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First Interstate BancSystem FIBK

US equityMarket cap rank #2395
$35.62 −$0.38 (-1.06%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $35.62 0.00%
Open$36.07
Prev close$36.00
Day range$35.51 – $36.07
Volume2.21M
Market cap$3.39B
P/E (TTM)11.0
Dividend yield5.28%

Ownership & positioning

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

Institutional ownership101.1%+0.16 pts vs. prior quarter
Institutions holding355-1 vs. prior quarter
Insider trades (recent)29 buys / 16 sellsNet buying
Short interest10.37% of floatDays to cover 10.3 · as of 15 Sep 2026
Short-sale volume share22.5%5-day average of daily volume

Short-sale volume as % of daily volume

17%23%29%36%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$4.15M (9 inflow days, 11 outflow days).

The five largest holders on file together own 37.7% of shares outstanding.

Largest holders

  • BlackRock14.41%
  • State Street Global Advisors6.56%
  • Dimensional Fund Advisors6.07%
  • Vanguard Portfolio Management, LLC5.78%
  • First Interstate Bank4.84%
  • James Scott4.82%
  • Vanguard Capital Management, LLC4.51%
  • HoldCo Advisors, LP4.14%

By investor type

  • Mutual Fund80.25%
  • Individual/Insider7.53%
  • Hedge Fund6.73%
  • Private Company4.90%
  • Bank/Investment Bank4.84%
  • Public Company2.05%
  • Sovereign Wealth Fund1.03%
  • Government Pension Fund1.01%

Reported short interest has risen from 9.51% to 10.37% 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 9,884,438 10.4% 10.3
31 Aug 2026 9,519,141 10.0% 11.6
14 Aug 2026 8,897,125 9.3% 8.8
31 Jul 2026 8,983,565 9.4% 6.3
15 Jul 2026 9,218,865 9.5% 9.4
30 Jun 2026 9,237,536 9.5% 7.4

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