SECURITIES & EXCHANGE COMMISSION
Washington, D.C. 20549
----------------------
SCHEDULE 13GA*
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO 13d-2(b)
Affiliated Managers Group, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
008252108
(CUSIP Number)
December 31, 1999
(Date of event which requires filing of this statement)
Check the appropriate box to designate the rule pursuant to which
this Schedule 13G is filed:
[ ] Rule 13d-1(b)
[X] Rule 13d-1(c)
[ ] Rule 13d-1(d)
(Page 1 of 12 Pages)
________________
*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 purposes 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).
<PAGE>
CUSIP No. 008252108 13GA Page 2 of 12 Pages
________________________________________________________________________
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO.
OF ABOVE PERSONS (ENTITIES ONLY)
Lone Spruce, L.P.
____________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a)
[X]
(b) [
]
____________________________________________________________________
(3) SEC USE ONLY
____________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
____________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
-0-
SHARES
______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
48,052
OWNED BY
___________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
-0-
REPORTING
______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
48,052
____________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
48,052
____________________________________________________________________
(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 **
PN
____________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
CUSIP No. 008252108 13GA Page 3 of 12 Pages
____________________________________________________________________
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO.
OF ABOVE PERSONS (ENTITIES ONLY)
Lone Balsam, L.P.
____________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a)
[X]
(b) [
]
____________________________________________________________________
(3) SEC USE ONLY
____________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
____________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
-0-
SHARES
______________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
123,377
OWNED BY
___________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
-0-
REPORTING
______________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
123,377
____________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
123,377
____________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES **
[ ]
____________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
0.6%
____________________________________________________________________
(12) TYPE OF REPORTING PERSON **
PN
____________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
CUSIP No. 008252108 13GA Page 4 of 12 Pages
________________________________________________________________________
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO.
OF ABOVE PERSONS (ENTITIES ONLY)
Lone Sequoia, L.P.
________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a)
[X]
(b) [
]
________________________________________________________________________
(3) SEC USE ONLY
________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
-0-
SHARES _________________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
106,435
OWNED BY _________________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
-0-
REPORTING _________________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
106,435
________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
106,435
________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES **
[ ]
________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
0.5%
________________________________________________________________________
(12) TYPE OF REPORTING PERSON **
PN
________________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
CUSIP No. 008252108 13GA Page 5 of 12 Pages
________________________________________________________________________
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO.
OF ABOVE PERSONS (ENTITIES ONLY)
Lone Pine Associates LLC
________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a)
[X]
(b) [
]
________________________________________________________________________
(3) SEC USE ONLY
________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
-0-
SHARES ___________________________________________________-
BENEFICIALLY (6) SHARED VOTING POWER
277,864
OWNED BY ___________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
-0-
REPORTING ___________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
277,864
________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
277,864
________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES **
[ ]
________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
1.3%
________________________________________________________________________
(12) TYPE OF REPORTING PERSON **
OO
________________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
CUSIP No. 008252108 13GA Page 6 of 12 Pages
________________________________________________________________________
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO.
OF ABOVE PERSONS (ENTITIES ONLY)
Lone Pine Capital LLC
________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a)
[X]
(b) [
]
________________________________________________________________________
(3) SEC USE ONLY
________________________________________________________________________
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
________________________________________________________________________
NUMBER OF (5) SOLE VOTING POWER
-0-
SHARES ____________________________________________________
BENEFICIALLY (6) SHARED VOTING POWER
1,233,638
OWNED BY ____________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
-0-
REPORTING ____________________________________________________-
PERSON WITH (8) SHARED DISPOSITIVE POWER
1,233,638
________________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
1,233,638
________________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES **
[ ]
________________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
5.7%
________________________________________________________________________
(12) TYPE OF REPORTING PERSON **
IA
________________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
CUSIP No. 008252108 13GA Page 7 of 12 Pages
________________________________________________________________________
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO.
OF ABOVE PERSONS (ENTITIES ONLY)
Stephen F. Mandel, Jr.
________________________________________________________________________
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
(a)
[X]
(b) [
]
________________________________________________________________________
(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
1,511,500
OWNED BY _____________________________________________________
EACH (7) SOLE DISPOSITIVE POWER
-0-
REPORTING _____________________________________________________
PERSON WITH (8) SHARED DISPOSITIVE POWER
1,511,500
_______________________________________________________________________
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED
BY EACH REPORTING PERSON
1,511,500
_______________________________________________________________________
(10) CHECK BOX IF THE AGGREGATE AMOUNT
IN ROW (9) EXCLUDES CERTAIN SHARES **
[ ]
_______________________________________________________________________
(11) PERCENT OF CLASS REPRESENTED
BY AMOUNT IN ROW (9)
7.0%
_______________________________________________________________________
(12) TYPE OF REPORTING PERSON **
IN
_______________________________________________________________________
** SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
CUSIP No. 008252108 13GA Page 8 of 12 Pages
Item 1(a). Name of Issuer:
The name of the issuer is Affiliated Managers Group, Inc. (the
"Company").
Item 1(b). Address of Issuer's Principal Executive Offices:
The Company's principal executive offices are located at 2
International Place, Boston, Massachusetts 02110
Item 2(a). Name of Person Filing:
This statement is filed by:
(i) Lone Spruce, L.P., a Delaware limited partnership ("Lone
Spruce"), with respect to the shares of Common Stock
(defined in Item 2(d) below) directly owned by it;
(ii) Lone Balsam, L.P., a Delaware limited partnership ("Lone
Balsam"), with respect to the shares of Common Stock
directly owned by it;
(iii) Lone Sequoia, L.P., a Delaware limited partnership ("Lone
Sequoia"), with respect to the shares of Common Stock
directly owned by it;
(iv) Lone Pine Associates LLC, a Delaware limited liability
company
("Lone Pine"), with respect to the shares of Common Stock
directly owned by Lone Spruce, Lone Balsam and Lone
Sequoia;
(v) Lone Pine Capital LLC, a Delaware limited liability company
("Lone Pine Capital"), which serves as investment manager
to Lone Cypress, Ltd., a Cayman Islands exempted company
("Lone
Cypress"), with respect to the shares of Common Stock
directly
owned by Lone Cypress;
(vi) Stephen F. Mandel, Jr. ("Mr. Mandel"), with respect to the
shares of Common Stock directly owned by each of Lone
Spruce,
Lone Balsam, Lone Sequoia and Lone Cypress.
The foregoing persons are hereinafter sometimes
collectively referred to as the "Reporting Persons". Any
disclosures herein with respect to persons other than the
Reporting Persons are made on information and belief after
making inquiry to the appropriate party.
Item 2(b). Address of Principal Business Office or, if None,
Residence:
The address of the business office of each of the Reporting Persons
is Two Greenwich Plaza, Greenwich, Connecticut 06830.
<PAGE>
CUSIP No. 008252108 13GA Page 9 of 12 Pages
Item 2(c). Citizenship:
Lone Spruce, Lone Balsam and Lone Sequoia are limited partnerships
organized under the laws of the State of Delaware. Lone Pine Associates
LLC and Lone Pine Capital LLC are limited liability companies organized
under the laws of the State of Delaware. Mr. Mandel is a United States
citizen.
Item 2(d). Title of Class of Securities:
Common Stock, $0.01 par value (the "Common Stock")
Item 2(e). CUSIP Number:
008252108
Item 3. If this statement is filed pursuant to Rules 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 in accordance with Rule
13d-1 (b)(1)(ii)(E),
(f) [ ] Employee Benefit Plan or Endowment Fund in
accordance with 13d-1 (b)(1)(ii)(F),
(g) [ ] Parent Holding Company or control person in
accordance with Rule 13d-1 (b)(1)(ii)(G),
(h) [ ] Savings Association 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) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c), check the box. [X]
<PAGE>
CUSIP No. 008252108 13GA Page 10 of 12 Pages
Item 4. Ownership.
A. Lone Spruce, L.P.
(a) Amount beneficially owned: 48,052
(b) Percent of class: 0.2% The percentages used herein and
in the rest of Item 4 are calculated based upon the 21,591,868 shares of
Voting Common Stock issued and outstanding as of November 12, 1999 as
reported in the Company's Form 10-Q for the period ending September 30,
1999.
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 48,052
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:
48,052
B. Lone Balsam, L.P.
(a) Amount beneficially owned: 123,377
(b) Percent of class: 0.6%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 123,377
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:
123,377
C. Lone Sequoia, L.P.
(a) Amount beneficially owned: 106,435
(b) Percent of class: 0.5%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 106,435
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:
106,435
D. Lone Pine Associates LLC
(a) Amount beneficially owned: 277,864
(b) Percent of class: 1.3%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 277,864
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:
277,864
C. Lone Pine Capital LLC
(a) Amount beneficially owned: 1,233,638
(b) Percent of class: 5.7%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 1,233,638
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:
1,233,638
D. Stephen F. Mandel, Jr.
(a) Amount beneficially owned: 1,511,500
(b) Percent of class: 7.0%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 1,511,500
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition: 1,511,500
<PAGE>
CUSIP No. 008252108 13GA Page 11 of 12 Pages
Item 5. Ownership of Five Percent or Less of a Class.
Not applicable.
Item 6. Ownership of More than Five Percent on Behalf of Another
Person.
Lone Pine, the general partner of Lone Spruce, Lone Sequoia and Lone
Balsam, has the power to direct the affairs of Lone Spruce, Lone Sequoia
and Lone Balsam, including decisions respecting the disposition of the
proceeds from the sale of shares. Mr. Mandel is the Managing Member of
Lone Pine and in that capacity directs its operations. Lone Cypress, a
client of Lone Pine Capital of which Mr. Mandel is the Managing Member,
has the power to direct the receipt of dividends from or the proceeds of
the sale of shares.
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.
See Item 2.
Item 9. Notice of Dissolution of Group.
Not applicable.
Item 10. Certification.
Each of the Reporting Persons hereby makes the following
certification:
By signing below I certify that, to the best of my 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.
<PAGE>
CUSIP No. 008252108 13GA Page 12 of 12 Pages
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 14, 2000
LONE SPRUCE, L.P.
By: Lone Pine Associates LLC,
General Partner
By: /s/ Stephen F. Mandel, Jr.
--------------------------
Stephen F. Mandel, Jr.
Managing Member
LONE BALSAM, L.P.
By: Lone Pine Associates LLC,
General Partner
By: /s/ Stephen F. Mandel, Jr.
--------------------------
Stephen F. Mandel, Jr.
Managing Member
LONE SEQUOIA, L.P.
By: Lone Pine Associates LLC,
General Partner
By: /s/ Stephen F. Mandel, Jr.
--------------------------
Stephen F. Mandel, Jr.
Managing Member
LONE PINE ASSOCIATES LLC,
By: /s/ Stephen F. Mandel, Jr.
--------------------------
Stephen F. Mandel, Jr.
Managing Member
LONE PINE CAPITAL LLC,
By: /s/ Stephen F. Mandel, Jr.
--------------------------
Stephen F. Mandel, Jr.
Managing Member
STEPHEN F. MANDEL, JR.
/s/ Stephen F. Mandel, Jr.
- --------------------------------
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