Stock Ownership/OSIS

OSI SYSTEMS INC (OSIS): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in OSIS · Information Technology. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
13
13F filers
Aggregate Value
$175.5M
Across holders
Last Price
$204.05
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity8 increased4 reduced5 exited
Full exits: AXIOM INVESTORS LLC /DE, Bridgewater Associates, LP, CITADEL ADVISORS LLC, FRED ALGER MANAGEMENT, LLC, Walleye Capital LLC
Institutional Holders of OSIS
↗
13 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund298K$65.3M37.2%0.0%Added+$55.7MQ2 2026
PRIMECAP MANAGEMENT CO/CA/
CIK 0000763212
Institutional Manager258K$56.5M32.2%0.0%Added+$3.0MQ2 2026
Clearbridge Investments, LLC
CIK 0001348883
Hedge Fund135K$29.6M16.9%0.0%Reduced$-6.2MQ2 2026
First Eagle Investment Management, LLC
CIK 0001325447
Institutional Manager52K$11.4M6.5%0.0%Added+$628KQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund21K$4.5M2.6%0.0%Added+$2.9MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund18K$3.8M2.2%0.0%Reduced+$3.7MQ2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund6K$1.2M0.7%0.0%Added$-513KQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund5K$1.1M0.6%0.0%Unchanged+$481KQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund3K$612K0.3%0.0%Reduced$-376KQ2 2026
Gotham Asset Management, LLC
CIK 0001510387
Hedge Fund3K$580K0.3%0.0%Added+$2KQ2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$65.3M· 37.2% of total· 0.0% port· 298K sh· +$55.7M QoQ· Q2 2026
PRIMECAP MANAGEMENT CO/CA/Added
Institutional Manager
$56.5M· 32.2% of total· 0.0% port· 258K sh· +$3.0M QoQ· Q2 2026
Clearbridge Investments, LLCReduced
Hedge Fund
$29.6M· 16.9% of total· 0.0% port· 135K sh· $-6.2M QoQ· Q2 2026
First Eagle Investment Management, LLCAdded
Institutional Manager
$11.4M· 6.5% of total· 0.0% port· 52K sh· +$628K QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$4.5M· 2.6% of total· 0.0% port· 21K sh· +$2.9M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$3.8M· 2.2% of total· 0.0% port· 18K sh· +$3.7M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$1.2M· 0.7% of total· 0.0% port· 6K sh· $-513K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPUnchanged
Hedge Fund
$1.1M· 0.6% of total· 0.0% port· 5K sh· +$481K QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$612K· 0.3% of total· 0.0% port· 3K sh· $-376K QoQ· Q2 2026
Gotham Asset Management, LLCAdded
Hedge Fund
$580K· 0.3% of total· 0.0% port· 3K sh· +$2K QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$529K· 0.3% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$356K· 0.2% of total· 0.0% port· 2K sh· $-254K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$16K· 0.0% of total· 0.0% port· 74 sh· — QoQ· Q2 2026
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