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OSIS in the 13F filings

Osi Systems Inc · CUSIP 671044105

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
21
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 4 listed it in both
Shares listed
3,970,504
combined, among listed positions
Reported value
$1.1bn
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: 12 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +334,884.

Managers listing OSIS 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.

21 of 21 holders

ActionFiling
Fidelity (FMR LLC)1,967,088$522munder 0.1%Added+309,65815 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd772,314$205m0.10%Added+19,74718 May 2026 (the filing on sec.gov)
Invesco Ltd373,274$99munder 0.1%Trimmed-51,92312 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC303,923$81m0.06%Added+3,13127 Oct 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc259,545$69munder 0.1%Added+4,48315 May 2026 (the filing on sec.gov)
Wellington Management Group LLP93,754$25munder 0.1%Added+43,89315 May 2026 (the filing on sec.gov)
Millennium Management LLC43,610$12munder 0.1%Trimmed-13515 May 2026 (the filing on sec.gov)
PDT Partners LLC42,104$11m0.66%Held015 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC24,662$6.5munder 0.1%Trimmed-1,90214 May 2026 (the filing on sec.gov)
AQR Capital Management LLC19,113$5.1munder 0.1%Trimmed-32415 May 2026 (the filing on sec.gov)
AllianceBernstein LP18,208$4.6munder 0.1%Trimmed-1,01315 May 2026 (the filing on sec.gov)
Citadel Advisors LLC14,948$4.0munder 0.1%Added+13,71515 May 2026 (the filing on sec.gov)
Marshall Wace LLP10,183$2.7munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.7,285$1.9munder 0.1%Trimmed-19415 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP6,826$1.8munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Two Sigma Investments LP4,900$1.3munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC4,065$1.1munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Bridgewater Associates LP3,214$853kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Winton Group Ltd1,151$306kunder 0.1%Trimmed-36912 May 2026 (the filing on sec.gov)
Walleye Capital LLC217$58kunder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Quantbot Technologies LP120$32kunder 0.1%Trimmed-3,40213 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 (6)

Exited (2)

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.
2 in Q3 2024 to 5 in Q2 2026

Tracked managers listing it, at least.

0246820142015201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
OSIS by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20132$5.5mn.a.n.a.
Q1 20142$6.7mn.a.n.a.
Q2 20141$4.9mn.a.n.a.
Q4 20142$5.8mn.a.n.a.
Q1 20151$5.3mn.a.n.a.
Q2 20172$110mn.a.n.a.
Q3 20173$157mn.a.n.a.
Q4 20174$79mn.a.n.a.
Q1 20183$89mn.a.n.a.
Q2 20181$114mn.a.n.a.
Q3 20181$113mn.a.n.a.
Q4 20183$148mn.a.n.a.
Q1 20194$157mn.a.n.a.
Q2 20196$222mn.a.n.a.
Q3 20197$249mn.a.n.a.
Q4 20197$320mn.a.n.a.
Q1 20204$196mn.a.n.a.
Q2 20201$138mn.a.n.a.
Q3 20203$155mn.a.n.a.
Q4 20202$173mn.a.n.a.
Q1 20212$178mn.a.n.a.
Q2 20212$186mn.a.n.a.
Q3 20212$173mn.a.n.a.
Q4 20212$172mn.a.n.a.
Q1 20222$152mn.a.n.a.
Q2 20222$157mn.a.n.a.
Q3 20222$132mn.a.n.a.
Q4 20222$148mn.a.n.a.
Q1 20232$181mn.a.n.a.
Q2 20233$223mn.a.n.a.
Q3 20233$185mn.a.n.a.
Q4 20234$230m22
Q1 20243$254m21
Q2 20242$206m02
Q3 20242$235m20
Q4 20244$269m31
Q1 20254$314m22
Q2 20255$323m23
Q3 20254$343m12
Q4 20254$286m619
Q1 20265$826m1210
Q2 20265$290m149

Compare with…

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

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

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 OSIS, latest filings →Back to the 13F Explorer →