Seaboard Corporation
US ˙ NYSEAM ˙ US8115431079

SecuritySEB / Seaboard Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership47,087 shares
Latest Disclosed Value $ 266,221,577
Dimensional Fund Advisors Lp reports 4.48% increase in ownership of SEB / Seaboard Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 47,087 shares of Seaboard Corporation (US:SEB) valued at $266,230,840 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 45,070 shares of Seaboard Corporation. This represents a change in shares of 4.48% during the quarter. The current value of the position is $247,588,155 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)
2026-05-07 2026-03-31 13F SEABOARD CORP DEL COM 811543107 47,087 2,017 4.48 266,222 32.89 0.0119
2026-02-12 2025-12-31 13F SEABOARD CORP DEL COM 811543107 45,070 -63 -0.14 200,330 21.71 0.0420
2025-11-12 2025-09-30 13F SEABOARD CORP DEL COM 811543107 45,133 -749 -1.63 164,602 25.39 0.0353
2025-08-12 2025-06-30 13F SEABOARD CORP DEL COM 811543107 45,882 303 0.66 131,277 6.79 0.0304
2025-05-13 2025-03-31 13F SEABOARD CORP DEL COM 811543107 45,579 -309 -0.67 122,933 10.26 0.0306
2025-02-13 2024-12-31 13F SEABOARD CORP DEL COM 811543107 45,888 -277 -0.60 111,490 -23.01 0.0268
2024-11-07 2024-09-30 13F SEABOARD CORP DEL COM 811543107 46,165 176 0.38 144,821 -0.37 0.0351
2024-08-09 2024-06-30 13F SEABOARD CORP DEL COM 811543107 45,989 1,081 2.41 145,358 0.40 0.0380
2024-05-10 2024-03-31 13F SEABOARD CORP DEL COM 811543107 44,908 2,328 5.47 144,780 -4.76 0.0392
2024-02-07 2023-12-31 13F SEABOARD CORP DEL COM 811543107 42,580 2,342 5.82 152,015 0.66 0.0444
2023-11-09 2023-09-30 13F SEABOARD CORP DEL COM 811543107 40,238 1,466 3.78 151,014 9.39 0.0495
2023-08-09 2023-06-30 13F SEABOARD CORP DEL COM 811543107 38,772 575 1.51 138,055 -4.13 0.0440
2023-05-12 2023-03-31 13F SEABOARD CORP DEL COM 811543107 38,197 339 0.90 144,006 101,312.68 0.0485
2023-02-09 2022-12-31 13F SEABOARD CORP DEL COM 811543107 37,858 473 1.27 143 -99.89 0.0422
2022-11-10 2022-09-30 13F SEABOARD CORP DEL COM 811543107 37,385 545 1.48 127,212 -11.06 0.0488
2022-08-12 2022-06-30 13F SEABOARD CORP DEL COM 811543107 36,840 296 0.81 143,032 -6.93 0.0513
2022-05-13 2022-03-31 13F SEABOARD CORP DEL COM 811543107 36,544 590 1.64 153,682 8.62 0.0473
2022-02-09 2021-12-31 13F SEABOARD CORP DEL COM 811543107 35,954 -308 -0.85 141,480 -4.84 0.0428
2021-11-12 2021-09-30 13F SEABOARD CORP DEL COM 811543107 36,262 163 0.45 148,675 6.46 0.0479
2021-08-12 2021-06-30 13F SEABOARD CORP DEL COM 811543107 36,099 -306 -0.84 139,658 3.97 0.0442
2021-05-14 2021-03-31 13F SEABOARD CORP DEL COM 811543107 36,405 -28 -0.08 134,331 21.64 0.0444
2021-03-08 2020-12-31 13F/A-2 SEABOARD CORP DEL COM 811543107 36,433 142 0.39 110,431 7.27 0.0399
2021-02-11 2020-12-31 13F SEABOARD CORP DEL COM 811543107 36,433 142 110,431 39,881.8075
2020-11-12 2020-09-30 13F SEABOARD COM 811543107 36,291 199 0.55 102,945 -2.78 0.0437
2020-08-13 2020-06-30 13F SEABOARD COM 811543107 36,092 257 0.72 105,890 5.05 0.0465
2020-05-14 2020-03-31 13F SEABOARD COM 811543107 35,835 347 0.98 100,798 -33.18 0.0525
2020-02-14 2019-12-31 13F SEABOARD COM 811543107 35,488 -890 -2.45 150,842 -5.22 0.0550
2019-11-12 2019-09-30 13F SEABOARD COM 811543107 36,378 -870 -2.34 159,152 3.29 0.0618
2019-08-13 2019-06-30 13F SEABOARD COM 811543107 37,248 -1,210 -3.15 154,081 -6.49 0.0598
2019-08-12 2019-03-31 13F/A-2 SEABOARD COM 811543107 38,458 -396 -1.02 164,777 19.87 0.0656
2019-05-10 2019-03-31 13F SEABOARD COM 811543107 38,458 -396 164,777
2019-02-26 2018-12-31 13F/A-1 SEABOARD COM 811543107 38,854 -190 -0.49 137,467 -5.10 0.0623
2019-02-13 2018-12-31 13F SEABOARD COM 811543107 38,854 -190 137,467
2018-11-13 2018-09-30 13F SEABOARD COM 811543107 39,044 -294 -0.75 144,855 -7.08 0.0551
2018-08-10 2018-06-30 13F SEABOARD COM 811543107 39,338 -584 -1.46 155,888 -8.44 0.0621
2018-05-11 2018-03-31 13F SEABOARD COM 811543107 39,922 -317 -0.79 170,267 -4.05 0.0710
2018-02-12 2017-12-31 13F SEABOARD COM 811543107 40,239 -406 -1.00 177,450 -3.09 0.0736
2017-11-13 2017-09-30 13F SEABOARD COM 811543107 40,645 -1,227 -2.93 183,105 9.46 0.0800
2017-08-11 2017-06-30 13F SEABOARD COM 811543107 41,872 -450 -1.06 167,275 -5.20 0.0772
2017-05-12 2017-03-31 13F SEABOARD COM 811543107 42,322 -773 -1.79 176,455 3.61 0.0843
2017-02-09 2016-12-31 13F SEABOARD COM 811543107 43,095 -483 -1.11 170,314 13.61 0.0851
2016-11-10 2016-09-30 13F SEABOARD COM 811543107 43,578 -858 -1.93 149,905 17.52 0.0810
2016-08-09 2016-06-30 13F SEABOARD COM 811543107 44,436 -416 -0.93 127,557 -5.30 0.0734
2016-05-13 2016-03-31 13F SEABOARD COM 811543107 44,852 -212 -0.47 134,690 3.25 0.0806
2016-02-10 2015-12-31 13F SEABOARD COM 811543107 45,064 9 0.02 130,448 -5.96 0.0813
2015-11-13 2015-09-30 13F SEABOARD COM 811543107 45,055 -210 -0.46 138,719 -14.84 0.0911
2015-08-14 2015-06-30 13F SEABOARD COM 811543107 45,265 -122 -0.27 162,894 -13.14 0.0997
2015-05-14 2015-03-31 13F SEABOARD COM 811543107 45,387 -816 -1.77 187,545 -3.30 0.1184
2015-02-06 2014-12-31 13F SEABOARD COM 811543107 46,203 174 0.38 193,948 57.51 0.1274
2014-11-13 2014-09-30 13F SEABOARD COM 811543107 46,029 -9 -0.02 123,133 -11.45 0.0872
2014-08-08 2014-06-30 13F SEABOARD COM 811543107 46,038 -101 -0.22 139,054 14.97 0.0967
2014-05-14 2014-03-31 13F SEABOARD COM 811543107 46,139 18 0.04 120,945 -6.17 0.0904
2014-02-12 2013-12-31 13F SEABOARD COM 811543107 46,121 -98 -0.21 128,902 1.49 0.1004
2013-11-13 2013-09-30 13F SEABOARD COM 811543107 46,219 8 0.02 127,014 1.50 0.1099
2013-08-15 2013-06-30 13F SEABOARD COM 811543107 46,211 46,211 125,138 0.1178
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.