Comparable stake leader
JANE STREET GROUP, LLC
SEC ownership of ONE STOP SYSTEMS, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001394056.
Disclosed value leader
JANE STREET GROUP, LLC
Comparable rows
50/50
Latest evidence
20 May 2026
- Public ticker
- OSS on Nasdaq
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- JANE STREET GROUP, LLC
- Latest 13D/G holder
- JANE STREET GROUP, LLC
- Latest parsed ownership date
- 20 May 2026
- Issuer CIK
- 0001394056
- Issuer location
- Escondido, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ONE STOP SYSTEMS, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
JANE STREET GROUP, LLC
Disclosed value leader
JANE STREET GROUP, LLC
Comparable rows
50/50
Latest evidence
20 May 2026
13D/G
13F
3/4/5
Lead comparable stake: 5.6%
13D/G row: JANE STREET GROUP, LLC
Showing 1-8 of 50 holder rows.
Quick read
JANE STREET GROUP, LLC leads the comparable SEC ownership view at 5.6%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens JANE STREET GROUP, LLC's linked filing trail.
Comparable ownership
Top 5
JANE STREET GROUP, LLC
5.6%
Horton Capital Partners Fund, L.P.
4.3%
Lynrock Lake LP
2.7%
BARD ASSOCIATES INC
2.2%
Michael Knowles
2.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| JANE STREET GROUP, LLC |
13D/G
13F
Company
|
5.6%
|
$12,304,006
1,388,714 shares
|
$0 | 07 May 2026 |
| Horton Capital Partners Fund, L.P. |
13D/G
Manko Joseph M. Jr.
|
4.3%
|
$2,026,821
938,343 shares
|
-$556,321 | 04 Jun 2025 |
| Lynrock Lake LP |
13D/G
13F
Company
|
2.7%
|
$7,524,873
665,918 shares
|
-$8,788,790 | 31 Dec 2025 |
| BARD ASSOCIATES INC |
13D/G
13F
Company
|
2.2%
|
$6,103,130
540,100 shares
|
$0 | 07 Nov 2025 |
| Michael Knowles |
3/4/5
Chief Executive Officer, Director
|
2.6%
|
$5,638,104
648,058 shares
|
— | 07 Feb 2026 |
| James Ison |
3/4/5
CPO
|
1.5%
|
$3,961,843
373,055 shares
|
— | 07 Feb 2026 |
| Michael J. Dumont |
3/4/5
Director
|
0.83%
|
$1,094,728
206,682 shares
|
— | 20 May 2026 |
| Daniel G. Gabel |
3/4/5
Chief Financial Officer
|
0.62%
|
$1,164,992
153,896 shares
|
— | 11 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$369,380.
Buys
$0
Insiders: 0
Sells
$369,380
Insiders: 3
Net
-$369,380
Shares: -21,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 21,000
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 21,000 | $0 | $369,380 | -$369,380 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-16 of 16 reporting-owner rows connected to ONE STOP SYSTEMS, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Michael Knowles
Net 12M change
-$369,380
Latest report
20 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Michael Knowles | Chief Executive Officer, Director | $5,638,104 | Mixed | 07 Feb 2026 | ||
| James Ison | Cpo | $3,961,843 | Mixed | 07 Feb 2026 | ||
| Steve D. Cooper | 10%+ Owner | $3,481,665 | Filing P/S | 22 Jan 2024 | ||
| Joseph M. Manko Jr. | Director | $2,379,839 | Mixed | 13 Aug 2024 | ||
| Gregory W. Matz | Director | $1,382,573 | -$140,160 | -9.2% | Filing P/S | 20 May 2026 |
| Daniel G. Gabel | Chief Financial Officer | $1,164,992 | Median | 11 May 2026 | ||
| Michael J. Dumont | Director | $1,094,728 | Mixed | 20 May 2026 | ||
| David Raun | Director | $915,034 | Mixed | 01 Apr 2024 | ||
| Kenneth F. Potashner | Director | $868,950 | Mixed | 09 Jul 2024 | ||
| Mitchell H. Herbets | Director | $863,098 | -$88,100 | -9.3% | Filing P/S | 20 May 2026 |
| John W. Morrison Jr. | Chief Financial Officer | $668,784 | Mixed | 11 Nov 2024 | ||
| David George Bassett | Director | $440,717 | -$141,120 | -24% | Filing P/S | 21 May 2025 |
| Jack Harrison | Director | $150,447 | Mixed | 17 Mar 2022 | ||
| Gioia Messinger | Director | $108,324 | Mixed | 01 Jul 2024 | ||
| Kimberly C. Sentovich | Director | $82,066 | Mixed | 17 Mar 2022 | ||
| Teresita M. Lowman | Director | $62,554 | Mixed | 17 Mar 2022 |
Recent insider transactions for ONE STOP SYSTEMS, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| David George Bassett | OSS | Common Stock | Sale | -24.2% | $141,120 | $17.64 | -8,000 | 24,984 | 26 May 2026 | Direct |
| Gregory W. Matz | OSS | Common Stock | Sale | -9.2% | $140,160 | $17.52 | -8,000 | 78,914 | 26 May 2026 | Direct |
| Mitchell H. Herbets | OSS | Common Stock | Sale | -9.26% | $88,100 | $17.62 | -5,000 | 48,984 | 26 May 2026 | Direct |
| David George Bassett | OSS | Common Stock | Award | 57.1% | 11,984 | 32,984 | 20 May 2026 | Direct | ||
| Gregory W. Matz | OSS | Common Stock | Award | 16% | 11,984 | 86,914 | 20 May 2026 | Direct | ||
| Michael J. Dumont | OSS | Common Stock | Award | 11.1% | 11,984 | 119,833 | 20 May 2026 | Direct | ||
| Mitchell H. Herbets | OSS | Common Stock | Award | 28.5% | 11,984 | 53,984 | 20 May 2026 | Direct | ||
| Daniel G. Gabel | OSS | Common Stock | Tax liability | -1.04% | -1,613 | 153,896 | 11 May 2026 | Direct | ||
| James Ison | OSS | Common Stock | Gift | 1.88% | 4,263 | 231,148 | 15 Feb 2026 | By Trust | ||
| James Ison | OSS | Common Stock | Gift | -2.92% | -4,263 | 141,907 | 15 Feb 2026 | Direct | ||
| James Ison | OSS | Common Stock | Tax liability | -2.09% | -3,120 | 146,170 | 15 Feb 2026 | Direct | ||
| Michael Knowles | OSS | Common Stock | Tax liability | -1.02% | -6,650 | 648,058 | 15 Feb 2026 | Direct | ||
| James Ison | OSS | Common Stock | Gift | 3.76% | 8,213 | 226,885 | 07 Feb 2026 | By Trust | ||
| James Ison | OSS | Common Stock | Gift | -5.5% | -8,213 | 141,077 | 07 Feb 2026 | Direct | ||
| James Ison | OSS | Common Stock | Tax liability | -4.2% | -6,546 | 149,290 | 07 Feb 2026 | Direct | ||
| James Ison | OSS | Common Stock | Award | 28.2% | 34,313 | 155,836 | 07 Feb 2026 | Direct | ||
| Daniel G. Gabel | OSS | Common Stock | Tax liability | -4.78% | -7,799 | 155,509 | 07 Feb 2026 | Direct | ||
| Michael Knowles | OSS | Common Stock | Tax liability | -1.99% | -13,298 | 654,708 | 07 Feb 2026 | Direct | ||
| Daniel G. Gabel | OSS | Common Stock | Award | 51.1% | 55,239 | 163,308 | 07 Feb 2026 | Direct | ||
| Michael Knowles | OSS | Common Stock | Award | 18% | 101,862 | 668,006 | 07 Feb 2026 | Direct | ||
| Daniel G. Gabel | OSS | Common Stock | Tax liability | -2.89% | -3,215 | 108,069 | 31 Dec 2025 | Direct | ||
| Michael Knowles | OSS | Common Stock | Tax liability | -3.26% | -19,075 | 566,144 | 31 Dec 2025 | Direct | ||
| Michael Knowles | OSS | Common Stock | Tax liability | -1.41% | -8,359 | 585,219 | 20 Aug 2025 | Direct | ||
| James Ison | OSS | Common Stock | Gift | 1.99% | 4,271 | 218,672 | 20 Aug 2025 | By Trust | ||
| James Ison | OSS | Common Stock | Gift | -3.4% | -4,271 | 121,523 | 20 Aug 2025 | Direct | ||
| James Ison | OSS | Common Stock | Tax liability | -2.41% | -3,113 | 125,794 | 20 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.