OSI Systems
OSIS
351 hedge funds and large institutions have $4.66B invested in OSI Systems in 2025 Q3 according to their latest regulatory filings, with 57 funds opening new positions, 109 increasing their positions, 136 reducing their positions, and 42 closing their positions.
58% more call options, than puts
Call options by funds: $17.5M | Put options by funds: $11.1M
36% more first-time investments, than exits
New positions opened: 57 | Existing positions closed: 42
3% more funds holding
Funds holding: 341 → 351 (+10)
2% more capital inflows, than outflows
Capital inflows: $334M | Capital outflows: $328M
0% more funds holding in top 10
Funds holding in top 10: 5 → 5 (0)
0.16% less ownership
Funds ownership: 111.27% → 111.11% (-0.16%)
20% less repeat investments, than reductions
Existing positions increased: 109 | Existing positions reduced: 136
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Mawer Investment Management
Calgary,
Alberta, Canada
|
+$78.5M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$43.6M |
| 3 |
Mirae Asset Global ETFs Holdings
Causeway Bay,
Hong Kong
|
+$36.9M |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$28.1M |
| 5 |
Loomis, Sayles & Company
Boston,
Massachusetts
|
+$20.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$32.6M |
| 2 |
Millennium Management
New York
|
-$29.3M |
| 3 |
Fidelity Investments
Boston,
Massachusetts
|
-$22.9M |
| 4 |
Cubist Systematic Strategies
Stamford,
Connecticut
|
-$13.5M |
| 5 |
Janus Henderson Group
London,
|
-$12M |
OSIS Hedge Fund Activity: Q3 2025 in Review
351 of the 7,656 institutional investors tracked by Wall St. Rank reported a position in OSI Systems (OSIS) for Q3 2025, worth a combined $4.66B — up 11% from $4.2B a quarter earlier.
Buyers outnumbered sellers: 57 funds opened new OSIS positions and 42 closed out — a net gain of 15 holders — while 109 added to existing stakes and 136 trimmed.
The largest buyer was Mawer Investment Management, adding an estimated $78.5M. The largest seller was T. Rowe Price Investment Management, exiting entirely with an estimated $32.6M sold.
- 351 institutional investors held OSI Systems (OSIS) as of Q3 2025, up from 341 in Q2 2025.
- Funds reported $4.66B of OSI Systems stock for Q3 2025, up 11% quarter-over-quarter.
- 57 funds opened new OSI Systems positions in Q3 2025 and 42 closed out, a net change of +15 holders.
- The largest OSI Systems buyer in Q3 2025 was Mawer Investment Management, an estimated $78.5M added.
- The largest OSI Systems seller in Q3 2025 was T. Rowe Price Investment Management, an estimated $32.6M sold.
Based on aggregated 13F filings for Q3 2025.