Jane Street firms hold 1.39M One Stop Systems shares (OSS)

Rhea-AI Filing Summary

Jane Street Group, LLC and affiliates report beneficial ownership of 1,388,714 shares of One Stop Systems, Inc. Common Stock, representing 5.6% of the class. The filing shows shared voting and dispositive power over those shares, reported on 05/07/2026.

Insights

Institutional Ownership Analyst

Large passive holding disclosed with shared control noted.

The Schedule 13G lists 1,388,714 shares held collectively by Jane Street Group, LLC and identified subsidiaries, equal to 5.6% of outstanding common stock as stated in the filing. The record shows shared voting and dispositive power rather than sole control.

Implications depend on trading intent and time horizon; subsequent filings may show changes in position or voting intentions. Cash-flow treatment and disposition plans are not stated in the provided excerpt.

Corporate Governance Specialist

Shared power flag is important for proxy and voting context.

The report explicitly attributes voting and dispositive power as "shared" for 1,388,714 shares, and identifies subsidiaries Jane Street Capital, LLC and Jane Street Global Trading, LLC. That structure affects who may act on shareholder votes.

Monitor future filings for any Section 13D amendments, statements of intent, or proxy-related disclosures that would alter governance signals.

Key Figures

Beneficial ownership: 1,388,714 shares Percent of class: 5.6% Jane Street Capital holdings: 1,130,008 shares +2 more

5 metrics

Beneficial ownership 1,388,714 shares Amount beneficially owned as listed in Item 4(a)

Percent of class 5.6% Percent of class reported in Item 4(b)

Jane Street Capital holdings 1,130,008 shares Amount attributed to Jane Street Capital, LLC in cover table

Jane Street Global Trading holdings 258,706 shares Amount attributed to Jane Street Global Trading, LLC in cover table

Filing type Schedule 13G Form type provided in metadata

Key Terms

Schedule 13G, Amount beneficially owned, Shared dispositive power

3 terms

Schedule 13G regulatory

"Cover and metadata indicating a passive investment report"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Amount beneficially owned financial

"Item 4(a) lists the exact share count and label"

Shared dispositive power regulatory

"Item 4(c)(iv) shows shared power to dispose of shares"

FAQ

What stake does Jane Street report in ONE STOP SYSTEMS (OSS)?

Jane Street reports beneficial ownership of 1,388,714 shares, or 5.6%. The Schedule 13G shows those shares with shared voting and dispositive power reported on 05/07/2026 by Jane Street Group and listed subsidiaries.

Which Jane Street entities are listed as holders of OSS shares?

Jane Street Group, LLC; Jane Street Capital, LLC; and Jane Street Global Trading, LLC are named. The filing lists a common business address at 250 Vesey Street, New York, NY, and identifies the two subsidiaries in Item 7.

Does the filing indicate sole voting or sole dispositive power over the shares?

No; the filing reports shared voting and shared dispositive power. Sole power values are listed as 0 while shared power values equal the full 1,388,714-share position in the provided excerpt.

Was the ownership reported on a specific date in the filing?

The cover lists 05/07/2026 and the signatures are dated 05/13/2026. The Schedule 13G identifies the reporting date as 05/07/2026 for the class and includes subsequent signature dates.

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

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Accepted by SEC EDGAR 05/13/2026 - 04:30 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

ONE STOP SYSTEMS, INC.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

68247W109

(CUSIP Number)

05/07/2026

(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

JANE STREET GROUP, LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,388,714.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,388,714.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,388,714.00

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)

5.6 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 68247W109

1

Names of Reporting Persons

Jane Street Capital, LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,130,008.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,130,008.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,130,008.00

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)

4.6 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

CUSIP Number(s): 68247W109

1

Names of Reporting Persons

Jane Street Global Trading, LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 258,706.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 258,706.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

258,706.00

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)

1.0 %

12

Type of Reporting Person (See Instructions)

OO

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: Jane Street Group, LLC; Jane Street Capital, LLC; Jane Street Global Trading, LLC;
(b)	Address or principal business office or, if none, residence: Jane Street Group, LLC 250 Vesey Street 6th Floor New York, NY 10281 Jane Street Capital, LLC 250 Vesey Street 6th Floor New York, NY 10281 Jane Street Global Trading, LLC 250 Vesey Street 6th Floor New York, NY 10281
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock, par value $0.0001 per share
(e)	CUSIP Number(s): 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: 1,388,714.00
(b)	Percent of class: 5.6%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 1,388,714.00
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 1,388,714.00
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Subsidiary Jane Street Capital, LLC Jane Street Global Trading, LLC
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
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.

JANE STREET GROUP, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	05/13/2026

Jane Street Capital, LLC

Signature:	Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	05/13/2026

Jane Street Global Trading, LLC

Signature:	Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	05/13/2026