ONE STOP SYS INC OSS
COM · Common Stock · CUSIP 68247W109
American computer company
- SectorTechnology
- IndustryElectronic Computers
- HeadquartersEscondido, CA
- Founded1998
- Websiteonestopsystems.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 24.9m as of 2026-06-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $18.15. Options: 8 managers hold calls ($28.3m notional), 8 hold puts ($31.8m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 28 |
| Q4 2022 | 26 |
| Q1 2023 | 27 |
| Q2 2023 | 27 |
| Q3 2023 | 27 |
| Q4 2023 | 30 |
| Q1 2024 | 26 |
| Q2 2024 | 35 |
| Q3 2024 | 28 |
| Q4 2024 | 38 |
| Q1 2025 | 34 |
| Q2 2025 | 40 |
| Q3 2025 | 59 |
| Q4 2025 | 69 |
| Q1 2026 | 77 |
| Q2 2026 | 108 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 8 | 17 |
| Q4 2024 | 22 | 10 |
| Q1 2025 | 20 | 15 |
| Q2 2025 | 23 | 15 |
| Q3 2025 | 43 | 18 |
| Q4 2025 | 45 | 27 |
| Q1 2026 | 45 | 39 |
| Q2 2026 | 77 | 42 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $638.1k | $783.3k | 1.23 |
| Q4 2025 | $3.3m | $886.0k | 0.26 |
| Q1 2026 | $8.5m | $4.2m | 0.49 |
| Q2 2026 | $28.3m | $31.8m | 1.12 |
Biggest buyers
| BlackRock, Inc. | Added | +1.2m |
| JANE STREET GROUP, LLC | Added | +434.9k |
| Palisades Investment Partners, LLC | New | +414.4k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +320.5k |
| Qube Research & Technologies Ltd | New | +318.9k |
| STATE STREET CORP | Added | +282.6k |
| TWO SIGMA INVESTMENTS, LP | New | +162.2k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New | +155.4k |
| Cambridge Investment Research Advisors, Inc. | Added | +153.0k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +147.9k |
Biggest sellers
| MARSHALL WACE, LLP | Sold out | -419.0k |
| MORGAN STANLEY | Reduced | -343.0k |
| UBS Group AG | Reduced | -334.8k |
| CITADEL ADVISORS LLC | Reduced | -285.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold out | -236.3k |
| DNB Asset Management AS | Reduced | -134.0k |
| Trexquant Investment LP | Reduced | -119.4k |
| SEI INVESTMENTS CO | Reduced | -82.2k |
| HRT FINANCIAL LP | Sold out | -79.0k |
| THOMPSON SIEGEL & WALMSLEY LLC | Reduced | -65.2k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.8m376.5k shares |
| CITADEL ADVISORS LLC | Added | $5.1m279.7k shares |
| IMC-Chicago, LLC | Added | $4.9m268.4k shares |
| PEAK6 LLC | New | $3.6m199.7k shares |
| JANE STREET GROUP, LLC | Added | $3.3m180.2k shares |
| GROUP ONE TRADING LLC | Reduced | $2.2m123.6k shares |
| SIMPLEX TRADING, LLC | Reduced | $1.5m82.6k shares |
| Point72 Asset Management, L.P. | Added | $874.5k48.1k shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $14.9m822.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $7.7m424.6k shares |
| IMC-Chicago, LLC | Added | $2.3m128.1k shares |
| GROUP ONE TRADING LLC | Added | $2.1m117.4k shares |
| JANE STREET GROUP, LLC | Reduced | $2.1m115.6k shares |
| SIMPLEX TRADING, LLC | Added | $1.5m83.8k shares |
| LMR Partners LLP | New | $619.9k34.1k shares |
| Point72 Asset Management, L.P. | New | $390.9k21.5k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution new · filed 2026-07-29 | 7.4% |
| JANE STREET GROUP, LLC 13G · passive investor new · filed 2026-05-13 | 5.6% |
Fell to 5% or below in the last year: Galkin Vladimir (0.8%, 2026-10-09), Lynrock Lake LP (2.7%, 2026-02-17), BARD ASSOCIATES INC (2.2%, 2026-02-13)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 3 | $369.4k | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-05-26 | BASSETT DAVID GEORGE Director | Sold | $141.1k8.0k shares |
| 2026-05-26 | Matz Gregory W Director | Sold | $140.2k8.0k shares |
| 2026-05-26 | Herbets Mitchell H Director | Sold | $88.1k5.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 1.8m $33.4m | Added +1.2m |
| JANE STREET GROUP, LLC 0.02% of their portfolio | 1.3m $23.8m | Added +434.9k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 974.6k $17.7m | Added +15.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 572.9k $10.4m | Added +320.5k |
| BARD ASSOCIATES INC 2.12% of their portfolio | 526.4k $9.6m | Reduced -14.3k |
| Palisades Investment Partners, LLC 2.14% of their portfolio | 414.4k $7.5m | New |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 407.9k $7.4m | Added +147.9k |
| STATE STREET CORP 0.00% of their portfolio | 384.3k $7.0m | Added +282.6k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 337.7k $6.1m | Reduced -63.0k |
| Qube Research & Technologies Ltd 0.01% of their portfolio | 318.9k $5.8m | New |
| Cambridge Investment Research Advisors, Inc. 0.01% of their portfolio | 298.6k $5.4m | Added +153.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 178.1k $3.2m | Added +131.1k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 162.2k $2.9m | New |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 157.4k $2.9m | Added +28.6k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 155.4k $2.8m | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 147.3k $2.7m | New |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 146.9k $2.7m | New |
| Squarepoint Ops LLC 0.00% of their portfolio | 131.3k $2.4m | Added +72.9k |
| Informed Momentum Co LLC 0.21% of their portfolio | 130.6k $2.4m | Reduced -5.4k |
| DNB Asset Management AS 0.01% of their portfolio | 118.8k $2.2m | Reduced -134.0k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 99.3k $1.8m | Added +25.4k |
| Trexquant Investment LP 0.01% of their portfolio | 98.4k $1.8m | Reduced -119.4k |
| MORGAN STANLEY 0.00% of their portfolio | 88.9k $1.6m | Reduced -343.0k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 86.5k $1.6m | Added +84.9k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 84.4k $1.5m | Reduced -82.2k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 75.3k $1.4m | Reduced -1.7k |
| Eddie Patel Inc 0.79% of their portfolio | 72.9k $1.3m | Added +5.8k |
| UBS Group AG 0.00% of their portfolio | 72.2k $1.3m | Reduced -334.8k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 71.2k $1.3m | Reduced -285.5k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 66.6k $1.2m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 65.3k $1.2m | Added +52.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 62.5k $1.1m | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 61.9k $1.1m | New |
| CITIGROUP INC 0.00% of their portfolio | 55.0k $999.1k | Reduced -20.7k |
| LPL Financial LLC 0.00% of their portfolio | 54.2k $985.8k | New |
| SG Americas Securities, LLC 0.00% of their portfolio | 47.0k $855.0k | Added +19.0k |
| Engineers Gate Manager LP 0.01% of their portfolio | 41.7k $758.7k | Added +12.7k |
| Penbrook Management LLC 0.45% of their portfolio | 38.9k $706.7k | Reduced -7.9k |
| Polymer Capital Management (HK) LTD 0.07% of their portfolio | 38.0k $690.8k | New |
| Inspire Investing, LLC 0.03% of their portfolio | 38.0k $690.2k | New |
| Nuveen, LLC 0.00% of their portfolio | 36.3k $660.1k | New |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 32.9k $598.5k | Reduced -5.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 32.2k $584.5k | Added +8.9k |
| Calamos Advisors LLC 0.00% of their portfolio | 32.0k $581.3k | New |
| THOMPSON SIEGEL & WALMSLEY LLC 0.01% of their portfolio | 31.8k $578.0k | Reduced -65.2k |
| Optimus Capital Advisors, LLC 0.29% of their portfolio | 30.0k $545.4k | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 27.9k $506.7k | New |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 27.3k $495.0k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 26.8k $486.9k | Added +25.8k |
| CANTOR FITZGERALD, L. P. 0.00% of their portfolio | 26.1k $474.5k | New |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.06% of their portfolio | 25.7k $466.8k | Reduced -9.9k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 22.3k $406.3k | New |
| FOX RUN MANAGEMENT, L.L.C. 0.07% of their portfolio | 22.2k $403.7k | New |
| BAKER TILLY WEALTH MANAGEMENT, LLC 0.08% of their portfolio | 20.0k $363.6k | Unchanged |
| Lodestone Wealth Management LLC 0.13% of their portfolio | 19.6k $357.0k | Added +12.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 18.4k $336.0k | New |
| OCCUDO QUANTITATIVE STRATEGIES LP 0.02% of their portfolio | 18.1k $329.4k | Added +4.4k |
| Caitong International Asset Management Co., Ltd 0.04% of their portfolio | 17.3k $315.2k | Added +13.7k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 16.8k $127.4k | New |
| Apollon Wealth Management, LLC 0.00% of their portfolio | 16.2k $294.4k | Reduced -4.8k |
| Savant Capital, LLC 0.00% of their portfolio | 16.0k $206.0k | New |
| State of Wyoming 0.03% of their portfolio | 15.4k $280.4k | New |
| BARCLAYS PLC 0.00% of their portfolio | 14.7k $266.9k | Reduced -5.8k |
| Clear Street Group Inc. 0.00% of their portfolio | 14.2k $259.1k | New |
| Cornerstone Investment Partners, LLC 0.01% of their portfolio | 14.2k $258.5k | New |
| Marex Group Ltd 0.00% of their portfolio | 13.7k $249.1k | New |
| MetLife Investment Management, LLC 0.00% of their portfolio | 13.3k $242.6k | New |
| LMR Partners LLP 0.00% of their portfolio | 12.6k $228.5k | New |
| Invesco Ltd. 0.00% of their portfolio | 12.2k $222.0k | New |
| McAdam, LLC 0.01% of their portfolio | 12.2k $221.8k | Reduced -548 |
| Brevan Howard Capital Management LP 0.00% of their portfolio | 12.2k $221.2k | Reduced -31.0k |
| Total Clarity Wealth Management, Inc. 0.04% of their portfolio | 11.5k $209.0k | New |
| Spark Investment Management LLC 0.40% of their portfolio | 11.4k $207.3k | New |
| CHOREO, LLC 0.00% of their portfolio | 11.3k $205.5k | Unchanged |
| Connective Capital Management, LLC 0.14% of their portfolio | 11.2k $203.6k | New |
| HighTower Advisors, LLC 0.00% of their portfolio | 10.4k $188.4k | New |
| Strait & Sound Wealth Management LLC 0.06% of their portfolio | 10.0k $181.8k | Reduced -1.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 9.3k $154.4k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 7.9k $143.3k | Reduced -2.9k |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 6.6k $120.5k | New |
| Quantbot Technologies LP 0.00% of their portfolio | 6.1k $110.6k | New |
| STRS OHIO 0.00% of their portfolio | 4.4k $80.0k | New |
| Global Retirement Partners, LLC 0.00% of their portfolio | 4.0k $72.7k | First filing |
| Smartleaf Asset Management LLC 0.00% of their portfolio | 4.0k $66.3k | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 3.9k $70.9k | Added +1.9k |
| NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio | 3.5k $63.6k | New |
| NewEdge Advisors, LLC 0.00% of their portfolio | 2.5k $45.5k | Reduced -520 |
| Legal & General Group Plc 0.00% of their portfolio | 2.2k $39.5k | New |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 2.0k $37.1k | New |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 1.5k $27.3k | New |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 1.5k $23.8k | Added +1.3k |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 1.4k $24.9k | Added +1.4k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.3k $24.4k | Reduced -3.4k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 1.3k $24.0k | Added +763 |
| FMR LLC 0.00% of their portfolio | 996 $18.1k | Added +940 |
| Lynrock Lake LP 0.00% of their portfolio | 666 $12.1k | Unchanged |
| Hurley Capital, LLC 0.01% of their portfolio | 622 $11.3k | Unchanged |
| Founders Capital Management 0.00% of their portfolio | 600 $10.9k | New |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 594 $10.8k | Added +394 |
| Arax Advisory Partners 0.00% of their portfolio | 546 $9.9k | Reduced -1.9k |