Primoris Services Corporation
Primoris Services Corporation (PRIM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PRIM · as of Sep 30, 2024
Ownership Breakdown
310
Institutional Holders
▲ 4 vs Q2
$2.93B
Total Inst. Value
▲ $405.29M vs Q2
54.25M
Shares Outstanding
freeFloat 98.90%
50.27M
13F Shares Held
▼ 361,717 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PRIM largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC water, sewer, pipeline, comm & power line construction | 6.16M | 11.48% | 11.48% | $357.93B | Nov 13, 2024 | ▲ 573.9K |
BLACKROCK, INC. water, sewer, pipeline, comm & power line construction | 5.59M | 10.41% | 10.41% | $324.75B | Nov 13, 2024 | NEW |
DIMENSIONAL FUND ADVISORS LP water, sewer, pipeline, comm & power line construction | 3.37M | 6.29% | 6.29% | $196.01B | Nov 7, 2024 | ▼ 206.1K |
FRANKLIN RESOURCES INC water, sewer, pipeline, comm & power line construction | 2.16M | 4.02% | 4.02% | $132.44B | Nov 27, 2024 | ▼ 528.0K |
INVESCO LTD. water, sewer, pipeline, comm & power line construction | 1.57M | 2.92% | 2.92% | $90.91B | Nov 12, 2024 | ▼ 37.7K |
VAN BERKOM & ASSOCIATES INC. water, sewer, pipeline, comm & power line construction | 1.39M | 2.60% | 2.60% | $80.96B | Nov 4, 2024 | ▲ 11.3K |
STATE STREET CORP water, sewer, pipeline, comm & power line construction | 1.28M | 2.38% | 2.38% | $74.20B | Nov 14, 2024 | ▼ 1.9K |
GEODE CAPITAL MANAGEMENT, LLC water, sewer, pipeline, comm & power line construction | 1.22M | 2.27% | 2.27% | $70.81B | Nov 12, 2024 | ▲ 15.1K |
FIRST TRUST ADVISORS LP water, sewer, pipeline, comm & power line construction | 983.7K | 1.83% | 1.83% | $57.13B | Nov 13, 2024 | ▲ 81.3K |
MORGAN STANLEY water, sewer, pipeline, comm & power line construction | 870.4K | 1.62% | 1.62% | $50.55B | May 14, 2025 | ▼ 52.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
21
Increased
+2.28M shares3
New Positions
first time holders25
Decreased
−2.12M shares0
Sold Out
fully exitedNet shares change (top 50)
+153.9K
+2.28M / −2.12M
Net new holders
-1
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PRIM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
13
Buy transactions
14
Sell transactions
0.93
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Vadlamudi Koti PRESIDENT & CEO | May 27, 2026 | Purchase | 7,815 | $127.96 | $1.00M | 7.8K | Form 4 ↗ |
Perisich John M. CHIEF LEGAL AND ADMIN OFFICER | May 28, 2026 | Sale | 2,133 | $125.75 | $268.2K | 27.6K | Form 4 ↗ |
Perisich John M. CHIEF LEGAL AND ADMIN OFFICER | May 28, 2026 | Sale | 9,450 | $126.68 | $1.20M | 18.1K | Form 4 ↗ |
Perisich John M. CHIEF LEGAL AND ADMIN OFFICER | May 28, 2026 | Sale | 6,017 | $127.66 | $768.1K | 12.1K | Form 4 ↗ |
Perisich John M. CHIEF LEGAL AND ADMIN OFFICER | May 28, 2026 | Sale | 6,147 | $128.65 | $790.8K | 6.0K | Form 4 ↗ |
Perisich John M. CHIEF LEGAL AND ADMIN OFFICER | May 28, 2026 | Sale | 5,855 | $129.85 | $760.3K | 105 | Form 4 ↗ |
Perisich John M. CHIEF LEGAL AND ADMIN OFFICER | May 28, 2026 | Sale | 105 | $130.26 | $13.7K | 0 | Form 4 ↗ |
Vadlamudi Koti PRESIDENT & CEO | May 27, 2026 | Award | 7,815 | $127.96 | $1.00M | 7.8K | Form 4 ↗ |
King David Lee director | May 26, 2026 | Sale | 12,333 | $118.55 | $1.46M | 22.6K | Form 4 ↗ |
King David Lee director | May 26, 2026 | Sale | 3,917 | $119.66 | $468.7K | 18.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Primoris Services Corporation (PRIM) is primarily owned by institutional investors, who hold approximately 92.7% of total shares outstanding. Company insiders own approximately 1.10%, while retail and public investors account for the remaining 6.25%.
The largest institutional shareholder of Primoris Services Corporation is VANGUARD GROUP INC, holding approximately 6.16 million shares — equal to 11.48% of outstanding shares — as of September 30, 2024.
A total of 310 institutional investors currently hold PRIM stock, with a combined institutional value of approximately $2.93 billion as of the most recent 13F filing period.
Frequently asked questions
PRIM ownershipPrimoris Services Corporation (PRIM) is primarily owned by institutional investors, who hold approximately 92.7% of shares. The largest shareholder is VANGUARD GROUP INC with a 11.48% stake. Company insiders hold 1.10%. Data sourced from SEC Form 13F as of September 30, 2024.