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AOSL in the 13F filings

Alpha & Omega Semiconductor · CUSIP G6331P104

Sector · SemiconductorsTheme · AI infrastructure and semiconductors· L3VLUP-definedTheme · Semiconductors
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
22
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 1 listed it in both
Shares listed
4,030,045
combined, among listed positions
Reported value
$190m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 13 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +442,700.

Managers listing AOSL in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

22 of 22 holders

ActionFiling
Two Sigma Investments LP951,576$45munder 0.1%Added+398,56514 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)791,715$37munder 0.1%Added+247,00613 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP412,910$20munder 0.1%Trimmed-281,89814 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC323,866$15munder 0.1%Added+113,22613 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.284,225$13munder 0.1%Added+4,63714 Aug 2026 (the filing on sec.gov)
Millennium Management LLC267,648$13munder 0.1%Added+69,86614 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC234,335$11munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Invesco Ltd207,842$9.8munder 0.1%Trimmed-167,93114 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp144,312$6.8munder 0.1%Added+74,76214 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP96,522$4.6munder 0.1%Added+54,78714 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC83,433$3.9munder 0.1%Trimmed-58,22414 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC39,368$1.9munder 0.1%Added+2,9342 Sep 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc39,104$1.9munder 0.1%Added+6,28114 Aug 2026 (the filing on sec.gov)
Winton Group Ltd34,889$1.7m0.05%Trimmed-26,0437 Aug 2026 (the filing on sec.gov)
MFS Investment Management26,638$1.3munder 0.1%Trimmed-1,0623 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC19,063$902kunder 0.1%Added+7927 Oct 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP16,483$780kunder 0.1%Trimmed-2,68814 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP33,698$747kunder 0.1%Added+13,19814 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd13,485$638kunder 0.1%Held014 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP6,000$284kunder 0.1%Trimmed-14,40013 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP2,250$106kunder 0.1%Trimmed-14,96212 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC683$32kunder 0.1%Newnew3 Aug 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Exited (4)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
4 in Q3 2024 to 2 in Q2 2026

Tracked managers listing it, at least.

0123420152016201720182019202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
AOSL by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20141$1.1mn.a.n.a.
Q1 20151$2.4mn.a.n.a.
Q1 20161$4.4mn.a.n.a.
Q2 20162$8.2mn.a.n.a.
Q3 20162$20mn.a.n.a.
Q4 20162$20mn.a.n.a.
Q1 20171$13mn.a.n.a.
Q2 20171$9.8mn.a.n.a.
Q3 20172$9.8mn.a.n.a.
Q4 20172$8.0mn.a.n.a.
Q1 20182$5.5mn.a.n.a.
Q2 20181$395kn.a.n.a.
Q3 20181$133kn.a.n.a.
Q4 20181$199kn.a.n.a.
Q1 20191$225kn.a.n.a.
Q2 20191$183kn.a.n.a.
Q3 20191$240kn.a.n.a.
Q1 20211$7.2mn.a.n.a.
Q2 20212$8.0mn.a.n.a.
Q3 20213$9.3mn.a.n.a.
Q4 20214$31mn.a.n.a.
Q1 20223$12mn.a.n.a.
Q2 20221$2.8mn.a.n.a.
Q3 20221$3.5mn.a.n.a.
Q4 20221$3.9mn.a.n.a.
Q1 20232$6.8mn.a.n.a.
Q2 20232$12mn.a.n.a.
Q3 20232$13mn.a.n.a.
Q4 20234$12m31
Q1 20244$12m40
Q2 20244$22m31
Q3 20244$37m14
Q4 20242$12m02
Q1 20252$8.6m11
Q2 20252$9.7m20
Q3 20253$11m03
Q4 20252$3.1m189
Q1 20263$2.8m1412
Q2 20262$17m1312

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

AOSL and NVDA →AOSL and AVGO →AOSL and MU →Choose a stock to compare with AOSL →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own AOSL, latest filings →Back to the 13F Explorer →