One Stop Systems, Inc.
One Stop Systems, Inc. (OSS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OSS · as of Sep 30, 2025
Ownership Breakdown
63
Institutional Holders
▲ 20 vs Q2
$52.06M
Total Inst. Value
▲ $29.22M vs Q2
24.77M
Shares Outstanding
freeFloat 86.83%
9.71M
13F Shares Held
▲ 3.28M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
OSS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
LYNROCK LAKE LP electronic computers | 1.44M | 6.66% | 6.66% | $7.74B | Nov 14, 2025 | ▼ 605.7K |
BARD ASSOCIATES INC electronic computers | 917.3K | 4.23% | 4.23% | $4.92B | Nov 14, 2025 | ▼ 30.6K |
VANGUARD GROUP INC electronic computers | 872.7K | 4.02% | 4.02% | $4.68B | Nov 7, 2025 | ▲ 129.5K |
CITADEL ADVISORS LLC electronic computers | 864.9K | 3.99% | 3.99% | $4.64B | Nov 14, 2025 | ▲ 711.4K |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP electronic computers | 552.1K | 2.55% | 2.55% | $2.96B | Nov 13, 2025 | NEW |
MARSHALL WACE, LLP electronic computers | 501.2K | 2.31% | 2.31% | $2.69B | Nov 13, 2025 | ▲ 24.8K |
ARCHON CAPITAL MANAGEMENT LLC electronic computers | 476.8K | 2.20% | 2.20% | $2.56B | Nov 14, 2025 | ▲ 323.7K |
PACIFIC RIDGE CAPITAL PARTNERS, LLC electronic computers | 445.8K | 2.06% | 2.06% | $2.39B | Nov 12, 2025 | ▼ 9.1K |
RENAISSANCE TECHNOLOGIES LLC electronic computers | 393.2K | 1.81% | 1.81% | $2.11B | Nov 13, 2025 | ▲ 291.3K |
JANE STREET GROUP, LLC electronic computers | 326.0K | 1.50% | 1.50% | $1.75B | Nov 14, 2025 | ▲ 57.9K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
18
Increased
+2.02M shares20
New Positions
first time holders9
Decreased
−810.9K shares0
Sold Out
fully exitedNet shares change (top 50)
+1.21M
+2.02M / −810.9K
Net new holders
+29
20 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
OSS insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
4
Buy transactions
4
Sell transactions
1.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Gabel Daniel G. Chief Financial Officer | May 11, 2026 | Tax Withhold | 1,613 | $15.68 | $25.3K | 153.9K | Form 4 ↗ |
BASSETT DAVID GEORGE director | May 20, 2026 | Award | 11,984 | — | — | 33.0K | Form 4 ↗ |
BASSETT DAVID GEORGE director | May 26, 2026 | Sale | 8,000 | $17.64 | $141.1K | 25.0K | Form 4 ↗ |
BASSETT DAVID GEORGE director | May 21, 2025 | Award | 21,000 | — | — | 21.0K | Form 4 ↗ |
Matz Gregory W director | May 20, 2026 | Award | 11,984 | — | — | 86.9K | Form 4 ↗ |
Matz Gregory W director | May 26, 2026 | Sale | 8,000 | $17.52 | $140.2K | 78.9K | Form 4 ↗ |
Dumont Michael J. director | May 20, 2026 | Award | 11,984 | — | — | 119.8K | Form 4 ↗ |
Herbets Mitchell H director | May 20, 2026 | Award | 11,984 | — | — | 54.0K | Form 4 ↗ |
Herbets Mitchell H director | May 26, 2026 | Sale | 5,000 | $17.62 | $88.1K | 49.0K | Form 4 ↗ |
KNOWLES MICHAEL Chief Executive Officer | May 21, 2025 | Award | 0 | — | — | 591.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
One Stop Systems, Inc. (OSS) is primarily owned by institutional investors, who hold approximately 39.2% of total shares outstanding. Company insiders own approximately 13.17%, while retail and public investors account for the remaining 47.61%.
The largest institutional shareholder of One Stop Systems, Inc. is LYNROCK LAKE LP, holding approximately 1.44 million shares — equal to 6.66% of outstanding shares — as of September 30, 2025.
A total of 63 institutional investors currently hold OSS stock, with a combined institutional value of approximately $52,059,498 as of the most recent 13F filing period.
Frequently asked questions
OSS ownershipOne Stop Systems, Inc. (OSS) is primarily owned by institutional investors, who hold approximately 39.2% of shares. The largest shareholder is LYNROCK LAKE LP with a 6.66% stake. Company insiders hold 13.17%. Data sourced from SEC Form 13F as of September 30, 2025.