Gartner, Inc.
MX ˙ BMV ˙ US3666511072
SecurityMX:IT / Gartner, Inc.
InstitutionWestfield Capital Management Co Lp
Latest Disclosed Ownership14,370 shares
Latest Disclosed Value $ 2,275,346
Westfield Capital Management Co Lp ownership in IT / Gartner, Inc.

On May 11, 2026 - Westfield Capital Management Co Lp filed a 13F-HR form disclosing ownership of 14,370 shares of Gartner, Inc. (MX:IT) valued at $2,275,346 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 14,370 shares of Gartner, Inc.. This represents a change in shares of 0.00% during the quarter.

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.

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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)
2026-05-11 2026-03-31 13F GARTNER COM 366651107 14,370 0 0.00 2,275 -37.24 0.0095
2026-02-11 2025-12-31 13F GARTNER COM 366651107 14,370 -5 -0.03 3,625 -4.05 0.0151
2025-11-12 2025-09-30 13F GARTNER COM 366651107 14,375 -198,552 -93.25 3,779 -95.61 0.0159
2025-08-12 2025-06-30 13F GARTNER COM 366651107 212,927 198,557 1,381.75 86,069 1,327.11 0.3610
2025-05-09 2025-03-31 13F GARTNER COM 366651107 14,370 0 0.00 6,032 -13.36 0.0294
2025-02-11 2024-12-31 13F GARTNER COM 366651107 14,370 0 0.00 6,962 -4.41 0.0303
2024-11-12 2024-09-30 13F GARTNER COM 366651107 14,370 0 0.00 7,282 12.86 0.0329
2024-08-14 2024-06-30 13F GARTNER COM 366651107 14,370 0 0.00 6,453 -5.80 0.0317
2024-05-10 2024-03-31 13F GARTNER COM 366651107 14,370 0 0.00 6,850 5.66 0.0360
2024-02-09 2023-12-31 13F GARTNER COM 366651107 14,370 0 0.00 6,482 31.29 0.0378
2023-11-13 2023-09-30 13F GARTNER COM 366651107 14,370 0 0.00 4,938 -1.91 0.0336
2023-08-11 2023-06-30 13F GARTNER COM 366651107 14,370 0 0.00 5,034 7.52 0.0320
2023-05-12 2023-03-31 13F GARTNER COM 366651107 14,370 0 0.00 4,681 -3.08 0.0331
2023-02-13 2022-12-31 13F GARTNER COM 366651107 14,370 -198,913 -93.26 4,830 -91.82 0.0373
2022-11-14 2022-09-30 13F GARTNER COM 366651107 213,283 -36,827 -14.72 59,013 -2.43 0.4686
2022-08-12 2022-06-30 13F GARTNER COM 366651107 250,110 47,363 23.36 60,484 0.29 0.4762
2022-05-16 2022-03-31 13F GARTNER COM 366651107 202,747 27,112 15.44 60,309 2.71 0.3865
2022-02-10 2021-12-31 13F GARTNER COM 366651107 175,635 -47,001 -21.11 58,718 -13.21 0.3490
2021-11-12 2021-09-30 13F GARTNER COM 366651107 222,636 -43,390 -16.31 67,655 5.00 0.4080
2021-08-10 2021-06-30 13F GARTNER COM 366651107 266,026 251,656 1,751.26 64,431 2,356.39 0.3859
2021-05-14 2021-03-31 13F GARTNER COM 366651107 14,370 0 0.00 2,623 13.94 0.0163
2021-02-12 2020-12-31 13F GARTNER COM 366651107 14,370 0 0.00 2,302 28.17 0.0137
2020-11-13 2020-09-30 13F GARTNER COM 366651107 14,370 0 0.00 1,796 2.98 0.0116
2020-08-13 2020-06-30 13F GARTNER COM 366651107 14,370 0 0.00 1,744 21.87 0.0120
2020-05-14 2020-03-31 13F GARTNER COM 366651107 14,370 0 0.00 1,431 -35.37 0.0126
2020-02-13 2019-12-31 13F GARTNER COM 366651107 14,370 -12,079 -45.67 2,214 -41.46 0.0158
2019-11-08 2019-09-30 13F GARTNER COM 366651107 26,449 -2,355 -8.18 3,782 -18.42 0.0303
2019-08-13 2019-06-30 13F GARTNER COM 366651107 28,804 -150,901 -83.97 4,636 -82.99 0.0349
2019-05-14 2019-03-31 13F GARTNER COM 366651107 179,705 -46,551 -20.57 27,258 -5.76 0.2074
2019-02-08 2018-12-31 13F GARTNER COM 366651107 226,256 -41,815 -15.60 28,925 -31.92 0.2467
2018-11-14 2018-09-30 13F GARTNER COM 366651107 268,071 -9,235 -3.33 42,489 15.29 0.2983
2018-08-13 2018-06-30 13F GARTNER COM 366651107 277,306 39,151 16.44 36,854 31.57 0.2751
2018-05-14 2018-03-31 13F GARTNER COM 366651107 238,155 -108,345 -31.27 28,012 -34.35 0.2159
2018-02-13 2017-12-31 13F GARTNER COM 366651107 346,500 -13,570 -3.77 42,671 -4.74 0.3260
2017-11-13 2017-09-30 13F GARTNER COM 366651107 360,070 97,440 37.10 44,796 38.10 0.3441
2017-08-11 2017-06-30 13F GARTNER COM 366651107 262,630 54,565 26.22 32,437 44.36 0.2765
2017-05-12 2017-03-31 13F GARTNER COM 366651107 208,065 208,065 -43.03 22,469 2.54 0.1929
2014-02-07 2013-12-31 13F GARTNER INC COM COM 366651107 0 -365,192 -100.00 0 -100.00
2013-11-12 2013-09-30 13F GARTNER INC COM COM 366651107 365,192 -6,350 -1.71 21,912 3.49 0.1401
2013-08-09 2013-06-30 13F GARTNER INC COM COM 366651107 371,542 371,542 21,174 0.1456
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.