Comparable stake leader
BAMCO INC /NY/
SEC ownership of GARTNER INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000749251.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
08 Jun 2026
- Public ticker
- IT on NYSE
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- BAMCO INC /NY/
- Latest 13D/G holder
- BAMCO INC /NY/
- Latest parsed ownership date
- 08 Jun 2026
- Issuer CIK
- 0000749251
- Issuer location
- Stamford, CT
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GARTNER INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BAMCO INC /NY/
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
08 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 11%
13D/G row: BAMCO INC /NY/
Showing 1-8 of 50 holder rows.
Quick read
BAMCO INC /NY/ leads the comparable SEC ownership view at 11%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BAMCO INC /NY/'s linked filing trail.
Comparable ownership
Top 5
BAMCO INC /NY/
11%
BlackRock, Inc.
9.5%
VANGUARD CAPITAL MANAGEMENT LLC
7.3%
Independent Franchise Partners LLP
6.5%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BAMCO INC /NY/ |
13D/G
13F
Baron Capital Group, Inc. · Company
|
11%
|
$1,116,437,970
7,558,310 shares
|
+$242,346,911 | 31 May 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
9.5%
|
$2,945,536,104
7,286,961 shares
|
$0 | 30 Jun 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.3%
|
$817,526,996
5,163,111 shares
|
$0 | 31 Mar 2026 |
| Independent Franchise Partners LLP |
13F
13D/G
Company
|
6.5%
from 13D/G
|
$728,486,080
4,600,771 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.3%
|
$587,814,132
3,712,354 shares
|
$0 | 31 Mar 2026 |
| AQR CAPITAL MANAGEMENT LLC |
13F
13D/G
Company
|
5.1%
from 13D/G
|
$564,840,405
3,567,263 shares
|
— | 31 Mar 2026 |
| Capital International Investors |
13F
13D/G
Company
|
2.9%
from 13D/G
|
$320,296,327
2,022,839 shares
|
— | 31 Mar 2026 |
| Stephen G. Pagliuca |
3/4/5
Director
|
0.17%
|
$18,037,880
112,415 shares
mixed-class rows
|
+$9,940,341 | 28 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$9,886,337.
Buys
$10,048,044
Insiders: 3
Sells
$161,707
Insiders: 2
Net
+$9,886,337
Shares: +43,075
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 43,767
Shares: 692
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 50 | 0 | $7,706 | $0 | +$7,706 |
| 6-9 | 43,300 | 587 | $9,940,341 | $135,488 | +$9,804,853 |
| 9-12 | 417 | 105 | $99,997 | $26,220 | +$73,777 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 32 reporting-owner rows connected to GARTNER INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
32
Largest Forms 3/4/5 holder
James C. Smith
Net 12M change
+$9,886,337
Latest report
08 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| James C. Smith | Director | $268,884,954 | Mixed | 26 Nov 2024 | ||
| Eugene A. Hall | Chairman and CEO, Director | $188,139,112 | Median | 29 May 2026 | ||
| Alwyn Dawkins | EVP, Global Business Sales | $27,616,916 | Mixed | 29 Nov 2024 | ||
| Stephen G. Pagliuca | Director | $18,037,880 | +$9,940,341 | +123% | Mixed | 28 May 2026 |
| Craig Safian | Evp & Cfo | $13,153,620 | Median | 29 May 2026 | ||
| Raul E. Cesan | Director | $12,635,477 | Mixed | 28 May 2026 | ||
| Michael Patrick Diliberto | EVP, Chief Information Officer | $8,423,320 | Mixed | 23 Aug 2023 | ||
| William O Grabe | Director | $8,285,242 | Mixed | 28 May 2026 | ||
| Joseph P. Beck | EVP, Global Technology Sales | $6,945,412 | Mixed | 08 Nov 2024 | ||
| Valentin Sribar | EVP, Research & Advisory | $6,871,079 | Mixed | 10 Feb 2025 | ||
| Kenneth Allard | EVP, Digital Markets | $6,526,256 | Mixed | 10 Feb 2025 | ||
| Jules Kaufman | Evp, Gc | $6,281,636 | Mixed | 31 Aug 2022 | ||
| Richard J. Bressler | Director | $5,261,465 | Mixed | 28 May 2026 | ||
| Michael P. Harris | EVP, Research & Advisory | $4,620,486 | Mixed | 30 Aug 2021 | ||
| Scott Hensel | EVP Global Services & Delivery | $4,151,263 | Mixed | 09 Feb 2026 | ||
| Robin B. Kranich | Evp & Chro | $3,742,524 | Median | 29 May 2026 | ||
| Karen E. Dykstra | Director | $3,017,114 | Mixed | 28 May 2026 | ||
| Anne Sutherland Fuchs | Director | $2,375,836 | Mixed | 28 May 2026 | ||
| Thomas Sang Kim | EVP, Chief Legal Officer | $2,058,292 | Mixed | 04 May 2026 | ||
| William James Wartinbee III | EVP, Global Sales&Serv Ops | $1,435,034 | Mixed | 09 Feb 2026 |
Recent insider transactions for GARTNER INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Eileen Serra | IT | Common Stock | Options Exercise | 74.8% | 1,744 | 4,076 | 08 Jun 2026 | Direct | ||
| Eileen Serra | IT | Restricted Stock Units | Options Exercise | -100% | -1,744 | 0 | 08 Jun 2026 | Direct | ||
| Eileen Serra | IT | Common Stock | Options Exercise | 43.3% | 705 | 2,332 | 01 Jun 2026 | Direct | ||
| Eileen Serra | IT | Restricted Stock Units | Options Exercise | -100% | -705 | 0 | 01 Jun 2026 | Direct | ||
| Robin B. Kranich | IT | Common Stock | Other | 0.16% | 38 | 23,636 | 29 May 2026 | Direct | ||
| Altaf Rupani | IT | Common Stock | Other | 1.99% | 23 | 1,180 | 29 May 2026 | Direct | ||
| Dick van Ham | IT | Common Stock | Other | 4.4% | 38 | 902 | 29 May 2026 | Direct | ||
| Craig Safian | IT | Common Stock | Other | 0.03% | 22 | 83,072 | 29 May 2026 | Direct | ||
| Eugene A. Hall | IT | Common Stock | Other | 38 | 1,188,197 | 29 May 2026 | Direct | |||
| Raul E. Cesan | IT | Common Stock | Options Exercise | 1.03% | 551 | 53,896 | 29 May 2026 | Direct | ||
| Raul E. Cesan | IT | Restricted Stock Units | Options Exercise | -100% | -551 | 0 | 29 May 2026 | Direct | ||
| Stephen G. Pagliuca | IT | Common Stock | Options Exercise | 0.49% | 551 | 112,415 | 29 May 2026 | Direct | ||
| Stephen G. Pagliuca | IT | Restricted Stock Units | Options Exercise | -100% | -551 | 0 | 29 May 2026 | Direct | ||
| William O Grabe | IT | Common Stock | Options Exercise | 112.2% | 551 | 1,042 | 29 May 2026 | Direct | ||
| William O Grabe | IT | Restricted Stock Units | Options Exercise | -100% | -551 | 0 | 29 May 2026 | Direct | ||
| Daniela L. Rus | IT | Common Stock | Options Exercise | 507 | 507 | 29 May 2026 | Direct | |||
| Daniela L. Rus | IT | Restricted Stock Units | Options Exercise | -100% | -507 | 0 | 29 May 2026 | Direct | ||
| Jose M. Gutierrez | IT | Common Stock | Options Exercise | 24.1% | 551 | 2,839 | 29 May 2026 | Direct | ||
| Jose M. Gutierrez | IT | Restricted Stock Units | Options Exercise | -100% | -551 | 0 | 29 May 2026 | Direct | ||
| Karen E. Dykstra | IT | Common Stock | Options Exercise | 3.24% | 551 | 17,551 | 29 May 2026 | Direct | ||
| Karen E. Dykstra | IT | Restricted Stock Units | Options Exercise | -100% | -551 | 0 | 29 May 2026 | Direct | ||
| Edward Peter Bousa | IT | Common Stock | Options Exercise | 507 | 507 | 29 May 2026 | Direct | |||
| Edward Peter Bousa | IT | Restricted Stock Units | Options Exercise | -100% | -507 | 0 | 29 May 2026 | Direct | ||
| Anne Sutherland Fuchs | IT | Common Stock | Options Exercise | 6.63% | 551 | 8,857 | 29 May 2026 | Direct | ||
| Anne Sutherland Fuchs | IT | Restricted Stock Units | Options Exercise | -100% | -551 | 0 | 29 May 2026 | Direct | ||
| Eileen Serra | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Raul E. Cesan | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Richard J. Bressler | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Stephen G. Pagliuca | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| William O Grabe | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Diana S. Ferguson | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Daniela L. Rus | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Jose M. Gutierrez | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Karen E. Dykstra | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Peter Bisson | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Edward Peter Bousa | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Anne Sutherland Fuchs | IT | Restricted Stock Units | Award | 1,489 | 1,489 | 28 May 2026 | Direct | |||
| Raul E. Cesan | IT | Common Stock | Other | -64% | -18,500 | 10,400 | 11 May 2026 | Family Trust #2 | ||
| Raul E. Cesan | IT | Common Stock | Other | 75.2% | 22,900 | 53,345 | 11 May 2026 | Direct | ||
| Raul E. Cesan | IT | Common Stock | Other | -23.9% | -4,400 | 14,000 | 11 May 2026 | Family Trust #1 | ||
| Thomas Sang Kim | IT | Common Stock | Tax liability | -8.77% | -355 | 3,693 | 04 May 2026 | Direct | ||
| Thomas Sang Kim | IT | Common Stock | Options Exercise | 38.7% | 1,130 | 4,048 | 04 May 2026 | Direct | ||
| Thomas Sang Kim | IT | Restricted Stock Units | Options Exercise | -50% | -1,130 | 1,130 | 04 May 2026 | Direct | ||
| Edward Peter Bousa | IT | Common Stock Equivalent (CSE) | Award | 117 | 117 | 01 Apr 2026 | Direct | |||
| Peter Bisson | IT | Common Stock Equivalent (CSE) | Award | 4.61% | 170 | 3,857 | 01 Apr 2026 | Direct | ||
| William O Grabe | IT | Common Stock | Other | 47% | 157 | 491 | 01 Apr 2026 | Direct | ||
| William O Grabe | IT | Common Stock Equivalents (CSE) | Other | -0.33% | -157 | 47,197 | 01 Apr 2026 | Direct | ||
| William O Grabe | IT | Common Stock Equivalents (CSE) | Award | 0.33% | 157 | 47,354 | 01 Apr 2026 | Direct | ||
| Daniela L. Rus | IT | Common Stock Equivalent (CSE) | Award | 108 | 108 | 01 Apr 2026 | Direct | |||
| Diana S. Ferguson | IT | Common Stock | Other | 7.15% | 174 | 2,606 | 01 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.