OSI SYSTEMS INC

PublicCIK: 1039065
OSISNASDAQ
Location

HAWTHORNE, CA

13F Filings

Institutional Holders

OSI SYSTEMS INCOSIS— Latest position per institution from SEC 13F filings

15

Institutional holders

21.83M

Total shares held

3.81B

Estimated value

1.09M

Avg. position size

1

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

CIK 1081019

Shares

3.97M

Value

18.14K

Filed

Jun 30, 2026

2

BLACKROCK FINANCE, INC.

CIK 1364742

Shares

2.61M

Value

358.80M

Filed

Jun 30, 2024

3

BLACKROCK, INC.

CIK 2012383

Shares

2.55M

Value

558.13M

Filed

Jun 30, 2026

4

VANGUARD GROUP INC

CIK 102909

Shares

2.11M

Value

537.31M

Filed

Dec 31, 2025

5

FMR LLC

CIK 315066

Shares

1.74M

Value

380.14M

Filed

Jun 30, 2026

6

VANGUARD PORTFOLIO MANAGEMENT LLC

CIK 2100121

Shares

1.27M

Value

278.19M

Filed

Jun 30, 2026

7

JUPITER TOPCO LLC

CIK 2146052

Shares

905.92K

Value

198.13M

Filed

Jun 30, 2026

8

JANUS HENDERSON GROUP LTD.

CIK 1274173

Shares

772.31K

Value

205.06M

Filed

Mar 31, 2026

9

VANGUARD CAPITAL MANAGEMENT LLC

CIK 2100119

Shares

703.07K

Value

153.76M

Filed

Jun 30, 2026

10

STATE STREET CORP

CIK 93751

Shares

674.05K

Value

147.42M

Filed

Jun 30, 2026

11

MAWER INVESTMENT MANAGEMENT LTD.

CIK 1538449

Shares

662.63K

Value

175.94M

Filed

Mar 31, 2026

12

CAPITAL INTERNATIONAL INVESTORS

CIK 1562230

Shares

596.33K

Value

130.42M

Filed

Jun 30, 2026

13

GEODE CAPITAL MANAGEMENT, LLC

CIK 1214717

Shares

463.79K

Value

101.45M

Filed

Jun 30, 2026

14

UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC

CIK 861177

Shares

452.55K

Value

98.97M

Filed

Jun 30, 2026

15

CHANNING CAPITAL MANAGEMENT, LLC

CIK 1302404

Shares

432.85K

Value

94.66M

Filed

Jun 30, 2026

16

HOOD RIVER CAPITAL MANAGEMENT LLC

CIK 1578177

Shares

414.30K

Value

90.61M

Filed

Jun 30, 2026

17

DIMENSIONAL FUND ADVISORS LP

CIK 354204

Shares

414.03K

Value

90.54M

Filed

Jun 30, 2026

18

CREDIT SUISSE AG/

CIK 824468

Shares

385.34K

Value

55.03M

Filed

Mar 31, 2024

19

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

CIK 1644956

Shares

379.35K

Value

82.96M

Filed

Jun 30, 2026

20

NEUBERGER BERMAN GROUP LLC

CIK 1465109

Shares

324.71K

Value

70.86M

Filed

Jun 30, 2026

Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.