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Primoris Services Corp

PRIM
Exchange
NYSE
Industry
Water, Sewer, Pipeline, Comm & Power Line Construction
SEC CIK
0001361538

In the last 90 days, Primoris Services Corp insiders filed 1 open-market purchase and 0 sales; 452 institutions reported holding it in 13F filings for Q2 2026, worth $5.44B in total; Soros Fund Management is the only superinvestor holding it.

Four kinds of short-selling data, each measuring something different:

  • Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
  • Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
  • Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
  • ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.

More in the glossary.

Short interest

Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.

Short interest
4.81M
Shares, settlement Oct 15, 2026
Change
−229.0K
−4.6% vs. Sep 30, 2026
Days to cover
3.28
Short interest ÷ average daily volume
Average daily volume
1.47M
Shares, as reported by FINRA
Short interest by settlement date
Oct 15, 2024: 1,224,509 sharesOct 31, 2024: 1,635,990 sharesNov 15, 2024: 1,850,859 sharesNov 29, 2024: 1,735,598 sharesDec 13, 2024: 1,673,336 sharesDec 31, 2024: 1,347,585 sharesJan 15, 2025: 1,390,681 sharesJan 31, 2025: 1,712,740 sharesFeb 14, 2025: 1,794,221 sharesFeb 28, 2025: 2,116,222 sharesMar 14, 2025: 2,268,876 sharesMar 31, 2025: 2,238,129 sharesApr 15, 2025: 2,760,681 sharesApr 30, 2025: 2,803,434 sharesMay 15, 2025: 3,024,231 sharesMay 30, 2025: 2,478,348 sharesJun 13, 2025: 2,308,875 sharesJun 30, 2025: 2,443,396 sharesJul 15, 2025: 2,565,241 sharesJul 31, 2025: 2,233,977 sharesAug 15, 2025: 2,196,350 sharesAug 29, 2025: 2,107,948 sharesSep 15, 2025: 1,898,866 sharesSep 30, 2025: 1,542,857 sharesOct 15, 2025: 1,653,379 sharesOct 31, 2025: 1,638,977 sharesNov 14, 2025: 1,596,411 sharesNov 28, 2025: 1,799,552 sharesDec 15, 2025: 2,307,111 sharesDec 31, 2025: 3,279,778 sharesJan 15, 2026: 3,156,876 sharesJan 30, 2026: 2,843,288 sharesFeb 13, 2026: 2,743,105 sharesFeb 27, 2026: 2,777,156 sharesMar 13, 2026: 2,709,690 sharesMar 31, 2026: 3,132,468 sharesApr 15, 2026: 3,034,505 sharesApr 30, 2026: 2,620,390 sharesMay 15, 2026: 3,547,956 sharesMay 29, 2026: 4,213,881 sharesJun 15, 2026: 4,015,562 sharesJun 30, 2026: 3,040,275 sharesJul 15, 2026: 2,988,512 sharesJul 31, 2026: 4,490,057 sharesAug 14, 2026: 4,514,158 sharesAug 31, 2026: 5,077,022 sharesSep 15, 2026: 5,441,304 sharesSep 30, 2026: 5,036,855 sharesOct 15, 2026: 4,807,850 shares
Short interest in PRIM by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 15, 20264.81M−229.0K−4.6%1.47M3.28
Sep 30, 20265.04M−404.4K−7.4%1.37M3.69
Sep 15, 20265.44M+364.3K+7.2%1.26M4.32
Aug 31, 20265.08M+562.9K+12.5%981.2K5.17
Aug 14, 20264.51M+24.1K+0.5%1.32M3.42
Jul 31, 20264.49M+1.50M+50.2%1.45M3.11
Jul 15, 20262.99M−51.8K−1.7%1.27M2.36
Jun 30, 20263.04M−975.3K−24.3%3.53M1.00
Jun 15, 20264.02M−198.3K−4.7%2.32M1.73
May 29, 20264.21M+665.9K+18.8%2.12M1.99
May 15, 20263.55M+927.6K+35.4%3.40M1.04
Apr 30, 20262.62M−414.1K−13.7%822.8K3.18
Apr 15, 20263.03M−98.0K−3.1%608.2K4.99
Mar 31, 20263.13M+422.8K+15.6%813.0K3.85
Mar 13, 20262.71M−67.5K−2.4%860.7K3.15
Feb 27, 20262.78M+34.1K+1.2%923.3K3.01
Feb 13, 20262.74M−100.2K−3.5%722.1K3.80
Jan 30, 20262.84M−313.6K−9.9%700.7K4.06
Jan 15, 20263.16M−122.9K−3.8%752.1K4.20
Dec 31, 20253.28M+972.7K+42.2%1.72M1.91
Dec 15, 20252.31M+507.6K+28.2%1.00M2.30
Nov 28, 20251.80M+203.1K+12.7%656.2K2.74
Nov 14, 20251.60M−42.6K−2.6%1.06M1.51
Oct 31, 20251.64M−14.4K−0.9%760.9K2.15
Oct 15, 20251.65M+110.5K+7.2%752.5K2.20
Sep 30, 20251.54M−356.0K−18.8%953.0K1.62
Sep 15, 20251.90M−209.1K−9.9%833.6K2.28
Aug 29, 20252.11M−88.4K−4.0%722.4K2.92
Aug 15, 20252.20M−37.6K−1.7%1.22M1.80
Jul 31, 20252.23M−331.3K−12.9%868.1K2.57
Jul 15, 20252.57M+121.8K+5.0%791.1K3.24
Jun 30, 20252.44M+134.5K+5.8%952.5K2.57
Jun 13, 20252.31M−169.5K−6.8%638.4K3.62
May 30, 20252.48M−545.9K−18.1%887.1K2.79
May 15, 20253.02M+220.8K+7.9%1.40M2.16
Apr 30, 20252.80M+42.8K+1.6%776.2K3.61
Apr 15, 20252.76M+522.6K+23.4%900.3K3.07
Mar 31, 20252.24M−30.7K−1.4%1.05M2.14
Mar 14, 20252.27M+152.7K+7.2%1.04M2.19
Feb 28, 20252.12M+322.0K+18.0%1.40M1.51
Feb 14, 20251.79M+81.5K+4.8%653.3K2.75
Jan 31, 20251.71M+322.1K+23.2%920.6K1.86
Jan 15, 20251.39M+43.1K+3.2%484.2K2.87
Dec 31, 20241.35M−325.8K−19.5%740.0K1.82
Dec 13, 20241.67M−62.3K−3.6%571.8K2.93
Nov 29, 20241.74M−115.3K−6.2%522.2K3.32
Nov 15, 20241.85M+214.9K+13.1%1.09M1.69
Oct 31, 20241.64M+411.5K+33.6%685.1K2.39
Oct 15, 20241.22M+262.0K+27.2%531.6K2.30

Fails-to-deliver

Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.

Fails-to-deliver in PRIM by settlement date
Settlement dateSharesPriceValue
Oct 8, 2026306$82.16$25.1K
Oct 7, 2026306$84.97$26.0K
Oct 5, 20269,508$79.08$751.9K
Oct 1, 202660,542$74.52$4.51M
Sep 29, 20266$71.12$426.72
Sep 22, 2026550$76.91$42.3K
Sep 18, 2026116$76.59$8.88K
Sep 17, 2026284$76.94$21.9K
Sep 14, 2026209$75.28$15.7K
Sep 4, 20261$73.59$73.59
Aug 26, 20262,001$74.80$149.7K
Aug 20, 2026654$79.93$52.3K
Aug 10, 20261,861$82.63$153.8K
Aug 5, 202610,656$90.85$968.1K
Jul 31, 202621,636$85.65$1.85M
Jul 30, 2026137$74.76$10.2K
Jul 20, 20261,000$85.96$86.0K
Jul 16, 20261,132$90.67$102.6K
Jul 15, 2026273$88.63$24.2K
Jul 13, 20261,457$86.60$126.2K
Jul 8, 202623,315$86.97$2.03M
Jul 7, 20262$90.20$180.4
Jul 6, 202644,803$88.20$3.95M
Jun 30, 202684,226$97.24$8.19M
Jun 29, 202684,828$93.11$7.90M
Jun 24, 20262,172$84.95$184.5K
Jun 22, 202660,235$101.30$6.10M
Jun 15, 20263,599$98.65$355.0K
Jun 12, 20261,404$94.50$132.7K
Jun 11, 2026637$93.88$59.8K

Daily short volume

Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.

The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.

Off-exchange short volume in PRIM by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 9, 2026150,9750507,66629.7%
Nov 6, 2026321,32016,3821,332,85924.1%
Nov 5, 2026312,0783,9741,023,87430.5%
Nov 4, 2026465,9007,9781,345,97834.6%
Nov 3, 2026234,1190602,90338.8%
Nov 2, 2026278,4480541,14151.5%
Oct 30, 2026152,072609376,88140.4%
Oct 29, 2026232,7950438,68953.1%
Oct 28, 2026394,42510655,08460.2%
Oct 27, 2026174,315200356,84848.8%
Oct 26, 2026115,199921366,51231.4%
Oct 23, 2026142,3892,878678,02321.0%
Oct 22, 2026191,7013,699980,75319.5%
Oct 21, 2026269,57467598,14045.1%
Oct 20, 2026196,3702,042488,20340.2%
Oct 19, 2026212,4662,446500,65242.4%
Oct 16, 2026246,1180527,57946.7%
Oct 15, 2026316,317114961,85132.9%
Oct 14, 2026313,25947553,13256.6%
Oct 13, 2026154,9801,150274,91656.4%
Oct 12, 2026264,542279453,78458.3%
Oct 9, 2026297,20822563,63052.7%
Oct 8, 2026326,761335528,88561.8%
Oct 7, 2026311,2720453,99768.6%
Oct 6, 2026374,0090642,02358.3%
Oct 5, 2026392,3011,211596,62365.8%
Oct 2, 2026316,20686819,31038.6%
Oct 1, 2026210,8560542,39138.9%
Sep 30, 2026309,7520615,93450.3%
Sep 29, 2026297,62936661,02445.0%

ATS (dark pool) volume

Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.

Weekly ATS and OTC volume in PRIM
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T12,699,53458,133675,42012,11480.0%
Oct 12, 2026T12,332,77650,890885,45911,49172.5%
Oct 5, 2026T12,337,49156,098844,04412,03773.5%
Sep 28, 2026T12,501,25648,465804,50712,31575.7%
Sep 21, 2026T11,487,20741,957698,1599,18368.1%
Sep 14, 2026T12,558,87258,280884,4798,91874.3%
Sep 7, 2026T11,226,05233,083394,8897,58375.6%
Aug 31, 2026T11,853,57348,850552,9929,07177.0%
Aug 24, 2026T11,546,17439,652596,5178,31972.2%
Aug 17, 2026T11,514,58442,470470,9979,85676.3%
Aug 10, 2026T11,621,24039,026851,0117,25865.6%
Aug 3, 2026T12,447,17756,630673,0869,39678.4%