Winmark Corporation
DE ˙ DB ˙ US9742501029
SecurityDE:GBZ / Winmark Corporation
InstitutionState Street Corp
Latest Disclosed Ownership123,645 shares
Latest Disclosed Value $ 52,864,420
State Street Corp reports 47.51% increase in ownership of GBZ / Winmark Corporation

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 123,645 shares of Winmark Corporation (DE:GBZ) valued at $52,864,420 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 83,822 shares of Winmark Corporation. This represents a change in shares of 47.51% during the quarter.

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 WINMARK COM 974250102 123,645 39,823 47.51 52,864 55.75 0.0018
2026-02-13 2025-12-31 13F WINMARK COM 974250102 83,822 8,372 11.10 33,943 -9.62 0.0011
2025-11-14 2025-09-30 13F WINMARK COM 974250102 75,450 6,510 9.44 37,557 44.27 0.0013
2025-08-14 2025-06-30 13F WINMARK COM 974250102 68,940 -8,192 -10.62 26,032 6.18 0.0010
2025-05-15 2025-03-31 13F WINMARK COM 974250102 77,132 -74 -0.10 24,518 -19.21 0.0010
2025-02-14 2024-12-31 13F WINMARK COM 974250102 77,206 -3,979 -4.90 30,347 -2.38 0.0012
2024-11-14 2024-09-30 13F WINMARK COM 974250102 81,185 1,535 1.93 31,088 10.69 0.0013
2024-08-14 2024-06-30 13F WINMARK COM 974250102 79,650 560 0.71 28,087 -1.82 0.0012
2024-05-15 2024-03-31 13F WINMARK COM 974250102 79,090 2,697 3.53 28,607 -10.32 0.0013
2024-02-14 2023-12-31 13F WINMARK COM 974250102 76,393 8,474 12.48 31,898 25.87 0.0016
2023-11-14 2023-09-30 13F WINMARK COM 974250102 67,919 -2,065 -2.95 25,343 8.92 0.0014
2023-08-14 2023-06-30 13F WINMARK COM 974250102 69,984 -8,229 -10.52 23,268 -7.16 0.0012
2023-05-15 2023-03-31 13F WINMARK COM 974250102 78,213 12,323 18.70 25,062 61.29 0.0014
2023-05-15 2022-12-31 13F/A-99 WINMARK COM 974250102 65,890 4,568 7.45 15,539 17.13 0.0009
2023-05-15 2022-12-31 13F WINMARK COM 974250102 65,890 4,568 15,539 0.0009
2022-11-15 2022-09-30 13F WINMARK COM 974250102 61,322 -3,376 -5.22 13,266 4.84 0.0008
2022-08-15 2022-06-30 13F WINMARK COM 974250102 64,698 -4,139 -6.01 12,653 -16.45 0.0008
2022-05-16 2022-03-31 13F WINMARK COM 974250102 68,837 -4,627 -6.30 15,144 -16.97 0.0007
2022-02-14 2021-12-31 13F WINMARK COM 974250102 73,464 624 0.86 18,240 16.45 0.0009
2021-11-15 2021-09-30 13F WINMARK COM 974250102 72,840 -301 -0.41 15,663 11.49 0.0008
2021-08-16 2021-06-30 13F WINMARK COM 974250102 73,141 4,730 6.91 14,049 10.15 0.0007
2021-07-09 2021-03-31 13F/A-1 WINMARK COM 974250102 68,411 -2,906 -4.07 12,754 -3.75 0.0007
2021-05-17 2021-03-31 13F WINMARK COM 974250102 68,411 -2,906 12,754 0.0007
2021-02-16 2020-12-31 13F WINMARK COM 974250102 71,317 13,050 22.40 13,251 32.09 0.0008
2020-11-10 2020-09-30 13F WINMARK COM 974250102 58,267 3,347 6.09 10,032 6.67 0.0007
2020-08-14 2020-06-30 13F WINMARK COM 974250102 54,920 -21 -0.04 9,405 34.34 0.0007
2020-06-19 2020-03-31 13F/A-1 WINMARK COM 974250102 54,941 3,959 7.77 7,001 -30.75 0.0006
2020-05-11 2020-03-31 13F WINMARK COM 974250102 54,941 3,959 7,001 614.8288
2020-02-06 2019-12-31 13F WINMARK COM 974250102 50,982 2,183 4.47 10,110 17.45 0.0007
2019-11-14 2019-09-30 13F WINMARK COM 974250102 48,799 479 0.99 8,608 2.88 0.0006
2019-08-14 2019-06-30 13F WINMARK COM 974250102 48,320 2,734 6.00 8,367 -2.68 0.0006
2019-05-15 2019-03-31 13F WINMARK COM 974250102 45,586 396 0.88 8,597 19.65 0.0007
2019-02-12 2018-12-31 13F WINMARK COM 974250102 45,190 1,685 3.87 7,185 -0.50 0.0007
2018-11-09 2018-09-30 13F WINMARK Common equity shares 974250102 43,505 1,486 3.54 7,221 15.74 0.0006
2018-08-14 2018-06-30 13F WINMARK Common equity shares 974250102 42,019 293 0.70 6,239 14.33 0.0005
2018-05-15 2018-03-31 13F WINMARK Common equity shares 974250102 41,726 -4,203 -9.15 5,457 -8.29 0.0005
2018-02-14 2017-12-31 13F WINMARK Common equity shares 974250102 45,929 425 0.93 5,950 -0.70 0.0005
2017-11-14 2017-09-30 13F WINMARK Common equity shares 974250102 45,504 580 1.29 5,992 3.40 0.0005
2017-08-14 2017-06-30 13F WINMARK Common equity shares 974250102 44,924 4,573 11.33 5,795 27.06 0.0005
2017-05-15 2017-03-31 13F WINMARK Common equity shares 974250102 40,351 845 2.14 4,561 -8.45 0.0004
2017-02-09 2016-12-31 13F WINMARK Common equity shares 974250102 39,506 1,625 4.29 4,982 24.61 0.0005
2017-01-13 2016-09-30 13F/A-1 WINMARK Common equity shares 974250102 37,881 371 0.99 3,998 6.93 0.0004
2016-11-14 2016-09-30 13F WINMARK Common equity shares 974250102 37,881 3,998
2016-08-12 2016-06-30 13F WINMARK Common equity shares 974250102 37,510 -1,504 -3.86 3,739 -2.30 0.0004
2016-05-20 2016-03-31 13F/A-1 WINMARK Common equity shares 974250102 39,014 166 0.43 3,827 5.95 0.0004
2016-05-12 2016-03-31 13F WINMARK Common equity shares 974250102 39,014 3,827
2016-02-16 2015-12-31 13F WINMARK Common equity shares 974250102 38,848 272 0.71 3,612 -9.02 0.0004
2015-11-16 2015-09-30 13F WINMARK Common equity shares 974250102 38,576 -841 -2.13 3,970 2.24 0.0005
2015-08-13 2015-06-30 13F WINMARK Common equity shares 974250102 39,417 149 0.38 3,883 12.85 0.0004
2015-05-15 2015-03-31 13F WINMARK Common equity shares 974250102 39,268 3,234 8.97 3,441 9.83 0.0004
2015-02-11 2014-12-31 13F WINMARK Common equity shares 974250102 36,034 2,675 8.02 3,133 27.93 0.0003
2014-11-12 2014-09-30 13F/A-1 WINMARK Common equity shares 974250102 33,359 600 1.83 2,449 7.32 0.0003
2014-11-10 2014-09-30 13F WINMARK Common equity shares 974250102 33,359 2,449
2014-08-12 2014-06-30 13F WINMARK Common equity shares 974250102 32,759 -450 -1.36 2,282 -9.23 0.0002
2014-05-15 2014-03-31 13F/A-1 WINMARK Common equity shares 974250102 33,209 1,694 5.38 2,514 -13.90 0.0003
2014-05-13 2014-03-31 13F WINMARK Common equity shares 974250102 33,409 2,529
2014-02-06 2013-12-31 13F/A-1 WINMARK Common equity shares 974250102 31,515 -244 -0.77 2,920 24.89 0.0003
2014-02-06 2013-12-31 13F WINMARK Common equity shares 974250102 32,805 1,873
2013-11-12 2013-09-30 13F WINMARK Common equity shares 974250102 31,759 -50 -0.16 2,338 13.61 0.0003
2013-08-08 2013-06-30 13F WINMARK Common equity shares 974250102 31,809 31,809 2,058 0.0003
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.