Winmark Corporation
DE ˙ DB ˙ US9742501029
SecurityDE:GBZ / Winmark Corporation
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership220,496 shares
Ownership 6.21%
Renaissance Technologies Llc ownership in GBZ / Winmark Corporation

2025-08-13 - Renaissance Technologies Llc has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 220,496 shares of Winmark Corporation (DE:GBZ). This represents 6.21 percent ownership of the company. In their previous filing dated 2025-02-13 , Renaissance Technologies Llc had reported owning 174,231 shares, indicating an increase of 26.55 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-08-13 2025-08-13 13G 174,231 220,496 26.55 6.21 25.45
2025-02-13 2025-02-13 13G/A 177,231 174,231 -1.69 4.95 -2.56
2024-02-13 2024-02-13 13G 180,528 177,231 -1.83 5.08 5.18
2021-02-11 2021-02-11 13G/A 201,797 180,528 -10.54 4.83 -8.35
2020-02-12 2020-02-12 13G 201,797 5.27

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-14 2026-03-31 13F WINMARK COM 974250102 205,875 -2,280 -1.10 88,022 4.43 0.1377
2026-02-12 2025-12-31 13F WINMARK COM 974250102 208,155 -6,740 -3.14 84,290 -21.20 0.1308
2025-11-13 2025-09-30 13F WINMARK COM 974250102 214,895 -5,601 -2.54 106,968 28.47 0.1412
2025-08-13 2025-06-30 13F WINMARK COM 974250102 220,496 44,965 25.62 83,261 49.22 0.1108
2025-05-14 2025-03-31 13F WINMARK COM 974250102 175,531 1,300 0.75 55,796 -18.53 0.0844
2025-02-13 2024-12-31 13F WINMARK COM 974250102 174,231 -9,900 -5.38 68,485 -2.87 0.1014
2024-11-13 2024-09-30 13F WINMARK COM 974250102 184,131 4,054 2.25 70,509 11.04 0.1060
2024-08-09 2024-06-30 13F WINMARK COM 974250102 180,077 -4,122 -2.24 63,501 96,112.12 0.1077
2024-05-13 2024-03-31 13F WINMARK COM 974250102 184,199 6,968 3.93 67 -10.81 0.1047
2024-02-13 2023-12-31 13F WINMARK COM 974250102 177,231 9,200 5.48 74 19.35 0.1145
2023-11-14 2023-09-30 13F WINMARK COM 974250102 168,031 5,975 3.69 63 16.98 0.1069
2023-08-11 2023-06-30 13F WINMARK COM 974250102 162,056 16,125 11.05 54 15.22 0.0777
2023-05-12 2023-03-31 13F WINMARK COM 974250102 145,931 5,700 4.06 47 39.39 0.0621
2023-02-13 2022-12-31 13F WINMARK COM 974250102 140,231 -5,000 -3.44 33 -99.89 0.0452
2022-11-14 2022-09-30 13F WINMARK COM 974250102 145,231 -26,275 -15.32 31,419 -6.33 0.0444
2022-08-12 2022-06-30 13F WINMARK COM 974250102 171,506 11,275 7.04 33,541 -4.85 0.0397
2022-05-13 2022-03-31 13F WINMARK COM 974250102 160,231 -2,621 -1.61 35,251 -12.82 0.0414
2022-02-11 2021-12-31 13F WINMARK COM 974250102 162,852 -4,979 -2.97 40,435 12.04 0.0503
2021-11-12 2021-09-30 13F WINMARK COM 974250102 167,831 -1,707 -1.01 36,089 10.82 0.0466
2021-08-13 2021-06-30 13F WINMARK COM 974250102 169,538 -5,395 -3.08 32,565 -0.15 0.0407
2021-05-13 2021-03-31 13F WINMARK COM 974250102 174,933 -5,595 -3.10 32,613 -2.77 0.0406
2021-02-10 2020-12-31 13F WINMARK COM 974250102 180,528 -10,422 -5.46 33,542 2.02 0.0364
2020-11-13 2020-09-30 13F WINMARK COM 974250102 190,950 -5,700 -2.90 32,878 -2.36 0.0328
2020-08-13 2020-06-30 13F WINMARK COM 974250102 196,650 -11,600 -5.57 33,674 26.90 0.0291
2020-05-14 2020-03-31 13F WINMARK COM 974250102 208,250 6,453 3.20 26,535 -33.69 0.0258
2020-02-13 2019-12-31 13F WINMARK COM 974250102 201,797 13,797 7.34 40,016 20.67 0.0308
2019-11-13 2019-09-30 13F WINMARK COM 974250102 188,000 -1,000 -0.53 33,161 1.33 0.0281
2019-08-12 2019-06-30 13F WINMARK COM 974250102 189,000 -832 -0.44 32,725 -8.59 0.0288
2019-05-14 2019-03-31 13F WINMARK COM 974250102 189,832 -193 -0.10 35,800 18.49 0.0325
2019-02-12 2018-12-31 13F WINMARK COM 974250102 190,025 -275 -0.14 30,214 -4.36 0.0331
2018-11-13 2018-09-30 13F WINMARK COM 974250102 190,300 5,100 2.75 31,590 14.90 0.0325
2018-08-13 2018-06-30 13F/A-1 WINMARK COM 974250102 185,200 5,400 3.00 27,493 16.90 0.0300
2018-08-13 2018-06-30 13F WINMARK COM 974250102 179,800 23,518
2018-05-14 2018-03-31 13F WINMARK COM 974250102 179,800 1,100 0.62 23,518 1.70 0.0257
2018-02-13 2017-12-31 13F WINMARK COM 974250102 178,700 8,400 4.93 23,124 3.06 0.0255
2017-11-13 2017-09-30 13F WINMARK COM 974250102 170,300 20,199 13.46 22,437 15.92 0.0264
2017-08-11 2017-06-30 13F WINMARK COM 974250102 150,101 15,801 11.77 19,356 27.54 0.0247
2017-05-12 2017-03-31 13F WINMARK COM 974250102 134,300 4,200 3.23 15,176 -7.53 0.0212
2017-02-13 2016-12-31 13F WINMARK COM 974250102 130,100 1,300 1.01 16,412 20.76 0.0260
2016-11-14 2016-09-30 13F WINMARK COM 974250102 128,800 1,400 1.10 13,591 7.03 0.0240
2016-08-12 2016-06-30 13F WINMARK COM 974250102 127,400 200 0.16 12,698 1.89 0.0242
2016-05-13 2016-03-31 13F WINMARK COM 974250102 127,200 1,500 1.19 12,463 6.60 0.0237
2016-02-11 2015-12-31 13F WINMARK COM 974250102 125,700 300 0.24 11,691 -9.41 0.0255
2015-11-12 2015-09-30 13F WINMARK COM 974250102 125,400 6,500 5.47 12,906 10.19 0.0308
2015-08-14 2015-06-30 13F WINMARK COM 974250102 118,900 2,500 2.15 11,712 14.90 0.0267
2015-05-13 2015-03-31 13F WINMARK COM 974250102 116,400 2,900 2.56 10,193 3.32 0.0217
2015-02-13 2014-12-31 13F WINMARK COM 974250102 113,500 800 0.71 9,865 19.10 0.0238
2014-11-12 2014-09-30 13F WINMARK COM 974250102 112,700 -478 -0.42 8,283 5.10 0.0227
2014-08-13 2014-06-30 13F WINMARK COM 974250102 113,178 14,778 15.02 7,881 5.86 0.0184
2014-05-14 2014-03-31 13F WINMARK COM 974250102 98,400 6,400 6.96 7,445 -12.63 0.0179
2014-02-14 2013-12-31 13F WINMARK COM 974250102 92,000 8,100 9.65 8,521 37.79 0.0204
2013-11-13 2013-09-30 13F WINMARK COM 974250102 83,900 14,100 20.20 6,184 36.57 0.0150
2013-08-12 2013-06-30 13F WINMARK COM 974250102 69,800 69,800 4,528 0.0119
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.