Gartner, Inc.
MX ˙ BMV ˙ US3666511072
SecurityMX:IT / Gartner, Inc.
InstitutionCalamos Advisors LLC
Latest Disclosed Ownership42,081 shares
Latest Disclosed Value $ 6,663,106
Calamos Advisors LLC ownership in IT / Gartner, Inc.

On May 4, 2026 - Calamos Advisors LLC filed a 13F-HR form disclosing ownership of 42,081 shares of Gartner, Inc. (MX:IT) valued at $6,663,106 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 42,081 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)
2026-05-04 2026-03-31 13F GARTNER COM 366651107 42,081 0 0.00 6,663 -37.24 0.0235
2026-01-29 2025-12-31 13F GARTNER COM 366651107 42,081 -1,709 -3.90 10,616 -7.78 0.0399
2025-10-20 2025-09-30 13F GARTNER COM 366651107 43,790 0 0.00 11,511 -34.97 0.0425
2025-08-08 2025-06-30 13F GARTNER COM 366651107 43,790 0 0.00 17,701 -3.70 0.0697
2025-04-29 2025-03-31 13F GARTNER COM 366651107 43,790 488 1.13 18,380 -12.38 0.0800
2025-01-24 2024-12-31 13F GARTNER COM 366651107 43,302 0 0.00 20,979 -4.40 0.0877
2024-11-07 2024-09-30 13F GARTNER COM 366651107 43,302 -1,062 -2.39 21,944 10.14 0.0949
2024-07-25 2024-06-30 13F GARTNER COM 366651107 44,364 -1,619 -3.52 19,922 -9.11 0.0885
2024-05-08 2024-03-31 13F GARTNER COM 366651107 45,983 -1,157 -2.45 21,919 3.07 0.1038
2024-01-31 2023-12-31 13F GARTNER COM 366651107 47,140 -616 -1.29 21,265 29.59 0.1031
2023-10-26 2023-09-30 13F GARTNER COM 366651107 47,756 0 0.00 16,409 -1.91 0.0853
2023-07-28 2023-06-30 13F GARTNER COM 366651107 47,756 0 0.00 16,729 7.53 0.0828
2023-05-04 2023-03-31 13F GARTNER COM 366651107 47,756 -5,970 -11.11 15,557 -13.85 0.0760
2023-01-26 2022-12-31 13F GARTNER COM 366651107 53,726 -9,499 -15.02 18,059 3.23 0.0847
2022-10-24 2022-09-30 13F GARTNER COM 366651107 63,225 0 0.00 17,494 14.41 0.0800
2022-08-01 2022-06-30 13F GARTNER COM 366651107 63,225 1,702 2.77 15,290 -16.45 0.0659
2022-05-03 2022-03-31 13F GARTNER COM 366651107 61,523 8,200 15.38 18,301 2.66 0.0687
2022-02-01 2021-12-31 13F GARTNER COM 366651107 53,323 2,064 4.03 17,827 14.44 0.0667
2021-10-26 2021-09-30 13F GARTNER COM 366651107 51,259 4,523 9.68 15,577 37.62 0.0680
2021-07-22 2021-06-30 13F GARTNER COM 366651107 46,736 10,629 29.44 11,319 71.73 0.0517
2021-04-12 2021-03-31 13F GARTNER COM 366651107 36,107 1,116 3.19 6,591 17.59 0.0360
2021-01-27 2020-12-31 13F GARTNER COM 366651107 34,991 -1,515 -4.15 5,605 22.89 0.0325
2020-10-26 2020-09-30 13F GARTNER COM 366651107 36,506 -3,204 -8.07 4,561 -5.33 0.0294
2020-07-27 2020-06-30 13F GARTNER COM 366651107 39,710 -2,541 -6.01 4,818 14.52 0.0341
2020-04-28 2020-03-31 13F GARTNER COM 366651107 42,251 -3,612 -7.88 4,207 -40.47 0.0330
2020-01-15 2019-12-31 13F GARTNER COMMON STOCK 366651107 45,863 -749 -1.61 7,067 6.03 0.0349
2019-10-21 2019-09-30 13F GARTNER COMMON STOCK 366651107 46,612 4,049 9.51 6,665 -2.70 0.0363
2019-08-07 2019-06-30 13F GARTNER COMMON STOCK 366651107 42,563 42,563 6,850 0.0380
2019-04-12 2019-03-31 13F GARTNER COMMON STOCK 366651107 0 -1,840 -100.00 0 -100.00
2019-01-24 2018-12-31 13F GARTNER COMMON STOCK 366651107 1,840 0 0.00 235 -19.52 0.0016
2018-10-22 2018-09-30 13F GARTNER COMMON STOCK 366651107 1,840 1,840 292 0.0016
2015-02-13 2014-12-31 13F GARTNER COMMON STOCK 366651107 0 -7,825 -100.00 0 -100.00
2014-11-14 2014-09-30 13F GARTNER COMMON STOCK 366651107 7,825 7,825 575 0.0038
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.