Baron Group reports 8.40% stake in Gartner

Gartner, Inc. ownership update: Baron Capital Group and affiliated entities report beneficial ownership of 5,917,616 shares, representing 8.40% of common stock as of 03/31/2026.

Rhea-AI Filing Summary

Gartner, Inc. ownership update: Baron Capital Group and affiliated entities report beneficial ownership of 5,917,616 shares, representing 8.40% of common stock as of 03/31/2026. The filing shows shared voting power of 5,855,105 shares and shared dispositive power of 5,917,616. The disclosure notes that BAMCO and BCM are subsidiaries of Baron Capital Group and that advisory clients hold accounts subject to Item 6 description. The schedule is signed by Ronald Baron on 05/15/2026.

Insights

Institutional Ownership Analyst

Baron-related entities hold an 8.40% position in Gartner as of 03/31/2026.

The filing lists 5,917,616 shares beneficially owned with 5,855,105 shares of shared voting power. This indicates a substantial block position reported under Schedule 13G/A.

Ownership is held collectively by Baron Capital Group, BAMCO and BCM; timing and any future dispositions are not described in the excerpt.

Corporate Governance Specialist

Shared voting and dispositive powers are disclosed, with subsidiary relationships identified.

The filing clarifies that BAMCO and BCM are subsidiaries of Baron Capital Group and that Ronald Baron controls BCG. Item 6 notes advisory clients may have rights to dividends/proceeds, but no single client exceeds 5% per the filing.

Subsequent filings would be needed to see any changes to voting alignment or planned transfers.

Key Figures

Beneficial ownership: 5,917,616 shares Percent of class: 8.40% Shared voting power: 5,855,105 shares +3 more

6 metrics

Beneficial ownership 5,917,616 shares reported as beneficially owned as of <date>03/31/2026</date>

Percent of class 8.40% percentage of common stock as stated in Item 4(b)

Shared voting power 5,855,105 shares shared power to vote reported in Item 4(c)(ii)

Shared dispositive power 5,917,616 shares shared power to dispose reported in Item 4(c)(iv)

CUSIP 366651107 Issuer CUSIP for common stock as listed in Item 2(d)/(e)

Reporting period/date 03/31/2026 date to which ownership figures apply as shown at top of filing

Key Terms

beneficially owned, shared dispositive power, Schedule 13G/A, Item 6

4 terms

beneficially owned regulatory

"Amount beneficially owned: 5,917,616 (Item 4)"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared dispositive power regulatory

"Shared Dispositive Power 5,917,616.00"

Schedule 13G/A regulatory

"(Amendment No. 23 ) Gartner, Inc. Common Stock"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Item 6 regulatory

"Item 6. | Ownership of more than 5 Percent on Behalf of Another Person."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Baron Capital report in Gartner (IT)?

Baron-related entities report 5,917,616 shares, equal to 8.40% of Gartner's common stock as of 03/31/2026. The filing is a Schedule 13G/A amendment reflecting beneficial ownership and voting/dispositive power details.

Who specifically holds voting power for the Baron position?

The filing shows shared voting power of 5,855,105 shares attributed to the group. BAMCO, BCM and Baron Capital Group are disclosed as related filers sharing voting authority over those shares.

Do any advisory clients hold more than 5% of Gartner according to this filing?

No; the filing states advisory clients of BAMCO and BCM may receive dividends or proceeds, and to the filers' knowledge no such client holds over 5% of the class as described in Item 6.

What is the filing date and who signed the Schedule 13G/A?

The Schedule 13G/A amendment is signed by Ronald Baron with signature dates shown as 05/15/2026. The ownership figures are reported as of 03/31/2026.

Are BAMCO and BCM independent holders or subsidiaries?

BAMCO and BCM are disclosed as subsidiaries of Baron Capital Group in Item 7. The filing states Ronald Baron owns a controlling interest in Baron Capital Group.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 05/15/2026 - 01:54 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 23)

Gartner, Inc.

(Name of Issuer)

Common Stock, $.0005 par value per share

(Title of Class of Securities)

366651107

(CUSIP Number)

03/31/2026

(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 5,444,566.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,507,077.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,507,077.00

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)

7.82 %

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 5,855,105.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,917,616.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,917,616.00

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)

8.40 %

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 410,539.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 410,539.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

410,539.00

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)

0.58 %

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 5,855,105.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,917,616.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,917,616.00

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)

8.40 %

12

Type of Reporting Person (See Instructions)

HC, IN

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
(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.
(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: 5,917,616
(b)	Percent of class: 8.40 %
(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: 5,855,105
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 5,917,616
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. 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:	05/15/2026

Baron Capital Group, Inc.

Signature:	/s/ Ronald Baron
Name/Title:	Chairman and CEO
Date:	05/15/2026

Baron Capital Management, Inc.

Signature:	/s/ Ronald Baron
Name/Title:	Chairman and CEO
Date:	05/15/2026

Ronald Baron

Signature:	/s/ Ronald Baron
Name/Title:	Individually
Date:	05/15/2026

Comments accompanying signature: Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001)