ALT5 Sigma Corp

Regulatory Filings • Oct 22, 2025

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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. ☐

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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.

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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.

| /s/
Jonathan Hugh |
| --- |
| Jonathan Hugh |
| Acting
Chief Executive Officer; Chief Financial Officer |

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