Extreme Networks, Inc.
US ˙ NasdaqGS ˙ US30226D1063

SecurityEXTR / Extreme Networks, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership239,331 shares
Latest Disclosed Value $ 3,984,906
Sei Investments Co reports 73.21% increase in ownership of EXTR / Extreme Networks, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 239,331 shares of Extreme Networks, Inc. (US:EXTR) valued at $3,984,861 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 138,174 shares of Extreme Networks, Inc.. This represents a change in shares of 73.21% during the quarter. The current value of the position is $6,890,339 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)
2026-02-13 2025-12-31 13F EXTREME NETWORKS COM 30226D106 239,331 101,157 73.21 3,985 39.64 0.0039
2025-11-13 2025-09-30 13F EXTREME NETWORKS COM 30226D106 138,174 45,299 48.77 2,853 71.15 0.0031
2025-08-14 2025-06-30 13F EXTREME NETWORKS COM 30226D106 92,875 30,174 48.12 1,667 101.09 0.0019
2025-05-14 2025-03-31 13F/A-1 EXTREME NETWORKS COM 30226D106 62,701 25,331 67.78 830 32.64 0.0011
2025-05-13 2025-03-31 13F EXTREME NETWORKS COM 30226D106 38,437 1,067 619 0.0007
2025-02-11 2024-12-31 13F EXTREME NETWORKS COM 30226D106 37,370 24,370 187.46 626 220.51 0.0008
2024-11-12 2024-09-30 13F EXTREME NETWORKS COM 30226D106 13,000 753 6.15 195 18.90 0.0003
2024-08-13 2024-06-30 13F EXTREME NETWORKS COM 30226D106 12,247 122 1.01 165 17.99 0.0002
2024-05-07 2024-03-31 13F EXTREME NETWORKS COM 30226D106 12,125 -29,484 -70.86 140 -81.04 0.0002
2024-02-14 2023-12-31 13F EXTREME NETWORKS COM 30226D106 41,609 -195,039 -82.42 734 -87.21 0.0012
2023-11-14 2023-09-30 13F EXTREME NETWORKS COM 30226D106 236,648 -118,269 -33.32 5,729 -38.03 0.0103
2023-08-11 2023-06-30 13F EXTREME NETWORKS COM 30226D106 354,917 117,049 49.21 9,245 103.32 0.0161
2023-05-12 2023-03-31 13F EXTREME NETWORKS COM 30226D106 237,868 -12,713 -5.07 4,548 -0.89 0.0084
2023-02-10 2022-12-31 13F EXTREME NETWORKS COM 30226D106 250,581 89,999 56.05 4,588 118.58 0.0102
2022-11-14 2022-09-30 13F EXTREME NETWORKS COM 30226D106 160,582 105,460 191.32 2,099 335.48 0.0047
2022-08-15 2022-06-30 13F EXTREME NETWORKS COM 30226D106 55,122 -123,730 -69.18 482 -77.93 0.0010
2022-05-13 2022-03-31 13F EXTREME NETWORKS COM 30226D106 178,852 -33,162 -15.64 2,184 -34.39 0.0044
2022-02-14 2021-12-31 13F EXTREME NETWORKS COM 30226D106 212,014 50,116 30.96 3,329 108.71 0.0062
2021-11-12 2021-09-30 13F EXTREME NETWORKS COM 30226D106 161,898 113,155 232.15 1,595 193.20 0.0033
2021-08-06 2021-06-30 13F EXTREME NETWORKS COM 30226D106 48,743 26,570 119.83 544 233.74 0.0012
2020-08-11 2020-06-30 13F EXTREME NETWORKS COM 30226D106 22,173 22,173 163 0.0005
2020-05-14 2020-03-31 13F EXTREME NETWORKS COM 30226D106 0 -22,173 -100.00 0 -100.00
2020-02-06 2019-12-31 13F EXTREME NETWORKS COM 30226D106 22,173 4,459 25.17 163 26.36 0.0005
2019-11-12 2019-09-30 13F EXTREME NETWORKS COM 30226D106 17,714 4,097 30.09 129 46.59 0.0003
2019-08-14 2019-06-30 13F EXTREME NETWORKS COM 30226D106 13,617 -33,200 -70.91 88 -74.93 0.0003
2019-05-15 2019-03-31 13F EXTREME NETWORKS COM 30226D106 46,817 38,845 487.27 351 697.73 0.0012
2019-02-13 2018-12-31 13F EXTREME NETWORKS COM 30226D106 7,972 0 0.00 44 0.00 0.0002
2018-11-08 2018-09-30 13F EXTREME NETWORKS COM 30226D106 7,972 7,972 44 0.0002
2018-08-03 2018-06-30 13F EXTREME NETWORKS COM 30226D106 0 -11,000 -100.00 0 -100.00
2018-05-11 2018-03-31 13F EXTREME NETWORKS COM 30226D106 11,000 0 0.00 122 -11.59 0.0005
2018-02-08 2017-12-31 13F EXTREME NETWORKS COM 30226D106 11,000 -2,500 -18.52 138 -14.29 0.0005
2017-11-06 2017-09-30 13F EXTREME NETWORKS COM 30226D106 13,500 13,500 161 0.0006
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.