SC 13G/A
VIKING GLOBAL PERFORMANCE LLC
VIKING GLOBAL INVESTORS LP
VIKING GLOBAL EQUITIES LP
VIKING GLOBAL EQUITIES II LP
VGE III PORTFOLIO LTD.
VIKING LONG FUND GP LLC
VIKING LONG FUND MASTER LTD.
O. ANDREAS HALVORSEN
DAVID C. OTT
THOMAS W. PURCELL, JR.
NYSE
0000893949
Mednax, Inc.
65-0271219
Eric Komitee
203-863-5000
SC 13G/A
viking1.txt
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
________________
Schedule 13G/A
(Rule 13d-102)
________________
INFORMATION TO BE INCLUDED IN STATEMENTS PURSUANT TO RULES 13d-1(b),(c)
AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2
UNDER THE SECURITIES EXCHANGE ACT OF 1934*
(Amendment No. 1)
Mednax, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
58502B106
(CUSIP Number)
December 31, 2010
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
[ ] Rule 13d-1(b)
[X] Rule 13d-1(c)
[ ] Rule 13d-1(d)
___________
* 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 the disclosures provided in a prior cover page.
The information required in 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 13G/A PAGE 2 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Viking Global Investors LP
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
2,099,887
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
2,099,887
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
2,099,887
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
4.4%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
PN
_____________________________________________________________________________
Schedule 13G/A PAGE 3 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Viking Global Performance LLC
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
1,986,087
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
1,986,087
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
1,986,087
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
4.2%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
OO
_____________________________________________________________________________
Schedule 13G/A PAGE 4 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Viking Global Equities LP
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
683,200
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
683,200
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
683,200
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
1.4%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
PN
_____________________________________________________________________________
Schedule 13G/A PAGE 5 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Viking Global Equities II LP
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
39,600
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
39,600
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
39,600
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
0.1%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
PN
_____________________________________________________________________________
Schedule 13G/A PAGE 6 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
VGE III Portfolio Ltd.
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Cayman Islands
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
1,263,287
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
1,263,287
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
1,263,287
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
2.6%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
OO
_____________________________________________________________________________
Schedule 13G/A PAGE 7 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Viking Long Fund GP LLC
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
113,800
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
113,800
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
113,800
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
0.2%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
OO
_____________________________________________________________________________
Schedule 13G/A PAGE 8 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Viking Long Fund Master Ltd.
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Cayman Islands
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
113,800
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
113,800
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
113,800
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
0.2%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
CO
_____________________________________________________________________________
Schedule 13G/A PAGE 9 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
O. Andreas Halvorsen
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Norway
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
2,099,887
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
2,099,887
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
2,099,887
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
4.4%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
IN
_____________________________________________________________________________
Schedule 13G/A PAGE 10 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
David C. Ott
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
United States
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
2,099,887
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
2,099,887
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
2,099,887
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
4.4%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
IN
_____________________________________________________________________________
Schedule 13G/A PAGE 11 of 16
CUSIP No. 58502B106
_____________________________________________________________________________
(1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Thomas W. Purcell, Jr.
_____________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]
_____________________________________________________________________________
(3) SEC USE ONLY
_____________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
United States
_____________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
0
SHARES ______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
2,099,887
OWNED BY ______________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
0
REPORTING ______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
2,099,887
_____________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
2,099,887
_____________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
_____________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
4.4%
_____________________________________________________________________________
(12) TYPE OF REPORTING PERSON
IN
_____________________________________________________________________________
Schedule 13G/A PAGE 12 of 16
CUSIP No. 58502B106
ITEM 1(a). NAME OF ISSUER:
Mednax, Inc.
ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
1301 Concord Terrace, Sunrise, Florida 33323
ITEM 2(a). NAME OF PERSON FILING:
Viking Global Performance LLC ("VGP"),
Viking Global Investors LP ("VGI"),
Viking Global Equities LP ("VGE"),
Viking Global Equities II LP ("VGEII"),
VGE III Portfolio Ltd. ("VGEIII")
Viking Long Fund GP LLC ("VLFGP")
Viking Long Fund Master Ltd. ("VLFM")
O. Andreas Halvorsen, David C. Ott and
Thomas W. Purcell, Jr. (collectively, the "Reporting Persons")
ITEM 2(b). ADDRESS OF PRINCIPAL OFFICE OR, IF NONE, RESIDENCE:
The business address of each of the Reporting Persons is
55 Railroad Avenue, Greenwich, Connecticut 06830.
ITEM 2(c). CITIZENSHIP:
VGE, VGEII and VGI are Delaware limited partnerships,
VGEIII and VLFM are Cayman Island exempted companies,
and VGP and VLFGP are both Delaware limited liability
companies. O. Andreas Halvorsen is a citizen of Norway.
David C. Ott and Thomas W. Purcell, Jr. are citizens of
the United States.
ITEM 2(d). TITLE OF CLASS OF SECURITIES:
Common Stock, par value $.01 (the "Common Stock")
ITEM 2(e). CUSIP NUMBER: 58502B106
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO 13d-1(b) OR 13d-2(b) OR (c),
CHECK WHETHER THE PERSON FILING IS A:
(a) [ ] Broker or dealer registered under Section 15 of the
Act
(b) [ ] Bank as defined in Section 3(a)(6) of the Act
(c) [ ] Insurance Company as defined in Section 3(a)(19) of
the Act
(d) [ ] Investment Company registered under Section 8 of the
Investment Company Act of 1940
(e) [ ] Investment Adviser registered under Section 203 of the
Investment Advisers Act of 1940: see Rule 13d-
1(b)(1)(ii)(E)
(f) [ ] Employee Benefit Plan, Pension Fund which is subject
to the provisions of the Employee Retirement Income
Security Act of 1974 or Endowment Fund; see Rule 13d-
1(b)(1)(ii)(F)
Schedule 13G/A PAGE 13 of 16
CUSIP No. 58502B106
(g) [ ] Parent Holding Company, in accordance with Rule 13d-
1(b)(ii)(G);
(h) [ ] Savings Associations as defined in Section 3(b) of the
Federal Deposit Insurance Act;
(i) [ ] Church Plan that is excluded from the definition of an
investment company under Section 3(c)(14) of the
Investment Company Act of 1940;
(j) [ ] A non-U.S. institution in accordance with
Rule 240.13d-1(b)(1)(ii)(J)
(K) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
If filing as a non-U.S. institution in accordance with
Rule 240.13d-1(b)(1)(ii)(J), please specify
the type of institution:
ITEM 4. OWNERSHIP.
A. VGI
(a) Amount beneficially owned 2,099,887
(b) Percent of class: 4.4%
The percentages used herein and in this Item 4 are calculated based
upon the Company's Form 10-Q for the quarterly period ended
September 30, 2010 filed on November 3, 2010, which states that as
of October 29, 2010 there were 47,689,220 shares of Common Stock
outstanding.
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
2,099,887
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 2,099,887
VGI provides managerial services to VGE, VGEII,VGEIII
and VLFM. VGI has the authority to dispose of and vote
the shares of Common Stock.
Based on Rule 13d-3 of the Securities Exchange Act of 1934,
as amended (the "Act"), VGI may be deemed to beneficially
own the shares of Common Stock directly held by VGE, VGEII,
VGEIII and VLFM. VGI does not directly own any shares of Common
Stock.
Schedule 13G/A PAGE 14 of 16
CUSIP No. 58502B106
B. VGP
(a) Amount beneficially owned: 1,986,087
(b) Percent of class: 4.2%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
1,986,087
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 1,986,087
VGP, as the general partner of VGE and VGEII, has the
authority to dispose of and vote the shares of Common Stock
directly owned by VGE and VGEII. VGP serves as investment
manager to VGEIII and has the authority to dispose of and vote
the shares of Common Stock directly owned by VGEIII. VGP does
not directly own any shares of Common Stock.
Based on Rule 13d-3 of the Act, VGP may be deemed to
beneficially own the shares of Common Stock directly held by
VGE, VGEII and VGEIII.
C. VLFGP
(a) Amount beneficially owned: 113,800
(b) Percent of class: 0.2%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
113,800
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 113,800
VLFGP, serves as the investment manager of VLFM and has the
authority to dispose of and vote the shares of Common Stock
directly owned by VLFM. VLFGP does not directly own
any shares of Common Stock.
Based on Rule 13d-3 of the Act, VLFGP may be deemed to
beneficially own the shares of Common Stock directly held by
VLFM.
D. VGE
(a) Amount beneficially owned: 683,200
(b) Percent of class: 1.4%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
683,200
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 683,200
VGE has the authority to dispose of and vote the shares
of Common Stock directly owned by it, which power may be
exercised by its general partner, VGP, and by VGI, an
affiliate of VGP, that provides managerial services to VGE.
E. VGE II
(a) Amount beneficially owned: 39,600
(b) Percent of class: 0.1%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
39,600
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 39,600
VGEII has the authority to dispose of and vote the shares
of Common Stock directly owned by it, which power may be
exercised by its general partner, VGP and by VGI, an
affiliate of VGP, which provides managerial services to VGEII.
F. VGEIII
(a) Amount beneficially owned: 1,263,287
(b) Percent of class: 2.6%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
1,263,287
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 1,263,287
VGEIII has the authority to dispose of and vote the shares
of Common Stock directly owned by it, which power may be
exercised by its investment manager, VGP and by VGI, an
affiliate of VGP, which provides managerial services to VGEIII.
Viking Global Equities III Ltd. (a Cayman Islands exempted company)
invests substantially all of its assets through VGEIII.
G. VLFM
(a) Amount beneficially owned: 113,800
(b) Percent of class: .2%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
113,800
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 113,800
VLFM has the authority to dispose of and vote the
shares of Common Stock directly owned by it, which power may
be exercised by its investment manager, VLFGP and by VGI,
an affiliate of VLFGP, which provides managerial services
to VLFM. Viking Long Fund LP (a Delaware limited partnership)
and Viking Long Fund III Ltd. (a Cayman Islands exempted company),
through its investment in Viking Long Fund Intermediate LP
(a Cayman Islands limited partnership), invest substantially
all of their assets through VLFM.
Schedule 13G/A PAGE 15 of 16
CUSIP No. 58502B106
H. O. Andreas Halvorsen, David C. Ott and Thomas W. Purcell, Jr.
(a) Amount beneficially owned: 2,099,887
(b) Percent of class: 4.4%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
2,099,887
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 2,099,887
Messrs. Halvorsen, Ott, and Purcell, as
Executive Committee Members of VGI, VGP, and VLFGP, have shared
authority to dispose of and vote the shares of Common Stock
beneficially owned by VGI, VGP and VLFGP. None of Messrs.
Halvorsen, Ott and Purcell directly owns any shares of Common
Stock.
Based on Rule 13d-3 of the Act, each may be deemed to beneficially
own the shares of Common Stock directly held by VGE, VGE II, VGEIII
and VLFM.
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
If this statement is being filed to report the fact that as of the
date hereof the Reporting Persons has ceased to be the beneficial
owner of more than five percent of the class of securities,
check the following.[X]
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
Not applicable.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
Not applicable.
ITEM 10. CERTIFICATION. (if filing pursuant to Rule 13d-1(c))
By signing below each Reporting Person certifies that, to the best
of its knowledge and belief, the securities referred to above were not
acquired and are not held for the purpose of or with the effect of
changing or influencing the control of the issuer of the securities
and were not acquired and not held in connection with or as a
participant in any transaction having that purpose or effect.
Schedule 13G/A PAGE 16 of 16
CUSIP No. 58502B106
SIGNATURES
After reasonable inquiry and to the best of our knowledge and belief,
the undersigned certify that the information set forth in this statement is
true, complete and correct.
DATED: February 11, 2011
/s/ O. ANDREAS HALVORSEN
By: O. Andreas Halvorsen - individually and
as an Executive Committee Member of
VIKING GLOBAL PERFORMANCE LLC, on behalf
of itself and VIKING GLOBAL EQUITIES LP,
VIKING GLOBAL EQUITIES II LP,VGE III PORTFOLIO LTD.
and as an Executive Committee Member of
Viking Global Partners LLC, on behalf of
VIKING GLOBAL INVESTORS LP, and as
an Executive Committee Member of
VIKING LONG FUND GP LLC on behalf of itself
and VIKING LONG FUND MASTER LTD.
/s/ DAVID C. OTT
By: David C. Ott- individually and
as an Executive Committee Member of
VIKING GLOBAL PERFORMANCE LLC, on behalf
of itself and VIKING GLOBAL EQUITIES LP,
VIKING GLOBAL EQUITIES II LP,VGE III PORTFOLIO LTD.
and as an Executive Committee Member of
Viking Global Partners LLC, on behalf of
VIKING GLOBAL INVESTORS LP, and as
an Executive Committee Member of
VIKING LONG FUND GP LLC on behalf of itself
and VIKING LONG FUND MASTER LTD.
/s/ THOMAS W. PURCELL, JR.
By: Thomas W. Purcell, Jr.- individually and
as an Executive Committee Member of
VIKING GLOBAL PERFORMANCE LLC, on behalf
of itself and VIKING GLOBAL EQUITIES LP,
VIKING GLOBAL EQUITIES II LP,VGE III PORTFOLIO LTD.
and as an Executive Committee Member of
Viking Global Partners LLC, on behalf of
VIKING GLOBAL INVESTORS LP, and as
an Executive Committee Member of
VIKING LONG FUND GP LLC on behalf of itself
and VIKING LONG FUND MASTER LTD.