ALT5 Sigma Corp

On January 7, 2026, Company received a delinquency notification letter from the Listing Qualifications Staff of the Nasdaq Stock Market LLC (the “Nasdaq”) due to the Company’s non-compliance with Nasdaq Listing Rule 5620(a) and 5810(c)(2)(G) (the “Listing Rule”) as a result of the Company’s failure to hold an annual meeting of stockholders within twelve months of the end of the Company’s fiscal year end. As set forth in the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on January 2, 2026, the Company is holding its Annual Meeting of Stockholders on February 27, 2026.

The Company, per the delinquency notification letter, must submit a plan regarding regaining compliance within 45 days of the letter. If the plan is accepted, the Company will have 180 calendar days, or until June 26, 2026, to regain compliance. The Company intends to file a plan of compliance, and cure the deficiency by holding its Annual Meeting of Stockholders on February 27, 2026. The deficiency notice has no immediate effect on the listing or trading of the Company’s common stock on The Nasdaq Capital Market.