Citadel Entities and Griffin Disclose Small Passive Holdings in ALT5 Sigma

Rhea-AI Filing Summary

Report summary: Several Citadel entities and Kenneth Griffin jointly report modest, passive holdings of ALT5 Sigma Corporation common stock based on a 122,609,376 share count. Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC each report beneficial ownership of 73,677 shares representing 0.1% of the class. Citadel Securities LLC, Citadel Securities Group LP and Citadel Securities GP LLC each report beneficial ownership of 208,930 shares representing 0.2% of the class. Mr. Kenneth Griffin is reported as beneficially owning 282,607 shares representing 0.2% of the class.

The filing states these holdings are held through Citadel Multi-Strategy Equities Master Fund Ltd. and Citadel Securities and that the reporting persons assert shared voting and dispositive power over the reported shares but no sole voting or sole dispositive power. The filing also clarifies the reporting persons do not claim the holdings were acquired to influence control of the issuer.

Positive

• Transparent joint disclosure of ownership across multiple Citadel entities and Kenneth Griffin
• Positions are clearly passive (Schedule 13G) and the filing states shares were not acquired to influence control
• Holdings are small relative to the total outstanding share count (0.1%–0.2%), minimizing market/control impact

Negative

• None.

Insights

Financial Analyst

TL;DR: Report shows small, passive stakes by Citadel-related entities and Kenneth Griffin, below 5%, so limited market impact.

The holdings disclosed are modest: 0.1% and 0.2% positions based on the stated 122,609,376 share base. Such magnitudes are generally immaterial to market control and unlikely to affect valuation or corporate strategy. The form used is a Schedule 13G, consistent with passive reporting; the certification affirms the stake is not intended to influence control. For investors, this filing signals disclosure and ownership transparency rather than strategic activism or governance change.

Corporate Governance Expert

TL;DR: Ownership is disclosed as shared power without sole control, indicating oversight but not control influence.

The filing identifies layered ownership and control relationships among Citadel entities and Mr. Griffin, and clarifies the reported shares are held with shared voting and dispositive power. The use of a joint filing and the certification language aligns with standard governance disclosure practices. Because each reported position is well below a 5% threshold, this disclosure does not signal a governance challenge or a change in board/control dynamics.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

ALT5 Sigma Corporation

(Name of Issuer)

Common Stock, par value $0.001 per share (the "Shares")

(Title of Class of Securities)

47089W104

(CUSIP Number)

08/12/2025

(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)

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Citadel Advisors 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 73,677.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 73,677.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

73,677.00

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)

0.1 %

12

Type of Reporting Person (See Instructions)

IA, HC, OO

Comment for Type of Reporting Person: The percentages reported in this Schedule 13G are based upon 122,609,376 Shares outstanding as of August 8, 2025 (according to the issuer's Form 10-Q as filed with the Securities and Exchange Commission on August 12, 2025). Except as described in the preceding sentence, all Shares for the holdings of the reporting persons reported in this Schedule 13G are as of the opening of the market on August 19, 2025.

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Citadel Advisors Holdings LP

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 73,677.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 73,677.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

73,677.00

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)

0.1 %

12

Type of Reporting Person (See Instructions)

HC, PN

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Citadel GP 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 73,677.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 73,677.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

73,677.00

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)

0.1 %

12

Type of Reporting Person (See Instructions)

HC, OO

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Citadel Securities 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 208,930.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 208,930.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

208,930.00

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)

0.2 %

12

Type of Reporting Person (See Instructions)

BD, OO

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Citadel Securities Group LP

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 208,930.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 208,930.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

208,930.00

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)

0.2 %

12

Type of Reporting Person (See Instructions)

HC, PN

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Citadel Securities GP 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 208,930.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 208,930.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

208,930.00

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)

0.2 %

12

Type of Reporting Person (See Instructions)

HC, OO

SCHEDULE 13G

CUSIP No. 47089W104

1

Names of Reporting Persons

Kenneth Griffin

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 282,607.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 282,607.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

282,607.00

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)

0.2 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ALT5 Sigma Corporation
(b)	Address of issuer's principal executive offices: 325 E. Warm Springs Road, Suite 102, Las Vegas, NV, 89119
Item 2.
(a)	Name of person filing: This Schedule 13G is being jointly filed by Citadel Advisors LLC ("Citadel Advisors"), Citadel Advisors Holdings LP ("CAH"), Citadel GP LLC ("CGP"), Citadel Securities LLC ("Citadel Securities"), Citadel Securities Group LP ("CALC4"), Citadel Securities GP LLC ("CSGP"), and Mr. Kenneth Griffin (collectively with Citadel Advisors, CAH, CGP, Citadel Securities, CALC4 and CSGP, the "Reporting Persons") with respect to the Shares of the above-named issuer owned by Citadel Multi-Strategy Equities Master Fund Ltd., a Cayman Islands company ("CM"), and Citadel Securities. Such owned Shares may include other instruments exercisable for or convertible into Shares. Citadel Advisors is the portfolio manager for CM. CAH is the sole member of Citadel Advisors. CGP is the general partner of CAH. CALC4 is the non-member manager of Citadel Securities. CSGP is the general partner of CALC4. Mr. Griffin is the President and Chief Executive Officer of CGP, and owns a controlling interest in CGP and CSGP. The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities actually owned by such person (if any).
(b)	Address or principal business office or, if none, residence: The address of each of the Reporting Persons is 830 Brickell Plaza, Miami, Florida 33131.
(c)	Citizenship: Each of Citadel Advisors, CGP, Citadel Securities and CSGP is organized as a limited liability company under the laws of the State of Delaware. Each of CALC4 and CAH is organized as a limited partnership under the laws of the State of Delaware. Mr. Griffin is a U.S. citizen.
(d)	Title of class of securities: Common Stock, par value $0.001 per share (the "Shares")
(e)	CUSIP No.: 47089W104
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. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own 73,677 Shares. 2. Citadel Securities LLC may be deemed to beneficially own 208,930 Shares. 3. Each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own 208,930 Shares. 4. Mr. Griffin may be deemed to beneficially own 282,607 Shares.
(b)	Percent of class: 1. The number of Shares that each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own constitutes 0.1% of the Shares outstanding. 2. The number of Shares that Citadel Securities LLC may be deemed to beneficially own constitutes 0.2% of the Shares outstanding. 3. The number of Shares that each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own constitutes 0.2% of the Shares outstanding. 4. The number of Shares that Mr. Griffin may be deemed to beneficially own constitutes 0.2% of the Shares outstanding.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0 2. Citadel Securities LLC: 0 3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0 4. Mr. Griffin: 0
	(ii) Shared power to vote or to direct the vote: 1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 73,677 2. Citadel Securities LLC: 208,930 3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 208,930 4. Mr. Griffin: 282,607
	(iii) Sole power to dispose or to direct the disposition of: 1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0 2. Citadel Securities LLC: 0 3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0 4. Mr. Griffin: 0
	(iv) Shared power to dispose or to direct the disposition of: 1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 73,677 2. Citadel Securities LLC: 208,930 3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 208,930 4. Mr. Griffin: 282,607
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.
	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.

Citadel Advisors LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/19/2025

Citadel Advisors Holdings LP

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/19/2025

Citadel GP LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/19/2025

Citadel Securities LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/19/2025

Citadel Securities Group LP

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/19/2025

Citadel Securities GP LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/19/2025

Kenneth Griffin

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, attorney-in-fact*
Date:	08/19/2025

Comments accompanying signature: * Seth Levy is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Advisors LLC on Schedule 13G for Allakos Inc. on October 13, 2023.

Exhibit Information

Exhibit 99.1 - Joint Filing Agreement

FAQ

How many ALT5 Sigma (JAN) shares do Citadel entities report owning?

The filing reports 73,677 shares for Citadel Advisors-related entities and 208,930 shares for Citadel Securities-related entities.

What stake does Kenneth Griffin report in ALT5 Sigma (JAN)?

Kenneth Griffin is reported as beneficially owning 282,607 shares, representing 0.2% of the class.

Are these holdings reported as passive or active under SEC rules?

The statement is filed on Schedule 13G, and the certifications state the holdings were not acquired to influence control, indicating passive reporting.

Do any reporting persons claim sole voting or dispositive power?

No. The filing shows 0 sole voting power and 0 sole dispositive power for the reporting persons; all reported power is shared.

What share count was used to calculate the percentages?

The percentages are based on 122,609,376 shares outstanding as stated in the filing.