OSI Systems
OSIS
339 hedge funds and large institutions have $4.2B invested in OSI Systems in 2025 Q2 according to their latest regulatory filings, with 62 funds opening new positions, 117 increasing their positions, 124 reducing their positions, and 26 closing their positions.
292% more call options, than puts
Call options by funds: $56.3M | Put options by funds: $14.4M
138% more first-time investments, than exits
New positions opened: 62 | Existing positions closed: 26
11% more capital invested
Capital invested by funds: $3.79B → $4.2B (+$413M)
10% more funds holding
Funds holding: 309 → 339 (+30)
6% less repeat investments, than reductions
Existing positions increased: 117 | Existing positions reduced: 124
4.74% less ownership
Funds ownership: 116% → 111.27% (-4.7%)
29% less funds holding in top 10
Funds holding in top 10: 7 → 5 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$47.9M |
| 2 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
+$21.9M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$15.6M |
| 4 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$13.8M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$12.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS AM
Chicago,
Illinois
|
-$64.4M |
| 2 |
Janus Henderson Group
London,
United Kingdom
|
-$38.9M |
| 3 |
SCM
SG Capital Management
Chicago,
Illinois
|
-$36.7M |
| 4 |
Dimensional Fund Advisors
Austin,
Texas
|
-$30.2M |
| 5 |
CCMG
Clark Capital Management Group
Philadelphia,
Pennsylvania
|
-$25.3M |
OSIS Hedge Fund Activity: Q2 2025 in Review
339 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in OSI Systems (OSIS) for Q2 2025, worth a combined $4.2B — up 11% from $3.79B a quarter earlier.
Buyers outnumbered sellers: 62 funds opened new OSIS positions and 26 closed out — a net gain of 36 holders — while 117 added to existing stakes and 124 trimmed.
The largest buyer was Millennium Management, opening a new position worth an estimated $47.9M. The largest seller was UBS AM, cutting an estimated $64.4M.
- 339 institutional investors held OSI Systems (OSIS) as of Q2 2025, up from 309 in Q1 2025.
- Funds reported $4.2B of OSI Systems stock for Q2 2025, up 11% quarter-over-quarter.
- 62 funds opened new OSI Systems positions in Q2 2025 and 26 closed out, a net change of +36 holders.
- The largest OSI Systems buyer in Q2 2025 was Millennium Management, an estimated $47.9M added.
- The largest OSI Systems seller in Q2 2025 was UBS AM, an estimated $64.4M sold.
Based on aggregated 13F filings for Q2 2025.