ALT5 Sigma suspends CEO; Jonathan Hugh named Acting CEO 10/16

ALT5 Sigma Corporation announced a leadership change.

Rhea-AI Filing Summary

ALT5 Sigma Corporation announced a leadership change. On October 16, 2025, the Board suspended Peter Tassiopoulos and removed his duties as Chief Executive Officer, effective immediately and with pay. The company appointed Jonathan Hugh to assume those duties as Acting Chief Executive Officer. Hugh will continue in his current role while carrying these additional responsibilities.

This update reflects a governance action under Item 5.02. The company lists its common stock on The Nasdaq Stock Market under the symbol ALTS. The filing was signed by Acting Chief Executive Officer and Chief Financial Officer Jonathan Hugh.

Insights

Corporate governance analyst

CEO suspended; CFO assumes acting CEO role for continuity.

The Board suspended the CEO on October 16, 2025 with pay and reassigned chief executive duties to Jonathan Hugh as Acting CEO. This concentrates leadership in a single executive who also serves as CFO, which can streamline decisions but may stretch capacity.

The move is under Item 5.02, indicating a board-level governance action. No rationale or strategic shift is detailed in the excerpt, so operational impact is not defined.

The signature by Hugh dated October 22, 2025 confirms the transition in place. Subsequent disclosures may clarify duration of the acting role and any further board decisions.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

FAQ

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

What leadership change did ALTS disclose?

On October 16, 2025, ALTS suspended CEO Peter Tassiopoulos with pay and reassigned CEO duties to Jonathan Hugh as Acting CEO.

Is the CEO suspension at ALT5 Sigma effective immediately?

Yes. The company states the suspension is effective immediately and with pay.

What role does Jonathan Hugh hold at ALTS in addition to Acting CEO?

Jonathan Hugh remains in his current position (also CFO) while carrying out the additional Acting CEO responsibilities.

What SEC item covers ALTS’s disclosure?

The change is disclosed under Item 5.02: Departure or appointment of certain officers and compensatory arrangements.

What is ALT5 Sigma’s stock symbol and exchange?

ALT5 Sigma’s common stock trades on The Nasdaq Stock Market under the symbol ALTS.

Who signed the filing for ALT5 Sigma?

The filing was signed by /s/ Jonathan Hugh, Acting Chief Executive Officer; Chief Financial Officer, dated October 22, 2025.

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

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Accepted by SEC EDGAR 10/22/2025 - 05:28 PM Learn about SEC filing dates

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) October 16, 2025

ALT5 SIGMA CORPORATION

(Exact name of registrant as specified in its charter)

Nevada		000-19621		41-1454591
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

325 E. Warm Spring Road, Suite 102 Las Vegas, NV		89119
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code (702) 997-5968

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common stock (par value $0.001 per share)		ALTS		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On October 16, 2025, Peter Tassiopoulos was suspended by the Board of Directors of Alt5 Sigma Corporation (the “Company”) and removed of his duties as Chief Executive Officer. His suspension is effective immediately, with pay. Jonathan Hugh has assumed Mr. Tassiopoulos’s duties as Acting Chief Executive Officer. Mr. Hugh will remain in his current position while carrying out such additional responsibilities.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ALT5 SIGMA CORPORATION
Date: October 22, 2025	By:	/s/ Jonathan Hugh
		Jonathan Hugh
		Acting Chief Executive Officer; Chief Financial Officer