OSI Systems Inc: which funds bought and sold
Institutions that bought and sold OSI Systems shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 179 institutions that filed 13F reports for both quarters added to or opened positions in OSI Systems, and 190 cut or closed them. Together they sold a net 18K shares, −0.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 280K shares (−5.1%); index fund managers were net buyers of 86K shares (+1.4%). 52 opened a new position and 57 sold out entirely.
Bought, Q2 2026 179 institutions, 52 of them new holders Sold, Q2 2026 190 institutions, 57 of them sold out
Net change, all compared −18K shares (−0.1%)
Net change, active managers −280K shares (−5.1%), 28 bought, 24 sold
Buyers versus sellers
179 bought 40 190 sold
Active managers and hedge funds 28 bought · 24 sold · −280K
Index fund managers 7 bought · 4 sold · +86K
Other institutions 144 bought · 162 sold · +176K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Millennium Management LLC Hedge fund | +255K +584.4% | 298K | $65.3M |
| William Blair Investment Management, LLC Active manager | +208K +121.0% | 379K | $83M |
| American Century Companies Inc Active manager | +172K +337.6% | 223K | $48.8M |
| Channing Capital Management, LLC | +166K +62.2% | 433K | $94.7M |
| Voya Investment Management LLC | +116K +1276.4% | 125K | $27.4M |
| T. Rowe Price Investment Management, Inc. Active manager | +102K New position | 102K | $22.2M |
| Ameriprise Financial Inc | +91K +97.0% | 185K | $40.5M |
| Wellington Management Group LLP Active manager | +84K +89.4% | 178K | $38.8M |
| First Eagle Investment Management, LLC Active manager | +80K +323.0% | 104K | $22.8M |
| UBS Group AG | +75K +55.1% | 211K | $46.1M |
| Price T Rowe Associates Inc Active manager | +55K +21.3% | 315K | $68.8M |
| Goldman Sachs Group Inc | +45K +59.3% | 120K | $26.2M |
| Hood River Capital Management LLC | +42K +11.3% | 414K | $90.6M |
| New York State Common Retirement Fund | +37K +52.0% | 109K | $23.8M |
| Neumeier Poma Investment Counsel LLC | +31K +16.2% | 223K | $48.7M |
| Divisadero Street Capital Management, LP | +28K New position | 28K | $6.1M |
| Geode Capital Management, LLC Index funds | +23K +5.2% | 464K | $101M |
| Xtx Topco Ltd | +23K New position | 23K | $5M |
| Blackrock, Inc. Index funds | +22K +0.9% | 2.6M | $558M |
| Vanguard Portfolio Management LLC Index funds | +22K +1.8% | 1.3M | $278M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Millennium Management LLC Hedge fund | +255K +584.4% | 298K | $65.3M |
| William Blair Investment Management, LLC Active manager | +208K +121.0% | 379K | $83M |
| American Century Companies Inc Active manager | +172K +337.6% | 223K | $48.8M |
| T. Rowe Price Investment Management, Inc. Active manager | +102K New position | 102K | $22.2M |
| Wellington Management Group LLP Active manager | +84K +89.4% | 178K | $38.8M |
| First Eagle Investment Management, LLC Active manager | +80K +323.0% | 104K | $22.8M |
| Price T Rowe Associates Inc Active manager | +55K +21.3% | 315K | $68.8M |
| Neuberger Berman Group LLC Active manager | +21K +6.8% | 325K | $70.9M |
| Primecap Management Co Active manager | +14K +5.5% | 258K | $56.5M |
| D. E. Shaw & Co., Inc. Hedge fund | +13K +182.8% | 21K | $4.5M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Mawer Investment Management Ltd. Active manager | −663K Sold out | 0 | — |
| FMR LLC Active manager | −229K −11.6% | 1.7M | $380M |
| Loomis Sayles & Co L P Active manager | −169K −88.1% | 23K | $5M |
| Bank Of America Corp | −129K −48.4% | 137K | $30M |
| Driehaus Capital Management LLC Active manager | −118K Sold out | 0 | — |
| Invesco Ltd. | −110K −29.5% | 263K | $57.6M |
| Clark Capital Management Group, Inc. | −52K −19.0% | 219K | $47.9M |
| Axiom Investors LLC Active manager | −45K Sold out | 0 | — |
| Nomura Asset Management International Inc. | −45K −27.7% | 117K | $25.5M |
| Lord, Abbett & Co. LLC | −43K Sold out | 0 | — |
| Mirae Asset Global Etfs Holdings Ltd. | −40K −17.4% | 192K | $41.9M |
| Nicholas Investment Partners, LP | −32K Sold out | 0 | — |
| Clearbridge Investments, LLC Active manager | −28K −17.3% | 135K | $29.6M |
| SG Capital Management LLC | −27K Sold out | 0 | — |
| Capital International Investors Active manager | −23K −3.7% | 596K | $130M |
| Asset Management One Co., Ltd. | −21K −24.7% | 63K | $13.7M |
| Shannon River Fund Management LLC Hedge fund | −19K Sold out | 0 | — |
| Mirova | −19K −29.2% | 46K | $10.1M |
| BNP Paribas Financial Markets | −18K −18.2% | 80K | $17.5M |
| Harvest Investment Services, LLC | −15K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Mawer Investment Management Ltd. Active manager | −663K Sold out | 0 | — |
| FMR LLC Active manager | −229K −11.6% | 1.7M | $380M |
| Loomis Sayles & Co L P Active manager | −169K −88.1% | 23K | $5M |
| Driehaus Capital Management LLC Active manager | −118K Sold out | 0 | — |
| Axiom Investors LLC Active manager | −45K Sold out | 0 | — |
| Clearbridge Investments, LLC Active manager | −28K −17.3% | 135K | $29.6M |
| Capital International Investors Active manager | −23K −3.7% | 596K | $130M |
| Shannon River Fund Management LLC Hedge fund | −19K Sold out | 0 | — |
| Citadel Advisors LLC Hedge fund | −15K Sold out | 0 | — |
| Marshall Wace, LLP Hedge fund | −7,383 −72.5% | 2,800 | $612,360 |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| T. Rowe Price Investment Management, Inc.Active manager | 102K | $22.2M |
| Divisadero Street Capital Management, LP | 28K | $6.1M |
| Xtx Topco Ltd | 23K | $5M |
| Hilton Capital Management, LLC | 15K | $3.4M |
| Trexquant Investment LPHedge fund | 13K | $2.9M |
| Park Avenue Securities LLC | 7,779 | $1.7M |
| Boothbay Fund Management, LLCHedge fund | 6,970 | $1.5M |
| Equitable Holdings, Inc. | 5,119 | $1.1M |
| Dynamic Technology Lab Private Ltd | 4,596 | $1M |
| Engineers Gate Manager LPHedge fund | 4,143 | $906,074 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Mawer Investment Management Ltd.Active manager | 663K | $176M |
| Driehaus Capital Management LLCActive manager | 118K | $31.3M |
| Axiom Investors LLCActive manager | 45K | $12M |
| Lord, Abbett & Co. LLC | 43K | $11.5M |
| Nicholas Investment Partners, LP | 32K | $8.4M |
| SG Capital Management LLC | 27K | $7.2M |
| Shannon River Fund Management LLCHedge fund | 19K | $5.1M |
| Harvest Investment Services, LLC | 15K | $4M |
| Citadel Advisors LLCHedge fund | 15K | $4M |
| Canada Pension Plan Investment Board | 10K | $2.8M |
Who holds the shares
- Institutions reporting
- 358
- Ten largest holders
- 51.6% of 13F-reported shares
- Index fund managers
- 32.6% of 13F-reported shares
- Active managers and hedge funds
- 27.4% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 28 | 24 | 8 | 8 | −280K | −5.1% |
| Index fund managers | 7 | 4 | 0 | 0 | +86K | +1.4% |
| Other institutions | 144 | 162 | 44 | 49 | +176K | +2.7% |