OSIS · Osi Systems Inc · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding OSIS
All superinvestors →Holder Concentration
Across 371 13F filersWho Holds OSIS
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 366 filers, like-for-like change +0.4%; actively managed books -0.5%; index-like books +2.3%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 42.2% | 184 | -1.9% |
| Exempt adviser | 0.0% | 3 | -37.3% |
| Adviser | 6.7% | 11 | +0.8% |
| Bank | 8.6% | 19 | -0.5% |
| Insurer | 0.6% | 3 | +3.9% |
| Broker-dealer | 0.1% | 2 | +9.6% |
| Registered fund | 0.0% | 1 | -39.8% |
| Benefit plan | 0.2% | 5 | -5.1% |
| Non-US | 1.3% | 13 | -12.5% |
| Holding company | 27.1% | 10 | -1.2% |
| Unknown | 13.1% | 115 | +15.1% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 32.8% | 41 | +2.3% |
| Systematic-like | 2.4% | 26 | +310.5% |
| Concentrated | 0.1% | 46 | -69.5% |
| Diversified active | 64.7% | 253 | -2.8% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 60.6% | 211 | -3.1% |
| Medium turnover | 19.6% | 88 | +1.2% |
| High turnover | 3.0% | 40 | +108.4% |
| Unknown | 16.7% | 27 | +3.4% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 17.1% | 42 | +5.2% |
| Medium horizon | 16.0% | 57 | +3.8% |
| Long horizon | 60.4% | 241 | -1.3% |
| Unknown | 6.5% | 26 | -3.1% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 1.4% | 80 | -0.2% |
| $1B to $10B | 8.4% | 111 | +16.2% |
| $10B to $100B | 11.3% | 98 | -29.6% |
| $100B or more | 78.8% | 77 | +5.4% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 2.8% | 95 | -16.0% |
| Pooled investment vehicles | 2.9% | 23 | +71.4% |
| Registered funds and BDCs | 24.2% | 23 | +3.8% |
| Pension and profit sharing plans | 0.0% | 3 | -0.4% |
| Insurance companies | 0.7% | 3 | +618.0% |
| Charitable organizations | 0.0% | 1 | new |
| Governments and sovereign funds | 3.1% | 7 | +37.8% |
| Other investment advisers | 0.1% | 8 | +31.8% |
| Other | 0.1% | 2 | -0.6% |
| Diversified | 8.3% | 19 | -31.6% |
| Unknown | 57.8% | 182 | +2.2% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 4.7% | 38 | +14.6% |
| Private equity funds | 2.4% | 12 | +7.1% |
| Venture capital funds | 0.0% | 1 | -5.3% |
| Real estate funds | 0.0% | 5 | -2.2% |
| Securitized asset funds | 2.4% | 1 | +5.1% |
| Other private funds | 8.9% | 20 | -26.1% |
| Mixed private funds | 0.1% | 1 | +13.6% |
| Private funds, type not stated | 1.1% | 5 | +9.6% |
| No private funds | 22.5% | 104 | +6.3% |
| Unknown | 57.8% | 179 | +2.2% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 94.3% | 308 | +4.7% |
| Outside the US | 5.7% | 58 | -39.9% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 4 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
366 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 24.2% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies OSIS's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not OSIS, quarter ended Jun 30, 2026Found through its holder-overlap peers: PLUS, FSS, OPLN, NHC, SGHC, CXT, RSI, MGRC, UFPT, DIOD, GVA, ESI, DAVE, WLDN, ETON, KLIC, BHE, WTTR, AIR, UTI. 1,108 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | CONGRESS ASSET MANAGEMENT CO Registered adviser, Diversified active | $581,005,080 5 held | UFPT, UTI, KLIC |
| 2 | FULLER & THALER ASSET MANAGEMENT, INC. Registered adviser, Diversified active | $563,424,431 7 held | GVA, AIR, KLIC |
| 3 | Capital World Investors Adviser, Diversified active | $508,136,095 3 held | FSS, ESI, MGRC |
| 4 | WASATCH ADVISORS LP Registered adviser, Diversified active | $508,027,551 7 held | UFPT, FSS, GVA |
| 5 | Driehaus Capital Management LLC Registered adviser, Diversified active | $482,034,512 6 held | RSI, DAVE, UTI |
| 6 | EARNEST PARTNERS LLC Registered adviser, Diversified active | $446,854,169 4 held | AIR, BHE, DIOD |
| 7 | Point72 Asset Management, L.P. Registered adviser, Systematic-like | $418,810,648 11 held | KLIC, ESI, UTI |
| 8 | SILVERCREST ASSET MANAGEMENT GROUP LLC Registered adviser, Diversified active | $398,266,522 8 held | ESI, MGRC, FSS |
| 9 | River Road Asset Management, LLC Registered adviser, Diversified active | $379,351,313 2 held | MGRC, PLUS |
| 10 | RENAISSANCE TECHNOLOGIES LLC Registered adviser, Diversified active | $307,585,538 10 held | DAVE, NHC, RSI |
Fund Ownership of OSIS by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 33.26% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 5.11% | 815,286 |
| Index ETFs | 28.14% | 4,486,287 |
| Active ETFs | 1.41% | 224,565 |
| Active funds | 30.74% | 4,900,982 |
| Unclassified | 0.77% | 123,274 |
| All registered funds | 66.18% | 10,550,394 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $558,128,297 | 13.40% | 2,552,027 | Shares | 2026-08-07 | |
| Mega FMR LLC Holding company | $380,136,902 | 9.13% | 1,738,166 | Shares | 2026-08-13 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $278,189,899 | 6.68% | 1,272,016 | Shares | 2026-08-13 | |
| Mega Jupiter Topco LLC | $198,125,796 | 4.76% | 905,925 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $153,761,409 | 3.69% | 703,070 | Shares | 2026-08-13 | |
| Mega STATE STREET CORP Bank | $147,415,391 | 3.54% | 674,053 | Shares | 2026-09-22 | |
| Mega Capital International Investors Adviser | $130,417,589 | 3.13% | 596,331 | Shares | 2026-08-12 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $101,430,216 | 2.44% | 463,787 | Shares | 2026-08-12 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $98,972,024 | 2.38% | 452,547 | Shares | 2026-08-13 | |
| Mid Channing Capital Management, LLC Registered adviser | $94,664,513 | 2.27% | 432,851 | Shares | 2026-07-29 | |
| Large Hood River Capital Management LLC Registered adviser | $90,608,284 | 2.18% | 414,304 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $90,549,234 | 2.17% | 414,034 | Shares | 2026-08-11 | |
| Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Registered adviser | $82,964,063 | 1.99% | 379,351 | Shares | 2026-08-12 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $71,015,170 | 1.71% | 324,715 | Shares | 2026-08-13 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $68,828,607 | 1.65% | 314,717 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $65,277,576 | 1.57% | 298,480 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $57,563,368 | 1.38% | 263,207 | Shares | 2026-08-14 | |
| Mega PRIMECAP MANAGEMENT CO/CA/ Registered adviser | $56,463,966 | 1.36% | 258,180 | Shares | 2026-08-14 | |
| Mega AMERICAN CENTURY COMPANIES INC | $48,801,155 | 1.17% | 223,142 | Shares | 2026-08-12 | |
| Mid NEUMEIER POMA INVESTMENT COUNSEL LLC Registered adviser | $48,664,030 | 1.17% | 222,515 | Shares | 2026-08-13 | |
| Large Clark Capital Management Group, Inc. Registered adviser | $47,876,273 | 1.15% | 218,913 | Shares | 2026-08-11 | |
| Mid SYSTEMATIC FINANCIAL MANAGEMENT LP Registered adviser | $47,260,632 | 1.13% | 216,098 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $46,116,392 | 1.11% | 210,866 | Shares | 2026-08-13 | |
| Mega VAN ECK ASSOCIATES CORP Registered adviser | $43,660,393 | 1.05% | 199,636 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $43,300,410 | 1.04% | 197,990 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $42,384,278 | 1.02% | 193,801 | Shares | 2026-08-14 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $42,003,959 | 1.01% | 192,062 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $41,498,540 | 1.00% | 189,751 | Shares | 2026-08-12 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $40,541,948 | 0.97% | 185,377 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $39,663,211 | 0.95% | 181,359 | Shares | 2026-08-13 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $38,844,618 | 0.93% | 177,616 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $30,036,255 | 0.72% | 137,340 | Shares | 2026-08-14 | |
| Mega Clearbridge Investments, LLC Registered adviser | $29,581,580 | 0.71% | 135,261 | Shares | 2026-08-13 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $27,379,927 | 0.66% | 125,194 | Shares | 2026-08-12 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $26,172,921 | 0.63% | 119,675 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Adviser | $25,530,163 | 0.61% | 116,736 | Shares | 2026-08-14 | |
| Mega Swedbank AB | $25,402,005 | 0.61% | 116,150 | Shares | 2026-07-15 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $24,433,164 | 0.59% | 111,720 | Shares | 2026-08-13 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $23,766,566 | 0.57% | 108,672 | Shares | 2026-07-29 | |
| Mid OBERWEIS ASSET MANAGEMENT INC/ Registered adviser | $23,432,174 | 0.56% | 107,143 | Shares | 2026-08-14 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $23,089,032 | 0.55% | 105,574 | Shares | 2026-08-04 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $22,861,804 | 0.55% | 104,535 | Shares | 2026-09-23 | |
| Mega T. Rowe Price Investment Management, Inc. Adviser | $22,223,419 | 0.53% | 101,616 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $21,952,883 | 0.53% | 100,379 | Shares | 2026-08-06 | |
| Large BROWN ADVISORY INC | $18,994,531 | 0.46% | 86,852 | Shares | 2026-08-14 | |
| Mega Boston Partners Registered adviser | $17,955,706 | 0.43% | 82,102 | Shares | 2026-08-04 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $17,507,372 | 0.42% | 80,052 | Shares | 2026-08-13 | |
| Large Asset Management One Co., Ltd. Registered adviser | $13,724,299 | 0.33% | 62,754 | Shares | 2026-07-28 | |
| Mega Nuveen, LLC | $13,116,969 | 0.31% | 59,977 | Shares | 2026-08-11 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $13,046,545 | 0.31% | 59,655 | Shares | 2026-08-14 | |
| Small Prospect Capital Advisors, LLC Registered adviser | $12,605,868 | 0.30% | 57,640 | Shares | 2026-08-14 | |
| Large Public Sector Pension Investment Board Non-US | $11,643,588 | 0.28% | 53,240 | Shares | 2026-08-13 | |
| Large First Eagle Investment Management, LLC Registered adviser | $11,407,829 | 0.27% | 52,162 | Shares | 2026-08-24 | |
| Mid SEGALL BRYANT & HAMILL, LLC Registered adviser | $10,661,843 | 0.26% | 48,751 | Shares | 2026-08-12 | |
| Mid MIROVA | $10,060,200 | 0.24% | 46,000 | Shares | 2026-08-13 | |
| Mega NORDEA INVESTMENT MANAGEMENT AB Non-US | $9,517,386 | 0.23% | 43,518 | Shares | 2026-08-05 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $9,203,989 | 0.22% | 42,085 | Shares | 2026-08-11 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9,163,530 | 0.22% | 41,900 | Call | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $8,389,113 | 0.20% | 38,359 | Shares | 2026-08-12 | |
| Mega Legal & General Group Plc | $8,098,679 | 0.19% | 37,031 | Shares | 2026-08-14 | |
| Mid Robeco Schweiz AG | $7,982,550 | 0.19% | 36,500 | Shares | 2026-07-28 | |
| Mid PDT Partners, LLC Registered adviser | $7,633,504 | 0.18% | 34,904 | Shares | 2026-08-14 | |
| Small Bridge City Capital, LLC Registered adviser | $7,286,646 | 0.17% | 33,318 | Shares | 2026-08-11 | |
| Small Manatuck Hill Partners, LLC Registered adviser | $7,282,710 | 0.17% | 33,300 | Shares | 2026-08-14 | |
| Small INTRINSIC EDGE CAPITAL MANAGEMENT LLC Registered adviser | $7,208,133 | 0.17% | 32,959 | Shares | 2026-08-12 | |
| Mega Swiss National Bank | $6,862,806 | 0.16% | 31,380 | Shares | 2026-08-11 | |
| Mid GHP Investment Advisors, Inc. Registered adviser | $6,778,070 | 0.16% | 34,872 | Shares | 2026-10-15 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $6,626,610 | 0.16% | 30,300 | Put | 2026-08-14 | |
| Mega STIFEL FINANCIAL CORP | $6,378,603 | 0.15% | 29,166 | Shares | 2026-08-12 | |
| Large HRT FINANCIAL LP | $6,248,259 | 0.15% | 28,570 | Shares | 2026-08-14 | |
| Mid Divisadero Street Capital Management, LP Registered adviser | $6,092,763 | 0.15% | 27,859 | Shares | 2026-08-14 | |
| Mid Advisors Asset Management, Inc. Registered adviser | $5,628,244 | 0.14% | 25,735 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC Broker-dealer | $5,222,556 | 0.13% | 23,880 | Shares | 2026-08-07 | |
| Large LOOMIS SAYLES & CO L P Registered adviser | $4,980,673 | 0.12% | 22,774 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $4,967,770 | 0.12% | 22,715 | Shares | 2026-08-14 | |
| Mid Dai-ichi Life Insurance Company, Ltd | $4,679,742 | 0.11% | 21,398 | Shares | 2026-08-12 | |
| Mega DEUTSCHE BANK AG\ Non-US | $4,651,092 | 0.11% | 21,267 | Shares | 2026-08-07 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $4,524,028 | 0.11% | 20,686 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $4,505,001 | 0.11% | 20,599 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $4,483,350 | 0.11% | 20,500 | Put | 2026-09-02 | |
| Mega CITIGROUP INC Bank | $4,335,727 | 0.10% | 19,825 | Shares | 2026-08-03 | |
| Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $4,247,591 | 0.10% | 19,422 | Shares | 2026-08-14 | |
| Mid Weiss Asset Management LP Registered adviser | $4,063,446 | 0.10% | 18,580 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $3,968,092 | 0.10% | 18,144 | Shares | 2026-08-24 | |
| Mid OAK RIDGE INVESTMENTS LLC Registered adviser | $3,849,120 | 0.09% | 17,600 | Shares | 2026-07-21 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $3,835,996 | 0.09% | 17,540 | Shares | 2026-08-14 | |
| Large MML INVESTORS SERVICES, LLC | $3,658,632 | 0.09% | 16,729 | Shares | 2026-08-07 | |
| Small Moody Aldrich Partners LLC Registered adviser | $3,579,681 | 0.09% | 16,368 | Shares | 2026-07-15 | |
| Small Stanley-Laman Group, Ltd. | $3,572,909 | 0.09% | 18,382 | Shares | 2026-10-20 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $3,513,196 | 0.08% | 16,064 | Shares | 2026-08-12 | |
| Mega JANE STREET GROUP, LLC | $3,455,460 | 0.08% | 15,800 | Put | 2026-08-14 | |
| Small CHATHAM CAPITAL GROUP, INC. Registered adviser | $3,399,531 | 0.08% | 17,490 | Shares | 2026-10-16 | |
| Mid Hilton Capital Management, LLC Registered adviser | $3,384,601 | 0.08% | 15,476 | Shares | 2026-08-04 | |
| Mid Moran Wealth Management, LLC Registered adviser | $3,357,481 | 0.08% | 15,352 | Shares | 2026-08-05 | |
| Mid SIG BROKERAGE, LP | $3,280,500 | 0.08% | 15,000 | Call | 2026-08-14 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $3,226,262 | 0.08% | 14,752 | Shares | 2026-08-13 | |
| Mid WEDGE CAPITAL MANAGEMENT L L P/NC | $3,052,386 | 0.07% | 15,704 | Shares | 2026-10-13 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $2,996,627 | 0.07% | 13,702 | Shares | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $2,869,340 | 0.07% | 13,120 | Shares | 2026-08-14 | |
| Large Trexquant Investment LP Registered adviser | $2,854,909 | 0.07% | 13,054 | Shares | 2026-08-14 |
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