UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
Under the Securities and Exchange Act of 1534

(Amendment No. 10)*

MDS Inc.
(Name of Issuer)

Common Stock, par value $.01 per share
(Title of Class of Securities)

55269P302
(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

April 7, 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 1534 ("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. 55269P302 Page 2 of 13
-----------------------------------------------------------------------------
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 2,717,475**
 OWNED BY EACH ----------------------------------------------------------
 PERSON WITH 9. SOLE DISPOSITIVE POWER
 0
 ----------------------------------------------------------
 10. SHARED DISPOSITIVE POWER
 2,717,475**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 2,717,475**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
 CERTAIN SHARES [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 4.0%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

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


SCHEDULE 13D

-------------------------- -------------------------
CUSIP NO. 55269P302 Page 3 of 13
----------------------------------------------------------------------------
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 2,717,475**
 OWNED BY EACH ----------------------------------------------------------
 PERSON WITH 9. SOLE DISPOSITIVE POWER
 0
 ----------------------------------------------------------
 10. SHARED DISPOSITIVE POWER
 2,717,475**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 2,717,475**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
 CERTAIN SHARES [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 4.0%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

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


SCHEDULE 13D

-------------------------- -------------------------
CUSIP NO. 55269P302 Page 4 of 13
----------------------------------------------------------------------------
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 2,717,475**
 OWNED BY EACH ----------------------------------------------------------
 PERSON WITH 9. SOLE DISPOSITIVE POWER
 0
 ----------------------------------------------------------
 10. SHARED DISPOSITIVE POWER
 2,717,475**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 2,717,475**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
 CERTAIN SHARES [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 4.0%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

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


SCHEDULE 13D

-------------------------- -------------------------
CUSIP NO. 55269P302 Page 5 of 13
----------------------------------------------------------------------------
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 2,717,475**
 OWNED BY EACH ----------------------------------------------------------
 PERSON WITH 9. SOLE DISPOSITIVE POWER
 0
 ----------------------------------------------------------
 10. SHARED DISPOSITIVE POWER
 2,717,475**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 2,717,475**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
 CERTAIN SHARES [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 4.0%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

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


SCHEDULE 13D

-------------------------- -------------------------
CUSIP NO. 55269P302 Page 6 of 13
-----------------------------------------------------------------------------
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 2,717,475**
 OWNED BY EACH ----------------------------------------------------------
 PERSON WITH 9. SOLE DISPOSITIVE POWER
 0
 ----------------------------------------------------------
 10. SHARED DISPOSITIVE POWER
 2,717,475**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 2,717,475**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
 CERTAIN SHARES [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 4.0%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

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


SCHEDULE 13D

-------------------------- -------------------------
CUSIP NO. 55269P302 Page 7 of 13
-----------------------------------------------------------------------------
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 2,717,475**
 OWNED BY EACH ----------------------------------------------------------
 PERSON WITH 9. SOLE DISPOSITIVE POWER
 0
 ----------------------------------------------------------
 10. SHARED DISPOSITIVE POWER
 2,717,475**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 2,717,475**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
 CERTAIN SHARES [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 4.0%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

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


-------------------------- -------------------------
CUSIP NO. 55269P302 Page 8 of 13
-----------------------------------------------------------------------------
THE PURPOSE OF THIS AMENDMENT NO. 10 TO SCHEDULE 13D IS TO AMEND THE
OWNERSHIP REPORTS OF THE REPORTING PERSONS. THE INFORMATION BELOW SUPPLEMENTS
THE INFORMATION PREVIOUSLY PROVIDED.

Item 1. Security and Issuer

 This Schedule 13D relates to the Common Stock, par value $0.01 per
share (the "Common Stock"), of MDS Inc., a Canadian corporation
(the "Issuer"). The address of the principal executive offices of the
Issuer is 2810 Matheson Blvd. E., Suite 500, Mississauga, Ontario, L4W 4X7
Canada.

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") and (f) ValueAct Holdings GP, LLC ("ValueAct
Holdings GP") (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.

 (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.


-------------------------- -------------------------
CUSIP NO. 55269P302 Page 9 of 13
-----------------------------------------------------------------------------

Item 3. Source and Amount of Funds or Other Consideration

 Not applicable in that the transaction involved the sale of, and not
the acquisition of, securities.

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. Shares reported
as beneficially owned by ValueAct Master Fund are also reported as
beneficially owned by (i) ValueAct Management L.P. as the manager of such
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 and (iv) ValueAct Holdings GP, as
General Partner of ValueAct Holdings. Shares reported as beneficially owned
by ValueAct Master Fund are also reported as beneficially owned by VA
Partners I, as General Partner of ValueAct Master Fund. 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 relationship 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 VA Partners I (only with respect to ValueAct Master Fund),
ValueAct Management L.P., ValueAct Management LLC, ValueAct Holdings and
ValueAct Holdings GP.

 As of the date hereof, ValueAct Master Fund is the beneficial owner
of 2,717,475 shares of Common Stock, representing approximately 4.0% of the
Issuer's outstanding Common Stock (which shares may also be deemed to be
beneficially owned by VA Partners I).

 ValueAct Management L.P., ValueAct Management LLC, ValueAct Holdings
and ValueAct Holdings GP may each be deemed the beneficial owner of an
aggregate of 2,717,475 shares of Common Stock, representing approximately
4.0% of the Issuer's outstanding Common Stock.

 All percentages set forth in this Schedule 13D are based upon the
Issuer's expected 67,200,000 outstanding shares as indicated in the Issuer's
press release of March 30, 2010.

(c) Since the date of the last filing, the Reporting Persons sold
the following shares through broker sales pursuant to Rule 144:

Reporting Person Trade Date Shares Price/Share
---------------- ---------- --------- -----------
ValueAct Master Fund 04/06/2010 250,000 $8.57
 04/07/2010 600,400 $8.70
 04/12/2010 1,024,281 $9.00
 04/13/2010 1,500,000 $8.98


-------------------------- -------------------------
CUSIP NO. 55269P302 Page 10 of 13
-----------------------------------------------------------------------------

 Since the date of the last filing, the Reporting Persons sold the
following shares on the Toronto Stock Exchange pursuant to Regulation S:

Reporting Person Trade Date Shares Price/Share
---------------- ---------- --------- -----------
ValueAct Master Fund 04/08/2010 200,000 $8.83
 04/09/2010 200,000 $8.81
 04/12/2010 100,000 $8.99
 04/12/2010 154,900 $9.01

 In addition to the above sales and as reported in the last filing, on
March 29, 2010 the Reporting Persons tendered 500,000 shares at an
unspecified price and 2.5 million shares at $8.80 per share into the Issuer's
substantial issuer bid (the "Bid"). The election of 2.5 million shares at
$8.80 per share was not accepted, 497,744 shares were accepted at a price of
$8.50 per share. Assuming the number of common shares issued and outstanding
will be approximately 67.2 million as indicated in the Issuer's press release
of March 30, 2010, the Reporting Persons expect to hold 2,717,475 common
shares, representing approximately 4.0% of the total outstanding common
shares, of the Issuer. Further information regarding the Issuer's Bid can be
found on www.sedar.com.

(d) Not applicable.

 (e) As of April 13, 2010 the Reporting Persons ceased to be
beneficial owners of more than five percent of Issuer's Common Stock, and
accordingly, their obligation to file a Schedule 13D has been terminated.


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

 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. 55269P302 Page 11 of 13
-----------------------------------------------------------------------------
 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 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: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer

 VA Partners I, LLC

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 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: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer


 ValueAct Capital Management, LLC

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer


-------------------------- -------------------------
CUSIP NO. 55269P302 Page 12 of 13
-----------------------------------------------------------------------------

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

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer


 ValueAct Holdings GP, LLC

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer


-------------------------- -------------------------
CUSIP NO. 55269P302 Page 13 of 13
-----------------------------------------------------------------------------
 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 MDS, 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 1534, as amended.

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

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer

 VA Partners I, LLC

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 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: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer


 ValueAct Capital Management, LLC

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 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: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer


 ValueAct Holdings GP, LLC

 By: /s/ George F. Hamel, Jr.
 --------------------------------------
Dated: April 14, 2010 George F. Hamel, Jr., Chief Operating Officer

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