Who owns One Stop Systems (OSS)
Which tracked institutional funds hold OSS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OSS 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.
How the tape is positioned
The tracked-fund tape on OSS is one-sided between 2026-Q1 and 2026-Q2: 42 added or opened and 8 trimmed or exited — on balance accumulating.
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
OSS’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 OSS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in OSS 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, across 103 tracked filers holding OSS, 75 increased or opened the position and 46 reduced or closed it; 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
Funds opening or closing a position in OSS between the 2026-Q1 and 2026-Q2 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 16
- Palisades Investment Partners, LLC$8M
- Qube Research & Technologies Ltd$6M
- TWO SIGMA INVESTMENTS, LP$3M
- VANGUARD PORTFOLIO MANAGEMENT LLC$3M
- NEW YORK STATE COMMON RETIREMENT FUND$3M
- DIMENSIONAL FUND ADVISORS LP$3M
Full exits 5
- MARSHALL WACE, LLP$3M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$2M
- Cambridge Investment Research Advisors, Inc.$1M
- THOMPSON SIEGEL & WALMSLEY LLC$734K
- HRT FINANCIAL LP$598K
Largest adds
- BlackRock, Inc.$29M
- JANE STREET GROUP, LLC$17M
- VANGUARD CAPITAL MANAGEMENT LLC$10M
- GEODE CAPITAL MANAGEMENT, LLC$9M
- STATE STREET CORP$6M
- BARD ASSOCIATES INC$5M
Largest trims
- UBS Group AG$2M
- MORGAN STANLEY$2M
- CITADEL ADVISORS LLC$1M
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. added | 1,837,840 | $33M | 17.7% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 1,309,455 | $24M | 12.6% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 974,568 | $18M | 9.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 572,918 | $10M | 5.5% | 2026-Q2 |
| BARD ASSOCIATES INC trimmed | 526,370 | $10M | 5.1% | 2026-Q2 |
| Palisades Investment Partners, LLC new | 414,392 | $8M | 4.0% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 407,860 | $7M | 3.9% | 2026-Q2 |
| STATE STREET CORP added | 384,259 | $7M | 3.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 337,710 | $6M | 3.3% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 318,919 | $6M | 3.1% | 2026-Q2 |
| NORTHERN TRUST CORP added | 178,101 | $3M | 1.7% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 162,193 | $3M | 1.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 157,365 | $3M | 1.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 155,408 | $3M | 1.5% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND new | 147,343 | $3M | 1.4% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 146,871 | $3M | 1.4% | 2026-Q2 |
| Squarepoint Ops LLC added | 131,346 | $2M | 1.3% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 130,568 | $2M | 1.3% | 2026-Q2 |
| DNB Asset Management AS trimmed | 118,759 | $2M | 1.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 99,272 | $2M | 1.0% | 2026-Q2 |
| Trexquant Investment LP trimmed | 98,442 | $2M | 0.9% | 2026-Q2 |
| MORGAN STANLEY trimmed | 88,902 | $2M | 0.9% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 86,513 | $2M | 0.8% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 84,393 | $2M | 0.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 75,306 | $1M | 0.7% | 2026-Q2 |
| Eddie Patel Inc added | 72,895 | $1M | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 72,184 | $1M | 0.7% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 71,202 | $1M | 0.7% | 2026-Q2 |
| Russell Investments Group, Ltd. new | 66,596 | $1M | 0.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 65,276 | $1M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp new | 62,473 | $1M | 0.6% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC new | 61,924 | $1M | 0.6% | 2026-Q2 |
| CITIGROUP INC trimmed | 54,956 | $999K | 0.5% | 2026-Q2 |
| LPL Financial LLC new | 54,225 | $986K | 0.5% | 2026-Q2 |
| Engineers Gate Manager LP added | 41,732 | $759K | 0.4% | 2026-Q2 |
| Penbrook Management LLC trimmed | 38,875 | $707K | 0.4% | 2026-Q2 |
| Polymer Capital Management (HK) LTD new | 38,000 | $691K | 0.4% | 2026-Q2 |
| Inspire Investing, LLC new | 37,967 | $690K | 0.4% | 2026-Q2 |
| Nuveen, LLC new | 36,308 | $660K | 0.4% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 32,920 | $598K | 0.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 32,151 | $585K | 0.3% | 2026-Q2 |
| Calamos Advisors LLC new | 31,973 | $581K | 0.3% | 2026-Q2 |
| Optimus Capital Advisors, LLC new | 30,000 | $545K | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS new | 27,871 | $507K | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 26,784 | $487K | 0.3% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC trimmed | 25,674 | $467K | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ new | 22,348 | $406K | 0.2% | 2026-Q2 |
| FOX RUN MANAGEMENT, L.L.C. new | 22,208 | $404K | 0.2% | 2026-Q2 |
| BAKER TILLY WEALTH MANAGEMENT, LLC | 20,000 | $364K | 0.2% | 2026-Q2 |
| Lodestone Wealth Management LLC added | 19,637 | $357K | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ new | 18,450 | $336K | 0.2% | 2026-Q2 |
| OCCUDO QUANTITATIVE STRATEGIES LP added | 18,117 | $329K | 0.2% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd added | 17,337 | $315K | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. new | 16,830 | $127K | 0.1% | 2026-Q2 |
| Apollon Wealth Management, LLC trimmed | 16,195 | $294K | 0.2% | 2026-Q2 |
| Savant Capital, LLC added | 16,000 | $206K | 0.1% | 2026-Q2 |
| State of Wyoming new | 15,423 | $280K | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 14,679 | $267K | 0.1% | 2026-Q2 |
| Clear Street Group Inc. new | 14,250 | $259K | 0.1% | 2026-Q2 |
| Cornerstone Investment Partners, LLC new | 14,218 | $258K | 0.1% | 2026-Q2 |
| Marex Group Ltd trimmed | 13,700 | $249K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC new | 13,347 | $243K | 0.1% | 2026-Q2 |
| CANTOR FITZGERALD, L. P. new | 13,049 | $237K | 0.1% | 2026-Q2 |
| LMR Partners LLP new | 12,571 | $229K | 0.1% | 2026-Q2 |
| Invesco Ltd. new | 12,209 | $222K | 0.1% | 2026-Q2 |
| McAdam, LLC trimmed | 12,198 | $222K | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP trimmed | 12,168 | $221K | 0.1% | 2026-Q2 |
| Total Clarity Wealth Management, Inc. new | 11,494 | $209K | 0.1% | 2026-Q2 |
| Spark Investment Management LLC new | 11,400 | $207K | 0.1% | 2026-Q2 |
| CHOREO, LLC | 11,306 | $206K | 0.1% | 2026-Q2 |
| Connective Capital Management, LLC new | 11,198 | $204K | 0.1% | 2026-Q2 |
| Strait & Sound Wealth Management LLC trimmed | 10,000 | $182K | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 9,315 | $154K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 7,884 | $143K | 0.1% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey new | 6,627 | $120K | 0.1% | 2026-Q2 |
| Quantbot Technologies LP new | 6,082 | $111K | 0.1% | 2026-Q2 |
| STRS OHIO new | 4,400 | $80K | 0.0% | 2026-Q2 |
| Global Retirement Partners, LLC new | 4,000 | $73K | 0.0% | 2026-Q2 |
| Smartleaf Asset Management LLC | 4,000 | $66K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 3,899 | $71K | 0.0% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ new | 3,500 | $64K | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC new | 2,500 | $45K | 0.0% | 2026-Q2 |
| Legal & General Group Plc new | 2,172 | $39K | 0.0% | 2026-Q2 |
| Ameritas Investment Partners, Inc. new | 2,039 | $37K | 0.0% | 2026-Q2 |
| Farther Finance Advisors, LLC new | 1,500 | $27K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 1,465 | $24K | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. added | 1,372 | $25K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) trimmed | 1,340 | $24K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 1,315 | $24K | 0.0% | 2026-Q2 |
| FMR LLC added | 996 | $18K | 0.0% | 2026-Q2 |
| Lynrock Lake LP | 666 | $12K | 0.0% | 2026-Q2 |
| Hurley Capital, LLC | 622 | $11K | 0.0% | 2026-Q2 |
| Founders Capital Management new | 600 | $11K | 0.0% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC added | 594 | $11K | 0.0% | 2026-Q2 |
| Arax Advisory Partners trimmed | 546 | $10K | 0.0% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO new | 481 | $9K | 0.0% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM new | 309 | $6K | 0.0% | 2026-Q2 |
| Strive Financial Group ,LLC | 100 | $2K | 0.0% | 2026-Q2 |
| Parallel Advisors, LLC new | 100 | $2K | 0.0% | 2026-Q2 |
| Sterling Capital Management LLC new | 79 | $1K | 0.0% | 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.