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Boost Run BRUN

US equityMarket cap rank #3125
$14.33 −$2.18 (-13.20%)
Market closed · Oct 5, 11:30 pm ET · Last extended-hours $14.44 +0.77%
Open$16.41
Prev close$16.51
Day range$14.15 – $16.43
Volume3.63M
Market cap$1.14B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership23.0%-0.28 pts vs. prior quarter
Institutions holding87+2 vs. prior quarter
Insider trades (recent)5 buys / 4 sellsNet buying
Short interest6.15% of floatDays to cover 2.5 · as of 15 Sep 2026
Short-sale volume share12.6%5-day average of daily volume

Short-sale volume as % of daily volume

7%11%14%17%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$2.07M (10 inflow days, 10 outflow days).

The five largest holders on file together own 62.2% of shares outstanding.

Largest holders

  • Andrew Karos37.15%
  • Harilaos Georgakopoulos10.08%
  • Sean Goodrich7.18%
  • TOMS Capital Investment Management LP4.91%
  • Daniel Gormley-Rahn2.87%
  • B. Weil2.56%
  • Tynan Wilke2.39%
  • FMR2.24%

By investor type

  • Individual/Insider63.28%
  • Hedge Fund15.18%
  • Mutual Fund6.33%
  • Public Company0.90%
  • Private Company0.55%
  • Family Office/Trust0.05%

Reported short interest has risen from 5.45% to 6.15% 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 4,888,745 6.2% 2.5
31 Aug 2026 4,343,734 5.5% 1.9
14 Aug 2026 5,431,224 7.1% 2.5
31 Jul 2026 4,598,132 6.0% 2.4
15 Jul 2026 3,198,116 5.2% 2.1
30 Jun 2026 3,348,998 5.5% 2.1

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