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OSI Systems OSIS

US equityMarket cap rank #2445Electronic Components
$197.87 +$1.09 (+0.55%)
Market closed · Oct 6, 5:20 am ET · Last extended-hours $197.87 0.00%
Open$197.73
Prev close$196.78
Day range$194.24 – $199.53
Volume198.9K
Market cap$3.15B
P/E (TTM)22.1
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership121.5%-0.21 pts vs. prior quarter
Institutions holding442-3 vs. prior quarter
Insider trades (recent)28 buys / 22 sellsNet buying
Short interest13.31% of floatDays to cover 8.2 · as of 15 Sep 2026
Short-sale volume share15.8%5-day average of daily volume

Short-sale volume as % of daily volume

9%14%20%26%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$2.93M (6 inflow days, 14 outflow days).

The five largest holders on file together own 45.7% of shares outstanding.

Largest holders

  • BlackRock16.01%
  • FMR10.89%
  • Vanguard Portfolio Management, LLC7.98%
  • Janus Henderson Group plc5.68%
  • Vanguard Capital Management, LLC5.11%
  • State Street Global Advisors4.23%
  • UBS Asset Management4.16%
  • Capital Research3.74%

By investor type

  • Mutual Fund110.60%
  • Individual/Insider5.93%
  • Hedge Fund3.98%
  • Public Company2.97%
  • Government Pension Fund1.75%
  • Private Company1.42%
  • Insurance Company0.56%
  • Family Office/Trust0.10%

Reported short interest has fallen from 13.86% to 13.31% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 2,121,571 13.3% 8.2
31 Aug 2026 2,051,797 12.9% 5.0
14 Aug 2026 2,033,340 12.3% 13.3
31 Jul 2026 2,090,772 12.7% 12.4
15 Jul 2026 2,136,872 13.0% 11.0
30 Jun 2026 2,284,926 13.9% 8.4

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