OSSNasdaqElectronic ComputersFiscal year ends December 31
ONE STOP SYSTEMS, INC.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 5, 2026
$6.08+0.13 (+2.18%)
Close on Oct 19, 2026
- Market cap
- $151.04M
- P/E (TTM)
- 304.0
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
43.4%
11M of 25M shares
Institutional holders
108
51 new, 19 sold out
Net institutional buying
2M
In Q2 2026
Insider trades, 12 months
0 buys · 3 sales
Net sold $369.38K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 1,833,734 | 7.40% | 13G (passive) | Jun 30, 2026 |
| Galkin Vladimir | 1,500,000 | 6.10% | 13G (passive) amendment | Jul 31, 2026 |
| Jane Street Group, LLC | 1,388,714 | 5.60% | 13G (passive) | May 7, 2026 |
| Ramya Rao | 1,087,112 | 5.15% | 13G (passive) | Dec 31, 2024 |
| Barclays PLC | – | – | 13G (passive) amendment | Mar 31, 2025 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of OSS | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 1,837,840 | 7.37% | $33.41M | +1,240,537 | 0.00% |
| Jane Street Group, LLC | 1,309,455 | 5.25% | $23.81M | +434,897 | 0.00% |
| Vanguard Capital Management LLC | 974,568 | 3.91% | $17.72M | +14,980 | 0.00% |
| Geode Capital Management, LLC | 572,918 | 2.30% | $10.42M | +320,465 | 0.00% |
| Bard Associates Inc | 526,370 | 2.11% | $9.57M | −14,296 | 2.12% |
| Palisades Investment Partners, LLC | 414,392 | 1.66% | $7.53M | New | 2.14% |
| Renaissance Technologies LLC | 407,860 | 1.64% | $7.41M | +147,900 | 0.01% |
| State Street Corp | 384,259 | 1.54% | $6.99M | +282,583 | 0.00% |
| Millennium Management LLC | 337,710 | 1.35% | $6.14M | −63,019 | 0.00% |
| Qube Research & Technologies Ltd | 318,919 | 1.28% | $5.80M | New | 0.01% |
| Cambridge Investment Research Advisors, Inc. | 298,584 | 1.20% | $5.43K | +152,960 | 0.01% |
| Northern Trust Corp | 178,101 | 0.71% | $3.24M | +131,127 | 0.00% |
| Two Sigma Investments, LP | 162,193 | 0.65% | $2.95M | New | 0.00% |
| Vanguard Fiduciary Trust Co | 157,365 | 0.63% | $2.86M | +28,606 | 0.00% |
| Vanguard Portfolio Management LLC | 155,408 | 0.62% | $2.83M | New | 0.00% |
| New York State Common Retirement Fund | 147,343 | 0.59% | $2.68M | New | 0.00% |
| Dimensional Fund Advisors LP | 146,871 | 0.59% | $2.67M | New | 0.00% |
| Squarepoint Ops LLC | 131,346 | 0.53% | $2.39M | +72,870 | 0.00% |
| EAM Investors, LLC | 130,568 | 0.52% | $2.37M | −5,421 | 0.21% |
| DnB Asset Management AS | 118,759 | 0.48% | $2.16M | −133,974 | 0.01% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 108 | 11M | 43.4% | 51 / 27 | 24 / 19 | 5M | 3M |
| Q1 2026 | 77 | 8M | 33.4% | 27 / 22 | 22 / 18 | 4M | 4M |
| Q4 2025 | 69 | 9M | 37.3% | 22 / 25 | 17 / 10 | 3M | 3M |
| Q3 2025 | 59 | 10M | 39.0% | 26 / 17 | 12 / 6 | 4M | 1M |
| Q2 2025 | 39 | 6M | 25.8% | 10 / 13 | 11 / 4 | 1M | 0M |
| Q1 2025 | 33 | 5M | 21.3% | 4 / 16 | 7 / 8 | 0M | 0M |
| Q4 2024 | 37 | 5M | 21.2% | 12 / 11 | 8 / 2 | 0M | 0M |
| Q3 2024 | 27 | 5M | 20.3% | 2 / 7 | 9 / 8 | 0M | 1M |
| Q2 2024 | 34 | 5M | 22.0% | 10 / 13 | 6 / 1 | 0M | 0M |
| Q1 2024 | 25 | 5M | 21.8% | 4 / 9 | 7 / 8 | 0M | 0M |
| Q4 2023 | 29 | 6M | 22.6% | 5 / 7 | 8 / 2 | 0M | 0M |
| Q3 2023 | 26 | 6M | 22.4% | 6 / 7 | 7 / 6 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of OSS | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 693,556 | 2.78% | $12.61M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 577,041 | 2.31% | $10.49M | 0.01% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 257,191 | 1.03% | $4.68M | 0.00% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 246,478 | 0.99% | $3.01M | 0.01% | Jul 31, 2026 |
| iShares Russell 2000 Growth ETF | 211,025 | 0.85% | $3.84M | 0.02% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 113,847 | 0.46% | $2.07M | 0.00% | May 31, 2026 |
| iShares Micro-Cap ETF | 74,788 | 0.30% | $1.36M | 0.09% | Jun 30, 2026 |
| Schwab Small-Cap Index Fund | 55,360 | 0.22% | $677.05K | 0.01% | Jul 31, 2026 |
| Dimensional U.S. Small Cap ETF | 45,816 | 0.18% | $560.33K | 0.00% | Jul 31, 2026 |
| Master Small Cap Index Series | 42,003 | 0.17% | $763.61K | 0.01% | Jun 30, 2026 |
| Fidelity Total Market Index Fund | 40,247 | 0.16% | $731.69K | 0.00% | May 31, 2026 |
| U.S. Small Cap Portfolio | 36,302 | 0.15% | $443.97K | 0.00% | Jul 31, 2026 |
| Goldman Sachs Small Cap Equity Insights Fund | 35,029 | 0.14% | $428.40K | 0.04% | Jul 31, 2026 |
| Fidelity Series Total Market Index Fund | 33,246 | 0.13% | $604.41K | 0.00% | May 31, 2026 |
| Nuveen Small Cap Blend Index Fund | 29,810 | 0.12% | $364.58K | 0.01% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Michael Knowles | Chief Executive Officer, Director | 590,141 | 2.37% | Sep 4, 2026 |
| Daniel G. Gabel | Chief Financial Officer | 150,064 | 0.60% | Sep 4, 2026 |
| James Ison | CPO | 377,318 | 1.51% | Mar 2, 2026 |
| John W. Morrison Jr. | Chief Financial Officer | 305,381 | 1.22% | Nov 12, 2024 |
| Gregory W. Matz | Director | 81,414 | 0.33% | May 26, 2026 |
| Michael J. Dumont | Director | 206,682 | 0.83% | May 26, 2026 |
| Mitchell H. Herbets | Director | 48,984 | 0.20% | May 26, 2026 |
| David George Bassett | Director | 24,984 | 0.10% | May 26, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Michael Knowles Chief Executive Officer, Director | Aug 15, 2026 | Tax withholding | −8,621 | $13.61 | $117.33K | 590,141 |
| Michael Knowles Chief Executive Officer, Director | Aug 7, 2026 | Tax withholding | −8,621 | $13.32 | $114.83K | 598,762 |
| Daniel G. Gabel Chief Financial Officer | Aug 7, 2026 | Tax withholding | −3,832 | $13.32 | $51.04K | 150,064 |
| Michael Knowles Chief Executive Officer, Director | Jun 5, 2026 | Tax withholding | −19,675 | $16.89 | $332.31K | 607,383 |
| Mitchell H. Herbets Director | May 26, 2026 | Sale | −5,000 | $17.62 | $88.10K | 48,984 |
| Gregory W. Matz Director | May 26, 2026 | Sale | −8,000 | $17.52 | $140.16K | 78,914 |
| David George Bassett Director | May 26, 2026 | Sale | −8,000 | $17.64 | $141.12K | 24,984 |
| Mitchell H. Herbets Director | May 20, 2026 | Award | +11,984 | – | – | 53,984 |
| Michael J. Dumont Director | May 20, 2026 | Award | +11,984 | – | – | 119,833 |
| Gregory W. Matz Director | May 20, 2026 | Award | +11,984 | – | – | 86,914 |
| David George Bassett Director | May 20, 2026 | Award | +11,984 | – | – | 32,984 |
| Daniel G. Gabel Chief Financial Officer | May 11, 2026 | Tax withholding | −1,613 | $15.68 | $25.29K | 153,896 |
| Michael Knowles Chief Executive Officer, Director | Feb 15, 2026 | Tax withholding | −6,650 | $8.70 | $57.85K | 648,058 |
| James Ison CPO | Feb 15, 2026 | Tax withholding | −3,120 | $8.70 | $27.14K | 146,170 |
| James Ison CPO | Feb 15, 2026 | Gift | +4,263 | – | – | 231,148 |
| James Ison CPO | Feb 15, 2026 | Gift | −4,263 | – | – | 141,907 |
| Daniel G. Gabel Chief Financial Officer | Feb 7, 2026 | Tax withholding | −7,799 | $9.24 | $72.06K | 155,509 |
| Michael Knowles Chief Executive Officer, Director | Feb 7, 2026 | Tax withholding | −13,298 | $9.24 | $122.87K | 654,708 |
| James Ison CPO | Feb 7, 2026 | Tax withholding | −6,546 | $9.24 | $60.49K | 149,290 |
| James Ison CPO | Feb 7, 2026 | Gift | −8,213 | – | – | 141,077 |
| James Ison CPO | Feb 7, 2026 | Gift | +8,213 | – | – | 226,885 |
| James Ison CPO | Feb 7, 2026 | Award | +34,313 | – | – | 155,836 |
| Daniel G. Gabel Chief Financial Officer | Feb 7, 2026 | Award | +55,239 | – | – | 163,308 |
| Michael Knowles Chief Executive Officer, Director | Feb 7, 2026 | Award | +101,862 | – | – | 668,006 |
| Daniel G. Gabel Chief Financial Officer | Dec 31, 2025 | Tax withholding | −3,215 | $7.18 | $23.08K | 108,069 |
| Michael Knowles Chief Executive Officer, Director | Dec 31, 2025 | Tax withholding | −19,075 | $7.18 | $136.96K | 566,144 |
| Michael Knowles Chief Executive Officer, Director | Aug 20, 2025 | Tax withholding | −8,359 | $5.26 | $43.97K | 585,219 |
| James Ison CPO | Aug 20, 2025 | Tax withholding | −3,113 | $5.26 | $16.37K | 125,794 |
| James Ison CPO | Aug 20, 2025 | Gift | −4,271 | – | – | 121,523 |
| James Ison CPO | Aug 20, 2025 | Gift | +4,271 | – | – | 218,672 |
| Michael Knowles Chief Executive Officer, Director | Jun 5, 2025 | Tax withholding | −19,075 | $3.06 | $58.37K | 593,578 |
| David George Bassett Director | May 21, 2025 | Award | +21,000 | – | – | 21,000 |
| Michael Knowles Chief Executive Officer, Director | May 21, 2025 | Award | +0 | – | – | 591,653 |
| Michael Knowles Chief Executive Officer, Director | May 21, 2025 | Award | +21,000 | – | – | 612,653 |
| Mitchell H. Herbets Director | May 21, 2025 | Award | +21,000 | – | – | 42,000 |
| Michael J. Dumont Director | May 21, 2025 | Tax withholding | +21,000 | – | – | 21,000 |
| Gregory W. Matz Director | May 21, 2025 | Award | +21,000 | – | – | 74,930 |
| Michael Knowles Chief Executive Officer, Director | Feb 20, 2025 | Tax withholding | −16,800 | $3.76 | $63.17K | 591,653 |
| James Ison CPO | Feb 20, 2025 | Gift | +7,760 | – | – | 214,401 |
| James Ison CPO | Feb 20, 2025 | Tax withholding | −7,006 | $3.76 | $26.34K | 136,667 |
| James Ison CPO | Feb 20, 2025 | Gift | −7,760 | – | – | 128,907 |
| Michael Knowles Chief Executive Officer, Director | Feb 7, 2025 | Award | +131,448 | $4.06 | $533.68K | 608,453 |
| Daniel G. Gabel Chief Financial Officer | Feb 7, 2025 | Award | +71,284 | $4.06 | $289.41K | 111,284 |
| James Ison CPO | Feb 7, 2025 | Award | +44,279 | $4.06 | $179.77K | 135,913 |
| Daniel G. Gabel Chief Financial Officer | Nov 11, 2024 | Award | +40,000 | – | – | 40,000 |
| James Ison CPO | Sep 23, 2024 | Gift | −8,227 | – | – | 91,634 |
| James Ison CPO | Sep 23, 2024 | Tax withholding | −4,440 | $2.19 | $9.72K | 99,861 |
| James Ison CPO | Sep 23, 2024 | Gift | +8,227 | – | – | 206,641 |
| John W. Morrison Jr. Chief Financial Officer | Sep 23, 2024 | Tax withholding | −5,961 | $2.19 | $13.05K | 305,381 |
| John W. Morrison Jr. Chief Financial Officer | Aug 20, 2024 | Tax withholding | −4,059 | $2.16 | $8.77K | 311,342 |
| James Ison CPO | Aug 20, 2024 | Tax withholding | −3,271 | $2.16 | $7.07K | 110,363 |
| James Ison CPO | Aug 20, 2024 | Gift | +6,062 | – | – | 198,414 |
| James Ison CPO | Aug 20, 2024 | Gift | −6,062 | – | – | 104,301 |
| Joseph M. Manko Jr. Director | Aug 14, 2024 | Buy | +25,000 | $1.99 | $49.75K | 1,174,899 |
| Joseph M. Manko Jr. Director | Aug 13, 2024 | Buy | +50,000 | $1.94 | $97.00K | 1,149,899 |
| Kenneth F. Potashner Director | Jul 9, 2024 | Option exercise | +40,000 | $0.46 | $18.40K | 398,601 |
| John W. Morrison Jr. Chief Financial Officer | Jul 1, 2024 | Award | +71,300 | – | – | 315,401 |
| Michael J. Dumont Director | Jul 1, 2024 | Award | +21,000 | – | – | 21,000 |
| Gioia Messinger Director | Jul 1, 2024 | Award | +21,000 | – | – | 49,690 |
| Michael Knowles Chief Executive Officer, Director | Jul 1, 2024 | Award | +131,450 | – | – | 494,530 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| David George Bassett Director | May 26, 2026 | 8,000 | $142.88K | May 26, 2026 | Restricted Stock Units |
| Herbets Mitchell Director | May 26, 2026 | 5,000 | $88.13K | May 26, 2026 | Restricted stock vesting under a registered plan |
| Gregory W. Matz Director | May 26, 2026 | 8,000 | $137.76K | May 26, 2026 | Stock Award |