CSX Corporation
AT ˙ WBAG ˙ US1264081035
39,57 € ↓ -0,70 (-1,75%)
2026-06-04
DEL PRIS
SecurityAT:CSX / CSX Corporation
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership503,600 shares
Latest Disclosed Value $ 20,672,780
Renaissance Technologies Llc ownership in CSX / CSX Corporation

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 503,600 shares of CSX Corporation (AT:CSX) valued at $17,593,266 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 13, 2024 disclosing 0 shares of CSX Corporation. The current value of the position is $19,927,452 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)
2026-05-14 2026-03-31 13F CSX COM 126408103 503,600 503,600 20,673 0.0323
2024-11-13 2024-09-30 13F CSX COM 126408103 0 -894,100 -100.00 0 -100.00
2024-08-09 2024-06-30 13F CSX COM 126408103 894,100 99,600 12.54 29,908 103,027.59 0.0507
2024-05-13 2024-03-31 13F CSX COM 126408103 794,500 469,700 144.61 29 163.64 0.0463
2024-02-13 2023-12-31 13F CSX COM 126408103 324,800 324,800 11 0.0174
2023-08-11 2023-06-30 13F CSX COM 126408103 0 -4,715,800 -100.00 0 -100.00
2023-05-12 2023-03-31 13F CSX COM 126408103 4,715,800 1,000,300 26.92 141 22.61 0.1874
2023-02-13 2022-12-31 13F CSX COM 126408103 3,715,500 -6,653,000 -64.17 115 -99.96 0.1575
2022-11-14 2022-09-30 13F CSX COM 126408103 10,368,500 -1,161,000 -10.07 276,217 -17.56 0.3908
2022-08-12 2022-06-30 13F CSX COM 126408103 11,529,500 5,151,100 80.76 335,047 40.26 0.3967
2022-05-13 2022-03-31 13F CSX COM 126408103 6,378,400 -161,473 -2.47 238,871 -2.86 0.2803
2022-02-11 2021-12-31 13F CSX COM 126408103 6,539,873 1,033,773 18.78 245,899 50.17 0.3059
2021-11-12 2021-09-30 13F CSX COM 126408103 5,506,100 -3,055,300 -35.69 163,751 -40.38 0.2115
2021-08-13 2021-06-30 13F CSX COM 126408103 8,561,400 8,210,800 2,341.93 274,650 712.45 0.3429
2021-05-13 2021-03-31 13F CSX COM 126408103 350,600 350,600 33,805 0.0421
2021-02-10 2020-12-31 13F CSX COM 126408103 0 -29,701 -100.00 0 -100.00
2020-11-13 2020-09-30 13F CSX COM 126408103 29,701 -1,240,223 -97.66 2,307 -97.40 0.0023
2020-08-13 2020-06-30 13F CSX COM 126408103 1,269,924 -2,694,201 -67.96 88,564 -61.01 0.0765
2020-05-14 2020-03-31 13F CSX COM 126408103 3,964,125 -750,100 -15.91 227,144 -33.41 0.2206
2020-02-13 2019-12-31 13F CSX COM 126408103 4,714,225 2,102,519 80.50 341,121 88.56 0.2621
2019-11-13 2019-09-30 13F CSX COM 126408103 2,611,706 -425,194 -14.00 180,913 -23.00 0.1531
2019-08-12 2019-06-30 13F CSX COM 126408103 3,036,900 2,231,500 277.07 234,965 289.92 0.2069
2019-05-14 2019-03-31 13F CSX COM 126408103 805,400 -205,600 -20.34 60,260 -4.06 0.0548
2019-02-12 2018-12-31 13F CSX COM 126408103 1,011,000 183,900 22.23 62,813 2.56 0.0688
2018-11-13 2018-09-30 13F CSX COM 126408103 827,100 714,200 632.60 61,247 750.53 0.0630
2018-08-13 2018-06-30 13F/A-1 CSX COM 126408103 112,900 500 0.44 7,201 37.63 0.0078
2017-05-12 2017-03-31 13F CSX COM 126408103 112,400 112,400 5,232 0.0073
2016-02-11 2015-12-31 13F CSX COM 126408103 0 -1,137,300 -100.00 0 -100.00
2015-11-12 2015-09-30 13F CSX COM 126408103 1,137,300 1,137,300 0.00 30,593 0.0730
2015-08-14 2015-06-30 13F CSX COM 126408103 0 -862,200 -100.00 0 -100.00
2015-05-13 2015-03-31 13F CSX COM 126408103 862,200 862,200 17.87 28,556 68.34 0.0608
2013-11-13 2013-09-30 13F CSX COM 126408103 0 -731,500 -100.00 0 -100.00
2013-08-12 2013-06-30 13F CSX COM 126408103 731,500 731,500 16,963 0.0445
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.