Gartner, Inc.
US ˙ NYSE ˙ US3666511072

SecurityIT / Gartner, Inc.
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership31,319 shares
Latest Disclosed Value $ 4,959,050
Asset Management One Co., Ltd. reports 4.21% decrease in ownership of IT / Gartner, Inc.

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 31,319 shares of Gartner, Inc. (US:IT) valued at $4,959,050 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 32,696 shares of Gartner, Inc.. This represents a change in shares of -4.21% during the quarter. The current value of the position is $5,159,805 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)
2026-05-08 2026-03-31 13F GARTNER COM 366651107 31,319 -1,377 -4.21 4,959 -40.23 0.0146
2026-01-27 2025-12-31 13F GARTNER COM 366651107 32,696 -272 -0.83 8,298 -4.26 0.0231
2025-10-22 2025-09-30 13F GARTNER COM 366651107 32,968 -13,058 -28.37 8,666 -53.41 0.0251
2025-07-31 2025-06-30 13F GARTNER COM 366651107 46,026 -18,542 -28.72 18,602 -31.31 0.0583
2025-04-23 2025-03-31 13F GARTNER COM 366651107 64,568 -4,869 -7.01 27,080 -19.85 0.0937
2025-01-30 2024-12-31 13F GARTNER COM 366651107 69,437 -3,255 -4.48 33,788 -8.37 0.1161
2024-10-30 2024-09-30 13F GARTNER COM 366651107 72,692 -886 -1.20 36,875 11.88 0.1312
2024-07-18 2024-06-30 13F GARTNER COM 366651107 73,578 -1,596 -2.12 32,960 -8.02 0.1261
2024-05-02 2024-03-31 13F GARTNER COM 366651107 75,174 -3,490 -4.44 35,833 0.72 0.1381
2024-01-24 2023-12-31 13F GARTNER COM 366651107 78,664 -10,702 -11.98 35,577 15.63 0.1432
2023-10-19 2023-09-30 13F GARTNER COM 366651107 89,366 410 0.46 30,768 -0.73 0.1370
2023-07-31 2023-06-30 13F GARTNER COM 366651107 88,956 -1,279 -1.42 30,993 5.91 0.1312
2023-04-25 2023-03-31 13F GARTNER COM 366651107 90,235 3,810 4.41 29,264 -0.46 0.1326
2023-02-06 2022-12-31 13F GARTNER COM 366651107 86,425 -4,975 -5.44 29,399 16.04 0.1433
2022-11-04 2022-09-30 13F GARTNER COM 366651107 91,400 -9,528 -9.44 25,336 4.02 0.1289
2022-07-29 2022-06-30 13F GARTNER COM 366651107 100,928 104 0.10 24,357 -19.14 0.1144
2022-05-13 2022-03-31 13F GARTNER COM 366651107 100,824 -12,178 -10.78 30,122 -20.47 0.1176
2022-02-09 2021-12-31 13F GARTNER COM 366651107 113,002 -2,629 -2.27 37,875 7.36 0.1319
2021-11-02 2021-09-30 13F GARTNER COM 366651107 115,631 -20,468 -15.04 35,278 6.88 0.1352
2021-08-03 2021-06-30 13F GARTNER COM 366651107 136,099 10,031 7.96 33,007 43.66 0.1228
2021-05-14 2021-03-31 13F GARTNER COM 366651107 126,068 11,115 9.67 22,976 26.13 0.0912
2021-02-12 2020-12-31 13F GARTNER COM 366651107 114,953 5,123 4.66 18,216 32.73 0.0750
2020-11-13 2020-09-30 13F GARTNER COM 366651107 109,830 25,351 30.01 13,724 33.88 0.0631
2020-08-14 2020-06-30 13F GARTNER COM 366651107 84,479 3,276 4.03 10,251 26.76 0.0504
2020-05-14 2020-03-31 13F GARTNER COM 366651107 81,203 19,190 30.95 8,087 -15.37 0.0472
2020-02-14 2019-12-31 13F GARTNER COM 366651107 62,013 2,755 4.65 9,556 12.82 0.0431
2019-11-14 2019-09-30 13F GARTNER COM 366651107 59,258 1,219 2.10 8,470 -9.32 0.0408
2019-08-14 2019-06-30 13F GARTNER COM 366651107 58,039 2,860 5.18 9,341 11.59 0.0459
2019-05-15 2019-03-31 13F GARTNER COM 366651107 55,179 -96,370 -63.59 8,371 -56.69 0.0453
2019-02-13 2018-12-31 13F GARTNER COM 366651107 151,549 2,890 1.94 19,330 -18.01 0.0461
2018-11-14 2018-09-30 13F GARTNER COM 366651107 148,659 434 0.29 23,575 19.62 0.0484
2018-08-14 2018-06-30 13F GARTNER COM 366651107 148,225 6,740 4.76 19,709 18.43 0.0431
2018-05-14 2018-03-31 13F GARTNER COM 366651107 141,485 662 0.47 16,642 -4.08 0.0375
2018-02-14 2017-12-31 13F GARTNER COM 366651107 140,823 1,458 1.05 17,349 0.10 0.0383
2017-11-14 2017-09-30 13F GARTNER COM 366651107 139,365 1,804 1.31 17,331 2.00 0.0407
2017-08-14 2017-06-30 13F GARTNER COM 366651107 137,561 9,771 7.65 16,991 23.07 0.0434
2017-05-11 2017-03-31 13F GARTNER COM 366651107 127,790 -11,397 -8.19 13,806 -1.88 0.0362
2017-05-02 2016-12-31 13F/A-1 GARTNER COM 366651107 139,187 108,937 360.12 14,071 427.99 0.0360
2017-02-13 2016-12-31 13F GARTNER COM 366651107 139,187 14,071
2016-11-07 2016-09-30 13F GARTNER Com 366651107 30,250 -948 -3.04 2,665 -10.21 0.0396
2016-08-03 2016-06-30 13F GARTNER Com 366651107 31,198 2,784 9.80 2,968 18.25 0.0445
2016-05-05 2016-03-31 13F GARTNER Com 366651107 28,414 -8,640 -23.32 2,510 -26.41 0.0366
2016-01-28 2015-12-31 13F GARTNER Com 366651107 37,054 -9,275 -20.02 3,411 -12.00 0.0509
2015-11-12 2015-09-30 13F GARTNER Com 366651107 46,329 -6,425 -12.18 3,876 -14.08 0.0590
2015-08-06 2015-06-30 13F GARTNER Com 366651107 52,754 -1,419 -2.62 4,511 -1.10 0.0625
2015-05-11 2015-03-31 13F GARTNER COM 366651107 54,173 -8,228 -13.19 4,561 -14.57 0.0563
2015-02-09 2014-12-31 13F GARTNER COM 366651107 62,401 45,841 276.82 5,339 336.91 0.0693
2014-11-05 2014-09-30 13F GARTNER COM 366651107 16,560 16,560 1,222 0.0169
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.