GameStop Corp.
MX ˙ BMV ˙ US36467W1099
SecurityMX:GME / GameStop Corp.
InstitutionSei Investments Co
Latest Disclosed Ownership77,200 shares
Latest Disclosed Value $ 1,550,091
Sei Investments Co reports 89.04% increase in ownership of GME / GameStop Corp.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 77,200 shares of GameStop Corp. (MX:GME) valued at $1,550,091 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 40,838 shares of GameStop Corp.. This represents a change in shares of 89.04% 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)
2026-02-13 2025-12-31 13F GAMESTOP CORP CL A 36467W109 77,200 36,362 89.04 1,550 39.14 0.0015
2025-11-13 2025-09-30 13F GAMESTOP CORP CL A 36467W109 40,838 -3,640 -8.18 1,114 2.77 0.0012
2025-08-14 2025-06-30 13F GAMESTOP CORP CL A 36467W109 44,478 13,071 41.62 1,085 54.86 0.0013
2025-05-14 2025-03-31 13F/A-1 GAMESTOP CORP CL A 36467W109 31,407 7,953 33.91 701 -4.76 0.0009
2025-05-13 2025-03-31 13F GAMESTOP CORP CL A 36467W109 23,562 108 734 0.0008
2025-02-11 2024-12-31 13F GAMESTOP CORP CL A 36467W109 23,454 3,720 18.85 735 62.61 0.0009
2024-11-12 2024-09-30 13F GAMESTOP CORP CL A 36467W109 19,734 5,653 40.15 453 30.26 0.0006
2024-08-13 2024-06-30 13F GAMESTOP CORP CL A 36467W109 14,081 2,202 18.54 348 134.46 0.0005
2024-05-07 2024-03-31 13F GAMESTOP CORP CL A 36467W109 11,879 -638 -5.10 149 -32.42 0.0002
2024-02-14 2023-12-31 13F GAMESTOP CORP CL A 36467W109 12,517 1,490 13.51 219 20.99 0.0004
2023-11-14 2023-09-30 13F GAMESTOP CORP CL A 36467W109 11,027 2,454 28.62 182 -12.56 0.0003
2023-08-11 2023-06-30 13F GAMESTOP CORP CL A 36467W109 8,573 8,573 208 0.0004
2019-11-12 2019-09-30 13F GAMESTOP CORP CL A 36467W109 0 -38,025 -100.00 0 -100.00
2019-08-14 2019-06-30 13F GAMESTOP CORP CL A 36467W109 38,025 -2,593 -6.38 169 -51.85 0.0006
2019-05-15 2019-03-31 13F GAMESTOP CORP CL A 36467W109 40,618 8,651 27.06 351 12.14 0.0012
2019-02-13 2018-12-31 13F GAMESTOP CORP CL A 36467W109 31,967 23,715 287.38 313 565.96 0.0011
2018-11-08 2018-09-30 13F GAMESTOP CORP CL A 36467W109 8,252 -6,245 -43.08 47 -77.73 0.0002
2018-08-03 2018-06-30 13F GAMESTOP CORP CL A 36467W109 14,497 2,820 24.15 211 43.54 0.0007
2018-05-11 2018-03-31 13F GAMESTOP CORP CL A 36467W109 11,677 -914 -7.26 147 -34.96 0.0006
2018-02-08 2017-12-31 13F GAMESTOP CORP CL A 36467W109 12,591 679 5.70 226 -8.13 0.0008
2017-11-06 2017-09-30 13F GAMESTOP CORP CL A 36467W109 11,912 2,481 26.31 246 20.59 0.0009
2017-07-31 2017-06-30 13F GAMESTOP CORP CL A 36467W109 9,431 1,725 22.39 204 17.24 0.0008
2017-05-05 2017-03-31 13F GAMESTOP CORP CL A 36467W109 7,706 -198,773 -96.27 174 -96.66 0.0008
2017-02-02 2016-12-31 13F GAMESTOP CORP CL A 36467W109 206,479 5,338 2.65 5,216 -6.00 0.0253
2016-11-04 2016-09-30 13F GAMESTOP CORP CL A 36467W109 201,141 185,812 1,212.16 5,549 1,260.05 0.0282
2016-08-11 2016-06-30 13F GAMESTOP CORP CL A 36467W109 15,329 -19,655 -56.18 408 -63.24 0.0024
2016-05-10 2016-03-31 13F/A-1 GAMESTOP CORP CL A 36467W109 34,984 -8,727 -19.97 1,110 -9.39 0.0069
2016-02-03 2015-12-31 13F GAMESTOP CORP CL A 36467W109 43,711 36,665 520.37 1,225 320.96 0.0075
2015-11-02 2015-09-30 13F/A-1 GAMESTOP CORP CL A 36467W109 7,046 3,148 80.76 291 74.25 0.0027
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR CL A 36467W109 7,046 291
2015-08-07 2015-06-30 13F/A-1 GAMESTOP CORP CL A 36467W109 3,898 -212 -5.16 167 14.38 0.0015
2015-08-04 2015-06-30 13F GAMESTOP CORP CL A 36467W109 3,898 -212 167 0.0015
2015-05-14 2015-03-31 13F/A-1 GAMESTOP CORP CL A 36467W109 4,110 1,082 35.73 146 56.99 0.0013
2015-05-01 2015-03-31 13F GAMESTOP CORP CL A 36467W109 4,110 146
2015-02-10 2014-12-31 13F GAMESTOP CORP CL A 36467W109 3,028 3,028 93 0.0008
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.