One Stop Systems
Builds rugged computing, switching and storage systems for AI, sensor and autonomy applications.
$10.62
After-hours close+0.21 (+2.02%)
At close$10.41(−8.04%)
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Breakdown13F · Form 4
Institutions 33.64%8.33M sharesInsiders 5.68%1.41M sharesOther 60.68%15.03M shares
Shares outstanding 24.77M · Float 20.42M · 82.4% free float
Institutions13F, as of Mar 31, 2026
84 holders · 8.33M shares · 27 new positions · 49 increased · 23 reduced · 19 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Vanguard Capital Management LLC | 959.6K | 3.87% | +959.6Knew | May 15, 2026 |
| Jane Street Group, LLC | 874.6K | 3.53% | +270.8K | May 12, 2026 |
| BlackRock, Inc. | 597.3K | 2.41% | +459.9K | May 13, 2026 |
| Bard Associates Inc | 540.7K | 2.18% | −310.2K | May 8, 2026 |
| Morgan Stanley | 431.9K | 1.74% | +369.7K | May 15, 2026 |
| Marshall Wace, LLP | 419.0K | 1.69% | +145.0K | May 15, 2026 |
| UBS Group AG | 407.0K | 1.64% | +400.0K | May 5, 2026 |
| Millennium Management LLC | 400.7K | 1.62% | +359.2K | May 15, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 7.40% | 1.83M | 13G | Jul 29, 2026 ↗ |
| Jane Street Group, LLC | 5.60% | 1.39M | 13G | May 13, 2026 ↗ |
| Barclays PLC | 5.15% | 1.09M | 13G | Mar 21, 2025 ↗ |
| Ramya Rao | 5.15% | 1.09M | 13G | Feb 14, 2025 ↗ |
| Galkin Vladimir | 5.00% | 1.24M | 13G | Jul 24, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Michael Knowles | director, officer: Chief Executive Officer | 607.4K | 2.45% | Jun 12, 2026 |
| James Ison | officer: CPO | 373.1K | 1.51% | Mar 2, 2026 |
| Daniel G. Gabel | officer: Chief Financial Officer | 153.9K | 0.62% | May 28, 2026 |
| Michael J. Dumont | director | 119.8K | 0.48% | May 26, 2026 |
| Gregory W. Matz | director | 78.9K | 0.32% | May 26, 2026 |
| Mitchell H. Herbets | director | 49.0K | 0.20% | May 26, 2026 |
| David George Bassett | director | 25.0K | 0.10% | May 26, 2026 |
1 ten-percent owner holds 3.04M shares by Form 4, outside the officers-and-directors figure above · 13 people have not refiled in the last 18 months (5.17M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| May 26, 2026 | Mitchell H. Herbetsdirector | Sale | 5,000 | $17.62 | 48,984 |
| May 26, 2026 | Gregory W. Matzdirector | Sale | 8,000 | $17.52 | 78,914 |
| May 26, 2026 | David George Bassettdirector | Sale | 8,000 | $17.64 | 24,984 |
CongressHouse and Senate disclosures
Not reported.