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Perimeter Solutions PRM

US equityMarket cap rank #2168Specialty Chemicals
$28.07 +$0.62 (+2.26%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $28.07 0.00%
Open$27.44
Prev close$27.45
Day range$27.25 – $28.36
Volume1.09M
Market cap$4.59B
P/E (TTM)–
Dividend yield–

Ownership & positioning

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

Institutional ownership86.4%-0.02 pts vs. prior quarter
Institutions holding381+1 vs. prior quarter
Insider trades (recent)20 buys / 30 sellsNet selling
Short interest4.28% of floatDays to cover 7.0 · as of 15 Sep 2026
Short-sale volume share22.5%5-day average of daily volume

Short-sale volume as % of daily volume

13%21%29%38%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$10.29M (4 inflow days, 16 outflow days).

The five largest holders on file together own 36.5% of shares outstanding.

Largest holders

  • The WindAcre Partnership LLC9.87%
  • Principal Global Investors, LLC8.17%
  • BlackRock7.43%
  • FMR5.86%
  • William Thorndike5.21%
  • Vanguard Capital Management, LLC4.70%
  • Dimensional Fund Advisors2.64%
  • Geode Capital Management, LLC2.58%

By investor type

  • Mutual Fund73.10%
  • Individual/Insider8.68%
  • Hedge Fund5.17%
  • Public Company3.57%
  • Private Company2.92%
  • Family Office/Trust0.58%
  • Government Pension Fund0.45%
  • Sovereign Wealth Fund0.29%

Reported short interest has risen from 3.19% to 4.28% 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 7,004,455 4.3% 7.0
31 Aug 2026 6,191,959 3.8% 5.7
14 Aug 2026 5,898,317 3.6% 3.8
31 Jul 2026 5,039,463 3.1% 2.8
15 Jul 2026 4,706,692 2.9% 3.9
30 Jun 2026 5,207,323 3.2% 2.0

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