One Stop Systems
OSS · NASDAQ
$6.06−$0.02 (−0.33%)TodayMarket closed ·
Prev close $6.08
Who owns OSS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 41.4% of OSS’s shares.
- Cooper (Steve D)7.8%
- BlackRock Institutional Trust Company, N.A.6.9%
- Galkin (Vladimir)6.1%
- Jane Street Capital, L.L.C.5.3%
- Next 6 largest institutions15.4%
- All other shareholders58.6%
| Holder | Shares | % of shares |
|---|---|---|
| Cooper (Steve D) | 1.92M | 7.78% |
| BlackRock Institutional Trust Company, N.A. | 1.71M | 6.89% |
| Galkin (Vladimir) | 1.50M | 6.06% |
| Jane Street Capital, L.L.C. | 1.31M | 5.29% |
| Vanguard Capital Management, LLC | 974.57K | 3.94% |
| Horton Capital Management LLC | 917.34K | 3.71% |
| Geode Capital Management, L.L.C. | 572.92K | 2.32% |
| Bard Associates Inc. | 526.37K | 2.13% |
| Palisades Investment Partners, LLC | 414.39K | 1.67% |
| Renaissance Technologies LLC | 407.86K | 1.65% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 693.56K | 2.80% |
| iShares Russell 2000 ETF | 641.48K | 2.59% |
| Vanguard Extended Market Index Fund | 252.09K | 1.02% |
| Fidelity Small Cap Index Fund | 244.06K | 0.99% |
| Calamos Timpani Small Cap Growth Fund | 225.78K | 0.91% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $369.38K (3 trades) of OSS on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| KNOWLES MICHAEL | Tax withholding | 8.62K | $117.33K |
| KNOWLES MICHAEL | Tax withholding | 8.62K | $114.83K |
| Gabel Daniel G. | Tax withholding | 3.83K | $51.04K |
| KNOWLES MICHAEL | Tax withholding | 19.68K | $332.31K |
| BASSETT DAVID GEORGE | Sale | 8.00K | $141.12K |
| Matz Gregory W | Sale | 8.00K | $140.16K |
| Herbets Mitchell H | Sale | 5.00K | $88.10K |
| BASSETT DAVID GEORGE | Award | 11.98K | — |
| Matz Gregory W | Award | 11.98K | — |
| Dumont Michael J. | Award | 11.98K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.48M
- Days to cover
- 6.97
- % of shares outstanding
- 18.11%
- Average daily volume
- 643.19K
- Change since last report
- −4.7%
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