Seaboard Corporation
US ˙ NYSEAM ˙ US8115431079

SecuritySEB / Seaboard Corporation
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership40 shares
Latest Disclosed Value $ 226,161
Mackenzie Financial Corp reports 73.33% decrease in ownership of SEB / Seaboard Corporation

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 40 shares of Seaboard Corporation (US:SEB) valued at $226,161 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 150 shares of Seaboard Corporation. This represents a change in shares of -73.33% during the quarter. The current value of the position is $210,324 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F SEABOARD CORP DEL COM 811543107 40 -110 -73.33 226 -66.22 0.0003
2026-02-18 2025-12-31 13F SEABOARD CORP DEL COM 811543107 150 0 0.00 669 22.30 0.0008
2025-11-13 2025-09-30 13F SEABOARD CORP DEL COM 811543107 150 -10 -6.25 547 19.69 0.0007
2025-08-13 2025-06-30 13F SEABOARD CORP DEL COM 811543107 160 10 6.67 458 13.12 0.0006
2025-05-07 2025-03-31 13F SEABOARD CORP DEL COM 811543107 150 50 50.00 405 66.94 0.0006
2025-05-02 2024-12-31 13F/A-2 SEABOARD CORP DEL COM 811543107 100 -10 -9.09 243 -29.86 0.0003
2025-02-20 2024-12-31 13F/A-1 SEABOARD CORP DEL COM 811543107 100 -10 243 0.0003
2024-11-13 2024-09-30 13F SEABOARD CORP DEL COM 811543107 110 -10 -8.33 345 -8.97 0.0005
2024-08-14 2024-06-30 13F SEABOARD CORP DEL COM 811543107 120 -80 -40.00 379 -41.15 0.0006
2024-05-10 2024-03-31 13F SEABOARD CORP DEL COM 811543107 200 200 645 0.0009
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.