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Primoris Services PRIM

US equityMarket cap rank #2215Engineering & Construction
$80.57 +$1.49 (+1.88%)
Market closed · Oct 5, 11:20 pm ET · Last extended-hours $81.80 +1.53%
Open$79.14
Prev close$79.08
Day range$75.67 – $81.60
Volume1.51M
Market cap$4.34B
P/E (TTM)31.6
Dividend yield0.40%

Ownership & positioning

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

Institutional ownership103.8%-0.19 pts vs. prior quarter
Institutions holding544-5 vs. prior quarter
Insider trades (recent)41 buys / 9 sellsNet buying
Short interest10.11% of floatDays to cover 4.3 · as of 15 Sep 2026
Short-sale volume share16.6%5-day average of daily volume

Short-sale volume as % of daily volume

14%15%17%19%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$26.09M (4 inflow days, 16 outflow days).

The five largest holders on file together own 36.3% of shares outstanding.

Largest holders

  • BlackRock12.70%
  • Wellington Management Group8.69%
  • Vanguard Portfolio Management, LLC5.80%
  • Vanguard Capital Management, LLC5.01%
  • First Trust Advisors L.P.4.15%
  • State Street Global Advisors3.37%
  • Millennium Management LLC2.77%
  • Southpoint Capital Advisors LP2.60%

By investor type

  • Mutual Fund78.24%
  • Hedge Fund17.06%
  • Public Company3.40%
  • Government Pension Fund2.30%
  • Individual/Insider1.07%
  • Private Company1.05%
  • Sovereign Wealth Fund0.96%
  • Insurance Company0.32%

Reported short interest has risen from 5.60% to 10.11% 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 5,441,304 10.1% 4.3
31 Aug 2026 5,077,022 9.4% 5.2
14 Aug 2026 4,514,158 8.4% 3.4
31 Jul 2026 4,490,057 8.3% 3.1
15 Jul 2026 2,988,512 5.5% 2.4
30 Jun 2026 3,040,275 5.6% 1.0

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