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Pulse Biosciences PLSE

US equityMarket cap rank #2357Medical Instruments & Supplies
$50.50 +$2.60 (+5.43%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $50.50 0.00%
Open$47.89
Prev close$47.90
Day range$47.47 – $50.99
Volume433.5K
Market cap$3.60B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership16.1%-0.06 pts vs. prior quarter
Institutions holding137+2 vs. prior quarter
Insider trades (recent)38 buys / 12 sellsNet buying
Short interest4.40% of floatDays to cover 3.9 · as of 15 Sep 2026
Short-sale volume share18.3%5-day average of daily volume

Short-sale volume as % of daily volume

12%16%20%23%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$328.1K (6 inflow days, 14 outflow days).

The five largest holders on file together own 75.0% of shares outstanding.

Largest holders

  • Robert Duggan68.45%
  • BlackRock2.06%
  • Bank of America Corporation2.03%
  • Vanguard Capital Management, LLC1.29%
  • Mahkam Zanganeh1.22%
  • Portolan Capital Management, LLC1.06%
  • T. Rowe Price Group, Inc.1.05%
  • Balyasny Asset Management L.P.1.01%

By investor type

  • Individual/Insider70.16%
  • Mutual Fund9.20%
  • Hedge Fund3.55%
  • Public Company2.21%
  • Private Company0.93%
  • Sovereign Wealth Fund0.15%
  • Government Pension Fund0.05%
  • Insurance Company0.03%

Reported short interest has risen from 4.13% to 4.40% 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 3,139,674 4.4% 3.9
31 Aug 2026 3,121,131 4.4% 7.9
14 Aug 2026 2,765,732 3.9% 6.4
31 Jul 2026 2,983,029 4.3% 7.0
15 Jul 2026 2,889,600 4.2% 11.6
30 Jun 2026 2,856,310 4.1% 6.6

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