One Stop Systems: Galkins report 0.8% joint stake

The reported 0.8% is measured against 24,940,130 OSS common shares outstanding as of June 30, 2026.

Rhea-AI Filing Summary

ONE STOP SYSTEMS, INC. (OSS) is the issuer in an amended ownership report naming Vladimir Galkin, Angelica Galkin and the Angelica Galkin Revocable Trust. Vladimir and Angelica each report shared voting and dispositive power over 200,000 common shares jointly owned by the spouses, representing 0.8% of the class. The trust reports zero shares and zero voting or dispositive power. The percentage is based on 24,940,130 OSS common shares outstanding as of June 30, 2026.

Key Figures

Shares jointly owned by Vladimir and Angelica Galkin: 200,000 common shares Reported ownership percentage: 0.8% Common shares outstanding: 24,940,130 shares +1 more

4 metrics

Shares jointly owned by Vladimir and Angelica Galkin 200,000 common shares Each reports shared voting and dispositive power

Reported ownership percentage 0.8% Reported by each spouse

Common shares outstanding 24,940,130 shares As of June 30, 2026

Trust-reported shares 0 shares Angelica Galkin Revocable Trust

Key Terms

beneficially owned, Shared Voting Power, Shared Dispositive Power, group

4 terms

beneficially owned regulatory

"Amount beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Shared Voting Power regulatory

"Shared Voting Power 200,000.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

Shared Dispositive Power regulatory

"Shared Dispositive Power 200,000.00"

group regulatory

"may be deemed a member of a "group""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many OSS shares do Vladimir and Angelica Galkin report?

Vladimir and Angelica Galkin each report shared voting and dispositive power over 200,000 common shares jointly owned by the spouses. Each reports the shares as representing 0.8% of the class.

What percentage of OSS do the Galkins report, and what is it based on?

Each reports 0.8% of the class, based on 24,940,130 OSS common shares outstanding as of June 30, 2026.

What does the OSS ownership report say about group status?

The reporting persons state they may be deemed members of a group with one or more of the other reporting persons. They also state that the report is not an admission that any reporting person beneficially owns securities other than those directly held by that person.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 10/09/2026 - 02:51 PM Accepted by SEC EDGAR 10/09/2026 - 02:51 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

ONE STOP SYSTEMS, INC.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

68247W109

(CUSIP Number)

10/07/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 68247W109

1

Names of Reporting Persons

Galkin Vladimir

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 200,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 200,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

200,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.8 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: (1) Includes 200,000 shares of Common Stock jointly owned by Vladimir Galkin and Angelica Galkin, husband and wife (the Galkins). (2) Based on 24,940,130 shares of the Issuer's Common Stock outstanding as of June 30, 2026, as reported on the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the SEC) on August 5, 2026.

SCHEDULE 13G

CUSIP Number(s): 68247W109

1

Names of Reporting Persons

Galkin Angelica

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 200,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 200,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

200,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.8 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: (1) Includes 200,000 shares of Common Stock jointly owned by the Galkins. (2) Based on 24,940,130 shares of the Issuer's Common Stock outstanding as of June 30, 2026, as reported on the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the SEC) on August 5, 2026.

SCHEDULE 13G

CUSIP Number(s): 68247W109

1

Names of Reporting Persons

Angelica Galkin Revocable Trust, dated April 21, 2018

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

FLORIDA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: (1) Angelica Galkin is the sole trustee and beneficiary of the Galkin Revocable Trust. (2) Based on 24,940,130 shares of the Issuer's Common Stock outstanding as of June 30, 2026, as reported on the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the SEC) on August 5, 2026

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ONE STOP SYSTEMS, INC.
(b)	Address of issuer's principal executive offices: 2235 ENTERPRISE ST STE 110, ESCONDIDO, CALIFORNIA 92029
Item 2.
(a)	Name of person filing: Vladimir Galkin Angelica Galkin Angelica Galkin Revocable Trust
(b)	Address or principal business office or, if none, residence: 10900 NW 97th Street, #102 Miami, FL 33178
(c)	Citizenship: Vladimir Galkin and Angelica Galkin are citizens of United States. Angelica Galkin Revocable Trust is organized in the state of Florida.
(d)	Title of class of securities: Common Stock, par value $0.0001 per share
(e)	CUSIP No.: 68247W109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Reference is made as to each of the Reporting Persons hereunder to Rows 5-9 and 11 of each of the cover pages of this Schedule 13G and associated footnotes, which are incorporated by reference herein. Each of the Reporting Persons hereunder may be deemed a member of a "group" within the meaning of Section 13(d)(3) of the Exchange Act, or Rule 13d-5 promulgated under the Exchange Act with one or more of the other Reporting Persons hereunder. Although the Reporting Persons are reporting such securities as if they were members of a "group," the filing of this Schedule 13G shall not be construed as an admission by any Reporting Person that such Reporting Person is a beneficial owner of any securities other than those directly held by such Reporting Person.
(b)	Percent of class: See information for reporting persons.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See information for reporting persons.
	(ii) Shared power to vote or to direct the vote: See information for reporting persons.
	(iii) Sole power to dispose or to direct the disposition of: See information for reporting persons.
	(iv) Shared power to dispose or to direct the disposition of: See information for reporting persons.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. See Item 4 of this Schedule 13G and the Joint Filing Agreement attached hereto as Exhibit A.
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Galkin Vladimir

Signature:	/s/ Vladimir Galkin
Name/Title:	Individual
Date:	10/09/2026

Galkin Angelica

Signature:	/s/ Angelica Galkin
Name/Title:	Individual
Date:	10/09/2026

Angelica Galkin Revocable Trust, dated April 21, 2018

Signature:	/s/ Angelica Galkin
Name/Title:	Trustee
Date:	10/09/2026