Gartner, Inc.
MX ˙ BMV ˙ US3666511072
SecurityMX:IT / Gartner, Inc.
InstitutionAdage Capital Partners Gp, L.l.c.
ManagerPhil Gross, Robert Atchinson
Latest Disclosed Ownership40,900 shares
Latest Disclosed Value $ 6,476,106
Adage Capital Partners Gp, L.l.c. reports 37.17% decrease in ownership of IT / Gartner, Inc.

On May 15, 2026 - Adage Capital Partners Gp, L.l.c. filed a 13F-HR form disclosing ownership of 40,900 shares of Gartner, Inc. (MX:IT) valued at $6,476,106 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 65,100 shares of Gartner, Inc.. This represents a change in shares of -37.17% 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)
2026-05-15 2026-03-31 13F GARTNER COM 366651107 40,900 -24,200 -37.17 6,476 -60.57 0.0100
2026-02-17 2025-12-31 13F GARTNER COM 366651107 65,100 -3,800 -5.52 16,423 -9.32 0.0249
2025-11-14 2025-09-30 13F GARTNER COM 366651107 68,900 3,400 5.19 18,112 -31.59 0.0287
2025-08-14 2025-06-30 13F GARTNER COM 366651107 65,500 -4,600 -6.56 26,476 -10.02 0.0446
2025-05-15 2025-03-31 13F GARTNER COM 366651107 70,100 -2,000 -2.77 29,424 -15.77 0.0545
2025-02-14 2024-12-31 13F GARTNER COM 366651107 72,100 -500 -0.69 34,930 -5.06 0.0611
2024-11-14 2024-09-30 13F GARTNER COM 366651107 72,600 -1,900 -2.55 36,791 9.97 0.0650
2024-08-14 2024-06-30 13F GARTNER COM 366651107 74,500 -2,000 -2.61 33,455 -8.26 0.0619
2024-05-15 2024-03-31 13F GARTNER COM 366651107 76,500 800 1.06 36,465 6.78 0.0688
2024-02-14 2023-12-31 13F GARTNER COM 366651107 75,700 -2,700 -3.44 34,149 26.76 0.0707
2023-11-14 2023-09-30 13F GARTNER COM 366651107 78,400 -400 -0.51 26,939 -2.41 0.0611
2023-08-14 2023-06-30 13F GARTNER COM 366651107 78,800 -300 -0.38 27,604 7.13 0.0600
2023-05-15 2023-03-31 13F GARTNER COM 366651107 79,100 -1,300 -1.62 25,768 -4.65 0.0578
2023-02-14 2022-12-31 13F GARTNER COM 366651107 80,400 -200 -0.25 27,026 21.18 0.0646
2022-11-14 2022-09-30 13F GARTNER COM 366651107 80,600 -3,300 -3.93 22,301 9.91 0.0553
2022-08-15 2022-06-30 13F GARTNER COM 366651107 83,900 -2,000 -2.33 20,290 -20.59 0.0465
2022-05-16 2022-03-31 13F GARTNER COM 366651107 85,900 18,300 27.07 25,552 13.06 0.0485
2022-02-14 2021-12-31 13F GARTNER COM 366651107 67,600 -20,700 -23.44 22,600 -15.78 0.0407
2021-11-15 2021-09-30 13F GARTNER COM 366651107 88,300 -8,800 -9.06 26,833 14.10 0.0528
2021-08-16 2021-06-30 13F GARTNER COM 366651107 97,100 -2,200 -2.22 23,518 29.74 0.0461
2021-05-17 2021-03-31 13F GARTNER COM 366651107 99,300 1,100 1.12 18,127 15.23 0.0370
2021-02-16 2020-12-31 13F GARTNER COM 366651107 98,200 -200 -0.20 15,731 27.95 0.0343
2020-11-16 2020-09-30 13F GARTNER COM 366651107 98,400 11,800 13.63 12,295 17.02 0.0308
2020-08-14 2020-06-30 13F GARTNER COM 366651107 86,600 -12,200 -12.35 10,507 6.80 0.0269
2020-05-15 2020-03-31 13F GARTNER COM 366651107 98,800 14,700 17.48 9,838 -24.09 0.0294
2020-02-14 2019-12-31 13F GARTNER COM 366651107 84,100 -26,150 -23.72 12,960 -17.79 0.0318
2019-11-14 2019-09-30 13F GARTNER COM 366651107 110,250 -1,000 -0.90 15,765 -11.95 0.0387
2019-08-14 2019-06-30 13F GARTNER COM 366651107 111,250 24,800 28.69 17,905 36.54 0.0446
2019-05-15 2019-03-31 13F GARTNER COM 366651107 86,450 -24,300 -21.94 13,113 -7.38 0.0328
2019-02-14 2018-12-31 13F GARTNER COM 366651107 110,750 -5,500 -4.73 14,158 -23.16 0.0392
2018-11-14 2018-09-30 13F GARTNER COM 366651107 116,250 -4,950 -4.08 18,426 14.40 0.0411
2018-08-14 2018-06-30 13F GARTNER COM 366651107 121,200 56,600 87.62 16,107 111.99 0.0369
2018-05-15 2018-03-31 13F GARTNER COM 366651107 64,600 -63,100 -49.41 7,598 -51.69 0.0177
2018-02-14 2017-12-31 13F GARTNER COM 366651107 127,700 0 0.00 15,726 -1.01 0.0356
2017-11-14 2017-09-30 13F GARTNER COM 366651107 127,700 -1,300 -1.01 15,887 -0.29 0.0386
2017-08-14 2017-06-30 13F GARTNER COM 366651107 129,000 129,000 15,933 0.0390
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.