OSI SYSTEMS INC OSIS
CIK 0001039065 · CUSIP 671044105
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $497.38M 2,559,330 shares | 0.01% | -123.31K(-4.60%)Reduced | SEC filing ↗ May 2, 2025 | ▾ |
| 02 | VANGUARD GROUP INC CIK 102909 · View history | $410.65M 2,113,028 shares | 0.01% | -7.09K(-0.30%)Reduced | SEC filing ↗ May 9, 2025 | ▾ |
| 03 | JANUS HENDERSON GROUP PLC CIK 1274173 · View history | $238.74M 1,234,959 shares | 0.13% | +4.15K(+0.30%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 04 | FMR LLC CIK 315066 · Amended · View history | $232.28M 1,195,207 shares | 0.01% | +347.30K(+41.00%)Added | SEC filing ↗ Nov 5, 2026 | ▾ |
| 05 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC CIK 861177 · View history | $170.51M 877,393 shares | 0.04% | +541.88K(+161.50%)Added | SEC filing ↗ May 19, 2025 | ▾ |
| 06 | STATE STREET CORP CIK 93751 · View history | $141.22M 726,651 shares | 0.01% | -22.22K(-3.00%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 07 | Capital International Investors CIK 1562230 · View history | $131.05M 674,343 shares | 0.03% | +93.45K(+16.10%)Added | SEC filing ↗ May 12, 2025 | ▾ |
| 08 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $114.81M 590,774 shares | 0.03% | -159.40K(-21.20%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 09 | Mawer Investment Management Ltd. CIK 1538449 · View history | $89.60M 461,022 shares | 0.43% | +83.72K(+22.20%)Added | SEC filing ↗ May 7, 2025 | ▾ |
| 10 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $73.61M 378,709 shares | 0.01% | +4.20K(+1.10%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 11 | Hood River Capital Management LLC CIK 1578177 · View history | $72.52M 373,158 shares | 1.24% | +47.48K(+14.60%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 12 | Clark Capital Management Group, Inc. CIK 1352187 · View history | $71.80M 369,473 shares | 0.51% | +6.76K(+1.90%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 13 | PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history | $64.97M 334,330 shares | 0.05% | +36.62K(+12.30%)Added | SEC filing ↗ May 9, 2025 | ▾ |
| 14 | NEUBERGER BERMAN GROUP LLC CIK 1465109 · Amended · View history | $64.18M 330,014 shares | 0.05% | -2.89K(-0.90%)Reduced | SEC filing ↗ Oct 27, 2026 | ▾ |
| 15 | Clearbridge Investments, LLC CIK 1348883 · View history | $58.31M 300,039 shares | 0.05% | -48.78K(-14.00%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 16 | BANK OF AMERICA CORP /DE/ CIK 70858 · View history | $57.67M 296,737 shares | 0.01% | +202.63K(+215.30%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 17 | BROWN ADVISORY INC CIK 1345929 · View history | $54.18M 278,790 shares | 0.08% | +6.33K(+2.30%)Added | SEC filing ↗ Apr 30, 2025 | ▾ |
| 18 | SYSTEMATIC FINANCIAL MANAGEMENT LP CIK 1085936 · View history | $51.31M 264,001 shares | 1.46% | -12.16K(-4.40%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 19 | UBS Group AG CIK 1610520 · View history | $48.15M 247,746 shares | 0.01% | -59.85K(-19.50%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 20 | Invesco Ltd. CIK 914208 · View history | $47.86M 246,254 shares | 0.01% | +69.54K(+39.30%)Added | SEC filing ↗ May 12, 2025 | ▾ |
Showing 20 / 313 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 313 reporting institutions.
This page includes 20 of 313 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
＋ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 313 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"671044105","quarter":"2025Q1","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.