Seaboard Corporation
US ˙ NYSEAM ˙ US8115431079

SecuritySEB / Seaboard Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership128 shares
Latest Disclosed Value $ 724,834
Janus Henderson Group Plc ownership in SEB / Seaboard Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 128 shares of Seaboard Corporation (US:SEB) valued at $723,715 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 128 shares of Seaboard Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $673,037 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)
2026-05-18 2026-03-31 13F/A-1 SEABOARD CORP DEL COM 811543107 128 0 0.00 725 27.46 0.0001
2026-05-15 2026-03-31 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 725 27.46 0.0001
2026-02-17 2025-12-31 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 568 21.37 0.0003
2025-11-14 2025-09-30 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 469 27.52 0.0002
2025-08-14 2025-06-30 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 367 6.38 0.0002
2025-05-15 2025-03-31 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 346 11.29 0.0002
2025-02-14 2024-12-31 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 311 -22.69 0.0002
2024-11-14 2024-09-30 13F SEABOARD CORP DEL COM 811543107 128 0 0.00 402 0.00 0.0002
2024-08-14 2024-06-30 13F SEABOARD CORP DEL COM 811543107 128 -1 -0.78 401 -3.14 0.0002
2024-05-15 2024-03-31 13F SEABOARD CORP DEL COM 811543107 129 0 0.00 415 -10.20 0.0002
2024-02-14 2023-12-31 13F SEABOARD CORP DEL COM 811543107 129 0 0.00 462 -4.36 0.0003
2023-11-14 2023-09-30 13F SEABOARD CORP DEL COM 811543107 129 0 0.00 482 5.47 0.0003
2023-08-14 2023-06-30 13F SEABOARD CORP DEL COM 811543107 129 -1 -0.77 458 -7.11 0.0003
2023-05-15 2023-03-31 13F SEABOARD CORP DEL COM 811543107 130 70 116.67 493 118.67 0.0003
2023-02-14 2022-12-31 13F SEABOARD CORP DEL COM 811543107 60 1 1.69 226 11.94 0.0002
2022-11-14 2022-09-30 13F SEABOARD CORP DEL COM 811543107 59 -5 -7.81 201 -19.28 0.0002
2022-08-15 2022-06-30 13F SEABOARD CORP DEL COM 811543107 64 4 6.67 249 -1.58 0.0002
2022-05-16 2022-03-31 13F SEABOARD CORP DEL COM 811543107 60 0 0.00 253 6.30 0.0001
2022-02-14 2021-12-31 13F SEABOARD CORP DEL COM 811543107 60 60 238 0.0001
2020-11-16 2020-09-30 13F SEABOARD COM 811543107 0 -6,207 -100.00 0 -100.00
2020-08-14 2020-06-30 13F SEABOARD COM 811543107 6,207 -3,073 -33.11 18,210 -30.24 0.0102
2020-05-14 2020-03-31 13F SEABOARD COM 811543107 9,280 -2,210 -19.23 26,103 -46.55 0.0180
2020-02-18 2019-12-31 13F SEABOARD COM 811543107 11,490 1,627 16.50 48,839 13.18 0.0250
2019-11-14 2019-09-30 13F SEABOARD COM 811543107 9,863 1,830 22.78 43,151 29.86 0.0234
2019-07-31 2019-06-30 13F SEABOARD COM 811543107 8,033 -2,098 -20.71 33,230 -23.45 0.0181
2019-04-30 2019-03-31 13F SEABOARD COM 811543107 10,131 -2,778 -21.52 43,408 -4.96 0.0241
2019-02-06 2018-12-31 13F SEABOARD COM 811543107 12,909 825 6.83 45,672 1.87 0.0291
2018-11-09 2018-09-30 13F SEABOARD COM 811543107 12,084 3,857 46.88 44,832 37.52 0.0240
2018-08-10 2018-06-30 13F SEABOARD COM 811543107 8,227 539 7.01 32,601 -0.57 0.0186
2018-05-14 2018-03-31 13F SEABOARD COM 811543107 7,688 994 14.85 32,789 11.07 0.0193
2018-03-12 2017-12-31 13F/A-1 SEABOARD COM 811543107 6,694 1,570 30.64 29,521 27.89 0.0182
2018-02-09 2017-12-31 13F SEABOARD COM 811543107 6,694 1,570 29,521
2017-11-14 2017-09-30 13F SEABOARD COM 811543107 5,124 5,124 23,084 0.0148
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.