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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
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
24
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 2 listed it in both
Shares listed
3,587,345
combined, among listed positions
Reported value
$79m
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: 14 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +235,742.

Managers listing AOSL in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

24 of 24 holders

ActionFiling
Wellington Management Group LLP694,808$15munder 0.1%Trimmed-331,14515 May 2026 (the filing on sec.gov)
Two Sigma Investments LP553,011$12munder 0.1%Added+274,89415 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)544,709$12munder 0.1%Added+29,61415 May 2026 (the filing on sec.gov)
Invesco Ltd375,773$8.3munder 0.1%Trimmed-5,99412 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.279,588$6.2munder 0.1%Added+119,00015 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC210,640$4.7munder 0.1%Added+77,13713 May 2026 (the filing on sec.gov)
Millennium Management LLC197,782$4.4munder 0.1%Added+137,79915 May 2026 (the filing on sec.gov)
AQR Capital Management LLC141,657$3.1munder 0.1%Added+59,62515 May 2026 (the filing on sec.gov)
Point72 Asset Management LP129,287$2.9munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Tudor Investment Corp69,550$1.5munder 0.1%Added+54,14915 May 2026 (the filing on sec.gov)
Winton Group Ltd60,932$1.4munder 0.1%Trimmed-76,33312 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP41,735$925kunder 0.1%Trimmed-18,60315 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC40,000$886kunder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Citadel Advisors LLC36,434$807kunder 0.1%Trimmed-72,38415 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc32,823$728kunder 0.1%Added+4,96515 May 2026 (the filing on sec.gov)
MFS Investment Management27,700$614kunder 0.1%Trimmed-73914 May 2026 (the filing on sec.gov)
PDT Partners LLC25,375$562kunder 0.1%Added+4,08815 May 2026 (the filing on sec.gov)
Marshall Wace LLP20,400$452kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP19,171$425kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC18,984$421kunder 0.1%Newnew27 Oct 2026 (the filing on sec.gov)
AllianceBernstein LP20,500$406kunder 0.1%Trimmed-2,80015 May 2026 (the filing on sec.gov)
Quantbot Technologies LP17,212$381kunder 0.1%Trimmed-18,73213 May 2026 (the filing on sec.gov)
Verition Fund Management LLC15,789$350kunder 0.1%Trimmed-60,04815 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd13,485$299kunder 0.1%Held018 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 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 (5)

Exited (3)

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 →