GATX Corporation
US ˙ ARCX ˙ US3614481030

SecurityGMT / GATX Corporation
InstitutionCitigroup Inc
Latest Disclosed Ownership11,405 shares
Latest Disclosed Value $ 1,947,289
Citigroup Inc reports 29.74% decrease in ownership of GMT / GATX Corporation

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 11,405 shares of GATX Corporation (US:GMT) valued at $1,947,289 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 16,233 shares of GATX Corporation. This represents a change in shares of -29.74% 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 GATX COM 361448103 11,405 -4,828 -29.74 1,947 -29.28 0.0004
2026-02-13 2025-12-31 13F GATX COM 361448103 16,233 3,851 31.10 2,753 27.22 0.0012
2025-11-10 2025-09-30 13F GATX COM 361448103 12,382 -3,783 -23.40 2,164 -12.81 0.0010
2025-08-11 2025-06-30 13F GATX COM 361448103 16,165 -13,955 -46.33 2,482 -46.92 0.0012
2025-05-12 2025-03-31 13F GATX COM 361448103 30,120 -4,100 -11.98 4,677 -11.81 0.0024
2025-02-12 2024-12-31 13F GATX COM 361448103 34,220 4,618 15.60 5,303 35.26 0.0031
2024-11-12 2024-09-30 13F GATX COM 361448103 29,602 20,045 209.74 3,921 210.13 0.0023
2024-08-12 2024-06-30 13F GATX COM 361448103 9,557 1,725 22.03 1,265 20.50 0.0008
2024-05-10 2024-03-31 13F GATX COM 361448103 7,832 1,613 25.94 1,050 40.43 0.0007
2024-02-09 2023-12-31 13F GATX COM 361448103 6,219 3,128 101.20 748 122.32 0.0005
2023-12-06 2023-09-30 13F/A-1 GATX COM 361448103 3,091 -11,653 -79.04 336 -82.30 0.0003
2023-11-09 2023-09-30 13F GATX COM 361448103 3,091 -11,653 336 0.0001
2023-08-10 2023-06-30 13F GATX COM 361448103 14,744 434 3.03 1,898 20.58 0.0012
2023-05-11 2023-03-31 13F GATX COM 361448103 14,310 7,276 103.44 1,574 110.71 0.0011
2023-02-09 2022-12-31 13F GATX COM 361448103 7,034 -3,930 -35.84 748 -19.94 0.0006
2022-11-10 2022-09-30 13F GATX COM 361448103 10,964 2,782 34.00 933 21.17 0.0007
2022-08-10 2022-06-30 13F GATX COM 361448103 8,182 2,023 32.85 770 1.32 0.0006
2022-05-12 2022-03-31 13F GATX COM 361448103 6,159 -7,941 -56.32 760 -48.23 0.0005
2022-02-10 2021-12-31 13F GATX COM 361448103 14,100 6,895 95.70 1,468 127.24 0.0008
2021-11-10 2021-09-30 13F GATX COM 361448103 7,205 -12,089 -62.66 646 -62.16 0.0004
2021-08-10 2021-06-30 13F GATX COM 361448103 19,294 9,718 101.48 1,707 92.45 0.0010
2021-05-13 2021-03-31 13F GATX COM 361448103 9,576 -7,074 -42.49 887 -35.96 0.0006
2021-02-11 2020-12-31 13F GATX COM 361448103 16,650 2,613 18.62 1,385 54.75 0.0008
2020-11-12 2020-09-30 13F GATX COM 361448103 14,037 -5,629 -28.62 895 -25.35 0.0006
2020-08-12 2020-06-30 13F GATX COM 361448103 19,666 -1,204 -5.77 1,199 -8.12 0.0009
2020-05-12 2020-03-31 13F GATX COM 361448103 20,870 4,933 30.95 1,305 -1.14 0.0012
2020-02-12 2019-12-31 13F GATX COM 361448103 15,937 929 6.19 1,320 13.40 0.0010
2019-11-08 2019-09-30 13F GATX COM 361448103 15,008 1,498 11.09 1,164 8.58 0.0009
2019-08-12 2019-06-30 13F GATX COM 361448103 13,510 -5,905 -30.41 1,072 -27.71 0.0009
2019-05-13 2019-03-31 13F GATX COM 361448103 19,415 -4,348 -18.30 1,483 -11.83 0.0014
2019-02-12 2018-12-31 13F GATX COM 361448103 23,763 -13,614 -36.42 1,682 -48.04 0.0017
2018-11-13 2018-09-30 13F GATX COM 361448103 37,377 -4,287 -10.29 3,237 4.66 0.0029
2018-08-10 2018-06-30 13F GATX COM 361448103 41,664 2,161 5.47 3,093 14.34 0.0028
2018-05-11 2018-03-31 13F GATX COM 361448103 39,503 1,333 3.49 2,705 14.04 0.0022
2018-02-12 2017-12-31 13F GATX COM 361448103 38,170 9,353 32.46 2,372 33.71 0.0019
2017-11-13 2017-09-30 13F GATX COM 361448103 28,817 11,200 63.57 1,774 56.58 0.0015
2017-08-11 2017-06-30 13F GATX COM 361448103 17,617 -1,071 -5.73 1,133 -0.53 0.0010
2017-05-12 2017-03-31 13F GATX COM 361448103 18,688 -48,522 -72.19 1,139 -72.48 0.0010
2017-02-10 2016-12-31 13F GATX COM 361448103 67,210 39,042 138.60 4,139 229.80 0.0037
2016-11-10 2016-09-30 13F GATX COM 361448103 28,168 -7,101 -20.13 1,255 -19.08 0.0012
2016-08-12 2016-06-30 13F GATX COM 361448103 35,269 28,018 386.40 1,551 349.57 0.0016
2016-05-13 2016-03-31 13F GATX COM 361448103 7,251 -151 -2.04 345 9.52 0.0004
2016-02-12 2015-12-31 13F GATX COM 361448103 7,402 1,596 27.49 315 22.57 0.0003
2015-11-13 2015-09-30 13F GATX COM 361448103 5,806 -368 -5.96 257 -21.65 0.0002
2015-08-13 2015-06-30 13F GATX COM 361448103 6,174 -13,444 -68.53 328 -71.18 0.0003
2015-05-14 2015-03-31 13F GATX COM 361448103 19,618 1,194 6.48 1,138 7.36 0.0011
2015-02-17 2014-12-31 13F GATX COM 361448103 18,424 3,671 24.88 1,060 23.11 0.0009
2014-11-14 2014-09-30 13F GATX COM 361448103 14,753 -363 -2.40 861 -14.92 0.0008
2014-08-14 2014-06-30 13F GATX COM 361448103 15,116 8,375 124.24 1,012 120.96 0.0010
2014-05-15 2014-03-31 13F GATX COM 361448103 6,741 -16,975 -71.58 458 -62.97 0.0005
2014-02-14 2013-12-31 13F GATX COM 361448103 23,716 17,609 288.34 1,237 326.55 0.0011
2013-11-14 2013-09-30 13F GATX COM 361448103 6,107 851 16.19 290 16.47 0.0003
2013-08-14 2013-06-30 13F GATX COM 361448103 5,256 5,256 249 0.0002
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.