Alpha and Omega Semiconductor Limited
US ˙ NasdaqGS ˙ BMG6331P1041

SecurityAOSL / Alpha and Omega Semiconductor Limited
InstitutionSei Investments Co
Latest Disclosed Ownership83,618 shares
Latest Disclosed Value $ 1,656,478
Sei Investments Co reports 18.87% decrease in ownership of AOSL / Alpha and Omega Semiconductor Limited

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 83,618 shares of Alpha and Omega Semiconductor Limited (US:AOSL) valued at $1,656,473 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 103,072 shares of Alpha and Omega Semiconductor Limited. This represents a change in shares of -18.87% during the quarter. The current value of the position is $3,512,792 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 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 83,618 -19,454 -18.87 1,656 -42.52 0.0016
2025-11-13 2025-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 103,072 -672 -0.65 2,882 8.23 0.0031
2025-08-14 2025-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 103,744 19,920 23.76 2,662 27.80 0.0031
2025-05-14 2025-03-31 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 83,824 -2,260 -2.63 2,084 -34.64 0.0027
2025-05-13 2025-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 86,084 0 3,187 0.0035
2025-02-11 2024-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 86,084 -3,388 -3.79 3,188 -4.03 0.0041
2024-11-12 2024-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 89,472 -34,088 -27.59 3,321 -28.07 0.0043
2024-08-13 2024-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 123,560 15,259 14.09 4,617 93.50 0.0065
2024-05-07 2024-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 108,301 36,853 51.58 2,387 28.21 0.0035
2024-02-14 2023-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 71,448 -3,337 -4.46 1,862 -16.58 0.0030
2023-11-14 2023-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 74,785 -1,501 -1.97 2,232 -10.83 0.0040
2023-08-11 2023-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 76,286 87 0.11 2,502 21.87 0.0044
2023-05-12 2023-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 76,199 528 0.70 2,054 -5.00 0.0038
2023-02-10 2022-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 75,671 -601 -0.79 2,162 -7.89 0.0048
2022-11-14 2022-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 76,272 -22,594 -22.85 2,346 -28.82 0.0052
2022-08-15 2022-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 98,866 26,209 36.07 3,296 -17.00 0.0071
2022-05-13 2022-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 72,657 1,864 2.63 3,971 -7.37 0.0080
2022-02-14 2021-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 70,793 70,793 4,287 0.0080
2019-05-15 2019-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 0 -3,799 -100.00 0 -100.00
2019-02-13 2018-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 3,799 0 0.00 44 0.00 0.0002
2018-11-08 2018-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 3,799 3,699 3,699.00 44 4,300.00 0.0002
2018-08-03 2018-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 100 -32 -24.24 1 -50.00 0.0000
2018-05-11 2018-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 132 0 0.00 2 0.00 0.0000
2018-02-08 2017-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 132 0 0.00 2 0.00 0.0000
2017-11-06 2017-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 132 0 0.00 2 0.00 0.0000
2017-07-31 2017-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 132 132 2 0.0000
2017-05-05 2017-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 0 -846 -100.00 0 -100.00
2017-02-02 2016-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 846 159 23.14 18 20.00 0.0001
2016-11-04 2016-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 687 687 15 0.0001
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.