SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13 G
Under the Securities Exchange Act of 1934
Amendment No. 1*
Name of Issuer: GARTNER GROUP INC.
Title of Class of Securities: COMMON CL B
CUSIP Number: 36665120
*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 age.
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).
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CUSIP NO. 36665120
1. Name of Reporting Person, S.S. or I.R.S. Identification No.
of above person:
First Manhattan Co. 13-1957714
2. Check the appropriate box if a member of a group:
(a) [ ]
(b) [ X ]
3. SEC Use Only
4. Citizenship or Place of Organization:
New York
NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:
5. Sole Voting Power: 255,875
6. Shared Voting Power: 2,005,485
7. Sole Dispositive Power: 255,875
8. Shared Dispositive Power: 2,227,708
9. Aggregate Amount Beneficially Owned by
Each Reporting Person: 2,483,583**
10. Check Box If The Aggregate Amount in Row (9)
excludes Certain Shares [ ]
11. Percent of Class Represented by Amount in Row 9: 7.60%
12. Type of Reporting Person:
BD, IA, PN
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** Includes 6,952 shares owned by family members of General Partners of First
Manhattan Co. which are being reported for informational purposes. First
Manhattan Co. disclaims dispositive power as to 221 of such shares and
beneficial ownership as to 6,731 of such shares.
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Item 1(a) Name of Issuer: GARTNER GROUP INC.
Item 1(b) Address of Issuer's
Principal Executive Offices: 56 TOP GALLANT ROAD
P.O. BOX 10212
STAMFORD, CT 06904-2212
Item 2(a) Name of Person Filing: First Manhattan Co.
Item 2(b) Address Principal Business Office:
437 Madison Avenue
New York, NY 10022
Item 2(c) Citizenship: U.S.A.
Item 2(d) Title of Class of Securities: COMMON
Item 2(e) CUSIP Number: 36665120
Item 3 Check whether the person filing is a:
Item 3(a) [X] Broker or Dealer registered under Section 15 of the Act.
Item 3(b) - (d) Not applicable.
Item 3(e) [X] Investment Advisor registered under Section 203
of the Investment Advisors Act of 1940.
Item 3(f) - (h) Not applicable.
Item 4(a) Amount Beneficially Owned: 2,483,583**
Item 4(b) Percent of Class: 7.60%
Item 4(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote 255,875
(ii) shared power to vote or to direct the vte 2,005,485
(iii) sole power to dispose or to direct the
disposition of 255,875
(iv) shared power to dispose or to direct the
disposition of 2,227,708
Item 5 Ownership of Five Percent or Less of Class: [ ]
Item 6 Ownership of More than Five Percent
on Behalf of Another Person: Not applicable.
** Includes 6,952 shares owned by family members of General Partners of First
Manhattan Co. which are being reported for informational purposes. First
Manhattan Co. disclaims dispositive power as to 221 of such shares and
beneficial ownership as to 6,731 of such shares.
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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.
By signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were acquired in the ordinary course of business
and were not acquired for the purpose of and do not have the effect of changing
or influencing the control of the issuer of such securities and were not
acquired in connection with or as a participant in any transaction having such
purpose or effect.
Signature:
After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.
February 7, 2001
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Date
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Signature
Neal K. Stearns, General Partner
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Name/Title
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