阿爾法和歐米茄半導體有限公司
DE ˙ DB ˙ BMG6331P1041
€42.83 ↓ -0.46 (-1.06%)
2026-06-05
分享價格
SecurityDE:AOY / Alpha and Omega Semiconductor Limited
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in AOY / Alpha and Omega Semiconductor Limited

2026-03-26 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of Alpha and Omega Semiconductor Limited (DE:AOY). This represents 0.0 percent ownership of the company. In their previous filing dated 2024-02-13 , Vanguard Group Inc had reported owning 2,085,173 shares, indicating a decrease of -100.00 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)
2026-03-26 2026-03-26 13G/A 2,085,173 0 -100.00 0.00 -100.00
2024-02-13 2024-02-13 13G/A 1,743,627 2,085,173 19.59 7.50 17.92
2023-02-09 2023-02-09 13G/A 1,642,937 1,743,627 6.13 6.36 2.09
2022-02-09 2022-02-09 13G 1,642,937 6.23

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)
2026-01-29 2025-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,424,320 -29,655 -1.21 48,026 -30.01 0.0007
2025-11-07 2025-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,453,975 33,959 1.40 68,613 10.49 0.0010
2025-08-11 2025-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,420,016 81,410 3.48 62,098 6.81 0.0010
2025-05-09 2025-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,338,606 -73,026 -3.03 58,138 -34.90 0.0011
2025-02-11 2024-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,411,632 14,070 0.59 89,303 0.34 0.0016
2024-11-13 2024-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,397,562 227,048 10.46 88,998 9.72 0.0016
2024-08-13 2024-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,170,514 45,158 2.12 81,112 73.16 0.0016
2024-05-10 2024-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,125,356 40,183 1.93 46,843 -13.80 0.0009
2024-03-11 2023-12-31 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,085,173 50,142 2.46 54,340 -10.52 0.0012
2024-02-14 2023-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,085,173 50,142 54,340 0.0010
2023-12-18 2023-09-30 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,035,031 1,753 0.09 60,725 -8.95 0.0015
2023-11-14 2023-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,035,031 1,753 60,725 0.0003
2023-08-14 2023-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 2,033,278 300,595 17.35 66,692 42.82 0.0016
2023-07-14 2023-03-31 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,732,683 -10,944 -0.63 46,696 -6.26 0.0012
2023-05-15 2023-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,732,683 -10,944 46,696 0.0012
2023-02-10 2022-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,743,627 38,993 2.29 49,815 -5.00 0.0014
2022-11-14 2022-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,704,634 -39,213 -2.25 52,435 -9.81 0.0015
2022-08-12 2022-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,743,847 -214,895 -10.97 58,140 -45.69 0.0016
2022-05-13 2022-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,958,742 315,805 19.22 107,047 7.59 0.0025
2022-02-14 2021-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,642,937 277,380 20.31 99,495 132.26 0.0023
2021-11-12 2021-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,365,557 92,560 7.27 42,838 10.73 0.0011
2021-08-13 2021-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,272,997 165,152 14.91 38,687 6.79 0.0010
2021-05-14 2021-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,107,845 62,331 5.96 36,227 46.58 0.0010
2021-02-12 2020-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,045,514 -429,126 -29.10 24,715 30.73 0.0007
2020-11-16 2020-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,474,640 -84,829 -5.44 18,905 11.42 0.0006
2020-08-14 2020-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,559,469 15,513 1.00 16,967 71.45 0.0006
2020-05-15 2020-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,543,956 556,266 56.32 9,896 -26.43 0.0004
2020-02-14 2019-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 987,690 28,210 2.94 13,452 14.16 0.0005
2019-11-14 2019-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 959,480 -211,255 -18.04 11,783 7.75 0.0004
2019-08-14 2019-06-30 13F ALPHA & OMEGA SEMICONDUCTOR LT SHS G6331P104 1,170,735 117,917 11.20 10,935 -9.76 0.0004
2019-05-15 2019-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,052,818 -132,057 -11.15 12,118 0.36 0.0005
2019-02-14 2018-12-31 13F ALPHA & OMEGA SEMICONDUCTOR LT SHS G6331P104 1,184,875 -64,604 -5.17 12,074 -16.91 0.0005
2018-12-13 2018-09-30 13F/A-2 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,249,479 -93,743 -6.98 14,531 -24.03 0.0006
2018-11-23 2018-09-30 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,249,479 0 14,531 0.0006
2018-11-14 2018-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,249,479 -93,743 14,531
2018-08-14 2018-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,343,222 149,366 12.51 19,127 3.69 0.0008
2018-05-15 2018-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,193,856 50,628 4.43 18,446 -1.38 0.0008
2018-02-14 2017-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,143,228 17,967 1.60 18,704 0.80 0.0008
2017-11-14 2017-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,125,261 3,367 0.30 18,556 -0.78 0.0009
2017-08-24 2017-06-30 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,121,894 143,303 14.64 18,702 11.18 0.0009
2017-08-11 2017-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,121,894 143,303 18,702
2017-05-12 2017-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 978,591 137,513 16.35 16,822 -5.97 0.0009
2017-02-14 2016-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 841,078 105,423 14.33 17,890 11.97 0.0010
2016-11-14 2016-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 735,655 65,219 9.73 15,978 71.09 0.0009
2016-08-10 2016-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 670,436 46,900 7.52 9,339 26.39 0.0006
2016-05-13 2016-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 623,536 97,587 18.55 7,389 52.89 0.0005
2016-02-08 2015-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 525,949 502,972 2,189.02 4,833 2,600.00 0.0003
2015-11-12 2015-09-30 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 22,977 -466,921 -95.31 179 -95.82 0.0000
2015-11-12 2015-09-30 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 1,004,423 514,525 7,825 0.0003
2015-11-12 2015-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 5,159,242 188,126
2015-08-13 2015-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 489,898 5,950 1.23 4,281 -0.72 0.0003
2015-05-15 2015-03-31 13F/A-1 ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 483,948 18,121 3.89 4,312 4.58 0.0003
2015-05-14 2015-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 483,948 4,312
2015-02-12 2014-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 465,827 12,301 2.71 4,123 -3.28 0.0003
2014-11-12 2014-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 453,526 33,149 7.89 4,263 9.39 0.0003
2014-08-11 2014-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 420,377 35,968 9.36 3,897 37.75 0.0003
2014-05-13 2014-03-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 384,409 35,961 10.32 2,829 5.28 0.0002
2014-02-12 2013-12-31 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 348,448 5,300 1.54 2,687 -6.90 0.0002
2013-11-07 2013-09-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 343,148 8,235 2.46 2,886 12.78 0.0003
2013-08-13 2013-06-30 13F ALPHA & OMEGA SEMICONDUCTOR SHS G6331P104 334,913 334,913 2,559 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.