Who owns Barrett Business Services, Inc. (BBSI)
Which tracked institutional funds hold BBSI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BBSI company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on BBSI is one-sided between 2025-Q4 and 2026-Q1: 24 added or opened and 71 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
BBSI’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 BBSI more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in BBSI 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 2025-Q4 and 2026-Q1, across 190 tracked filers holding BBSI, 113 increased or opened the position and 96 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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
Funds opening or closing a position in BBSI between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 10
- VANGUARD CAPITAL MANAGEMENT LLC$31M
- Polar Asset Management Partners Inc.$8M
- VANGUARD PORTFOLIO MANAGEMENT LLC$7M
- VANGUARD FIDUCIARY TRUST CO$5M
- SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC$1M
- Corient Private Wealth LLC$1M
Full exits 15
- VANGUARD GROUP INC$47M
- GW&K Investment Management, LLC$19M
- Point72 Asset Management, L.P.$9M
- MILLENNIUM MANAGEMENT LLC$5M
- 4D Advisors, LLC$3M
- SG Americas Securities, LLC$1M
Largest adds
- ROYCE & ASSOCIATES LP$9M
- GOLDMAN SACHS GROUP INC$3M
- Y-Intercept (Hong Kong) Ltd$2M
- SEI INVESTMENTS CO$2M
- JACOBS LEVY EQUITY MANAGEMENT, INC$1M
- ALLIANCEBERNSTEIN L.P.$1M
Largest trims
- Mawer Investment Management Ltd.$21M
- Thrivent Financial for Lutherans$19M
- BlackRock, Inc.$13M
- Private Capital Management, LLC$7M
- Qube Research & Technologies Ltd$6M
- GEODE CAPITAL MANAGEMENT, LLC$6M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 1,908,249 | $56M | 7.7% | 2026-Q1 |
| Thrivent Financial for Lutherans trimmed | 1,707,295 | $50M | 6.9% | 2026-Q1 |
| Mawer Investment Management Ltd. trimmed | 1,701,812 | $50M | 6.9% | 2026-Q1 |
| ROYCE & ASSOCIATES LP added | 1,372,898 | $40M | 5.6% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,072,049 | $31M | 4.3% | 2026-Q1 |
| Private Capital Management, LLC added | 999,910 | $29M | 4.0% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 829,142 | $24M | 3.4% | 2026-Q1 |
| Trigran Investments, Inc. added | 718,390 | $21M | 2.9% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 661,181 | $19M | 2.7% | 2026-Q1 |
| STATE STREET CORP added | 658,122 | $19M | 2.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 639,462 | $19M | 2.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 618,513 | $18M | 2.5% | 2026-Q1 |
| HEARTLAND ADVISORS INC | 450,000 | $13M | 1.8% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 313,117 | $9M | 1.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 301,104 | $9M | 1.2% | 2026-Q1 |
| Polar Asset Management Partners Inc. added | 285,000 | $8M | 1.2% | 2026-Q1 |
| RIVERBRIDGE PARTNERS LLC trimmed | 284,277 | $8M | 1.2% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 273,030 | $8M | 1.1% | 2026-Q1 |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 270,970 | $8M | 1.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 269,433 | $8M | 1.1% | 2026-Q1 |
| Tieton Capital Management, LLC added | 263,765 | $8M | 1.1% | 2026-Q1 |
| MORGAN STANLEY trimmed | 263,458 | $8M | 1.1% | 2026-Q1 |
| Nuveen, LLC added | 259,022 | $8M | 1.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 253,455 | $7M | 1.0% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 251,021 | $7M | 1.0% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 231,616 | $7M | 0.9% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 181,604 | $5M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 179,786 | $5M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp added | 170,695 | $5M | 0.7% | 2026-Q1 |
| SEI INVESTMENTS CO added | 168,356 | $5M | 0.7% | 2026-Q1 |
| FMR LLC added | 155,122 | $5M | 0.6% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 146,221 | $4M | 0.6% | 2026-Q1 |
| CSM Advisors, LLC trimmed | 142,415 | $4M | 0.6% | 2026-Q1 |
| North Star Investment Management Corp. added | 123,350 | $4M | 0.5% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 113,777 | $3M | 0.5% | 2026-Q1 |
| Trexquant Investment LP trimmed | 102,863 | $3M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 90,450 | $3M | 0.4% | 2026-Q1 |
| Alpine Peaks Capital, LP | 88,352 | $3M | 0.4% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 86,518 | $3M | 0.4% | 2026-Q1 |
| Bridge City Capital, LLC added | 82,951 | $2M | 0.3% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 66,470 | $2M | 0.3% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 76,026 | $2M | 0.3% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC added | 75,117 | $2M | 0.3% | 2026-Q1 |
| IRONWOOD INVESTMENT MANAGEMENT LLC trimmed | 74,489 | $2M | 0.3% | 2026-Q1 |
| State of New Jersey Common Pension Fund D added | 69,028 | $2M | 0.3% | 2026-Q1 |
| Quantinno Capital Management LP trimmed | 64,103 | $2M | 0.3% | 2026-Q1 |
| Waverly Advisors, LLC added | 60,193 | $2M | 0.2% | 2026-Q1 |
| CROWN ADVISORS MANAGEMENT, INC. trimmed | 60,000 | $2M | 0.2% | 2026-Q1 |
| CHATHAM CAPITAL GROUP, INC. trimmed | 57,160 | $2M | 0.2% | 2026-Q1 |
| Voleon Capital Management LP trimmed | 53,034 | $2M | 0.2% | 2026-Q1 |
| CITIGROUP INC added | 52,932 | $2M | 0.2% | 2026-Q1 |
| Swiss National Bank | 50,700 | $1M | 0.2% | 2026-Q1 |
| Engineers Gate Manager LP added | 50,568 | $1M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 50,389 | $1M | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 50,026 | $1M | 0.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 46,623 | $1M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 46,368 | $1M | 0.2% | 2026-Q1 |
| RBF Capital, LLC | 45,773 | $1M | 0.2% | 2026-Q1 |
| Boston Partners added | 45,661 | $1M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 44,284 | $1M | 0.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 42,030 | $1M | 0.2% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 40,903 | $1M | 0.2% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 39,795 | $1M | 0.2% | 2026-Q1 |
| Pacific Ridge Capital Partners, LLC added | 38,455 | $1M | 0.2% | 2026-Q1 |
| WILLNER & HELLER, LLC added | 37,903 | $1M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 36,668 | $1M | 0.1% | 2026-Q1 |
| CAPTRUST FINANCIAL ADVISORS trimmed | 36,136 | $1M | 0.1% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 35,100 | $1M | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 34,951 | $1M | 0.1% | 2026-Q1 |
| Corient Private Wealth LLC new | 34,636 | $1M | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 32,635 | $952K | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 32,041 | $935K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 31,163 | $909K | 0.1% | 2026-Q1 |
| Polaris Capital Management, LLC trimmed | 30,800 | $899K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 1,308,991 | $47M | 6.6% | 2025-Q4 stale |
| GW&K Investment Management, LLC added | 514,047 | $19M | 2.6% | 2025-Q4 stale |
| Point72 Asset Management, L.P. trimmed | 253,907 | $9M | 1.3% | 2025-Q4 stale |
| Foundry Partners, LLC trimmed | 151,600 | $6M | 0.9% | 2025-Q1 stale |
| Assenagon Asset Management S.A. added | 123,742 | $5M | 0.8% | 2025-Q3 stale |
| MILLENNIUM MANAGEMENT LLC added | 150,683 | $5M | 0.8% | 2025-Q4 stale |
| 22NW, LP trimmed | 132,452 | $5M | 0.8% | 2025-Q1 stale |
| Manatuck Hill Partners, LLC new | 85,000 | $4M | 0.5% | 2025-Q3 stale |
| 4D Advisors, LLC trimmed | 75,000 | $3M | 0.4% | 2025-Q4 stale |
| Grant/GrossMendelsohn, LLC | 60,040 | $2M | 0.3% | 2025-Q1 stale |
| Hillsdale Investment Management Inc. trimmed | 53,700 | $2M | 0.3% | 2025-Q2 stale |
| CREDIT AGRICOLE S A | 40,213 | $2M | 0.2% | 2025-Q3 stale |
| POLEN CAPITAL MANAGEMENT LLC added | 36,833 | $2M | 0.2% | 2025-Q3 stale |
| AMERICAN CENTURY COMPANIES INC added | 37,923 | $2M | 0.2% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC added | 34,390 | $2M | 0.2% | 2025-Q3 stale |
| AMERIPRISE FINANCIAL INC added | 33,338 | $1M | 0.2% | 2025-Q2 stale |
| SG Americas Securities, LLC trimmed | 35,154 | $1M | 0.2% | 2025-Q4 stale |
| Lombard Odier Asset Management (USA) Corp new | 27,500 | $1M | 0.2% | 2025-Q1 stale |
| Verition Fund Management LLC added | 30,697 | $1M | 0.2% | 2025-Q4 stale |
| BOSUN ASSET MANAGEMENT, LLC added | 26,241 | $1M | 0.2% | 2025-Q2 stale |
| TWO SIGMA ADVISERS, LP added | 30,000 | $1M | 0.2% | 2025-Q4 stale |
| Brooklyn Investment Group new | 27,789 | $1M | 0.1% | 2025-Q4 stale |
| OAK ASSOCIATES LTD /OH/ trimmed | 27,877 | $1M | 0.1% | 2025-Q4 stale |
| SummerHaven Investment Management, LLC added | 24,182 | $1M | 0.1% | 2025-Q2 stale |
| Walleye Capital LLC added | 25,902 | $938K | 0.1% | 2025-Q4 stale |
| MACKENZIE FINANCIAL CORP trimmed | 20,679 | $916K | 0.1% | 2025-Q3 stale |
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.