Security Snapshot

OSI SYSTEMS INC - Common Stock (OSIS) Institutional Ownership

CUSIP: 671044105

13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026

13F reference period

Q2 2026

Institutions Reporting

362

Shares (Excl. Options)

18.92MFull value: 18,922,915 · shares · 30 Jun 2026

Price

$218.70

The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.

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Security type / class
Equity / Common Stock
Symbol
OSIS on Nasdaq
All holders as of 30 Jun 2026
Q2 2026
Total 13F shares
18,922,915
Latest holder snapshot 5 signals
Total 13F value
$4,138,051,490
Portfolio coverage rank
0%
Share change
-32,428
Value change
-$56,625,922
Number of holders
362
Issuer context Names, identifiers, and filing context for this profile. 3 identity fields
Shares outstanding
15,983,961
SEC-reported price per share
$194.70
Insider filing price
$194.70
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source

Key facts

  • OSIS - OSI SYSTEMS INC - Common Stock is tracked under CUSIP 671044105.
  • 362 institutions reported positions in Q2 2026.
  • 6 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 367 to 362 between Q1 2026 and Q2 2026.
  • SEC-reported value moved from
    $5BFull value: $5,002,497,235 · USD · 31 Mar 2026
    to
    $4.14BFull value: $4,138,051,490 · USD · 30 Jun 2026
    .

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

Latest holder context comes from 362 institutions filings for Q2 2026.

Open SEC evidence

Security key

671044105

13F reference period

Q2 2026

13F holders

362

13D/G owners

6

CIK / CUSIP context first

Open Q2 2026 holders OSIS full holder history OSI SYSTEMS INC SEC filings OSI SYSTEMS INC company facts OSI SYSTEMS INC insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
6
Security
OSIS
Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 15% +7.1% $472,233,966 +$7,723,098 2,429,562 +1.7% BlackRock, Inc. 30 Sep 2026
FMR LLC 11% -14% $387,924,328 -$65,269,049 1,784,216 -14% FMR LLC 30 Jun 2026
VANGUARD PORTFOLIO MANAGEMENT LLC 7.7% $335,450,910 1,263,421 Vanguard Portfolio Management 31 Mar 2026
Janus Henderson Group Ltd. 5.5% +16% $196,966,214 +$29,049,704 905,925 +17% JANUS HENDERSON GROUP Ltd. 30 Jun 2026
VANGUARD CAPITAL MANAGEMENT LLC 5% $179,264,964 824,510 Vanguard Capital Management 30 Jun 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
As of 30 Jun 2026, 362 institutional investors reported holding
18.92MFull value: 18,922,915 · shares · 30 Jun 2026
shares of OSI SYSTEMS INC - Common Stock (OSIS). This represents 118% of the company’s total
15.98MFull value: 15,983,961 · shares · Stored outstanding share count
outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
87%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 16% 2,552,027 +0.89% 0.01% $558,128,306
FMR LLC 11% 1,738,166 -12% 0.02% $380,136,930
VANGUARD PORTFOLIO MANAGEMENT LLC 8% 1,272,016 +1.8% 0.01% $278,189,899
Jupiter Topco LLC 5.7% 905,925 0% 0.08% $198,127,058
VANGUARD CAPITAL MANAGEMENT LLC 4.4% 703,070 +0.55% 0% $153,761,409
STATE STREET CORP 4.2% 674,053 +1.8% 0% $147,415,391
Capital International Investors 3.7% 596,331 -3.7% 0.03% $130,417,590
GEODE CAPITAL MANAGEMENT, LLC 2.9% 463,787 +5.2% 0.01% $101,445,558
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 2.8% 452,547 +5.1% 0.02% $98,972,029
Channing Capital Management, LLC 2.7% 432,851 +62% 2.2% $94,664,514
Hood River Capital Management LLC 2.6% 414,304 +11% 0.66% $90,608,285
DIMENSIONAL FUND ADVISORS LP 2.6% 414,034 +4.7% 0.02% $90,543,618
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 2.4% 379,351 +121% 0.25% $82,964,064
NEUBERGER BERMAN GROUP LLC 2% 324,715 +6.8% 0.05% $70,857,097
PRICE T ROWE ASSOCIATES INC /MD/ 2% 314,717 +21% 0.01% $68,829,000
MILLENNIUM MANAGEMENT LLC 1.9% 298,480 +584% 0.04% $65,277,576
Invesco Ltd. 1.6% 263,207 -29% 0% $57,563,371
PRIMECAP MANAGEMENT CO/CA/ 1.6% 258,180 +5.5% 0.03% $56,463,966
AMERICAN CENTURY COMPANIES INC 1.4% 223,142 +338% 0.02% $48,801,670
NEUMEIER POMA INVESTMENT COUNSEL LLC 1.4% 222,515 +16% 3.3% $48,664,031
Clark Capital Management Group, Inc. 1.4% 218,913 -19% 0.26% $47,876,273
SYSTEMATIC FINANCIAL MANAGEMENT LP 1.4% 216,098 -1.4% 0.94% $47,260,905
UBS Group AG 1.3% 210,866 +55% 0.01% $46,116,394
VAN ECK ASSOCIATES CORP 1.2% 199,636 +6.1% 0.03% $43,660,393
MORGAN STANLEY 1.2% 197,990 -5.9% 0% $43,300,681

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
51
Headline period
Q2 2026
Rows shown
1-25 of 51
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q3 948,108 $184,271,812 -$7,014,030 $194.37 88
2026 Q2 18,922,915 $4,138,051,490 -$56,625,922 $218.70 362
2026 Q1 18,852,172 $5,002,497,235 +$4,205,435 $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
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