Winmark Corporation
US ˙ NasdaqGM ˙ US9742501029

SecurityWINA / Winmark Corporation
InstitutionCitigroup Inc
Latest Disclosed Ownership2,023 shares
Latest Disclosed Value $ 864,934
Citigroup Inc reports 65.68% increase in ownership of WINA / Winmark Corporation

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 2,023 shares of Winmark Corporation (US:WINA) valued at $864,934 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,221 shares of Winmark Corporation. This represents a change in shares of 65.68% during the quarter. The current value of the position is $760,041 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)
2026-05-11 2026-03-31 13F WINMARK COM 974250102 2,023 802 65.68 865 74.90 0.0002
2026-02-13 2025-12-31 13F WINMARK COM 974250102 1,221 -5,513 -81.87 494 -85.26 0.0002
2025-11-10 2025-09-30 13F WINMARK COM 974250102 6,734 -6,996 -50.95 3,352 -35.36 0.0015
2025-08-11 2025-06-30 13F WINMARK COM 974250102 13,730 10,917 388.09 5,185 479.87 0.0025
2025-05-12 2025-03-31 13F WINMARK COM 974250102 2,813 -936 -24.97 894 -39.31 0.0005
2025-02-12 2024-12-31 13F WINMARK COM 974250102 3,749 1,178 45.82 1,474 49.70 0.0009
2024-11-12 2024-09-30 13F WINMARK COM 974250102 2,571 1,229 91.58 985 108.03 0.0006
2024-08-12 2024-06-30 13F WINMARK COM 974250102 1,342 322 31.57 473 28.53 0.0003
2024-05-10 2024-03-31 13F WINMARK COM 974250102 1,020 204 25.00 369 8.24 0.0002
2024-02-09 2023-12-31 13F WINMARK COM 974250102 816 476 140.00 341 169.84 0.0002
2023-12-06 2023-09-30 13F/A-1 WINMARK COM 974250102 340 -1,664 -83.03 127 -81.08 0.0001
2023-11-09 2023-09-30 13F WINMARK COM 974250102 340 -1,664 127 0.0000
2023-08-10 2023-06-30 13F WINMARK COM 974250102 2,004 709 54.75 666 60.87 0.0004
2023-05-11 2023-03-31 13F WINMARK COM 974250102 1,295 119 10.12 415 49.46 0.0003
2023-02-09 2022-12-31 13F WINMARK COM 974250102 1,176 895 318.51 277 354.10 0.0002
2022-11-10 2022-09-30 13F WINMARK COM 974250102 281 -248 -46.88 61 -40.78 0.0000
2022-08-10 2022-06-30 13F WINMARK COM 974250102 529 210 65.83 103 45.07 0.0001
2022-05-12 2022-03-31 13F WINMARK COM 974250102 319 -862 -72.99 71 -75.77 0.0000
2022-02-10 2021-12-31 13F WINMARK COM 974250102 1,181 75 6.78 293 23.11 0.0002
2021-11-10 2021-09-30 13F WINMARK COM 974250102 1,106 198 21.81 238 36.78 0.0001
2021-08-10 2021-06-30 13F WINMARK COM 974250102 908 -3 -0.33 174 2.35 0.0001
2021-05-13 2021-03-31 13F WINMARK COM 974250102 911 -265 -22.53 170 -22.02 0.0001
2021-02-11 2020-12-31 13F WINMARK COM 974250102 1,176 835 244.87 218 269.49 0.0001
2020-11-12 2020-09-30 13F WINMARK COM 974250102 341 -572 -62.65 59 -62.18 0.0000
2020-08-12 2020-06-30 13F WINMARK COM 974250102 913 75 8.95 156 45.79 0.0001
2020-05-12 2020-03-31 13F WINMARK COM 974250102 838 328 64.31 107 5.94 0.0001
2020-02-12 2019-12-31 13F WINMARK COM 974250102 510 167 48.69 101 65.57 0.0001
2019-11-08 2019-09-30 13F WINMARK COM 974250102 343 -301 -46.74 61 -45.54 0.0000
2019-08-12 2019-06-30 13F WINMARK COM 974250102 644 63 10.84 112 2.75 0.0001
2019-05-13 2019-03-31 13F WINMARK COM 974250102 581 -45 -7.19 109 9.00 0.0001
2019-02-12 2018-12-31 13F WINMARK COM 974250102 626 15 2.45 100 -0.99 0.0001
2018-11-13 2018-09-30 13F WINMARK COM 974250102 611 314 105.72 101 129.55 0.0001
2018-08-10 2018-06-30 13F WINMARK COM 974250102 297 -758 -71.85 44 -68.12 0.0000
2018-05-11 2018-03-31 13F WINMARK COM 974250102 1,055 854 424.88 138 430.77 0.0001
2018-02-12 2017-12-31 13F WINMARK COM 974250102 201 201 26 0.0000
2017-11-13 2017-09-30 13F WINMARK COM 974250102 0 -16 -100.00 0 -100.00
2017-08-11 2017-06-30 13F WINMARK COM 974250102 16 -30 -65.22 2 -60.00 0.0000
2017-05-12 2017-03-31 13F WINMARK COM 974250102 46 -2,235 -97.98 5 -98.26 0.0000
2017-02-10 2016-12-31 13F WINMARK COM 974250102 2,281 2,081 1,040.50 288 1,271.43 0.0003
2016-11-10 2016-09-30 13F WINMARK COM 974250102 200 -63 -23.95 21 -19.23 0.0000
2016-08-12 2016-06-30 13F WINMARK COM 974250102 263 -1,375 -83.94 26 -83.75 0.0000
2016-05-13 2016-03-31 13F WINMARK COM 974250102 1,638 952 138.78 160 153.97 0.0002
2016-02-12 2015-12-31 13F WINMARK COM 974250102 686 685 68,500.00 63 0.0001
2015-11-13 2015-09-30 13F WINMARK COM 974250102 1 -28 -96.55 0 -100.00
2015-08-13 2015-06-30 13F WINMARK COM 974250102 29 -125 -81.17 3 -76.92 0.0000
2015-05-14 2015-03-31 13F WINMARK COM 974250102 154 -4,030 -96.32 13 -96.43 0.0000
2015-02-17 2014-12-31 13F WINMARK COM 974250102 4,184 1,206 40.50 364 66.21 0.0003
2014-11-14 2014-09-30 13F WINMARK COM 974250102 2,978 143 5.04 219 10.61 0.0002
2014-08-14 2014-06-30 13F WINMARK COM 974250102 2,835 2,040 256.60 198 230.00 0.0002
2014-05-15 2014-03-31 13F WINMARK COM 974250102 795 86 12.13 60 -7.69 0.0001
2014-02-14 2013-12-31 13F WINMARK COM 974250102 709 685 2,854.17 65 6,400.00 0.0001
2013-11-14 2013-09-30 13F WINMARK COM 974250102 24 8 50.00 1 0.00 0.0000
2013-08-14 2013-06-30 13F WINMARK COM 974250102 16 16 1 0.0000
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.