One Stop Systems, Inc. (OSS) Ownership
OSS ownership summary
as of October 17, 2026- Institutions
- 48.6% of shares outstanding
- Insiders
- 11.38% of shares outstanding
- Shares outstanding
- 24.9M
- Float
- 21.9M shares available to trade
- Short interest
- 18.47% 4.5M shares short
- Days to cover
- 6.76 short interest down 4.7% vs prior month
- Institutions 48.56%
- Insiders 11.38%
- Other investors 40.06%
OSS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.37% | 1.8M | $10.9M | +1.2M (+207.7%) | June 30, 2026 |
| 2 | Jane Street Group LLC | 5.25% | 1.3M | $7.8M | +434,897 (+49.7%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 3.91% | 975K | $5.8M | +14,980 (+1.6%) | June 30, 2026 |
| 4 | Geode Capital Management, LLC | 2.30% | 573K | $3.4M | +320,465 (+126.9%) | June 30, 2026 |
| 5 | Bard Associates Inc | 2.11% | 526K | $3.1M | −14,296 (−2.6%) | June 30, 2026 |
| 6 | Palisades Investment Partners, LLC | 1.66% | 414K | $2.5M | +414,392 (0.0%) | June 30, 2026 |
| 7 | Renaissance Technologies Corp | 1.64% | 408K | $2.4M | +147,900 (+56.9%) | June 30, 2026 |
| 8 | State Street Corp | 1.54% | 384K | $2.3M | +282,583 (+277.9%) | June 30, 2026 |
| 9 | Millennium Management LLC | 1.35% | 338K | $2.0M | −63,019 (−15.7%) | June 30, 2026 |
| 10 | Qube Research & Technologies | 1.28% | 319K | $1.9M | +318,919 (0.0%) | June 30, 2026 |
| 11 | CAMBRIDGE Invest RESEARCH ADVISORS, INC. | 1.20% | 299K | $1.8M | +152,960 (+105.0%) | June 30, 2026 |
| 12 | Northern Trust Corp | 0.71% | 178K | $1.1M | +131,127 (+279.1%) | June 30, 2026 |
| 13 | Two Sigma Investments LLC | 0.65% | 162K | $965,048 | +162,193 (0.0%) | June 30, 2026 |
| 14 | Vanguard Fiduciary Trust Co | 0.63% | 157K | $936,322 | +28,606 (+22.2%) | June 30, 2026 |
| 15 | Vanguard Portfolio Management, LLC | 0.62% | 155K | $924,678 | +155,408 (0.0%) | June 30, 2026 |
| 16 | New York State Common Retirement Fund | 0.59% | 147K | $876,691 | +147,343 (0.0%) | June 30, 2026 |
| 17 | Dimensional Fund Advisors, Inc. | 0.59% | 147K | $873,882 | +146,871 (0.0%) | June 30, 2026 |
| 18 | Squarepoint Ops LLC | 0.53% | 131K | $781,509 | +72,870 (+124.6%) | June 30, 2026 |
| 19 | The Informed Momentum Company (formerly EAM Investors) | 0.52% | 131K | $776,880 | −5,421 (−4.0%) | June 30, 2026 |
| 20 | DnB NOR Asset Management (Asia) | 0.48% | 119K | $706,616 | −133,974 (−53.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 4.2M shares and 4 cut 217K.
OSS top mutual fund and ETF holders
17 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.78% | 694K | $4.1M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.46% | 613K | $3.6M | −7,040 (−1.1%) | September 30, 2026 |
| 3 | Fidelity Small Cap Index | 0.99% | 246K | $1.5M | +2,414 (+1.0%) | July 31, 2026 |
| 4 | DNB Fund Disrpt Opps A EUR Acc | 0.90% | 225K | $1.3M | +17,033 (+8.2%) | August 31, 2026 |
| 5 | iShares Russell 2000 Growth ETF | 0.79% | 196K | $1.2M | −248 (−0.1%) | September 30, 2026 |
| 6 | Vanguard Russell 2000 ETF | 0.52% | 129K | $765,265 | +2,520 (+2.0%) | August 31, 2026 |
| 7 | Fidelity Extended Market Index | 0.43% | 107K | $637,370 | +548 (+0.5%) | August 31, 2026 |
| 8 | iShares Micro-Cap ETF | 0.27% | 67K | $397,698 | −461 (−0.7%) | September 30, 2026 |
| 9 | Schwab Small Cap Index | 0.22% | 55K | $329,392 | — | August 31, 2026 |
| 10 | Stt Strt SPDR® Russell2000 US SmCapETF | 0.18% | 44K | $264,692 | +2,132 (+5.0%) | August 31, 2026 |
| 11 | iShares Russell 2000 Small-Cap Idx Instl | 0.17% | 42K | $249,918 | — | August 31, 2026 |
| 12 | Fidelity Total Market Index | 0.16% | 41K | $242,980 | +622 (+1.5%) | August 31, 2026 |
| 13 | Inspire Small/Mid Cap ETF | 0.15% | 38K | $225,904 | — | September 30, 2026 |
| 14 | DFA US Small Cap I | 0.15% | 36K | $215,997 | — | August 31, 2026 |
| 15 | Fidelity Series Total Market Index | 0.14% | 35K | $208,702 | +2,043 (+6.2%) | August 31, 2026 |
| 16 | Goldman Sachs Small Cap Eq Insghts Instl | 0.14% | 35K | $208,423 | +35,029 (0.0%) | July 31, 2026 |
| 17 | Nuveen Small Cap Blend Idx R6 | 0.12% | 30K | $177,370 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OSS insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-08-13 | Joseph M Jr. Manko | Buy | $1.94 | 50,000 | $97,000 |
| 2024-01-22 | Steve D Cooper | Sell | $1.81 | 206,040 | $372,932 |
| 2023-08-16 | Michael Knowles | Buy | $1.80 | 1,130 | $2,034 |
| 2023-08-14 | David Raun | Buy | $1.97 | 5,000 | $9,850 |
| 2023-07-31 | Steve D Cooper | Sell | $2.80 | 203,591 | $570,055 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OSS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OSS
Institutional investors own 48.6% of One Stop Systems's shares and insiders 11.38%. The largest holder is BlackRock Inc with 7.37% of the shares (1.8M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 4 reduced their stake in the latest filings. Short interest is 18.47% of the float, or 6.76 days of average trading volume. The share count rose 174.1% since 2016.
Related: OSS analyst forecast, OSS key metrics. See the OSS stock overview for the latest quote and news.
OSS ownership FAQ
Who owns the most One Stop Systems stock?
The largest shareholders of One Stop Systems are BlackRock Inc (7.37%), Jane Street Group LLC (5.25%), Vanguard Capital Management, LLC (3.91%), Geode Capital Management, LLC (2.30%), Bard Associates Inc (2.11%).
What percentage of One Stop Systems is owned by institutions?
Institutions hold 48.6% of One Stop Systems's shares outstanding; insiders hold 11.38%.
Which funds own One Stop Systems?
The largest fund holders of One Stop Systems are Vanguard MStar Total Stk Mkt Idx Invest (2.78%), iShares Russell 2000 ETF (2.46%), Fidelity Small Cap Index (0.99%), DNB Fund Disrpt Opps A EUR Acc (0.90%), iShares Russell 2000 Growth ETF (0.79%).
What is One Stop Systems's short interest?
4.5M shares of One Stop Systems were sold short, 18.47% of the float; at the average daily volume it would take 6.76 days to cover.
Are insiders buying or selling One Stop Systems?
Of the latest 5 reported insider transactions in One Stop Systems (since July 31, 2023), 3 were purchases and 2 were sales.
How many shares of One Stop Systems are outstanding?
One Stop Systems has 24.9M shares outstanding, of which 21.9M are in the public float.