OSI Systems
OSIS
366 hedge funds and large institutions have $4.14B invested in OSI Systems in 2026 Q2 according to their latest regulatory filings, with 61 funds opening new positions, 129 increasing their positions, 135 reducing their positions, and 58 closing their positions.
26% more call options, than puts
Call options by funds: $19.9M | Put options by funds: $15.8M
7.72% more ownership
Funds ownership: 111.04% → 118.76% (+7.7%)
5% more first-time investments, than exits
New positions opened: 61 | Existing positions closed: 58
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
1% less funds holding
Funds holding: 368 → 366 (-2)
4% less repeat investments, than reductions
Existing positions increased: 129 | Existing positions reduced: 135
17% less capital invested
Capital invested by funds: $5B → $4.14B (-$864M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$62.4M |
| 2 |
William Blair Investment Management
Chicago,
Illinois
|
+$50.9M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
+$42.2M |
| 4 |
CCM
Channing Capital Management
Chicago,
Illinois
|
+$40.7M |
| 5 |
VOYA Investment Management
Atlanta,
Georgia
|
+$28.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Mawer Investment Management
Calgary,
Alberta, Canada
|
-$176M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$56.1M |
| 3 |
Loomis, Sayles & Company
Boston,
Massachusetts
|
-$41.3M |
| 4 |
Bank of America
Charlotte,
North Carolina
|
-$31.6M |
| 5 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
-$31.3M |
OSIS Hedge Fund Activity: Q2 2026 in Review
366 of the 8,349 institutional investors tracked by Wall St. Rank reported a position in OSI Systems (OSIS) for Q2 2026, worth a combined $4.14B — down 17% from $5B a quarter earlier.
Buyers outnumbered sellers: 61 funds opened new OSIS positions and 58 closed out — a net gain of 3 holders — while 129 added to existing stakes and 135 trimmed.
The largest buyer was Millennium Management, adding an estimated $62.4M. The largest seller was Mawer Investment Management, exiting entirely with an estimated $176M sold.
- 366 institutional investors held OSI Systems (OSIS) as of Q2 2026, down from 368 in Q1 2026.
- Funds reported $4.14B of OSI Systems stock for Q2 2026, down 17% quarter-over-quarter.
- 61 funds opened new OSI Systems positions in Q2 2026 and 58 closed out, a net change of +3 holders.
- The largest OSI Systems buyer in Q2 2026 was Millennium Management, an estimated $62.4M added.
- The largest OSI Systems seller in Q2 2026 was Mawer Investment Management, an estimated $176M sold.
Based on aggregated 13F filings for Q2 2026.