Gartner, Inc.
US ˙ NYSE ˙ US3666511072

SecurityIT / Gartner, Inc.
InstitutionCornerstone Advisory, LLC
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Cornerstone Advisory, LLC closes position in IT / Gartner, Inc.

On November 7, 2025 - Cornerstone Advisory, LLC filed a 13F-HR form disclosing ownership of 0 shares of Gartner, Inc. (US:IT) valued at $0 USD as of September 30, 2025. The entity filed a previous 13F-HR on July 30, 2025 disclosing 2,774 shares of Gartner, Inc.. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-11-07 2025-09-30 13F GARTNER COM 366651107 0 -100.00 0
2025-07-30 2025-06-30 13F GARTNER COM 366651107 2,774 -4 -0.14 1,121 -6.74 0.1204
2025-05-07 2025-03-31 13F GARTNER COM 366651107 2,778 -25 -0.89 1,203 -16.64 0.1404
2025-02-18 2024-12-31 13F GARTNER COM 366651107 2,803 21 0.75 1,443 2.34 0.1639
2024-11-12 2024-09-30 13F GARTNER COM 366651107 2,782 16 0.58 1,410 13.45 0.1229
2024-08-14 2024-06-30 13F GARTNER COM 366651107 2,766 -126 -4.36 1,242 -9.87 0.1747
2024-05-08 2024-03-31 13F GARTNER COM 366651107 2,892 13 0.45 1,379 6.16 0.1965
2024-02-13 2023-12-31 13F GARTNER COM 366651107 2,879 0 0.00 1,299 31.24 0.2025
2023-11-14 2023-09-30 13F GARTNER COM 366651107 2,879 9 0.31 989 -1.59 0.1731
2023-07-20 2023-06-30 13F GARTNER COM 366651107 2,870 -94 -3.17 1,005 4.15 0.1766
2023-05-04 2023-03-31 13F GARTNER COM 366651107 2,964 -127 -4.11 966 -7.12 0.1739
2023-02-13 2022-12-31 13F GARTNER COM 366651107 3,091 1 0.03 1,039 21.52 0.2047
2022-10-26 2022-09-30 13F GARTNER COM 366651107 3,090 -6 -0.19 855 14.15 0.1909
2022-08-02 2022-06-30 13F GARTNER COM 366651107 3,096 0 0.00 749 -18.68 0.1714
2022-05-20 2022-03-31 13F GARTNER COM 366651107 3,096 -259 -7.72 921 -17.91 0.1404
2022-02-23 2021-12-31 13F GARTNER COM 366651107 3,355 0 0.00 1,122 10.00 0.1613
2021-11-16 2021-09-30 13F GARTNER COM 366651107 3,355 -287 -7.88 1,020 15.65 0.1689
2021-08-16 2021-06-30 13F GARTNER COM 366651107 3,642 -205 -5.33 882 25.64 0.1486
2021-05-13 2021-03-31 13F GARTNER COM 366651107 3,847 0 0.00 702 13.96 0.1328
2021-05-11 2020-12-31 13F GARTNER COM 366651107 3,847 17 0.44 616 28.60 0.1247
2020-11-12 2020-09-30 13F GARTNER COM 366651107 3,830 0 0.00 479 3.01 0.1117
2020-08-10 2020-06-30 13F GARTNER COM 366651107 3,830 0 0.00 465 22.05 0.1213
2020-05-11 2020-03-31 13F GARTNER COM 366651107 3,830 6 0.16 381 -35.31 0.1158
2020-02-12 2019-12-31 13F GARTNER COM 366651107 3,824 -48 -1.24 589 6.32 0.1220
2019-11-12 2019-09-30 13F GARTNER COM 366651107 3,872 0 0.00 554 -11.08 0.1195
2019-08-08 2019-06-30 13F GARTNER COM 366651107 3,872 0 0.00 623 6.13 0.1350
2019-05-08 2019-03-31 13F GARTNER COM 366651107 3,872 0 0.00 587 18.59 0.1291
2019-02-12 2018-12-31 13F GARTNER COM 366651107 3,872 0 0.00 495 -19.38 0.1299
2018-11-13 2018-09-30 13F GARTNER COM 366651107 3,872 0 0.00 614 19.22 0.1821
2018-08-09 2018-06-30 13F GARTNER COM 366651107 3,872 -667 -14.69 515 -3.56 0.1695
2018-05-10 2018-03-31 13F GARTNER COM 366651107 4,539 -108 -2.32 534 -6.64 0.1923
2018-02-09 2017-12-31 13F GARTNER COM 366651107 4,647 0 0.00 572 -1.04 0.1960
2017-11-14 2017-09-30 13F GARTNER COM 366651107 4,647 0 0.00 578 0.70 0.1956
2017-08-08 2017-06-30 13F GARTNER COM 366651107 4,647 0 0.00 574 14.34 0.1921
2017-05-15 2017-03-31 13F GARTNER COM 366651107 4,647 0 0.00 502 6.81 0.2534
2017-02-13 2016-12-31 13F GARTNER COM 366651107 4,647 0 0.00 470 14.36 0.3527
2016-11-10 2016-09-30 13F GARTNER COM 366651107 4,647 0 0.00 411 -9.27 0.3375
2016-08-10 2016-06-30 13F GARTNER COM 366651107 4,647 0 0.00 453 9.16 0.3808
2016-05-16 2016-03-31 13F GARTNER COM 366651107 4,647 0 0.00 415 -1.43 0.3545
2016-03-03 2015-12-31 13F GARTNER COM 366651107 4,647 4,647 421 0.3625
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.