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Tenable Holdings TENB

US equityMarket cap rank #2240
$38.51 +$1.66 (+4.50%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $38.98 +1.21%
Open$36.96
Prev close$36.85
Day range$36.80 – $38.73
Volume3.45M
Market cap$4.24B
P/E (TTM)641.8
Dividend yield–

Ownership & positioning

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

Institutional ownership112.9%+5.34 pts vs. prior quarter
Institutions holding371-2 vs. prior quarter
Insider trades (recent)35 buys / 15 sellsNet buying
Short interest16.51% of floatDays to cover 3.0 · as of 15 Sep 2026
Short-sale volume share18.9%5-day average of daily volume

Short-sale volume as % of daily volume

15%19%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: −$35.87M (9 inflow days, 11 outflow days).

The five largest holders on file together own 49.9% of shares outstanding.

Largest holders

  • BlackRock17.55%
  • Columbia Management Investment Advisers, LLC13.82%
  • Vanguard Portfolio Management, LLC9.29%
  • Vanguard Capital Management, LLC5.26%
  • Arrowstreet Capital, Limited Partnership4.00%
  • FMR2.94%
  • State Street Global Advisors2.94%
  • First Trust Advisors L.P.2.70%

By investor type

  • Mutual Fund94.50%
  • Hedge Fund8.48%
  • Public Company5.49%
  • Private Company3.00%
  • Individual/Insider1.50%
  • Government Pension Fund0.82%
  • Insurance Company0.45%
  • Family Office/Trust0.16%

Reported short interest has risen from 10.07% to 16.51% 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 18,181,258 16.5% 3.0
31 Aug 2026 15,183,618 13.8% 3.3
14 Aug 2026 10,500,225 9.5% 3.6
31 Jul 2026 10,193,657 9.2% 2.7
15 Jul 2026 10,628,539 9.6% 2.8
30 Jun 2026 11,100,510 10.1% 3.2

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