Seaboard Corporation
US ˙ NYSEAM ˙ US8115431079

SecuritySEB / Seaboard Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership4,627 shares
Latest Disclosed Value $ 26,161,436
Morgan Stanley reports 20.90% increase in ownership of SEB / Seaboard Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 4,627 shares of Seaboard Corporation (US:SEB) valued at $26,161,151 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 3,827 shares of Seaboard Corporation. This represents a change in shares of 20.90% during the quarter. The current value of the position is $24,329,229 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)
2026-05-15 2026-03-31 13F SEABOARD CORP DEL COM 811543107 4,627 800 20.90 26,161 53.77 0.0016
2026-05-27 2025-12-31 13F/A-1 SEABOARD CORP DEL COM 811543107 3,827 1,092 39.93 17,013 70.54 0.0010
2026-02-13 2025-12-31 13F SEABOARD CORP DEL COM 811543107 3,827 1,092 17,013 0.0010
2026-05-27 2025-09-30 13F/A-1 SEABOARD CORP DEL COM 811543107 2,735 -89 -3.15 9,977 23.43 0.0006
2025-11-14 2025-09-30 13F SEABOARD CORP DEL COM 811543107 2,735 -89 9,977 0.0006
2025-08-15 2025-06-30 13F SEABOARD CORP DEL COM 811543107 2,824 -247 -8.04 8,083 -2.43 0.0005
2025-05-15 2025-03-31 13F SEABOARD CORP DEL COM 811543107 3,071 -741 -19.44 8,284 -10.59 0.0006
2025-05-15 2024-12-31 13F/A-1 SEABOARD CORP DEL COM 811543107 3,812 334 9.60 9,264 -15.11 0.0006
2025-02-14 2024-12-31 13F SEABOARD CORP DEL COM 811543107 3,812 334 9,264 0.0006
2025-05-14 2024-09-30 13F/A-2 SEABOARD CORP DEL COM 811543107 3,478 -1,016 -22.61 10,914 -23.18 0.0008
2025-02-14 2024-09-30 13F/A-1 SEABOARD CORP DEL COM 811543107 3,478 -1,016 10,914 0.0008
2024-11-14 2024-09-30 13F SEABOARD CORP DEL COM 811543107 3,478 -1,016 10,914 0.0001
2025-05-14 2024-06-30 13F/A-2 SEABOARD CORP DEL COM 811543107 4,494 -442 -8.95 14,206 -10.73 0.0011
2024-10-17 2024-06-30 13F/A-1 SEABOARD CORP DEL COM 811543107 4,494 -442 14,206 0.0011
2024-08-14 2024-06-30 13F SEABOARD CORP DEL COM 811543107 4,494 -442 14,206 0.0011
2024-10-17 2024-03-31 13F/A-2 SEABOARD CORP DEL COM 811543107 4,936 983 24.87 15,913 12.76 0.0013
2024-08-16 2024-03-31 13F/A-1 SEABOARD CORP DEL COM 811543107 4,936 983 15,913 0.0013
2024-05-15 2024-03-31 13F SEABOARD CORP DEL COM 811543107 4,936 983 15,913 0.0013
2024-08-16 2023-12-31 13F/A-1 SEABOARD CORP DEL COM 811543107 3,953 712 21.97 14,113 16.02 0.0012
2024-02-13 2023-12-31 13F SEABOARD CORP DEL COM 811543107 3,953 712 14,113 0.0012
2023-11-15 2023-09-30 13F SEABOARD CORP DEL COM 811543107 3,241 419 14.85 12,164 21.05 0.0012
2023-08-14 2023-06-30 13F SEABOARD CORP DEL COM 811543107 2,822 167 6.29 10,048 0.39 0.0010
2023-05-15 2023-03-31 13F SEABOARD CORP DEL COM 811543107 2,655 81 3.15 10,009 3.01 0.0011
2023-02-14 2022-12-31 13F SEABOARD CORP DEL COM 811543107 2,574 351 15.79 9,717 28.46 0.0011
2022-11-14 2022-09-30 13F SEABOARD CORP DEL COM 811543107 2,223 25 1.14 7,564 -11.37 0.0010
2022-10-27 2022-06-30 13F/A-1 SEABOARD CORP DEL COM 811543107 2,198 515 30.60 8,534 20.59 0.0011
2022-08-15 2022-06-30 13F SEABOARD CORP DEL COM 811543107 2,198 515 8,534 0.0002
2022-10-27 2022-03-31 13F/A-1 SEABOARD CORP DEL COM 811543107 1,683 172 11.38 7,077 19.04 0.0010
2022-05-13 2022-03-31 13F SEABOARD CORP DEL COM 811543107 1,683 172 7,077 0.0010
2022-02-14 2021-12-31 13F SEABOARD CORP DEL COM 811543107 1,511 270 21.76 5,945 16.87 0.0007
2021-11-15 2021-09-30 13F SEABOARD CORP DEL COM 811543107 1,241 -48 -3.72 5,087 2.03 0.0007
2021-08-23 2021-06-30 13F/A-1 SEABOARD CORP DEL COM 811543107 1,289 449 53.45 4,986 60.84 0.0007
2021-08-16 2021-06-30 13F SEABOARD CORP DEL COM 811543107 1,289 449 4,986 0.0001
2021-05-17 2021-03-31 13F SEABOARD CORP DEL COM 811543107 840 43 5.40 3,100 28.36 0.0005
2021-02-16 2020-12-31 13F SEABOARD CORP DEL COM 811543107 797 -1,277 -61.57 2,415 -58.96 0.0004
2020-11-13 2020-09-30 13F SEABOARD COM 811543107 2,074 1,480 249.16 5,884 237.58 0.0011
2020-08-14 2020-06-30 13F SEABOARD COM 811543107 594 439 283.23 1,743 299.77 0.0004
2020-05-26 2020-03-31 13F/A-1 SEABOARD COM 811543107 155 93 150.00 436 65.15 0.0001
2020-05-15 2020-03-31 13F SEABOARD COM 811543107 155 93 436 33.4939
2020-02-14 2019-12-31 13F SEABOARD COM 811543107 62 -3 -4.62 264 -7.04 0.0001
2019-11-14 2019-09-30 13F SEABOARD COM 811543107 65 -39 -37.50 284 -33.80 0.0001
2019-08-14 2019-06-30 13F SEABOARD COM 811543107 104 -65 -38.46 429 -40.75 0.0001
2019-05-15 2019-03-31 13F SEABOARD COM 811543107 169 46 37.40 724 66.06 0.0002
2019-02-14 2018-12-31 13F SEABOARD COM 811543107 123 -148 -54.61 436 -56.66 0.0001
2019-04-23 2018-09-30 13F/A-2 SEABOARD COM 811543107 271 4 1.50 1,006 -5.00 0.0003
2018-11-20 2018-09-30 13F/A-1 SEABOARD COM 811543107 271 0 1,006 0.0003
2018-11-14 2018-09-30 13F SEABOARD COM 811543107 271 4 1,006
2019-04-23 2018-06-30 13F/A-1 SEABOARD COM 811543107 267 -668 -71.44 1,059 -73.45 0.0003
2018-08-14 2018-06-30 13F SEABOARD COM 811543107 267 -668 1,059
2019-04-23 2018-03-31 13F/A-1 SEABOARD COM 811543107 935 536 134.34 3,988 126.72 0.0011
2018-05-14 2018-03-31 13F SEABOARD COM 811543107 935 536 3,988
2019-04-23 2017-12-31 13F/A-1 SEABOARD COM 811543107 399 -13 -3.16 1,759 -5.23 0.0005
2018-02-14 2017-12-31 13F SEABOARD COM 811543107 399 -13 1,759
2017-11-14 2017-09-30 13F SEABOARD COM 811543107 412 -80 -16.26 1,856 -5.60 0.0006
2017-08-11 2017-06-30 13F SEABOARD COM 811543107 492 -74 -13.07 1,966 -16.66 0.0006
2017-05-22 2017-03-31 13F/A-1 SEABOARD COM 811543107 566 -512 -47.50 2,359 -44.64 0.0007
2017-05-12 2017-03-31 13F SEABOARD COM 811543107 566 2,359
2017-02-22 2016-12-31 13F/A-1 SEABOARD COM 811543107 1,078 763 242.22 4,261 293.08 0.0014
2017-02-13 2016-12-31 13F SEABOARD COM 811543107 1,078 4,261
2016-11-10 2016-09-30 13F SEABOARD COM 811543107 315 -136 -30.16 1,084 -16.29 0.0004
2016-08-12 2016-06-30 13F SEABOARD COM 811543107 451 -128 -22.11 1,295 -25.49 0.0005
2016-05-12 2016-03-31 13F SEABOARD COM 811543107 579 -78 -11.87 1,738 -8.62 0.0007
2016-02-09 2015-12-31 13F SEABOARD COM 811543107 657 -67 -9.25 1,902 -14.71 0.0007
2016-02-08 2015-09-30 13F/A-1 SEABOARD COM 811543107 724 -134 -15.62 2,230 -27.78 0.0008
2015-11-09 2015-09-30 13F SEABOARD COM 811543107 724 2,230
2015-08-12 2015-06-30 13F SEABOARD COM 811543107 858 -73 -7.84 3,088 -19.71 0.0011
2015-05-14 2015-03-31 13F SEABOARD COM 811543107 931 -115 -10.99 3,846 -12.39 0.0014
2015-02-13 2014-12-31 13F SEABOARD COM 811543107 1,046 313 42.70 4,390 123.87 0.0016
2014-12-16 2014-09-30 13F/A-1 SEABOARD COM 811543107 733 -183 -19.98 1,961 -18.33 0.0008
2014-11-14 2014-09-30 13F SEABOARD COM 811543107 733 1,961
2014-05-13 2014-03-31 13F SEABOARD COM 811543107 916 -26 -2.76 2,401 -8.78 0.0010
2014-02-13 2013-12-31 13F SEABOARD COM 811543107 942 13 1.40 2,632 3.13 0.0011
2013-11-13 2013-09-30 13F SEABOARD CORP (DEL.) COM ST COM 811543107 929 -228 -19.71 2,552 -18.54 0.0012
2013-08-08 2013-06-30 13F SEABOARD CORP (DEL.) COM ST COM 811543107 1,157 1,157 3,133 0.0016
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.