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AOSL · ALPHA & OMEGA SEMICONDUCTOR Ltd

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$28.38 -2.69 (-8.66%) At close · Aug 18
Market Cap
$849.40M
Shares
29.93M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 216
Total Value: $1,149,746,227
Total Shares: 24,292,127

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 216 13F filers · Δ vs Mar 31, 2026
Top Holder
17.5%
Sep 2023 → Jun 2026 · range 16.4% – 21.0%
+0.0 pts
Top 5
42.9%
Sep 2023 → Jun 2026 · range 42.9% – 57.0%
−0.2 pts
Top 10
61.3%
Sep 2023 → Jun 2026 · range 58.7% – 69.1%
+2.6 pts
HHI
593
Sep 2023 → Jun 2026 · range 565 – 842
Broadly held+28

Quarterly Activity

vs Mar 31, 2026
New
65
Increased
60
Decreased
65
Sold Out
30
Unchanged
26
Holder count: +35
Institutional value: +132.6%
Shares held: +8.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 228
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1387467 CUSIP G6331P104 13F (30d) 200 filings 199 filers Visit website Investor relations