CSX Corporation
AT ˙ WBAG ˙ US1264081035
40,74 € ↑1,16 (2,94%)
2026-06-05
DEL PRIS
SecurityAT:CSX / CSX Corporation
InstitutionPrimecap Management Co/ca/
Latest Disclosed Ownership1,634,900 shares
Latest Disclosed Value $ 67,112,645
Primecap Management Co/ca/ reports 25.42% decrease in ownership of CSX / CSX Corporation

On May 11, 2026 - Primecap Management Co/ca/ filed a 13F-HR form disclosing ownership of 1,634,900 shares of CSX Corporation (AT:CSX) valued at $57,115,232 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 2,192,000 shares of CSX Corporation. This represents a change in shares of -25.42% during the quarter. The current value of the position is $66,597,652 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.

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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 CSX COM 126408103 1,634,900 -557,100 -25.42 67,113 -15.54 0.0528
2026-02-11 2025-12-31 13F CSX COM 126408103 2,192,000 0 0.00 79,460 2.09 0.0601
2025-11-12 2025-09-30 13F CSX COM 126408103 2,192,000 -10,000 -0.45 77,838 8.33 0.0596
2025-08-11 2025-06-30 13F CSX COM 126408103 2,202,000 -35,000 -1.56 71,851 9.14 0.0569
2025-05-09 2025-03-31 13F CSX COM 126408103 2,237,000 -2,600 -0.12 65,835 -8.91 0.0544
2025-02-10 2024-12-31 13F CSX COM 126408103 2,239,600 -90,800 -3.90 72,272 -10.19 0.0560
2024-11-08 2024-09-30 13F CSX COM 126408103 2,330,400 0 0.00 80,469 3.23 0.0592
2024-08-09 2024-06-30 13F CSX COM 126408103 2,330,400 -169,500 -6.78 77,952 -15.88 0.0564
2024-05-14 2024-03-31 13F CSX COM 126408103 2,499,900 -799,700 -24.24 92,671 -18.99 0.0691
2024-02-09 2023-12-31 13F CSX COM 126408103 3,299,600 0 0.00 114,397 12.75 0.0906
2023-11-13 2023-09-30 13F CSX COM 126408103 3,299,600 88,000 2.74 101,463 -7.35 0.0856
2023-08-11 2023-06-30 13F CSX COM 126408103 3,211,600 -799,400 -19.93 109,516 -8.81 0.0915
2023-05-15 2023-03-31 13F CSX COM 126408103 4,011,000 -18,300 -0.45 120,089 -3.80 0.1047
2023-02-13 2022-12-31 13F CSX COM 126408103 4,029,300 0 0.00 124,828 16.29 0.1143
2022-11-14 2022-09-30 13F CSX COM 126408103 4,029,300 0 0.00 107,341 -8.33 0.1039
2022-08-11 2022-06-30 13F CSX COM 126408103 4,029,300 0 0.00 117,091 -22.40 0.1047
2022-05-11 2022-03-31 13F CSX COM 126408103 4,029,300 -13,100 -0.32 150,897 -0.72 0.1138
2022-02-11 2021-12-31 13F CSX COM 126408103 4,042,400 -190,000 -4.49 151,994 20.75 0.1052
2021-11-12 2021-09-30 13F CSX COM 126408103 4,232,400 0 0.00 125,872 -7.29 0.0888
2021-08-10 2021-06-30 13F CSX COM 126408103 4,232,400 2,643,300 166.34 135,775 -11.39 0.0912
2021-05-14 2021-03-31 13F CSX COM 126408103 1,589,100 -7,700 -0.48 153,221 5.74 0.1068
2021-02-08 2020-12-31 13F CSX COM 126408103 1,596,800 10,200 0.64 144,910 17.59 0.1077
2020-11-13 2020-09-30 13F CSX COM 126408103 1,586,600 372,200 30.65 123,231 45.50 0.1017
2020-08-13 2020-06-30 13F CSX COM 126408103 1,214,400 214,000 21.39 84,692 47.75 0.0727
2020-05-14 2020-03-31 13F CSX COM 126408103 1,000,400 266,200 36.26 57,323 7.90 0.0562
2020-02-14 2019-12-31 13F CSX COM 126408103 734,200 0 0.00 53,127 4.46 0.0385
2019-11-13 2019-09-30 13F CSX COM 126408103 734,200 -460,000 -38.52 50,858 -44.96 0.0407
2019-08-14 2019-06-30 13F CSX COM 126408103 1,194,200 0 0.00 92,395 3.41 0.0683
2019-05-14 2019-03-31 13F CSX COM 126408103 1,194,200 -578,000 -32.61 89,350 -18.85 0.0658
2019-02-12 2018-12-31 13F CSX COM 126408103 1,772,200 -10,000 -0.56 110,107 -16.57 0.0892
2018-11-13 2018-09-30 13F CSX COM 126408103 1,782,200 0 0.00 131,972 16.10 0.0891
2018-08-13 2018-06-30 13F CSX COM 126408103 1,782,200 -1,079,700 -37.73 113,669 -28.71 0.0843
2018-05-14 2018-03-31 13F CSX COM 126408103 2,861,900 4,000 0.14 159,436 1.41 0.1196
2018-02-13 2017-12-31 13F CSX COM 126408103 2,857,900 -1,056,550 -26.99 157,213 -25.98 0.1206
2017-11-13 2017-09-30 13F CSX COM 126408103 3,914,450 -701,450 -15.20 212,398 -15.66 0.1758
2017-08-11 2017-06-30 13F CSX COM 126408103 4,615,900 45,525 1.00 251,844 18.38 0.2163
2017-05-12 2017-03-31 13F CSX COM 126408103 4,570,375 -387,225 -7.81 212,751 19.44 0.1931
2017-02-13 2016-12-31 13F CSX COM 126408103 4,957,600 -26,250 -0.53 178,127 17.18 0.1753
2016-11-14 2016-09-30 13F CSX COM 126408103 4,983,850 -41,725 -0.83 152,007 15.98 0.1517
2016-08-12 2016-06-30 13F CSX COM 126408103 5,025,575 231,625 4.83 131,067 6.18 0.1396
2016-05-12 2016-03-31 13F CSX COM 126408103 4,793,950 228,350 5.00 123,444 4.19 0.1280
2016-02-12 2015-12-31 13F CSX COM 126408103 4,565,600 208,350 4.78 118,477 1.08 0.1211
2015-11-12 2015-09-30 13F CSX COM 126408103 4,357,250 -251,075 -5.45 117,210 -22.10 0.1301
2015-08-13 2015-06-30 13F CSX COM 126408103 4,608,325 290,300 6.72 150,462 5.21 0.1480
2015-05-14 2015-03-31 13F CSX COM 126408103 4,318,025 910,325 26.71 143,013 15.84 0.1397
2015-02-12 2014-12-31 13F CSX COM 126408103 3,407,700 187,200 5.81 123,461 19.58 0.1251
2014-11-13 2014-09-30 13F CSX COM 126408103 3,220,500 130,083 4.21 103,249 8.44 0.1105
2014-08-14 2014-06-30 13F CSX COM 126408103 3,090,417 1,782,900 136.36 95,216 151.37 0.1043
2014-05-14 2014-03-31 13F CSX COM 126408103 1,307,517 46,300 3.67 37,879 4.39 0.0429
2014-02-13 2013-12-31 13F CSX COM 126408103 1,261,217 39,617 3.24 36,285 15.40 0.0436
2013-11-13 2013-09-30 13F CSX COM 126408103 1,221,600 10,000 0.83 31,444 11.91 0.0414
2013-08-14 2013-06-30 13F CSX COM 126408103 1,211,600 1,211,600 28,097 0.0402
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.