Winmark Corporation
DE ˙ DB ˙ US9742501029
SecurityDE:GBZ / Winmark Corporation
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership4,719 shares
Latest Disclosed Value $ 2,017,608
Millennium Management Llc reports 390.54% increase in ownership of GBZ / Winmark Corporation

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 4,719 shares of Winmark Corporation (DE:GBZ) valued at $2,017,608 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 962 shares of Winmark Corporation. This represents a change in shares of 390.54% 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.

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)
2026-05-15 2026-03-31 13F WINMARK COM 974250102 4,719 3,757 390.54 2,018 418.51 0.0008
2026-02-17 2025-12-31 13F WINMARK COM 974250102 962 -14,587 -93.81 390 -94.97 0.0002
2025-11-14 2025-09-30 13F WINMARK COM 974250102 15,549 9,545 158.98 7,740 241.38 0.0033
2025-08-14 2025-06-30 13F WINMARK COM 974250102 6,004 -2,264 -27.38 2,267 -13.74 0.0011
2025-05-15 2025-03-31 13F WINMARK COM 974250102 8,268 6,746 443.23 2,628 339.46 0.0014
2025-02-14 2024-12-31 13F WINMARK COM 974250102 1,522 -2,830 -65.03 598 -64.11 0.0003
2024-11-14 2024-09-30 13F WINMARK COM 974250102 4,352 -9,634 -68.88 1,667 -66.21 0.0008
2024-08-14 2024-06-30 13F WINMARK COM 974250102 13,986 -10,830 -43.64 4,932 -45.06 0.0023
2024-05-15 2024-03-31 13F WINMARK COM 974250102 24,816 17,763 251.85 8,976 204.86 0.0038
2024-02-14 2023-12-31 13F WINMARK COM 974250102 7,053 7,053 2,945 0.0013
2023-11-14 2023-09-30 13F WINMARK COM 974250102 0 -8,301 -100.00 0 -100.00
2023-08-14 2023-06-30 13F WINMARK COM 974250102 8,301 7,606 1,094.39 2,760 1,137.22 0.0014
2023-05-15 2023-03-31 13F WINMARK COM 974250102 695 -12,702 -94.81 223 -92.94 0.0001
2023-02-14 2022-12-31 13F WINMARK COM 974250102 13,397 6,358 90.33 3,159 107.42 0.0017
2022-11-14 2022-09-30 13F WINMARK COM 974250102 7,039 178 2.59 1,523 13.49 0.0009
2022-08-15 2022-06-30 13F WINMARK COM 974250102 6,861 6,861 1,342 0.0008
2021-11-15 2021-09-30 13F WINMARK COM 974250102 0 -1,477 -100.00 0 -100.00
2021-08-16 2021-06-30 13F WINMARK COM 974250102 1,477 1,477 284 0.0002
2020-11-16 2020-09-30 13F WINMARK COM 974250102 0 -1,319 -100.00 0 -100.00
2020-08-14 2020-06-30 13F WINMARK COM 974250102 1,319 -12,651 -90.56 226 -87.30 0.0003
2020-05-14 2020-03-31 13F WINMARK COM 974250102 13,970 -6,858 -32.93 1,780 -56.90 0.0040
2020-02-14 2019-12-31 13F WINMARK COM 974250102 20,828 17,859 601.52 4,130 689.67 0.0052
2019-11-14 2019-09-30 13F WINMARK COM 974250102 2,969 2,969 -85.75 523 -87.34 0.0008
2019-08-15 2019-06-30 13F/A-1 WINMARK COM 974250102 0 -3,022 -100.00 0 -100.00
2019-05-14 2019-03-31 13F WINMARK COM 974250102 3,022 -391 -11.46 570 4.97 0.0009
2019-02-15 2018-12-31 13F/A-1 WINMARK COM 974250102 3,413 108 3.27 543 -1.09 0.0008
2019-02-14 2018-12-31 13F WINMARK COM 974250102 3,413 543
2018-11-14 2018-09-30 13F WINMARK COM 974250102 3,305 -82 -2.42 549 9.15 0.0007
2018-08-14 2018-06-30 13F WINMARK COM 974250102 3,387 1,313 63.31 503 85.61 0.0007
2018-05-15 2018-03-31 13F WINMARK COM 974250102 2,074 -2,721 -56.75 271 -56.29 0.0004
2018-02-14 2017-12-31 13F WINMARK COM 974250102 4,795 4,795 620 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.