Which hedge funds own OSIS? OSI SYSTEMS INC, Q2 2026 13F holders
29 tracked hedge funds disclosed a position in OSIS (OSI SYSTEMS INC) in their Q2 2026 13F filings, worth $132.9m in total. The largest holder by portfolio weight is Prospect Capital Advisors, LLC at 5.7% of its book. 14 opened a new position this quarter: Divisadero Street Capital Management, LP, Bayforest Capital Ltd, Skylands Capital, LLC, Dark Forest Capital Management LP. 9 exited: Shannon River Fund Management LLC, SG Capital Management LLC, Lombard Odier Asset Management (USA) Corp.
- 29
- Holders Tracked managers whose filing for the quarter reports a long equity position in the security.
- 14
- New this quarter Holders whose previous filing (at most two quarters earlier) did not report the security.
- 9
- Exited this quarter Tracked managers whose previous filing reported the security and whose filing for the quarter does not.
- $18.9m
- Inflow, new holders Combined value of the positions the new holders reported for the quarter.
- $32.1m
- Outflow, exits Combined value the exiting managers reported for the security in their previous filing.
- $133m
- Combined value Sum of the holders' reported positions in the security.
- 2.3%
- Share of managers holding Holders as a share of tracked managers filing for that quarter. Comparable across the 2024 coverage expansion, where the raw holder count is not.
Holders, Q2 2026
Exited since the previous filing
| Shannon River Fund Management LLC | 1.0% | $5.1m |
| SG Capital Management LLC | 0.6% | $7.2m |
| Lombard Odier Asset Management (USA) Corp | 0.5% | $957k |
| Axiom Investors LLC | 0.1% | $12.0m |
| Atom Investors LP | 0.1% | $1.4m |
| Aquatic Capital Management LLC | 0.02% | $616k |
| Bridgewater Associates, LP | 0.0% | $853k |
| Citadel Advisors LLC | 0.0% | $4.0m |
| Walleye Capital LLC | 0.0% | $57.6k |
Ownership over time
Who discovered OSIS first? Beta
The run: Q1 2001 → Q2 2007, +758%
| Prospect Capital Advisors, LLC high conviction | Q3 2016 | – | +8.4 pts |
| SG Capital Management LLC | Q3 2014 | – | +1.7 pts |
| Clearline Capital LP high conviction | Q1 2018 | – | +1.4 pts |
| G2 Investment Partners Management LLC high conviction | Q4 2016 | – | +1.2 pts |
| Manatuck Hill Partners, LLC | Q2 2023 | – | +1.1 pts |
| Tremblant Capital Group high conviction | Q2 2013 | – | +1.0 pts |
| Ionic Capital Management LLC | Q1 2014 | – | +0.5 pts |
| TradeLink Capital LLC | Q1 2025 | – | +0.4 pts |
Split-adjusted quarter-end prices, excluding dividends. They describe the stock while each manager held it, not the return it earned.