Jack in the Box: Nantahala reports 1.54M shares

Jack in the Box Inc. Schedule 13G: Nantahala Capital Management, LLC may be deemed the beneficial owner of 1,542,715 shares of Common Stock, representing 8.10% of the class as of 03/31/2026.

Rhea-AI Filing Summary

Jack in the Box Inc. Schedule 13G: Nantahala Capital Management, LLC may be deemed the beneficial owner of 1,542,715 shares of Common Stock, representing 8.10% of the class as of 03/31/2026. Wilmot B. Harkey and Daniel Mack, as managing members, are each reported with the same beneficial amount and percentage.

The filing states the reported shares are held by funds and separately managed accounts under Nantahala's control, and that voting and dispositive power over these shares is reported as shared rather than sole.

Insights

Corporate Governance Analyst

Nantahala reports an 8.10% shared stake in Jack in the Box as of 03/31/2026.

This Schedule 13G discloses a beneficial ownership position of 1,542,715 shares held across funds and managed accounts under Nantahala's control. The filing repeatedly uses the phrase "may be deemed to be the beneficial owner," reflecting standard adviser reporting language.

Reported powers are shared voting and shared dispositive, not sole authority. Subsequent filings or proxy disclosures would be the venue for any changes in voting intent or proposals.

Investor Relations Advisor

Filing is a routine disclosure of a passive investor stake, not an activist notice.

The Schedule 13G classification and the wording indicate an investment-adviser reporting a passive or non-control position under applicable rules. The filing lists Nantahala, plus two managing members, each attributed the same percentage for reporting purposes.

Stakeholders may watch future filings for changes in ownership percentages or a switch to Schedule 13D, which would signal active intent; timing not specified in the provided excerpt.

Key Figures

Filing type: Schedule 13G Beneficial ownership: 1,542,715 shares Percent of class: 8.10% +1 more

4 metrics

Filing type Schedule 13G Ownership disclosure for Common Stock

Beneficial ownership 1,542,715 shares held by funds and separately managed accounts under Nantahala control as of <date>03/31/2026</date>

Percent of class 8.10% Percentage of Common Stock outstanding as of <date>03/31/2026</date>

CUSIP 466367109 Common Stock CUSIP reported in the filing

Key Terms

beneficially owned, shared dispositive power, Schedule 13G

3 terms

beneficially owned regulatory

"As of March 31, 2026, Nantahala may be deemed to be the beneficial owner of 1,542,715 Shares"

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 dispositive power regulatory

"Shared Dispositive Power 1,542,715.00"

Schedule 13G regulatory

"Item 1. (a) Name of issuer: JACK IN THE BOX INC."

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.

FAQ

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

What stake did Nantahala report in JACK?

Nantahala reported a beneficial ownership of 1,542,715 shares, equal to 8.10% of the outstanding Common Stock as of 03/31/2026. The shares are held by funds and separately managed accounts under Nantahala's control.

Does the Schedule 13G indicate shared or sole control over JACK shares?

The filing reports shared voting power and shared dispositive power of 1,542,715 shares for Nantahala and each named reporting person, with no sole voting or dispositive power claimed in the excerpt.

Who are the reporting persons in the JACK Schedule 13G?

The filing lists (1) Nantahala Capital Management, LLC, (2) Wilmot B. Harkey, and (3) Daniel Mack, each reported as beneficial owners of the same 1,542,715-share position as of 03/31/2026.

What does 'may be deemed to be the beneficial owner' mean in this filing?

The phrase indicates the adviser and its managing members are reported as beneficial holders of shares held by accounts they manage. It reflects reporting attribution under adviser rules, not necessarily direct personal ownership by the individuals named.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:42 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

JACK IN THE BOX INC.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

466367109

(CUSIP Number)

03/31/2026

(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): 466367109

1

Names of Reporting Persons

Nantahala Capital Management, 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

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,542,715.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,542,715.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,542,715.00

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)

8.10 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 466367109

1

Names of Reporting Persons

Wilmot B. Harkey

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 1,542,715.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,542,715.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,542,715.00

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)

8.10 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 466367109

1

Names of Reporting Persons

Daniel Mack

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 1,542,715.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,542,715.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,542,715.00

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)

8.10 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: JACK IN THE BOX INC.
(b)	Address of issuer's principal executive offices: 9357 SPECTRUM CENTER BLVD SAN DIEGO, CALIFORNIA, 92123-1516
Item 2.
(a)	Name of person filing: (1) Nantahala Capital Management, LLC ("Nantahala") (2) Wilmot B. Harkey (3) Daniel Mack (together the "Reporting Persons")
(b)	Address or principal business office or, if none, residence: 130 Main St. 2nd Floor, New Canaan, Connecticut 06840
(c)	Citizenship: (1) Nantahala is a Massachusetts limited liability company. (2) Each of Messrs. Harkey and Mack is a citizen of the United States of America.
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 466367109
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: As of March 31, 2026, Nantahala may be deemed to be the beneficial owner of 1,542,715 Shares held by funds and separately managed accounts under its control, and as the managing members of Nantahala, each of Messrs. Harkey and Mack may be deemed to be a beneficial owner of those Shares.
(b)	Percent of class: As of March 31, 2026, each of the Reporting Persons may be deemed to be the beneficial owner of the following percentage of the total number of Shares outstanding: (1) Nantahala Capital Management, LLC ("Nantahala") : 8.10% (2) Wilmot B. Harkey: 8.10% (3) Daniel Mack: 8.10%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: (1) Nantahala Capital Management, LLC ("Nantahala") : 0 Shares. (2) Wilmot B. Harkey: 0 Shares. (3) Daniel Mack: 0 Shares.
	(ii) Shared power to vote or to direct the vote: (1) Nantahala Capital Management, LLC ("Nantahala") : 1,542,715 Shares. (2) Wilmot B. Harkey: 1,542,715 Shares. (3) Daniel Mack: 1,542,715 Shares.
	(iii) Sole power to dispose or to direct the disposition of: (1) Nantahala Capital Management, LLC ("Nantahala") : 0 Shares. (2) Wilmot B. Harkey: 0 Shares. (3) Daniel Mack: 0 Shares.
	(iv) Shared power to dispose or to direct the disposition of: (1) Nantahala Capital Management, LLC ("Nantahala") : 1,542,715 Shares. (2) Wilmot B. Harkey: 1,542,715 Shares. (3) Daniel Mack: 1,542,715 Shares.
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. Each of Messrs. Harkey and Mack is filing this Schedule 13G as a control person in respect of shares beneficially owned by Nantahala, an investment adviser as described in ss. 240.13d-1(b)(1)(ii)(E). See Item 4(a).
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 acquired and are held in the ordinary course of business and 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.

Nantahala Capital Management, LLC

Signature:	/s/ Taki Vasilakis
Name/Title:	Taki Vasilakis / Chief Compliance Officer
Date:	05/15/2026

Wilmot B. Harkey

Signature:	/s/ Wilmot B. Harkey
Name/Title:	Wilmot B. Harkey
Date:	05/15/2026

Daniel Mack

Signature:	/s/ Daniel Mack
Name/Title:	Daniel Mack
Date:	05/15/2026