Filing Flows

Filing Flows › OSI Systems (OSIS) › Who owns the stock

Who owns OSI Systems (OSIS) stock

349 funds reported OSI Systems (OSIS) shares in their latest 13F filings, worth $4.8B in all. The largest holder is BlackRock ($558M). Last quarter 166 funds added to their stakes and 173 cut them.

Largest holders of OSIS (13F)Largest holders of OSIS (13F)BlackRock$558MVanguard Group$537MFMR LLC$380MVanguard Portfolio Management LLC$278MJanus Henderson Group$205MJupiter Topco LLC$198MVanguard Capital Management LLC$154MState Street$147MCapital International Investors$130MGeode Capital Management, LLC$101M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock2,552,027$558Mincrease2026-06-30
Vanguard Group2,106,595$537Mdecrease2025-12-31
FMR LLC1,738,166$380Mdecrease2026-06-30
Vanguard Portfolio Management LLC1,272,016$278Mincrease2026-06-30
Janus Henderson Group772,314$205Mincrease2026-03-31
Jupiter Topco LLC905,925$198Mbase2026-06-30
Vanguard Capital Management LLC703,070$154Mincrease2026-06-30
State Street674,053$147Mincrease2026-06-30
Capital International Investors596,331$130Mdecrease2026-06-30
Geode Capital Management, LLC463,787$101Mincrease2026-06-30
UBS AM, a distinct business unit of UBS Asset Management Americas LLC452,547$99.0Mincrease2026-06-30
Hood River Capital Management LLC414,304$90.6Mincrease2026-06-30
Dimensional Fund Advisors LP414,034$90.5Mincrease2026-06-30
William Blair Investment Management, LLC379,351$83.0Mincrease2026-06-30
Channing Capital Management, LLC414,703$80.6Mdecrease2026-09-30

OSI Systems' latest quarter

OSI Systems, Q1 FY27: revenue $403M (+5% year over year), operating margin 8.3%, net earnings $24.6M, operating cash flow $37.1M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most OSIS stock?

By the latest 13F filings: BlackRock ($558M); Vanguard Group ($537M); FMR LLC ($380M); Vanguard Portfolio Management LLC ($278M); Janus Henderson Group ($205M).

What is the short interest in OSIS?

2,014,663 shares were sold short at the 2026-10-15 settlement, -3.44% of the float.

Open the interactive view →

Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.