One Stop Systems Inc
Ownership
Ownership Structure
Who owns One Stop Systems Inc (OSS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 82.6% of the shares are freely tradable; institutional investors hold 41.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Capital Management, LLC | 3.85 | 959,588 | +0.0 | 03/31/2026 |
| Jane Street Group LLC | 3.51 | 874,558 | +44.8 | 03/31/2026 |
| BlackRock Inc | 2.39 | 597,303 | +334.6 | 03/31/2026 |
| Bard Associates Inc | 2.11 | 526,370 | -2.6 | 06/30/2026 |
| Morgan Stanley - Brokerage Accounts | 1.73 | 431,919 | +594.0 | 03/31/2026 |
| Marshall Wace Asset Management Ltd | 1.68 | 418,978 | +52.9 | 03/31/2026 |
| Palisades Investment Partners, LLC | 1.66 | 414,392 | +0.0 | 06/30/2026 |
| UBS Group AG | 1.63 | 407,014 | +5,704.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.78 | 693,556 | +0.0 | 07/31/2026 |
| iShares Russell 2000 ETF | 2.54 | 634,572 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Knowles Michael | Chief Executive Officer | 590,141 | 5,370,283 $ | Aug 15, 2026 | direct |
| Gabel Daniel G. | Chief Financial Officer | 150,064 | 1,365,582 $ | Aug 7, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 15, 2026 | Knowles Michael | Chief Executive Officer | Other | 8,621 | 13.61 | 117,332 |
| Aug 7, 2026 | Knowles Michael | Chief Executive Officer | Other | 8,621 | 13.32 | 114,832 |
| Aug 7, 2026 | Gabel Daniel G. | Chief Financial Officer | Other | 3,832 | 13.32 | 51,042 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.