Latest Period
Q1 2026
Security Snapshot
OSI SYSTEMS INC - Common Stock (OSIS) Institutional Ownership
CUSIP: 671044105
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
367
Shares (Excl. Options)
18,852,172
Price
$265.51
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- Security type / class
- Equity / Common Stock
- Symbol
- OSIS on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 18,852,172
- Total 13F value
- $5,002,497,235
- Portfolio coverage rank
- 0%
- Share change
- +11,855
- Value change
- +$4,214,108
- Number of holders
- 367
- Shares outstanding
- 16,432,213
- SEC-reported price per share
- $218.70
- Insider filing price
- $218.70
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- OSIS - OSI SYSTEMS INC - Common Stock is tracked under CUSIP 671044105.
- 367 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 367 to 33 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $5,002,497,235 to $51,289,978.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 367 institutions filings for Q1 2026.
Security key
671044105
Latest holder period
Q1 2026
13F holders
367
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
OSIS full holder history
OSI SYSTEMS INC SEC filings
OSI SYSTEMS INC company facts
OSI SYSTEMS INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 671044105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
OSIS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 14% | $537,376,724 | 2,389,828 | BlackRock, Inc. | 30 Jun 2025 | |||
| FMR LLC | 13% | +26% | $620,009,194 | +$113,195,787 | 2,084,415 | +22% | FMR LLC | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.7% | $335,450,910 | 1,263,421 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| Mawer Investment Management Ltd. | 4.7% | -7.2% | $205,384,599 | -$13,489,768 | 803,602 | -6.2% | Mawer Investment Management Ltd. | 31 Dec 2025 |
| JANUS HENDERSON GROUP PLC | 4.7% | -20% | $229,724,799 | -$67,811,759 | 772,314 | -23% | JANUS HENDERSON GROUP PLC | 31 Mar 2026 |
As of 31 Mar 2026, 367 institutional investors reported holding 18,852,172 shares of OSI SYSTEMS INC - Common Stock (OSIS). This represents 115% of the company’s total 16,432,213 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
85%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15% | 2,529,623 | -1.3% | 0.01% | $671,640,204 |
| FMR LLC | 12% | 1,967,088 | +19% | 0.03% | $522,281,462 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.6% | 1,249,748 | 0% | 0.02% | $331,820,591 |
| JANUS HENDERSON GROUP PLC | 4.7% | 772,314 | +2.6% | 0.1% | $205,056,005 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.3% | 699,253 | 0% | 0% | $185,658,664 |
| Mawer Investment Management Ltd. | 4% | 662,634 | -18% | 1.1% | $175,935,953 |
| STATE STREET CORP | 4% | 662,141 | +0.6% | 0.01% | $175,805,057 |
| Capital International Investors | 3.8% | 619,479 | -8.1% | 0.04% | $164,477,869 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7% | 440,723 | +7.2% | 0.01% | $117,034,888 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 2.6% | 430,561 | -14% | 0.02% | $114,318,251 |
| DIMENSIONAL FUND ADVISORS LP | 2.4% | 395,428 | -2.8% | 0.02% | $104,992,115 |
| Invesco Ltd. | 2.3% | 373,274 | -12% | 0.01% | $99,107,978 |
| Hood River Capital Management LLC | 2.3% | 372,074 | -1.9% | 0.99% | $98,789,368 |
| NEUBERGER BERMAN GROUP LLC | 1.8% | 303,923 | +1% | 0.06% | $80,683,616 |
| Clark Capital Management Group, Inc. | 1.6% | 270,420 | +1.6% | 0.44% | $71,799,215 |
| Channing Capital Management, LLC | 1.6% | 266,884 | 1.8% | $70,860,371 | |
| BANK OF AMERICA CORP /DE/ | 1.6% | 266,375 | -6.9% | 0.01% | $70,725,226 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.6% | 259,545 | +1.8% | 0.01% | $68,913,000 |
| PRIMECAP MANAGEMENT CO/CA/ | 1.5% | 244,660 | -8.6% | 0.05% | $64,959,677 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.4% | 232,497 | +43% | 0.08% | $61,598,225 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | 1.3% | 219,241 | -6% | 1.3% | $58,211,119 |
| MORGAN STANLEY | 1.3% | 210,377 | -5.6% | 0% | $55,857,567 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2% | 200,986 | -0.52% | 0.01% | $53,363,793 |
| LOOMIS SAYLES & CO L P | 1.2% | 191,467 | -7.7% | 0.07% | $50,836,404 |
| NEUMEIER POMA INVESTMENT COUNSEL LLC | 1.2% | 191,430 | -2.2% | 4.2% | $50,826,579 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q1 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 234,630 | $51,289,978 | -$6,602,383 | $218.70 | 33 |
| 2026 Q1 | 18,852,172 | $5,002,497,235 | +$4,214,108 | $265.51 | 367 |
| 2025 Q4 | 18,809,721 | $4,799,479,840 | +$13,254,807 | $255.06 | 358 |
| 2025 Q3 | 18,695,472 | $4,658,561,250 | +$10,949,794 | $249.24 | 345 |
| 2025 Q2 | 18,689,354 | $4,200,189,299 | -$159,319,080 | $224.86 | 337 |
| 2025 Q1 | 19,470,051 | $3,781,680,121 | +$272,650,652 | $194.34 | 306 |
| 2024 Q4 | 18,050,418 | $3,021,926,083 | +$271,642,509 | $167.43 | 300 |
| 2024 Q3 | 16,442,167 | $2,494,751,950 | +$153,277,128 | $151.83 | 271 |
| 2024 Q2 | 15,388,625 | $2,116,646,888 | +$78,778,036 | $137.52 | 264 |
| 2024 Q1 | 15,161,521 | $2,164,902,587 | -$3,031,012 | $142.82 | 247 |
| 2023 Q4 | 15,196,031 | $1,961,204,420 | +$30,223,863 | $129.05 | 225 |
| 2023 Q3 | 14,995,454 | $1,769,645,354 | -$8,152,605 | $118.04 | 234 |
| 2023 Q2 | 15,053,317 | $1,773,537,607 | +$5,185,476 | $117.83 | 207 |
| 2023 Q1 | 15,018,948 | $1,537,929,075 | -$22,653,459 | $102.36 | 179 |
| 2022 Q4 | 15,307,854 | $1,218,259,274 | +$12,488,077 | $79.52 | 186 |
| 2022 Q3 | 15,180,060 | $1,094,118,619 | -$32,043,942 | $72.06 | 178 |
| 2022 Q2 | 15,555,990 | $1,329,118,252 | -$28,934,397 | $85.44 | 179 |
| 2022 Q1 | 15,992,182 | $1,361,219,330 | -$55,039,518 | $85.12 | 180 |
| 2021 Q4 | 16,606,910 | $1,547,299,064 | -$45,448,996 | $93.20 | 186 |
| 2021 Q3 | 16,993,040 | $1,610,685,639 | -$28,683,627 | $94.80 | 185 |
| 2021 Q2 | 17,297,443 | $1,757,698,619 | +$26,327,154 | $101.64 | 184 |
| 2021 Q1 | 17,057,537 | $1,639,241,231 | +$5,209,680 | $96.10 | 191 |
| 2020 Q4 | 16,994,249 | $1,584,140,398 | +$14,674,825 | $93.22 | 183 |
| 2020 Q3 | 16,926,937 | $1,313,266,781 | -$17,757,416 | $77.61 | 179 |
| 2020 Q2 | 17,148,117 | $1,279,335,922 | -$28,715,492 | $74.64 | 182 |