Quick Takeaways
- OSS - ONE STOP SYSTEMS, INC. has 16 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 16 Insiders of ONE STOP SYSTEMS, INC.
- Symbol
- OSS on Nasdaq
- Location
- Escondido, CA
What Changed
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 13 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
ONE STOP SYSTEMS, INC. executives and other stock owners filed with the SEC include:
| 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 | ||
| Daniel G. Gabel | Chief Financial Officer | $1,436,903 | Mixed | 07 Feb 2026 | ||
| David Raun | Director | $915,034 | Mixed | 01 Apr 2024 | ||
| Kenneth F. Potashner | Director | $868,950 | Mixed | 09 Jul 2024 | ||
| John W. Morrison Jr. | Chief Financial Officer | $668,784 | Mixed | 11 Nov 2024 | ||
| Michael J. Dumont | Director | $232,953 | Mixed | 21 May 2025 | ||
| Gregory W. Matz | Director | $161,848 | Mixed | 21 May 2025 | ||
| Jack Harrison | Director | $150,447 | Mixed | 17 Mar 2022 | ||
| Gioia Messinger | Director | $108,324 | Mixed | 01 Jul 2024 | ||
| Mitchell H. Herbets | Director | $90,720 | Mixed | 21 May 2025 | ||
| Kimberly C. Sentovich | Director | $82,066 | Mixed | 17 Mar 2022 | ||
| Teresita M. Lowman | Director | $62,554 | Mixed | 17 Mar 2022 | ||
| David George Bassett | Director | Mixed | 14 May 2025 |
Top shareholders of ONE STOP SYSTEMS, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
|
Company |
4.3%
|
1,054,266
|
$7,569,630 | — | 31 Dec 2025 | |
| Lynrock Lake LP |
13D/G
13F
|
Company |
2.7%
|
665,918
|
$7,524,873 | -$8,788,790 | 31 Dec 2025 | |
| BARD ASSOCIATES INC |
13F
13D/G
|
Company |
2.2%
from 13D/G
|
850,858
|
$6,109,161 | — | 31 Dec 2025 | |
| Michael Knowles |
3/4/5
|
Chief Executive Officer, Director |
2.6%
|
648,058
|
$5,638,104 | — | 07 Feb 2026 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
2.8%
|
693,493
|
$4,979,280 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
2.4%
|
603,805
|
$4,335,320 | — | 31 Dec 2025 | |
| James Ison |
3/4/5
|
CPO |
1.5%
|
373,055
|
$3,961,843 | — | 07 Feb 2026 | |
| Steve D. Cooper |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
1,923,572
|
$3,481,665 | — | 22 Jan 2024 | |
| Pacific Ridge Capital Partners, LLC |
13F
|
Company |
1.8%
|
432,361
|
$3,104,352 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
1.5%
|
375,701
|
$2,697,533 | — | 31 Dec 2025 | |
| Joseph M. Manko Jr. |
3/4/5
|
Director |
—
class O/S missing
|
1,195,899
|
$2,379,839 | — | 13 Aug 2024 | |
| Archon Capital Management LLC |
13F
|
Company |
1.3%
|
326,812
|
$2,346,510 | — | 31 Dec 2025 | |
| Horton Capital Partners Fund, L.P. |
13D/G
|
Manko Joseph M. Jr. |
4.3%
|
938,343
|
$2,026,821 | -$556,321 | 04 Jun 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
1.1%
|
273,935
|
$1,966,852 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
1.1%
|
259,072
|
$1,860,137 | — | 31 Dec 2025 | |
| Trexquant Investment LP |
13F
|
Company |
1%
|
256,810
|
$1,843,896 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
1%
|
253,294
|
$1,818,651 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.97%
|
238,495
|
$1,712,992 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.93%
|
228,336
|
$1,639,452 | — | 31 Dec 2025 | |
| Daniel G. Gabel |
3/4/5
|
Chief Financial Officer |
0.63%
|
155,509
|
$1,436,903 | — | 07 Feb 2026 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
0.75%
|
185,992
|
$1,331,000 | — | 31 Dec 2025 | |
| Informed Momentum Co LLC |
13F
|
Company |
0.66%
|
162,973
|
$1,170,146 | — | 31 Dec 2025 | |
| THOMPSON SIEGEL & WALMSLEY LLC |
13F
|
Company |
0.62%
|
153,124
|
$1,099,000 | — | 31 Dec 2025 | |
| DnB Asset Management AS |
13F
|
Company |
0.62%
|
152,901
|
$1,097,829 | — | 31 Dec 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.6%
|
147,960
|
$1,062,353 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.59%
|
145,676
|
$1,045,954 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
0.56%
|
137,444
|
$986,848 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.52%
|
128,749
|
$924,418 | — | 31 Dec 2025 | |
| David Raun |
3/4/5
|
Director |
—
class O/S missing
|
425,597
|
$915,034 | — | 01 Apr 2024 | |
| Kenneth F. Potashner |
3/4/5
|
Director |
—
class O/S missing
|
398,601
|
$868,950 | — | 09 Jul 2024 | |
| Cambridge Investment Research Advisors, Inc. |
13F
|
Company |
0.46%
|
113,038
|
$812,000 | — | 31 Dec 2025 | |
| Manatuck Hill Partners, LLC |
13F
|
Company |
0.41%
|
100,000
|
$718,000 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.4%
|
99,848
|
$716,909 | — | 31 Dec 2025 | |
| John W. Morrison Jr. |
3/4/5
|
Chief Financial Officer |
—
class O/S missing
|
305,381
|
$668,784 | — | 11 Nov 2024 | |
| 683 Capital Management, LLC |
13F
|
Company |
0.37%
|
90,253
|
$648,017 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
0.34%
|
84,576
|
$607,256 | — | 31 Dec 2025 | |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
|
Company |
0.28%
|
69,356
|
$497,976 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.28%
|
68,394
|
$491,069 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.25%
|
62,240
|
$446,884 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.23%
|
55,500
|
$398,490 | — | 31 Dec 2025 | |
| XTX Topco Ltd |
13F
|
Company |
0.22%
|
54,806
|
$393,507 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
0.22%
|
54,309
|
$389,939 | — | 31 Dec 2025 | |
| Belpointe Asset Management LLC |
13F
|
Company |
0.21%
|
52,000
|
$373,360 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.21%
|
51,093
|
$366,848 | — | 31 Dec 2025 | |
| OMERS ADMINISTRATION Corp |
13F
|
Company |
0.2%
|
48,200
|
$346,076 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.19%
|
47,163
|
$338,630 | — | 31 Dec 2025 | |
| Penbrook Management LLC |
13F
|
Company |
0.19%
|
46,740
|
$335,593 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.17%
|
41,923
|
$301,007 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.17%
|
41,510
|
$298,042 | — | 31 Dec 2025 | |
| OCCUDO QUANTITATIVE STRATEGIES LP |
13F
|
Company |
0.14%
|
35,605
|
$255,644 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for ONE STOP SYSTEMS, INC.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| Michael Knowles | OSS | Common Stock | Tax liability | -3.11% | -19,075 | 593,578 | 05 Jun 2025 | Direct | ||
| Michael Knowles | OSS | Common Stock | Award | 0 | 591,653 | 21 May 2025 | Direct | |||
| Michael Knowles | OSS | Common Stock | Award | 0 | 591,653 | 21 May 2025 | Direct | |||
| Michael Knowles | OSS | Common Stock | Award | 3.55% | 21,000 | 612,653 | 21 May 2025 | Direct | ||
| Mitchell H. Herbets | OSS | Common Stock | Award | 100% | 21,000 | 42,000 | 21 May 2025 | Direct | ||
| Michael J. Dumont | OSS | Common Stock | Tax liability | 21,000 | 21,000 | 21 May 2025 | Direct | |||
| Gregory W. Matz | OSS | Common Stock | Award | 38.9% | 21,000 | 74,930 | 21 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.