Alpha and Omega Semiconductor Limited
DE ˙ DB ˙ BMG6331P1041
€ 42,83 ↓ -0.46 (-1.06%)
2026-06-05
PREÇO DA AÇÃO
SecurityDE:AOY / Alpha and Omega Semiconductor Limited
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership20,500 shares
Latest Disclosed Value $ 406,105
Alliancebernstein L.p. reports 12.02% decrease in ownership of AOY / Alpha and Omega Semiconductor Limited

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 20,500 shares of Alpha and Omega Semiconductor Limited (DE:AOY) valued at $371,870 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 23,300 shares of Alpha and Omega Semiconductor Limited. This represents a change in shares of -12.02% during the quarter. The current value of the position is $878,015 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)
2026-05-15 2026-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 20,500 -2,800 -12.02 406 -11.93 0.0001
2026-02-17 2025-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 23,300 -8,790 -27.39 462 -48.61 0.0001
2025-11-14 2025-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 32,090 0 0.00 897 8.99 0.0003
2025-08-14 2025-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 32,090 -67 -0.21 823 3.00 0.0003
2025-05-15 2025-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 32,157 0 0.00 799 -32.86 0.0003
2025-02-12 2024-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 32,157 157 0.49 1,191 0.25 0.0004
2024-11-14 2024-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 32,000 2,680 9.14 1,188 8.40 0.0004
2024-08-14 2024-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 29,320 4,280 17.09 1,096 98.73 0.0004
2024-05-14 2024-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 25,040 5,990 31.44 552 11.09 0.0002
2024-02-14 2023-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 19,050 300 1.60 496 -11.27 0.0002
2023-11-14 2023-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 18,750 2,150 12.95 560 2.76 0.0002
2023-08-15 2023-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 16,600 -4,400 -20.95 544 -3.72 0.0002
2023-05-15 2023-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 21,000 -3,276 -13.49 566 -18.47 0.0002
2023-02-15 2022-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 24,276 24 0.10 694 -7.10 0.0003
2022-11-15 2022-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 24,252 803 3.42 746 -4.60 0.0004
2022-08-15 2022-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 23,449 3,149 15.51 782 -29.49 0.0004
2022-05-13 2022-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 20,300 10,800 113.68 1,109 92.87 0.0004
2022-02-14 2021-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 9,500 0 0.00 575 92.95 0.0002
2021-11-10 2021-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 9,500 -2,300 -19.49 298 -16.99 0.0001
2021-07-30 2021-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 11,800 0 0.00 359 -6.99 0.0001
2021-05-06 2021-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 11,800 -4,200 -26.25 386 2.12 0.0002
2021-02-08 2020-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 16,000 -12,400 -43.66 378 3.85 0.0002
2020-11-12 2020-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 28,400 -1,800 -5.96 364 10.64 0.0002
2020-08-13 2020-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 30,200 5,604 22.78 329 108.23 0.0002
2020-05-14 2020-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 24,596 4,096 19.98 158 -43.37 0.0001
2020-02-18 2019-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 20,500 0 0.00 279 10.71 0.0002
2019-11-14 2019-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 20,500 -100 -0.49 252 31.25 0.0002
2019-08-14 2019-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 20,600 -300 -1.44 192 -20.33 0.0001
2019-05-14 2019-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 20,900 3,400 19.43 241 35.39 0.0002
2019-02-13 2018-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 17,500 1,100 6.71 178 -6.81 0.0001
2018-11-08 2018-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 16,400 0 0.00 191 -18.38 0.0001
2018-08-13 2018-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 16,400 1,000 6.49 234 -1.68 0.0002
2018-05-14 2018-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 15,400 1,800 13.24 238 7.21 0.0002
2018-02-13 2017-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 13,600 0 0.00 222 -0.89 0.0002
2017-11-13 2017-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 13,600 0 0.00 224 -1.32 0.0002
2017-08-10 2017-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 13,600 13,600 227 0.0002
2015-08-14 2015-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 0 -1,700 -100.00 0 -100.00
2015-05-13 2015-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,700 0 0.00 15 0.00 0.0000
2015-02-13 2014-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,700 -36,225 -95.52 15 -95.79 0.0000
2014-11-13 2014-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 37,925 -3,000 -7.33 356 -6.07 0.0003
2014-08-13 2014-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 40,925 700 1.74 379 28.04 0.0003
2014-05-13 2014-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 40,225 -400 -0.98 296 -5.43 0.0003
2014-02-13 2013-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 40,625 -600 -1.46 313 -9.80 0.0003
2013-11-14 2013-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 41,225 -1,400 -3.28 347 6.44 0.0003
2013-08-13 2013-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 42,625 42,625 326 0.0003
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.