SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
(RULE 13d - 102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(b), (c) AND (d)
AND AMENDMENTS THERETO FILED PURSUANT TO 13d
(Amendment No. 1)*
Affiliated Managers Group, Inc.
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
008252108
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(CUSIP Number)
June 26, 2006
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(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
disclosures provided in a prior cover page.
The 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).
(Continued on the Following Pages)
1. NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Amaranth 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
Cayman Islands
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
5. SOLE VOTING POWER
0
6. SHARED VOTING POWER
969,918
7. SOLE DISPOSITIVE POWER
0
8. SHARED DISPOSITIVE POWER
969,918
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See 6 and 8 above.
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES* [ ]
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
3.0%
12. TYPE OF REPORTING PERSON*
CO
1. NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Amaranth Advisors L.L.C.
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 SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
5. SOLE VOTING POWER
0
6. SHARED VOTING POWER
969,918
7. SOLE DISPOSITIVE POWER
0
8. SHARED DISPOSITIVE POWER
969,918
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See 6 and 8 above.
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES* [ ]
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
3.0%
12. TYPE OF REPORTING PERSON*
IA
1. NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Nicholas M. Maounis
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 SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5. SOLE VOTING POWER
0
6. SHARED VOTING POWER
969,918
7. SOLE DISPOSITIVE POWER
0
8. SHARED DISPOSITIVE POWER
969,918
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
See 6 and 8 above.
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES* [ ]
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
3.0%
12. TYPE OF REPORTING PERSON*
IN, HC
This statement is filed with respect to the shares of common stock, having $.01
par value (the "Common Stock") of Affiliated Managers Group, Inc. (the "Issuer")
beneficially owned by Amaranth LLC, a Cayman Islands exempted company, Amaranth
Advisors L.L.C. and Nicholas M. Maounis (collectively, the "Reporting Persons")
as of July 19, 2006 and amends and supplements the Schedule 13G filed April 27,
2006 (the "Schedule 13G"). Except as set forth herein, the Schedule 13G is
unmodified.
Item 4. Ownership.
Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.
(a) Amount beneficially owned:
The Reporting Persons beneficially own 969,918 shares of the Issuer's
Common Stock, which are comprised of (i) 900 shares of Common Stock,
(ii) shares of the Issuer's 6.65% convertible preferred stock which
are convertible into an aggregate of 441,939 shares of Common Stock,
and (iii) 4.3% convertible debentures of the Issuer which are
convertible into 527,079 shares of Common Stock.
(b) Percent of class:
3.0%
(c) Number of shares as to which such person has:
(i) Sole power to vote or direct the vote
0
(ii) Shared power to vote or to direct the vote
See Item 4(a).
(iii) Sole power to dispose or to direct the disposition of
0
(iv) Shared power to dispose or to direct the disposition of
See Item 4(a).
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 have ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [X].
Item 10. Certification.
By signing below the undersigned 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 are not held
in connection with or as a participant in any transaction having that purpose or
effect.
SIGNATURES
After reasonable inquiry and to the best of its knowledge and belief, each
of the undersigned certifies that the information with respect to it set forth
in this statement is true, complete, and correct.
Dated: July 19, 2006
AMARANTH LLC
by Amaranth Advisors L.L.C., as Trading Advisor
By: /s/ Nicholas M. Maounis
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Nicholas M. Maounis, Managing Member
AMARANTH ADVISORS L.L.C.
By: /s/ Nicholas M. Maounis
----------------------------------------
Nicholas M. Maounis, Managing Member
NICHOLAS M. MAOUNIS
/s/ Nicholas M. Maounis
-----------------------
Nicholas M. Maounis