Primoris Services Corporation (PRIM) Ownership
PRIM ownership summary
as of October 18, 2026- Institutions
- 104.1% of shares outstanding
- Insiders
- 1.16% of shares outstanding
- Shares outstanding
- 53.8M
- Float
- 53.2M shares available to trade
- Short interest
- 12.83% 879K shares short
- Days to cover
- 3.88 short interest up 21.8% vs prior month
- Institutions 104.12%
- Insiders 1.16%
PRIM top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 12.70% | 6.8M | $500.5M | −1.5M (−18.0%) | June 30, 2026 |
| 2 | Wellington Management Company LLP | 8.69% | 4.7M | $342.3M | +2.8M (+148.7%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.80% | 3.1M | $228.7M | −530,560 (−14.5%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.38% | 2.4M | $172.4M | +19,743 (+0.8%) | June 30, 2026 |
| 5 | First Trust Advisors L.P. | 4.15% | 2.2M | $163.6M | −651,435 (−22.6%) | June 30, 2026 |
| 6 | State Street Corp | 3.37% | 1.8M | $132.8M | −249,388 (−12.1%) | June 30, 2026 |
| 7 | Millennium Management LLC | 2.77% | 1.5M | $109.3M | +1.1M (+272.4%) | June 30, 2026 |
| 8 | Southpoint Capital Advisors LP | 2.60% | 1.4M | $102.5M | +1.4M (0.0%) | June 30, 2026 |
| 9 | Morgan Stanley - Brokerage Accounts | 2.39% | 1.3M | $94.0M | +728,723 (+131.1%) | June 30, 2026 |
| 10 | Dimensional Fund Advisors, Inc. | 2.20% | 1.2M | $86.7M | +25,421 (+2.2%) | June 30, 2026 |
| 11 | Geode Capital Management, LLC | 2.04% | 1.1M | $80.4M | −357,866 (−24.6%) | June 30, 2026 |
| 12 | Nordea Investment Mgmt Bank Demark A/s | 1.65% | 887K | $65.0M | +831,230 (+1,481.6%) | June 30, 2026 |
| 13 | American Century Companies Inc | 1.64% | 885K | $64.8M | −193,479 (−17.9%) | June 30, 2026 |
| 14 | Point72 Asset Management, L.P. | 1.63% | 876K | $64.2M | +876,484 (0.0%) | June 30, 2026 |
| 15 | Amvescap Plc. | 1.57% | 848K | $62.1M | −549,055 (−39.3%) | June 30, 2026 |
| 16 | Westfield Capital Management Company, L.P. | 1.37% | 737K | $54.0M | −5,776 (−0.8%) | June 30, 2026 |
| 17 | FMR Inc | 1.18% | 637K | $46.7M | −68,727 (−9.7%) | June 30, 2026 |
| 18 | Charles Schwab Investment Management Inc | 1.03% | 555K | $40.6M | −128,996 (−18.9%) | June 30, 2026 |
| 19 | UBS Group AG | 1.01% | 545K | $39.9M | −50,920 (−8.5%) | June 30, 2026 |
| 20 | NORGES BANK | 0.96% | 517K | $37.9M | −315,356 (−37.9%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 8 holders added 7.8M shares and 12 cut 4.6M.
PRIM top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.96% | 3.2M | $234.7M | +711 (+0.0%) | September 30, 2026 |
| 2 | First Trust RBA Amer Indl RenaisTM ETF | 5.52% | 3.0M | $217.4M | +1,715 (+0.1%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.05% | 1.6M | $120.1M | −1,838 (−0.1%) | August 31, 2026 |
| 4 | Vanguard Small Cap Index | 2.20% | 1.2M | $86.8M | +202 (+0.0%) | August 31, 2026 |
| 5 | Vanguard Explorer Inv | 1.87% | 1.0M | $73.6M | +32,494 (+3.3%) | June 30, 2026 |
| 6 | Vanguard MStar Small Cap Value Index | 1.40% | 753K | $55.1M | +582 (+0.1%) | August 31, 2026 |
| 7 | Nordea 1 - Global Climate & Envir BI EUR | 1.32% | 712K | $52.1M | +33,239 (+4.9%) | August 31, 2026 |
| 8 | American Century Small Cap Growth Inv | 1.05% | 564K | $41.3M | +564,275 (0.0%) | June 30, 2026 |
| 9 | First Trust SMID Cp Rising Div Achv ETF | 0.99% | 534K | $39.1M | — | September 30, 2026 |
| 10 | iShares S&P Small-Cap 600 Growth ETF | 0.93% | 499K | $36.5M | — | September 30, 2026 |
| 11 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 490K | $35.8M | — | September 30, 2026 |
| 12 | Global X US Infrastructure Dev ETF | 0.90% | 485K | $35.5M | +3,420 (+0.7%) | September 30, 2026 |
| 13 | FullerThaler Behavioral Sm-Cp Gr R6 | 0.86% | 464K | $34.0M | +40,600 (+9.6%) | March 31, 2026 |
| 14 | Harbor Small Cap Growth Instl | 0.64% | 346K | $25.3M | +21,090 (+6.5%) | June 30, 2026 |
| 15 | State Street® SPDR® S&P 600™ Sm Cp GrETF | 0.58% | 310K | $22.7M | — | September 30, 2026 |
| 16 | Fidelity Stock Selector Small Cap | 0.56% | 303K | $22.2M | −50,700 (−14.3%) | July 31, 2026 |
| 17 | Hennessy Cornerstone Mid Cap 30 Inv | 0.56% | 303K | $22.2M | −9,700 (−3.1%) | September 30, 2026 |
| 18 | Schwab US Small-Cap ETF™ | 0.53% | 283K | $20.7M | +189 (+0.1%) | September 30, 2026 |
| 19 | Vanguard Tax-Managed Small Cap Adm | 0.51% | 277K | $20.3M | — | August 31, 2026 |
| 20 | BGF Sustainable Energy A2 | 0.51% | 275K | $20.1M | −117,326 (−29.9%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
PRIM insider transactions
latest 16| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-15 | Terry D Mccallister | Buy | $164.40 | 10 | $1,644 |
| 2026-03-03 | Gilbert Ray Cisneros, Jr. | Buy | $146.98 | — | — |
| 2026-02-18 | Gilbert Ray Cisneros, Jr. | Sell | $160.52 | — | — |
| 2026-01-15 | Terry D Mccallister | Buy | $138.00 | 12 | $1,656 |
| 2025-12-11 | John P Schauerman | Sell | $136.00 | 7,815 | $1.1M |
| 2025-12-11 | Gilbert Ray Cisneros, Jr. | Sell | $136.89 | — | — |
| 2025-12-08 | Carla S Mashinski | Sell | $135.14 | 2,082 | $281,361 |
| 2025-11-24 | Gilbert Ray Cisneros, Jr. | Sell | $124.10 | — | — |
| 2025-11-10 | David Lee King | Sell | $130.00 | 3,500 | $455,000 |
| 2025-11-07 | Patricia K Wagner | Sell | $125.23 | 13,491 | $1.7M |
| 2025-11-06 | Gilbert Ray Cisneros, Jr. | Sell | $126.43 | — | — |
| 2025-10-15 | Terry D Mccallister | Buy | $140.69 | 12 | $1,688 |
| 2025-09-15 | Jeremy Kinch | Sell | $124.00 | 3,006 | $372,744 |
| 2025-09-11 | Michael E Ching | Sell | $119.89 | 2,935 | $351,877 |
| 2025-08-12 | John P Schauerman | Sell | $114.01 | 20,000 | $2.3M |
| 2025-06-24 | John P Schauerman | Sell | $77.37 | 15,000 | $1.2M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
PRIM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns PRIM
Institutional investors own 104.1% of Primoris Services's shares and insiders 1.16%. The largest holder is BlackRock Inc with 12.70% of the shares (6.8M), as of June 30, 2026. Among the top 20 institutions, 8 added shares and 12 reduced their stake in the latest filings. Short interest is 12.83% of the float, or 3.88 days of average trading volume. The share count rose 6.0% since 2014.
Related: PRIM analyst forecast, PRIM key metrics, PRIM dividend history. See the PRIM stock overview for the latest quote and news.
PRIM ownership FAQ
Who owns the most Primoris Services stock?
The largest shareholders of Primoris Services are BlackRock Inc (12.70%), Wellington Management Company LLP (8.69%), Vanguard Portfolio Management, LLC (5.80%), Vanguard Capital Management, LLC (4.38%), First Trust Advisors L.P. (4.15%).
What percentage of Primoris Services is owned by institutions?
Institutions hold 104.1% of Primoris Services's shares outstanding; insiders hold 1.16%.
Which funds own Primoris Services?
The largest fund holders of Primoris Services are iShares Core S&P Small-Cap ETF (5.96%), First Trust RBA Amer Indl RenaisTM ETF (5.52%), Vanguard MStar Total Stk Mkt Idx Invest (3.05%), Vanguard Small Cap Index (2.20%), Vanguard Explorer Inv (1.87%).
What is Primoris Services's short interest?
879K shares of Primoris Services were sold short, 12.83% of the float; at the average daily volume it would take 3.88 days to cover.
Are insiders buying or selling Primoris Services?
Of the latest 16 reported insider transactions in Primoris Services (since June 24, 2025), 4 were purchases and 12 were sales.
How many shares of Primoris Services are outstanding?
Primoris Services has 53.8M shares outstanding, of which 53.2M are in the public float.