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AtriCure ATRC

US equityMarket cap rank #2522
$56.37 +$1.23 (+2.23%)
Pre-market · Oct 6, 7:40 am ET · After hours $56.37 0.00%
Open$54.14
Prev close$55.14
Day range$53.86 – $56.60
Volume1.10M
Market cap$2.87B
P/E (TTM)268.4
Dividend yield–

Ownership & positioning

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

Institutional ownership105.5%-0.01 pts vs. prior quarter
Institutions holding307+0 vs. prior quarter
Insider trades (recent)22 buys / 28 sellsNet selling
Short interest8.41% of floatDays to cover 3.6 · as of 15 Sep 2026
Short-sale volume share22.1%5-day average of daily volume

Short-sale volume as % of daily volume

12%18%23%28%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$11.35M (7 inflow days, 13 outflow days).

The five largest holders on file together own 33.0% of shares outstanding.

Largest holders

  • BlackRock8.80%
  • Wellington Management Group6.87%
  • Vanguard Portfolio Management, LLC6.15%
  • Hood River Capital Management LLC5.71%
  • AllianceBernstein5.44%
  • Vanguard Capital Management, LLC5.01%
  • Macquarie Investment Management Business Trust3.41%
  • Goldman Sachs Asset Management, L.P.2.91%

By investor type

  • Mutual Fund88.01%
  • Hedge Fund11.56%
  • Individual/Insider4.01%
  • Public Company2.70%
  • Private Company1.01%
  • Sovereign Wealth Fund0.74%
  • Insurance Company0.73%
  • Government Pension Fund0.72%

Reported short interest has fallen from 8.79% to 8.41% 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 4,279,518 8.4% 3.6
31 Aug 2026 4,141,306 8.1% 5.8
14 Aug 2026 3,922,615 7.7% 6.1
31 Jul 2026 3,864,377 7.6% 3.7
15 Jul 2026 4,864,713 9.6% 5.7
30 Jun 2026 4,449,392 8.8% 3.6

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