Gartner, Inc. Schedule 13G/A reports that Baron Capital Group and affiliated filers collectively beneficially own 7,558,310 shares of Gartner common stock, representing 11.29% of the class. The filing shows shared voting power of 7,497,299 shares and shared dispositive power of 7,558,310.
The filing lists BAMCO, Baron Capital Management, Baron Partners Fund and Ronald Baron as related filing persons and describes advisory-client relationships and parent/subsidiary links among the entities.
Positive
None.
Negative
None.
Insights
Large passive stake disclosed by Baron-affiliated entities.
The filing documents a 11.29% beneficial stake (7,558,310 shares) held with shared voting and dispositive powers. This identifies the Baron group as a significant institutional holder whose holdings are aggregated across affiliated entities.
Cash-flow treatment and intentions for voting or disposition are not stated; subsequent filings would show any changes in stake or voting plans.
Structure and control relationships are explicitly disclosed.
The schedule clarifies that BAMCO and BCM are subsidiaries of BCG and that Ronald Baron controls BCG. It also notes BPF is an advisory client of BAMCO, explaining the basis for shared powers reported.
These disclosures align with beneficial-ownership reporting norms and help interpret who may direct votes; no voting agreements or activist intent are stated.
Key Figures
Beneficial ownership:7,558,310 sharesPercent of class:11.29%Shared voting power:7,497,299 shares+1 more
4 metrics
Beneficial ownership7,558,310 sharesAmount beneficially owned reported in Item 4(a)
Percent of class11.29%Percent of class reported in Item 4(b)
Shared voting power7,497,299 sharesShared power to vote reported in Item 4(c)(ii)
Shared dispositive power7,558,310 sharesShared power to dispose reported in Item 4(c)(iv)
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Shared dispositive powerregulatory
"Item 4. | (iv) Shared power to dispose or to direct the disposition of: 7,558,310"
Advisory clientfinancial
"The advisory clients of BAMCO and BCM have the right to receive or the power to direct the receipt of dividends"
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 24)
Gartner, Inc.
(Name of Issuer)
Common Stock, $.0005 par value per share
(Title of Class of Securities)
366651107
(CUSIP Number)
05/31/2026
(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)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
366651107
1
Names of Reporting Persons
BAMCO INC /NY/
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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
0.00
6
Shared Voting Power
6,965,406.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,026,417.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,026,417.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
10.49 %
12
Type of Reporting Person (See Instructions)
IA, CO
SCHEDULE 13G
CUSIP Number(s):
366651107
1
Names of Reporting Persons
Baron Capital Group, Inc.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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
0.00
6
Shared Voting Power
7,497,299.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,558,310.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,558,310.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
11.29 %
12
Type of Reporting Person (See Instructions)
HC, CO
SCHEDULE 13G
CUSIP Number(s):
366651107
1
Names of Reporting Persons
Baron Capital Management, Inc.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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
0.00
6
Shared Voting Power
531,893.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
531,893.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
531,893.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.79 %
12
Type of Reporting Person (See Instructions)
IA, CO
SCHEDULE 13G
CUSIP Number(s):
366651107
1
Names of Reporting Persons
Ronald Baron
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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
0.00
6
Shared Voting Power
7,497,299.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,558,310.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,558,310.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
11.29 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
366651107
1
Names of Reporting Persons
Baron Partners Fund
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
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
0.00
6
Shared Voting Power
3,377,688.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,377,688.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,377,688.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.04 %
12
Type of Reporting Person (See Instructions)
IV
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Gartner, Inc.
(b)
Address of issuer's principal executive offices:
56 Top Gallant Rd, PO Box 10212, Stamford, CT 06902
Item 2.
(a)
Name of person filing:
Baron Capital Group, Inc. ("BCG"),
BAMCO, Inc. ("BAMCO"),
Baron Capital Management, Inc. ("BCM"),
Ronald Baron,
Baron Partners Fund ("BPF")
(b)
Address or principal business office or, if none, residence:
767 Fifth Avenue, 49th Floor,
New York, NY 10153
(c)
Citizenship:
BCG, BAMCO and BCM are New York corporations. Ronald Baron is a citizen of the United States. BPF is a series of a Delaware Statutory Trust.
(d)
Title of class of securities:
Common Stock, $.0005 par value per share
(e)
CUSIP No.:
366651107
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
7,558,310
(b)
Percent of class:
11.29 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
7,497,299
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
7,558,310
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
The advisory clients of BAMCO and BCM have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Issuer's common stock in their accounts. To the best of the Filing Persons' knowledge, no such person has such interest relating to more than 5% of the outstanding class of securities.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
BAMCO and BCM are subsidiaries of BCG. BPF is an advisory client of BAMCO. Ronald Baron owns a controlling interest in BCG.
Item 8.
Identification and Classification of Members of the Group.
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
Please see Item 3.
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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, other than activities solely in connection with a nomination under § 240.14a-11.
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.
BAMCO INC /NY/
Signature:
/s/ Ronald Baron
Name/Title:
Chairman and CEO
Date:
06/03/2026
Baron Capital Group, Inc.
Signature:
/s/ Ronald Baron
Name/Title:
Chairman and CEO
Date:
06/03/2026
Baron Capital Management, Inc.
Signature:
/s/ Ronald Baron
Name/Title:
Chairman and CEO
Date:
06/03/2026
Ronald Baron
Signature:
/s/ Ronald Baron
Name/Title:
Individually
Date:
06/03/2026
Baron Partners Fund
Signature:
/s/ Ronald Baron
Name/Title:
CEO
Date:
06/03/2026
Comments accompanying signature: Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001)
What stake does Baron Capital report in Gartner (IT)?
Baron-affiliated filers report beneficial ownership of 7,558,310 shares, equal to 11.29% of Gartner's common stock. The filing shows shared voting power of 7,497,299 and shared dispositive power of 7,558,310, reflecting aggregated holdings across affiliated entities.
Which entities are included in the Baron filing for Gartner?
The filing names Baron Capital Group, BAMCO, Baron Capital Management, Ronald Baron, and Baron Partners Fund. It states BAMCO and BCM are subsidiaries of BCG and that BPF is an advisory client of BAMCO, explaining the reported shared powers and aggregation.
Does the Schedule 13G/A disclose voting control or disposition rights?
Yes. The filing reports 0 sole voting or dispositive power and 7,497,299 shared voting and 7,558,310 shared dispositive power. These figures indicate decisions are reported as shared among the filing persons rather than held solely by one entity or person.
Are any third parties identified as having dividend or sale proceeds rights over the shares?
The filing states advisory clients of BAMCO and BCM have the right to receive dividends or proceeds in their accounts, and the filers say that, to their knowledge, no other person holds such rights exceeding 5% of the class.
