Who owns Primoris Services (PRIM)
Which tracked institutional funds hold PRIM, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PRIM company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
PRIM’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes PRIM more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in PRIM divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, we do not read how tracked institutions changed their PRIM positions: many holders could not be matched across the two filings, most often because the security’s identifier changed and our mapping is incomplete, or because funds are still filing for the newer quarter. Over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 6,837,017 | $678M | 13.7% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 4,675,487 | $463M | 9.4% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 3,123,356 | $310M | 6.3% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,355,491 | $233M | 4.7% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 2,234,728 | $222M | 4.5% | 2026-Q2 |
| STATE STREET CORP trimmed | 1,814,143 | $180M | 3.6% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 1,492,740 | $148M | 3.0% | 2026-Q2 |
| Southpoint Capital Advisors LP new | 1,400,000 | $139M | 2.8% | 2026-Q2 |
| MORGAN STANLEY added | 1,284,470 | $127M | 2.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,184,542 | $117M | 2.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 1,098,315 | $109M | 2.2% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB added | 887,332 | $86M | 1.7% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 884,645 | $88M | 1.8% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 876,484 | $87M | 1.8% | 2026-Q2 |
| Invesco Ltd. trimmed | 847,692 | $84M | 1.7% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP trimmed | 737,493 | $73M | 1.5% | 2026-Q2 |
| FMR LLC trimmed | 637,265 | $63M | 1.3% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 554,587 | $55M | 1.1% | 2026-Q2 |
| UBS Group AG trimmed | 544,654 | $54M | 1.1% | 2026-Q2 |
| NORGES BANK added | 517,320 | $51M | 1.0% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC new | 468,762 | $46M | 0.9% | 2026-Q2 |
| Nuveen, LLC added | 462,954 | $46M | 0.9% | 2026-Q2 |
| Madison Avenue Partners, LP new | 462,058 | $46M | 0.9% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 461,847 | $46M | 0.9% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 445,283 | $44M | 0.9% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 431,182 | $43M | 0.9% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 430,630 | $43M | 0.9% | 2026-Q2 |
| Electron Capital Partners, LLC new | 415,103 | $41M | 0.8% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 403,699 | $39M | 0.8% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC new | 399,966 | $40M | 0.8% | 2026-Q2 |
| HENNESSY ADVISORS INC added | 384,500 | $38M | 0.8% | 2026-Q2 |
| BRUNI J V & CO /CO trimmed | 380,845 | $38M | 0.8% | 2026-Q2 |
| J. Safra Sarasin Holding AG new | 374,968 | $19M | 0.4% | 2026-Q2 |
| Yaupon Capital Management LP added | 366,972 | $36M | 0.7% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 347,875 | $34M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 341,084 | $34M | 0.7% | 2026-Q2 |
| Vontobel Holding Ltd. new | 337,666 | $33M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 322,562 | $32M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 319,977 | $32M | 0.6% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 303,302 | $29M | 0.6% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 302,368 | $30M | 0.6% | 2026-Q2 |
| MARSHALL WACE, LLP added | 294,605 | $29M | 0.6% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 281,166 | $28M | 0.6% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 248,068 | $25M | 0.5% | 2026-Q2 |
| Merewether Investment Management, LP trimmed | 211,913 | $21M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 209,065 | $21M | 0.4% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 206,405 | $20M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 204,804 | $20M | 0.4% | 2026-Q2 |
| Raiffeisen Bank International AG added | 198,000 | $19M | 0.4% | 2026-Q2 |
| Engine Capital Management, LP new | 195,838 | $19M | 0.4% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 187,845 | $17M | 0.4% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 178,892 | $18M | 0.4% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 174,209 | $17M | 0.4% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 170,516 | $17M | 0.3% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 161,736 | $16M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 159,520 | $16M | 0.3% | 2026-Q2 |
| Zimmer Partners, LP new | 159,500 | $16M | 0.3% | 2026-Q2 |
| Allianz Asset Management GmbH added | 156,772 | $22M | 0.5% | 2026-Q2 |
| Quadrature Capital Ltd added | 150,218 | $15M | 0.3% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 142,795 | $14M | 0.3% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 140,948 | $14M | 0.3% | 2026-Q2 |
| Alyeska Investment Group, L.P. trimmed | 140,812 | $14M | 0.3% | 2026-Q2 |
| Penn Capital Management Company, LLC new | 138,964 | $14M | 0.3% | 2026-Q2 |
| Grantham, Mayo, Van Otterloo & Co. LLC added | 138,714 | $14M | 0.3% | 2026-Q2 |
| ARDSLEY ADVISORY PARTNERS LP added | 135,000 | $13M | 0.3% | 2026-Q2 |
| Sagefield Capital LP new | 133,959 | $13M | 0.3% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 132,239 | $13M | 0.3% | 2026-Q2 |
| TCW GROUP INC added | 131,023 | $13M | 0.3% | 2026-Q2 |
| Swedbank AB trimmed | 130,000 | $13M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 128,698 | $13M | 0.3% | 2026-Q2 |
| 1060 Capital, LLC added | 125,000 | $12M | 0.3% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 121,170 | $12M | 0.2% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS added | 116,516 | $12M | 0.2% | 2026-Q2 |
| BOURGEON CAPITAL MANAGEMENT LLC new | 110,490 | $11M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 109,041 | $11M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 108,900 | $11M | 0.2% | 2026-Q2 |
| Holocene Advisors, LP added | 107,957 | $11M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 106,897 | $11M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 106,805 | $11M | 0.2% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 104,649 | $10M | 0.2% | 2026-Q2 |
| Weiss Asset Management LP added | 98,369 | $10M | 0.2% | 2026-Q2 |
| Jump Financial, LLC added | 97,393 | $10M | 0.2% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 95,189 | $9M | 0.2% | 2026-Q2 |
| SIR Capital Management, L.P. added | 93,640 | $9M | 0.2% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 92,649 | $9M | 0.2% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 91,429 | $9M | 0.2% | 2026-Q2 |
| Covalis Capital LLP new | 91,093 | $9M | 0.2% | 2026-Q2 |
| CenterBook Partners LP added | 86,441 | $9M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 84,417 | $8M | 0.2% | 2026-Q2 |
| Dana Investment Advisors, Inc. trimmed | 83,158 | $8M | 0.2% | 2026-Q2 |
| VAN ECK ASSOCIATES CORP new | 82,962 | $8M | 0.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 80,022 | $8M | 0.2% | 2026-Q2 |
| DF DENT & CO INC new | 79,544 | $8M | 0.2% | 2026-Q2 |
| Advisors Asset Management, Inc. trimmed | 73,047 | $7M | 0.1% | 2026-Q2 |
| Clearbridge Investments, LLC trimmed | 69,984 | $7M | 0.1% | 2026-Q2 |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC added | 68,724 | $7M | 0.1% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC new | 64,250 | $6M | 0.1% | 2026-Q2 |
| Bolthouse Investments, LLC trimmed | 63,000 | $6M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 62,896 | $6M | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV trimmed | 62,476 | $6M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.