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Power Integrations POWI

US equityMarket cap rank #2473SemiconductorsPower semiconductor
$54.36 −$0.10 (-0.18%)
Pre-market · Oct 6, 5:20 am ET · After hours $55.39 +1.89%
Open$54.07
Prev close$54.46
Day range$52.17 – $54.63
Volume704.0K
Market cap$3.04B
P/E (TTM)123.5
Dividend yield1.56%

Ownership & positioning

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

Institutional ownership113.1%-0.67 pts vs. prior quarter
Institutions holding433-3 vs. prior quarter
Insider trades (recent)16 buys / 32 sellsNet selling
Short interest10.52% of floatDays to cover 6.7 · as of 15 Sep 2026
Short-sale volume share17.1%5-day average of daily volume

Short-sale volume as % of daily volume

13%18%23%27%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$3.64M (9 inflow days, 11 outflow days).

The five largest holders on file together own 42.3% of shares outstanding.

Largest holders

  • BlackRock15.61%
  • Vanguard Portfolio Management, LLC9.29%
  • Wellington Management Group6.44%
  • State Street Global Advisors5.72%
  • Vanguard Capital Management, LLC5.21%
  • William Blair Investment Management, LLC4.26%
  • Neuberger Berman Investment Advisers LLC3.62%
  • T. Rowe Price Group, Inc.3.45%

By investor type

  • Mutual Fund107.85%
  • Public Company1.92%
  • Individual/Insider1.50%
  • Government Pension Fund1.27%
  • Hedge Fund0.99%
  • Private Company0.58%
  • Insurance Company0.28%
  • Family Office/Trust0.14%

Reported short interest has risen from 8.39% to 10.52% 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 5,878,245 10.5% 6.7
31 Aug 2026 5,675,387 10.2% 8.1
14 Aug 2026 5,531,780 9.9% 9.2
31 Jul 2026 5,565,877 10.0% 8.3
15 Jul 2026 5,476,352 9.8% 6.9
30 Jun 2026 4,676,081 8.4% 4.1

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