OSS

One Stop Systems, INC.

Insider trading activity for One Stop Systems, INC., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

-$369.4K

net selling

Bought(0 · 0 insiders): $0
Sold(3 · 3 insiders): $369.4K

Past 12 months

-$369.4K

net selling

Bought(0 · 0 insiders): $0
Sold(3 · 3 insiders): $369.4K

Transaction history

The 39 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Aug 15	Knowles Michael	Chief Executive Officer	FTAX	8,621	$13.61	$117.3K	-1.4%	Open the original filing on SEC.gov
Aug 7	Knowles Michael	Chief Executive Officer	FTAX	8,621	$13.32	$114.8K	-1.4%	Open the original filing on SEC.gov
Aug 7	Gabel Daniel G.	Chief Financial Officer	FTAX	3,832	$13.32	$51K	-2.5%	Open the original filing on SEC.gov
Jun 5	Knowles Michael	Chief Executive Officer	FTAX	19,675	$16.89	$332.3K	-3.1%	Open the original filing on SEC.gov
May 26	Matz Gregory W	Director	SSELL	8,000	$17.52	$140.2K	-9.2%	Open the original filing on SEC.gov
May 26	Herbets Mitchell H	Director	SSELL	5,000	$17.62	$88.1K	-9.3%	Open the original filing on SEC.gov
May 26	Bassett David George	Director	SSELL	8,000	$17.64	$141.1K	-24.3%	Open the original filing on SEC.gov
May 20	Matz Gregory W	Director	AGRANT	11,984	—	—	+16.0%	Open the original filing on SEC.gov
May 20	Herbets Mitchell H	Director	AGRANT	11,984	—	—	+28.5%	Open the original filing on SEC.gov
May 20	Dumont Michael J.	Director	AGRANT	11,984	—	—	+11.1%	Open the original filing on SEC.gov
May 20	Bassett David George	Director	AGRANT	11,984	—	—	+57.1%	Open the original filing on SEC.gov
May 11	Gabel Daniel G.	Chief Financial Officer	FTAX	1,613	$15.68	$25.3K	-1.0%	Open the original filing on SEC.gov
Feb 15	Knowles Michael	Chief Executive Officer	FTAX	6,650	$8.70	$57.9K	-1.0%	Open the original filing on SEC.gov
Feb 15	Ison James	Cpo	GGIFT	4,263	—	—	+1.9%	Open the original filing on SEC.gov
Feb 15	Ison James	Cpo	GGIFT	4,263	—	—	-2.9%	Open the original filing on SEC.gov
Feb 15	Ison James	Cpo	FTAX	3,120	$8.70	$27.1K	-2.1%	Open the original filing on SEC.gov
Feb 7	Knowles Michael	Chief Executive Officer	AGRANT	101,862	—	—	+18.0%	Open the original filing on SEC.gov
Feb 7	Gabel Daniel G.	Chief Financial Officer	AGRANT	55,239	—	—	+51.1%	Open the original filing on SEC.gov
Feb 7	Knowles Michael	Chief Executive Officer	FTAX	13,298	$9.24	$122.9K	-2.0%	Open the original filing on SEC.gov
Feb 7	Ison James	Cpo	GGIFT	8,213	—	—	+3.8%	Open the original filing on SEC.gov
Feb 7	Ison James	Cpo	GGIFT	8,213	—	—	-5.5%	Open the original filing on SEC.gov
Feb 7	Ison James	Cpo	FTAX	6,546	$9.24	$60.5K	-4.2%	Open the original filing on SEC.gov
Feb 7	Ison James	Cpo	AGRANT	34,313	—	—	+28.2%	Open the original filing on SEC.gov
Feb 7	Gabel Daniel G.	Chief Financial Officer	FTAX	7,799	$9.24	$72.1K	-4.8%	Open the original filing on SEC.gov
Dec 31, 2025	Knowles Michael	Chief Executive Officer	FTAX	19,075	$7.18	$137K	-3.3%	Open the original filing on SEC.gov
Dec 31, 2025	Gabel Daniel G.	Chief Financial Officer	FTAX	3,215	$7.18	$23.1K	-2.9%	Open the original filing on SEC.gov
Aug 20, 2025	Ison James	Cpo	GGIFT	4,271	—	—	+2.0%	Open the original filing on SEC.gov
Aug 20, 2025	Ison James	Cpo	GGIFT	4,271	—	—	-3.4%	Open the original filing on SEC.gov
Aug 20, 2025	Ison James	Cpo	FTAX	3,113	$5.26	$16.4K	-2.4%	Open the original filing on SEC.gov
Aug 20, 2025	Knowles Michael	Chief Executive Officer	FTAX	8,359	$5.26	$44K	-1.4%	Open the original filing on SEC.gov
Jun 5, 2025	Knowles Michael	Chief Executive Officer	FTAX	19,075	$3.06	$58.4K	-3.1%	Open the original filing on SEC.gov
May 21, 2025	Matz Gregory W	Director	AGRANT	21,000	—	—	+38.9%	Open the original filing on SEC.gov
May 21, 2025	Dumont Michael J.	Director	FTAX	21,000	—	—	—	Open the original filing on SEC.gov
May 21, 2025	Herbets Mitchell H	Director	AGRANT	21,000	—	—	+100.0%	Open the original filing on SEC.gov
May 21, 2025	Knowles Michael	Chief Executive Officer	AGRANT	21,000	—	—	+3.5%	Open the original filing on SEC.gov
May 21, 2025	Knowles Michael	Chief Executive Officer	AGRANT↺	0	—	—	—	Open the original filing on SEC.gov
May 21, 2025	Bassett David George	Director	AGRANT	21,000	—	—	—	Open the original filing on SEC.gov
Feb 20, 2025	Knowles Michael	Chief Executive Officer	FTAX	16,800	$3.76	$63.2K	-2.8%	Open the original filing on SEC.gov
Feb 7, 2025	Knowles Michael	Chief Executive Officer	AGRANT	131,448	$4.06	$533.7K	+27.6%	Open the original filing on SEC.gov

FTAX$117.3K

Knowles Michael · Chief Executive…Aug 15

8,621 sh @ $13.61 · -1.4% own

FTAX$114.8K

Knowles Michael · Chief Executive…Aug 7

8,621 sh @ $13.32 · -1.4% own

FTAX$51K

Gabel Daniel G. · Chief Financial…Aug 7

3,832 sh @ $13.32 · -2.5% own

FTAX$332.3K

Knowles Michael · Chief Executive…Jun 5

19,675 sh @ $16.89 · -3.1% own

SSELL$140.2K

Matz Gregory W · DirectorMay 26

8,000 sh @ $17.52 · -9.2% own

SSELL$88.1K

Herbets Mitchell H · DirectorMay 26

5,000 sh @ $17.62 · -9.3% own

SSELL$141.1K

Bassett David George · DirectorMay 26

8,000 sh @ $17.64 · -24.3% own

AGRANT—

Matz Gregory W · DirectorMay 20

11,984 sh · +16.0% own

AGRANT—

Herbets Mitchell H · DirectorMay 20

11,984 sh · +28.5% own

AGRANT—

Dumont Michael J. · DirectorMay 20

11,984 sh · +11.1% own

AGRANT—

Bassett David George · DirectorMay 20

11,984 sh · +57.1% own

FTAX$25.3K

Gabel Daniel G. · Chief Financial…May 11

1,613 sh @ $15.68 · -1.0% own

FTAX$57.9K

Knowles Michael · Chief Executive…Feb 15

6,650 sh @ $8.70 · -1.0% own

GGIFT—

Ison James · CpoFeb 15

4,263 sh · +1.9% own

GGIFT—

Ison James · CpoFeb 15

4,263 sh · -2.9% own

FTAX$27.1K

Ison James · CpoFeb 15

3,120 sh @ $8.70 · -2.1% own

AGRANT—

Knowles Michael · Chief Executive…Feb 7

101,862 sh · +18.0% own

AGRANT—

Gabel Daniel G. · Chief Financial…Feb 7

55,239 sh · +51.1% own

FTAX$122.9K

Knowles Michael · Chief Executive…Feb 7

13,298 sh @ $9.24 · -2.0% own

GGIFT—

Ison James · CpoFeb 7

8,213 sh · +3.8% own

GGIFT—

Ison James · CpoFeb 7

8,213 sh · -5.5% own

FTAX$60.5K

Ison James · CpoFeb 7

6,546 sh @ $9.24 · -4.2% own

AGRANT—

Ison James · CpoFeb 7

34,313 sh · +28.2% own

FTAX$72.1K

Gabel Daniel G. · Chief Financial…Feb 7

7,799 sh @ $9.24 · -4.8% own

FTAX$137K

Knowles Michael · Chief Executive…Dec 31, 2025

19,075 sh @ $7.18 · -3.3% own

FTAX$23.1K

Gabel Daniel G. · Chief Financial…Dec 31, 2025

3,215 sh @ $7.18 · -2.9% own

GGIFT—

Ison James · CpoAug 20, 2025

4,271 sh · +2.0% own

GGIFT—

Ison James · CpoAug 20, 2025

4,271 sh · -3.4% own

FTAX$16.4K

Ison James · CpoAug 20, 2025

3,113 sh @ $5.26 · -2.4% own

FTAX$44K

Knowles Michael · Chief Executive…Aug 20, 2025

8,359 sh @ $5.26 · -1.4% own

FTAX$58.4K

Knowles Michael · Chief Executive…Jun 5, 2025

19,075 sh @ $3.06 · -3.1% own

AGRANT—

Matz Gregory W · DirectorMay 21, 2025

21,000 sh · +38.9% own

FTAX—

Dumont Michael J. · DirectorMay 21, 2025

21,000 sh

AGRANT—

Herbets Mitchell H · DirectorMay 21, 2025

21,000 sh · +100.0% own

AGRANT—

Knowles Michael · Chief Executive…May 21, 2025

21,000 sh · +3.5% own

AGRANT↺—

Knowles Michael · Chief Executive…May 21, 2025

0 sh

AGRANT—

Bassett David George · DirectorMay 21, 2025

21,000 sh

FTAX$63.2K

Knowles Michael · Chief Executive…Feb 20, 2025

16,800 sh @ $3.76 · -2.8% own

AGRANT$533.7K

Knowles Michael · Chief Executive…Feb 7, 2025

131,448 sh @ $4.06 · +27.6% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

12 of 20 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 249 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
May 21, 2025	May 25	Bassett David GeorgeDirector	249days · about 12 months	$141.1K	Filing ↗
Feb 7, 2025	Sep 1, 2025	Knowles MichaelChief Executive Officer	139days · about 7 months	$533.7K	Filing ↗
Aug 7	Sep 4	Gabel Daniel G.Chief Financial Officer	18days	$51K	Filing ↗
Aug 7	Sep 4	Knowles MichaelChief Executive Officer	18days	$117.3K	Filing ↗
Feb 7	Mar 1	Ison JamesCpo	12days	$60.5K	Filing ↗

Bassett David GeorgeDirector

249days · about 12 months

Traded May 21, 2025 · filed May 25Filing ↗

Knowles MichaelChief Executive Officer

139days · about 7 months

Traded Feb 7, 2025 · filed Sep 1, 2025Filing ↗

Gabel Daniel G.Chief Financial Officer

18days

Traded Aug 7 · filed Sep 4Filing ↗

Knowles MichaelChief Executive Officer

18days

Traded Aug 7 · filed Sep 4Filing ↗

Ison JamesCpo

12days

Traded Feb 7 · filed Mar 1Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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