OSI SYSTEMS INC (OSIS) — Institutional Holders, Q2 2026
388 institutional investment managers reported a OSIS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $4.5B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
OSIS in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- MILLENNIUM MANAGEMENTAdded · +254,870 sh+$55.7M
- WILLIAM BLAIR INVESTMENT MANAGEMENTAdded · +207,684 sh+$45.4M
- AMERICAN CENTURY COMPANIESAdded · +172,148 sh+$37.6M
- Channing Capital ManagementAdded · +165,967 sh+$36.3M
- VOYA INVESTMENT MANAGEMENTAdded · +116,098 sh+$25.4M
Biggest sellers
- Mawer Investment Management Ltd.Sold out · -662,634 sh-$144.9M
- FMRTrimmed · -228,922 sh-$50.1M
- LOOMIS SAYLES & L PTrimmed · -168,693 sh-$36.9M
- BANK OF AMERICATrimmed · -129,035 sh-$28.2M
- DRIEHAUS CAPITAL MANAGEMENTSold out · -117,963 sh-$25.8M
OSIS 13F holders ranked 1–100 of 388
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 9,627,027 sh | 9,627,027 | $567.6M | <0.01% | +17.0% |
| 2 | FMR#2 · 6,604,166 sh | 6,604,166 | $386.6M | 0.02% | -67.7% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT#3 · 1,272,016 sh | 1,272,016 | $278.2M | 0.01% | +1.8% |
| 4 | Jupiter Topco#4 · 905,925 sh | 905,925 | $198.1M | 0.08% | — |
| 5 | STATE STREET#5 · 10,329,053 sh | 10,329,053 | $160.2M | <0.01% | +30.5% |
| 6 | VANGUARD CAPITAL MANAGEMENT#6 · 703,070 sh | 703,070 | $153.8M | <0.01% | +0.5% |
| 7 | LINDEN ADVISORS#7 · 114,046,000 sh | 114,046,000 | $152.6M | 0.79% | 0.0% |
| 8 | Capital International Investors#8 · 596,331 sh | 596,331 | $130.4M | 0.03% | -3.7% |
| 9 | GEODE CAPITAL MANAGEMENT#9 · 463,787 sh | 463,787 | $101.4M | <0.01% | +5.2% |
| 10 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#10 · 452,547 sh | 452,547 | $99.0M | 0.02% | +5.1% |
| 11 | Channing Capital Management#11 · 432,851 sh | 432,851 | $94.7M | 2.18% | +62.2% |
| 12 | Hood River Capital Management#12 · 414,304 sh | 414,304 | $90.6M | 0.66% | +11.3% |
| 13 | DIMENSIONAL FUND ADVISORS#13 · 414,034 sh | 414,034 | $90.5M | 0.02% | +4.7% |
| 14 | WILLIAM BLAIR INVESTMENT MANAGEMENT#14 · 379,351 sh | 379,351 | $83.0M | 0.25% | +121.0% |
| 15 | Neuberger Berman Group#15 · 324,715 sh | 324,715 | $70.9M | 0.05% | +6.8% |
| 16 | PRICE T ROWE ASSOCIATES#16 · 314,717 sh | 314,717 | $68.8M | <0.01% | +21.3% |
| 17 | MILLENNIUM MANAGEMENT#17 · 298,480 sh | 298,480 | $65.3M | 0.02% | +584.4% |
| 18 | Invesco Ltd.#18 · 2,263,207 sh | 2,263,207 | $60.2M | <0.01% | +64.8% |
| 19 | UBS Group AG#19 · 9,266,866 sh | 9,266,866 | $58.2M | <0.01% | +125.5% |
| 20 | PRIMECAP MANAGEMENT#20 · 258,180 sh | 258,180 | $56.5M | 0.03% | +5.5% |
| 21 | Alberta Investment Management#21 · 40,000,000 sh | 40,000,000 | $52.7M | 0.30% | 0.0% |
| 22 | AMERICAN CENTURY COMPANIES#22 · 223,142 sh | 223,142 | $48.8M | 0.02% | +337.6% |
| 23 | NEUMEIER POMA INVESTMENT COUNSEL#23 · 222,515 sh | 222,515 | $48.7M | 3.33% | +16.2% |
| 24 | Clark Capital Management Group#24 · 218,913 sh | 218,913 | $47.9M | 0.26% | -19.0% |
| 25 | SYSTEMATIC FINANCIAL MANAGEMENT#25 · 216,098 sh | 216,098 | $47.3M | 0.94% | -1.4% |
| 26 | MORGAN STANLEY#26 · 512,990 sh | 512,990 | $43.7M | <0.01% | -2.4% |
| 27 | VAN ECK ASSOCIATES#27 · 199,636 sh | 199,636 | $43.7M | 0.03% | +6.1% |
| 28 | JPMORGAN CHASE#28 · 2,994,751 sh | 2,994,751 | $43.1M | <0.01% | -74.2% |
| 29 | CHARLES SCHWAB INVESTMENT MANAGEMENT#29 · 193,801 sh | 193,801 | $42.4M | <0.01% | -3.6% |
| 30 | MIRAE ASSET GLOBAL ETFS Ltd.#30 · 192,062 sh | 192,062 | $41.9M | 0.05% | -17.4% |
| 31 | AMERIPRISE FINANCIAL#31 · 185,377 sh | 185,377 | $40.5M | <0.01% | +97.0% |
| 32 | NORTHERN#32 · 181,359 sh | 181,359 | $39.7M | <0.01% | +6.1% |
| 33 | WELLINGTON MANAGEMENT GROUP LLP#33 · 177,616 sh | 177,616 | $38.8M | <0.01% | +89.4% |
| 34 | BNP PARIBAS FINANCIAL MARKETS#34 · 13,780,052 sh | 13,780,052 | $35.8M | 0.01% | -40.6% |
| 35 | VOYA INVESTMENT MANAGEMENT#35 · 3,875,194 sh | 3,875,194 | $32.4M | 0.03% | -14.1% |
| 36 | BANK OF AMERICA#36 · 137,340 sh | 137,340 | $30.0M | <0.01% | -48.4% |
| 37 | Clearbridge Investments#37 · 135,261 sh | 135,261 | $29.6M | 0.02% | -17.3% |
| 38 | CITIGROUP#38 · 18,912,825 sh | 18,912,825 | $29.5M | <0.01% | +350.3% |
| 39 | GOLDMAN SACHS GROUP#39 · 119,675 sh | 119,675 | $26.2M | <0.01% | +59.3% |
| 40 | NOMURA ASSET MANAGEMENT INTERNATIONAL#40 · 116,736 sh | 116,736 | $25.5M | 0.04% | -27.7% |
| 41 | Swedbank AB#41 · 116,150 sh | 116,150 | $25.4M | 0.02% | -1.4% |
| 42 | VANGUARD FIDUCIARY#42 · 111,720 sh | 111,720 | $24.4M | <0.01% | +3.8% |
| 43 | NEW YORK STATE COMMON RETIREMENT FUND#43 · 108,672 sh | 108,672 | $23.8M | 0.03% | +52.0% |
| 44 | OBERWEIS ASSET MANAGEMENT#44 · 107,143 sh | 107,143 | $23.4M | 0.48% | +0.5% |
| 45 | PRINCIPAL FINANCIAL GROUP#45 · 105,574 sh | 105,574 | $23.1M | 0.01% | +3.1% |
| 46 | ENVESTNET ASSET MANAGEMENT#46 · 104,535 sh | 104,535 | $22.9M | <0.01% | +4.1% |
| 47 | T. Rowe Price Investment Management#47 · 101,616 sh | 101,616 | $22.2M | 0.01% | New |
| 48 | Bank of New York Mellon#48 · 350,379 sh | 350,379 | $22.2M | <0.01% | -12.0% |
| 49 | BOUSSARD & GAVAUDAN GESTION SAS#49 · 14,700 sh | 14,700 | $19.8M | 0.99% | — |
| 50 | BROWN ADVISORY#50 · 86,852 sh | 86,852 | $19.0M | 0.03% | +11.0% |
| 51 | Boston Partners#51 · 82,102 sh | 82,102 | $17.8M | 0.02% | -5.1% |
| 52 | ABSOLUTE INVESTMENT ADVISERS#52 · 12,008,000 sh | 12,008,000 | $16.0M | — | -0.2% |
| 53 | WELLS FARGO & COMPANY#53 · 1,238,655 sh | 1,238,655 | $14.1M | <0.01% | -0.2% |
| 54 | Asset Management One , Ltd.#54 · 62,754 sh | 62,754 | $13.7M | — | -24.7% |
| 55 | SG Americas Securities#55 · 97,385 sh | 97,385 | $13.6M | <0.01% | +3164.7% |
| 56 | ARISTEIA CAPITAL, L.L.C.#56 · 10,000,000 sh | 10,000,000 | $13.4M | 0.17% | +25.0% |
| 57 | Nuveen#57 · 59,977 sh | 59,977 | $13.1M | <0.01% | +0.2% |
| 58 | Prospect Capital Advisors#58 · 57,640 sh | 57,640 | $12.6M | 5.72% | +16.5% |
| 59 | PUBLIC SECTOR PENSION INVESTMENT BOARD#59 · 53,240 sh | 53,240 | $11.6M | 0.03% | -3.9% |
| 60 | First Eagle Investment Management#60 · 52,162 sh | 52,162 | $11.4M | 0.02% | +111.5% |
| 61 | SEGALL BRYANT & HAMILL#61 · 48,751 sh | 48,751 | $10.7M | 0.13% | New |
| 62 | MIROVA#62 · 46,000 sh | 46,000 | $10.1M | 0.37% | -29.2% |
| 63 | NORDEA INVESTMENT MANAGEMENT AB#63 · 43,518 sh | 43,518 | $9.5M | <0.01% | -4.9% |
| 64 | FIRST ADVISORS#64 · 42,085 sh | 42,085 | $9.2M | <0.01% | +6.2% |
| 65 | KIM#65 · 6,563,000 sh | 6,563,000 | $8.8M | 0.87% | 0.0% |
| 66 | RHUMBLINE ADVISERS#66 · 38,359 sh | 38,359 | $8.4M | <0.01% | -10.9% |
| 67 | Legal & General Group Plc#67 · 37,031 sh | 37,031 | $8.1M | <0.01% | -1.6% |
| 68 | Robeco Schweiz AG#68 · 36,500 sh | 36,500 | $8.0M | — | 0.0% |
| 69 | PDT Partners#69 · 34,904 sh | 34,904 | $7.6M | 0.40% | -17.1% |
| 70 | GHP Investment Advisors#70 · 34,798 sh | 34,798 | $7.6M | — | +4.8% |
| 71 | Bridge City Capital#71 · 33,318 sh | 33,318 | $7.3M | 1.66% | +47.5% |
| 72 | Manatuck Hill Partners#72 · 33,300 sh | 33,300 | $7.3M | 2.41% | +117.6% |
| 73 | Intrinsic Edge Capital Management#73 · 32,959 sh | 32,959 | $7.2M | 0.75% | +26.0% |
| 74 | Swiss National Bank#74 · 31,380 sh | 31,380 | $6.9M | <0.01% | -1.6% |
| 75 | GABELLI FUNDS#75 · 5,025,000 sh | 5,025,000 | $6.6M | 0.04% | +21.1% |
| 76 | STIFEL FINANCIAL#76 · 29,166 sh | 29,166 | $6.4M | <0.01% | +0.7% |
| 77 | HRT FINANCIAL#77 · 28,570 sh | 28,570 | $6.2M | 0.02% | -20.0% |
| 78 | Divisadero Street Capital Management#78 · 27,859 sh | 27,859 | $6.1M | 0.14% | New |
| 79 | MACKAY SHIELDS#79 · 4,485,000 sh | 4,485,000 | $6.0M | — | -0.9% |
| 80 | LORD, ABBETT#80 · 4,457,000 sh | 4,457,000 | $5.9M | 0.02% | -51.8% |
| 81 | Advisors Asset Management#81 · 25,735 sh | 25,735 | $5.6M | 0.09% | +7.8% |
| 82 | ALLIANCEBERNSTEIN L.P.#82 · 20,686 sh | 20,686 | $5.5M | <0.01% | +13.6% |
| 83 | LPL Financial#83 · 23,880 sh | 23,880 | $5.2M | <0.01% | -3.4% |
| 84 | LOOMIS SAYLES & L P#84 · 22,774 sh | 22,774 | $5.0M | <0.01% | -88.1% |
| 85 | XTX Topco Ltd#85 · 22,715 sh | 22,715 | $5.0M | 0.06% | New |
| 86 | Dai-ichi Life Insurance Company, Ltd#86 · 21,398 sh | 21,398 | $4.7M | 0.11% | -37.4% |
| 87 | DEUTSCHE BANK AG\#87 · 21,267 sh | 21,267 | $4.7M | <0.01% | +15.3% |
| 88 | D. E. Shaw#88 · 20,599 sh | 20,599 | $4.5M | <0.01% | +182.8% |
| 89 | SSI INVESTMENT MANAGEMENT#89 · 3,303,000 sh | 3,303,000 | $4.4M | 0.26% | +2.6% |
| 90 | SUSQUEHANNA FUNDAMENTAL INVESTMENTS#90 · 19,422 sh | 19,422 | $4.2M | 0.08% | +707.9% |
| 91 | Stanley-Laman Group, Ltd.#91 · 18,722 sh | 18,722 | $4.1M | — | -0.4% |
| 92 | Weiss Asset Management#92 · 18,580 sh | 18,580 | $4.1M | 0.04% | New |
| 93 | OAK RIDGE INVESTMENTS#93 · 17,600 sh | 17,600 | $3.8M | 0.22% | +29.8% |
| 94 | AQR CAPITAL MANAGEMENT#94 · 17,540 sh | 17,540 | $3.8M | <0.01% | -8.2% |
| 95 | MML INVESTORS SERVICES#95 · 16,729 sh | 16,729 | $3.7M | <0.01% | -39.6% |
| 96 | CHATHAM CAPITAL GROUP#96 · 16,405 sh | 16,405 | $3.6M | — | +4.5% |
| 97 | MOODY ALDRICH PARTNERS#97 · 16,368 sh | 16,368 | $3.6M | 0.64% | -10.2% |
| 98 | PRUDENTIAL FINANCIAL#98 · 16,064 sh | 16,064 | $3.5M | <0.01% | +1.2% |
| 99 | Hilton Capital Management#99 · 15,476 sh | 15,476 | $3.4M | 0.23% | New |
| 100 | Moran Wealth Management#100 · 15,352 sh | 15,352 | $3.4M | — | +4.6% |
Funds that sold out of OSIS in Q2 2026 (59)
Held OSIS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.