CSX Corporation
US ˙ NasdaqGS ˙ US1264081035

SecurityCSX / CSX Corporation
InstitutionAssociated Banc-corp
Latest Disclosed Ownership38,905 shares
Latest Disclosed Value $ 1,597,050
Associated Banc-corp reports 0.10% increase in ownership of CSX / CSX Corporation

On May 1, 2026 - Associated Banc-corp filed a 13F-HR form disclosing ownership of 38,905 shares of CSX Corporation (US:CSX) valued at $1,597,050 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 38,868 shares of CSX Corporation. This represents a change in shares of 0.10% during the quarter. The current value of the position is $1,806,748 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)
2026-05-01 2026-03-31 13F CSX COM 126408103 38,905 37 0.10 1,597 13.42 0.0423
2026-02-06 2025-12-31 13F CSX COM 126408103 38,868 593 1.55 1,409 3.61 0.0361
2025-10-24 2025-09-30 13F CSX COM 126408103 38,275 0 0.00 1,359 8.89 0.0358
2025-08-12 2025-06-30 13F CSX COM 126408103 38,275 -2,109 -5.22 1,249 5.05 0.0354
2025-05-09 2025-03-31 13F CSX COM 126408103 40,384 356 0.89 1,189 -7.98 0.0362
2025-02-10 2024-12-31 13F CSX COM 126408103 40,028 -15,506 -27.92 1,292 -32.66 0.0389
2024-11-13 2024-09-30 13F CSX COM 126408103 55,534 310 0.56 1,918 3.79 0.0564
2024-08-01 2024-06-30 13F CSX COM 126408103 55,224 -177 -0.32 1,847 -10.03 0.0575
2024-05-09 2024-03-31 13F CSX COM 126408103 55,401 0 0.00 2,054 6.93 0.0651
2024-02-09 2023-12-31 13F CSX COM 126408103 55,401 194 0.35 1,921 13.14 0.0667
2023-11-09 2023-09-30 13F CSX COM 126408103 55,207 0 0.00 1,698 -9.83 0.0657
2023-08-07 2023-06-30 13F CSX COM 126408103 55,207 600 1.10 1,883 15.18 0.0711
2023-05-09 2023-03-31 13F CSX COM 126408103 54,607 0 0.00 1,635 -3.37 0.0657
2023-02-10 2022-12-31 13F CSX COM 126408103 54,607 366 0.67 1,692 17.02 0.0704
2022-11-09 2022-09-30 13F CSX COM 126408103 54,241 0 0.00 1,445 -8.31 0.0668
2022-08-10 2022-06-30 13F CSX COM 126408103 54,241 3,600 7.11 1,576 -16.92 0.0690
2022-05-11 2022-03-31 13F CSX COM 126408103 50,641 -305 -0.60 1,897 -0.99 0.0731
2022-02-10 2021-12-31 13F CSX COM 126408103 50,946 0 0.00 1,916 26.47 0.0702
2021-11-08 2021-09-30 13F CSX COM 126408103 50,946 0 0.00 1,515 -7.28 0.0599
2021-08-11 2021-06-30 13F CSX COM 126408103 50,946 33,386 190.13 1,634 62.43 0.0646
2021-05-05 2021-03-31 13F CSX COM 126408103 17,560 -15,422 -46.76 1,006 -66.39 0.0625
2021-02-11 2020-12-31 13F CSX COM 126408103 32,982 0 0.00 2,993 16.82 0.1168
2020-11-12 2020-09-30 13F CSX COM 126408103 32,982 -502 -1.50 2,562 9.72 0.1102
2020-08-14 2020-06-30 13F CSX COM 126408103 33,484 -76 -0.23 2,335 21.42 0.1054
2020-05-14 2020-03-31 13F CSX COM 126408103 33,560 16,000 91.12 1,923 51.30 0.1025
2020-02-12 2019-12-31 13F CSX COM 126408103 17,560 0 0.00 1,271 4.44 0.0633
2019-11-14 2019-09-30 13F CSX COM 126408103 17,560 0 0.00 1,217 -10.38 0.0654
2019-08-06 2019-06-30 13F CSX COM 126408103 17,560 0 0.00 1,358 3.35 0.0744
2019-05-07 2019-03-31 13F CSX COM 126408103 17,560 0 0.00 1,314 20.44 0.0757
2019-02-13 2018-12-31 13F CSX COM 126408103 17,560 66 0.38 1,091 -15.82 0.0711
2018-11-07 2018-09-30 13F CSX COM 126408103 17,494 10 0.06 1,296 16.13 0.0719
2018-08-07 2018-06-30 13F CSX COM 126408103 17,484 0 0.00 1,116 14.58 0.0652
2018-05-07 2018-03-31 13F CSX COM 126408103 17,484 0 0.00 974 1.35 0.0554
2018-02-07 2017-12-31 13F CSX COM 126408103 17,484 0 0.00 961 1.37 0.0518
2017-11-13 2017-09-30 13F CSX COM 126408103 17,484 0 0.00 948 -0.63 0.0523
2017-08-10 2017-06-30 13F CSX COM 126408103 17,484 -500 -2.78 954 13.98 0.0541
2017-05-12 2017-03-31 13F CSX COM 126408103 17,984 -642 -3.45 837 25.11 0.0498
2017-02-10 2016-12-31 13F CSX COM 126408103 18,626 278 1.52 669 19.68 0.0418
2016-11-10 2016-09-30 13F CSX COM 126408103 18,348 1,102 6.39 559 24.22 0.0356
2016-08-11 2016-06-30 13F CSX COM 126408103 17,246 -204 -1.17 450 0.00 0.0289
2016-05-12 2016-03-31 13F CSX COM 126408103 17,450 4,342 33.12 450 32.35 0.0296
2016-02-12 2015-12-31 13F CSX COM 126408103 13,108 -210 -1.58 340 -5.29 0.0224
2015-11-10 2015-09-30 13F CSX COM 126408103 13,318 0 0.00 359 -17.47 0.0250
2015-08-11 2015-06-30 13F CSX COM 126408103 13,318 0 0.00 435 -1.36 0.0279
2015-05-12 2015-03-31 13F CSX COM 126408103 13,318 210 1.60 441 -7.16 0.0278
2015-02-12 2014-12-31 13F CSX COM 126408103 13,108 0 0.00 475 13.10 0.0300
2014-11-05 2014-09-30 13F CSX COM 126408103 13,108 0 0.00 420 3.96 0.0276
2014-08-13 2014-06-30 13F CSX COM 126408103 13,108 0 0.00 404 6.32 0.0263
2014-05-13 2014-03-31 13F CSX COM 126408103 13,108 -225 -1.69 380 -1.04 0.0262
2014-02-14 2013-12-31 13F CSX COM 126408103 13,333 -100 -0.74 384 10.98 0.0276
2013-11-14 2013-09-30 13F CSX COM 126408103 13,433 -1,000 -6.93 346 3.59 0.0275
2013-08-13 2013-06-30 13F CSX COM 126408103 14,433 14,433 334 0.0274
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.