the Issuer pursuant to appropriate
confidentiality or similar agreements, proposing changes in the Issuer's
operations, governance or capitalization, or in proposing one or more of the
other actions described in subsections (a) through (j) of Item 4 of Schedule
13D.

--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 15 of 21
-----------------------------------------------------------------------------

      The Reporting Persons reserve the right to formulate other plans and/or
make other proposals, and take such actions with respect to their investment
in the Issuer, including any or all of the actions set forth in paragraphs
(a) through (j) of Item 4 of Schedule 13D, or acquire additional Common Stock
or dispose of all the Common Stock beneficially owned by them, in the public
market or privately negotiated transactions.  The Reporting Persons may at
any time reconsider and change their plans or proposals relating to the
foregoing.

Item 5.    Interest in Securities of the Issuer

     (a) and (b).  Set forth below is the beneficial ownership of shares of
Common Stock of the Issuer for each person named in Item 2.

       1,014,906 shares directly owned by ValueAct Master Fund are also
reported as beneficially owned by (i) ValueAct Management L.P. as the manager
of the investment partnership, (ii) ValueAct Management LLC, as General
Partner of ValueAct Management L.P., (iii) ValueAct Holdings, as the sole
owner of the limited partnership interests of ValueAct Management L.P. and
the membership interests of ValueAct Management LLC and as the majority owner
of the membership interests of VA Partners I, (iv) ValueAct Holdings GP, as
General Partner of ValueAct Holdings and (v) VA Partners I, as General
Partner of ValueAct Master Fund (collectively, the "ValueAct Master Fund
Reporting Persons").  VA Partners I, ValueAct Management L.P., ValueAct
Management LLC, ValueAct Holdings and ValueAct Holdings GP also, directly or
indirectly, may own interests in one or more than one of the partnerships
from time to time.  Unless otherwise indicated below, by reason of such
relationships ValueAct Master Fund is reported as having shared power to
vote or to direct the vote, and shared power to dispose or direct the
disposition of, such shares of Common Stock, with the other ValueAct Master
Fund Reporting Persons.

       4,627,943 shares directly owned by ValueAct SmallCap Master Fund are
also reported as beneficially owned by (i) ValueAct SmallCap Management as
the manager of such investment partnership, (ii) ValueAct SmallCap Management
LLC, as General Partner of ValueAct SmallCap Management, (iii) the Managing
Member, as a controlling person of VA SmallCap Partners and ValueAct SmallCap
Management LLC and (iv) VA SmallCap Partners, as General Partner of ValueAct
SmallCap Master Fund (collectively, the "ValueAct SmallCap Reporting
Persons").  VA SmallCap Partners, ValueAct SmallCap Management,LLC and the
Managing Member also, directly or indirectly, may own interests in one or
more than one of the partnerships from time to time.  Unless otherwise
indicated below, by reason of such relationships ValueAct SmallCap Master
Fund is reported as having shared power to vote or to direct the vote, and
shared power to dispose or direct the disposition of, such shares of Common
Stock, with the other ValueAct SmallCap Reporting Persons.

      As of the date hereof, ValueAct Master Fund is the beneficial owner
of 1,014,906 shares of Common Stock, representing approximately 1.1% of the
Issuer's outstanding Common Stock (which shares may also be deemed to be
beneficially owned by VA Partners I).

      As of the date hereof, ValueAct SmallCap Master Fund is the beneficial
owner of 4,627,943 shares of Common Stock, representing approximately 5.2% of
the Issuer's outstanding Common Stock.


--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 16 of 21
-----------------------------------------------------------------------------

        ValueAct Management L.P., ValueAct Management LLC, ValueAct Holdings,
ValueAct Holdings GP, VA SmallCap Partners, ValueAct SmallCap Management,
ValueAct SmallCap Management LLC and the Managing Member may each be deemed
the beneficial owner of an aggregate of 5,642,849 shares of Common Stock,
representing approximately 6.4% of the Issuer's outstanding Common Stock.
The ValueAct Master Fund Reporting Persons disclaim Beneficial Ownership of
the Issuer's 4,627,943 shares owned by ValueAct SmallCap Master Fund.  The
ValueAct SmallCap Master Fund Reporting Persons disclaim Beneficial Ownership
of the Issuer's 1,014,906 shares owned by ValueAct Master Fund.  See Item 6.

       All percentages set forth in this Schedule 13D are based upon the
Issuer's reported 88,499,706 outstanding shares of Common Stock as
reported in the Issuer's Form 10-K for the fiscal year ended December 31,
2009.

       (c) In the past 60 days, the Reporting Persons purchased the following
shares of Common Stock in the open market:

Reporting Person          Trade Date           Shares           Price/Share
----------------          ----------          ---------         -----------
ValueAct Master Fund      03/19/2010           750,000             $6.01
                          03/19/2010           250,000             $6.00
                          03/22/2010             8,050             $5.99
                          03/26/2010             6,856             $6.25



Reporting Person          Trade Date           Shares            Price/Share
----------------          ----------          ---------          -----------
SmallCap Master Fund      03/03/2010            12,700              $5.70
                          03/04/2010            65,300              $5.70
                          03/19/2010           250,000              $6.00
                          03/19/2010           750,000              $6.01
                          03/22/2010             8,050              $5.99
                          03/26/2010             6,856              $6.25

       (d) and (e)  Not applicable.


















--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 17 of 21
-----------------------------------------------------------------------------

Item 6.     Contracts, Arrangements, Understandings or Relationships with
            Respect to Securities of the Issuer

       An affiliate of VA Partners I, LLC, which controls ValueAct Master
Fund, is also a minority investor in VA SmallCap Partners, LLC (the general
partner of ValueAct Small Cap Master Fund, L.P.).? Mr. David Lockwood
currently controls VA SmallCap Partners, LLC and has sole legal investment
power and voting control over shares owned by ValueAct SmallCap Master Fund,
L.P. (subject to certain emergency/default rights of VA Partners I, LLC
which are not exercisable in the ordinary course of business).? There are no
legal or contractual agreements currently in effect that would give the
ValueAct Master Fund Reporting Persons currently exercisable rights to
beneficial ownership of the ValueAct SmallCap Master Fund shares or the
ValueAct SmallCap Master Fund Reporting Persons currently exercisable rights
to?beneficial ownership of the ValueAct Master Fund shares.? The ValueAct
Master Fund Reporting Persons and the ValueAct SmallCap Master Fund Reporting
Persons, however, share common facilities and services, have discussed their
respective ownership of the Issuer's shares in the past, and may discuss,
share ideas and confer with each other on the ownership, disposition and
voting of the Issuer's shares in the future.? The ValueAct Master Fund
Reporting Persons disclaim Beneficial Ownership of the Issuer's 4,627,943
shares owned by ValueAct SmallCap Master Fund.  The ValueAct SmallCap Master
Fund Reporting Persons disclaim Beneficial Ownership of the Issuer's
1,014,906 shares owned by ValueAct Master Fund.

       Other than as described elsewhere in this Report and as previously
reported, the Reporting Persons have no understandings, arrangements,
relationships or contracts relating to the Issuer's Common Stock which are
required to be described hereunder.

Item 7.     Material to Be Filed as Exhibits

(1)	Joint Filing Agreement.


--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 18 of 21
-----------------------------------------------------------------------------
                                  SIGNATURE
          After reasonable inquiry and to the best of his knowledge and
belief, the undersigned certifies that the information set forth in this
statement is true, complete and correct.

                              POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below on this Schedule 13D hereby constitutes and appoints Jeffrey W. Ubben,
George F. Hamel, Jr., G. Mason Morfit, David J. Lockwood and Allison
Bennington, and each of them, with full power to act without the other, his
or its true and lawful attorney-in-fact and agent, with full power of
substitution and resubstitution, for him or it and in his or its name, place
and stead, in any and all capacities (until revoked in writing) to sign any
and all amendments to this Schedule 13D, and to file the same, with all
exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary fully to all intents and purposes
as he or it might or could do in person, thereby ratifying and confirming all
that said attorneys-in-fact and agents or any of them, or their or his
substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.

                              ValueAct Capital Master Fund L.P., by
                              VA Partners I, LLC, its General Partner

                              By:     /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer

                              VA Partners I, LLC

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer


                               ValueAct Capital Management, L.P., by
                               ValueAct Capital Management, LLC its
                               General Partner

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer


                               ValueAct Capital Management, LLC

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer



                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 19 of 21
-----------------------------------------------------------------------------

                                ValueAct Holdings, L.P., by
                                ValueAct Holdings GP, LLC, its
                                General Partner

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer


                                 ValueAct Holdings GP, LLC

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer


                              VALUEACT SMALLCAP MASTER FUND, L.P. by VA
                              SMALLCAP PARTNERS, LLC, its General Partner


                              By:       /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member


                              VA SMALLCAP PARTNERS, LLC


                              By:      /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member


                              VALUEACT SMALLCAP MANAGEMENT, L.P. by
                              VALUEACT SMALLCAP MANAGEMENT, LLC, its
                              General Partner

                              By:       /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member


                              VALUEACT SMALLCAP MANAGEMENT, LLC


                              By:      /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member








--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 20 of 21
-----------------------------------------------------------------------------
                                 Exhibit 1

                           JOINT FILING UNDERTAKING

The undersigned parties hereby agree that the Schedule 13D filed herewith
(and any amendments thereto) relating to the Common Stock of Energy
Solutions, Inc. is being filed jointly on behalf of each of them with the
Securities and Exchange Commission pursuant to Section 13(d) of the
Securities Exchange Act of 1934, as amended.

                              ValueAct Capital Master Fund L.P., by
                              VA Partners I, LLC, its General Partner

                              By:     /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer

                              VA Partners I, LLC

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer


                               ValueAct Capital Management, L.P., by
                               ValueAct Capital Management, LLC its
                               General Partner

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010        George F. Hamel, Jr., Chief Operating Officer


                               ValueAct Capital Management, LLC

                               By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010         George F. Hamel, Jr., Chief Operating Officer


                                ValueAct Holdings, L.P., by
                                ValueAct Holdings GP, LLC, its
                                General Partner

                                By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  March 29, 2010          George F. Hamel, Jr., Chief Operating Officer


                                 ValueAct Holdings GP, LLC

                                 By:    /s/  George F. Hamel, Jr.
                                 --------------------------------------
Dated:  March 29, 2010           George F. Hamel, Jr., Chief Operating Officer


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 292756202                                             Page 21 of 21
-----------------------------------------------------------------------------

                              VALUEACT SMALLCAP MASTER FUND, L.P. by VA
                              SMALLCAP PARTNERS, LLC, its General Partner


                              By:       /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member


                              VA SMALLCAP PARTNERS, LLC


                              By:      /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member


                              VALUEACT SMALLCAP MANAGEMENT, L.P. by
                              VALUEACT SMALLCAP MANAGEMENT, LLC, its
                              General Partner

                              By:       /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member


                              VALUEACT SMALLCAP MANAGEMENT, LLC


                              By:      /s/ David Lockwood
                              --------------------------------------
Dated:  March 29, 2010        David Lockwood, Managing Member