Note 8—Stockholders’ Equity

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Serial Preferred Stock

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Our authorized capital stock includes 10,000,000 shares of serial preferred stock, with a par value of $0.001 per share. No shares of preferred stock were outstanding as of December 27, 2025 or December 28, 2024.

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On April 17, 2017, we entered into a rights agreement (as amended from time to time, the “Rights Agreement”) with Computershare Trust Company, N.A., as rights agent. In connection with the adoption of the Rights Agreement and pursuant to its terms, our board of directors authorized and declared a dividend of one right (each, a “Right”) for each outstanding share of our common stock to stockholders of record at the close of business on May 18, 2017 (the “Record Date”), and authorized the issuance of one Right for each share of our common stock issued by us (except as otherwise provided in the Rights Agreement) between the Record Date and the Distribution Date (as defined below).

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On April 17, 2024, we entered into a fourth amendment (the “Fourth Amendment”) to the Rights Agreement, pursuant to which Equiniti Trust Company, LLC was appointed as our rights agent and the definition of “Expiration Date” in the Rights Agreement was amended to extend the term for an additional three-year period from April 17, 2024 to April 17, 2027. As a result, and pursuant to the Fourth Amendment, the Rights

will expire and become unexercisable on or before the close of business on April 17, 2027, in accordance with the terms of the Rights Agreement.

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Each Right entitles the registered holder, subject to the terms of the Rights Agreement, to purchase from us, when exercisable and subject to adjustment, one unit consisting of one one-thousandth of a share (a “Unit”) of our Series A Preferred Stock (the “Preferred Stock”), at a purchase price of $6.56 per Unit, subject to adjustment. Subject to the provisions of the Rights Agreement, including certain exceptions specified therein, a distribution date for the Rights (the “Distribution Date”) will occur upon the earlier of (i) 10 business days following a public announcement that a person or group of affiliated or associated persons (an “Acquiring Person”) has acquired or otherwise obtained beneficial ownership of 15% or more of the then-outstanding shares of our common stock, and (ii) 10 business days (or such later date as may be determined by our board of directors) following the commencement of a tender offer or exchange offer that would result in a person or group becoming an Acquiring Person. The Rights are not exercisable until the Distribution Date and, unless earlier redeemed or exchanged by us pursuant to the terms of the Rights Agreement, as amended, will expire on the close of business on April 17, 2027.

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In connection with the adoption of the Rights Agreement, our board of directors approved a Certificate of Designation of the Series A Preferred Stock (the “Certificate of Designation”) designating 1,000,000 shares of our serial preferred stock as Series A Preferred Stock and setting forth the rights, preferences and limitations of the Preferred Stock. We filed the Certificate of Designation with the Secretary of State of the State of Delaware on April 17, 2017.

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Common Stock

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On September 24, 2025, our stockholders approved the Certificate of Amendment to the Certificate of Incorporation to increase the number of shares of common stock authorized for issuance from 450,000,000 to 675,000,000.

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October 2025 Offering

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On October 6, 2025, we entered into a Securities Purchase Agreement (the “October 2025 Purchase Agreement”) with certain investors (collectively, the “October 2025 Purchasers”), pursuant to which we issued and sold to the October 2025 Purchasers in a registered offering (the “October 2025 Offering”) an aggregate of (i) 14,285,716 shares of our common stock and (ii) Common Stock Purchase Warrants (the “October 2025 Warrants”) to purchase up to an aggregate of 28,571,432 shares of our common stock (the “October 2025 Warrant Shares”) at a combined purchase price of $0.70 per share and accompanying October 2025 Warrant. The October 2025 Offering closed on October 7, 2025. The net proceeds to us from the October 2025 Offering were approximately $9.3 million, after deducting placement agent fees and offering costs paid by us.

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The October 2025 Warrants are exercisable at any time on or after the issuance date, have a term of five years from the issuance date, have an exercise price of $0.70 per share, contain customary 4.99%/9.99% blocker provisions and provide for the cash payment of the Black-Scholes value of the October 2025 Warrants upon the occurrence of certain fundamental transactions. The exercise price and the number of October 2025 Warrant Shares issuable upon exercise of the October 2025 Warrants are subject to adjustment in the event of, among other things, certain transactions affecting our common stock (including without limitation stock splits and stock dividends). In addition, the exercise price of the October 2025 Warrants is subject to reduction in the event of certain common stock and common stock equivalent issuances, other than certain agreed exempt issuances, at a price lower than the exercise price of the October 2025 Warrants then in effect.

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The October 2025 Purchase Agreement also provided that we could not, subject to the exceptions described in the October 2025 Purchase Agreement (including an exception permitting us to utilize the March 2025 Purchase Agreement following the expiration of the 90-day period following the closing of the October 2025

Offering), effect or enter into any Variable Rate Transactions (as defined in the October 2025 Purchase Agreement) until the six-month anniversary of the closing date of the October 2025 Offering.

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The October 2025 Warrants were accounted for as equity classified financial instruments as they meet the requirements for equity classification under ASC 815, Derivatives and Hedging.

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June 2025 Offering

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On June 24, 2025, we entered into a Securities Purchase Agreement (the “June 2025 Purchase Agreement”) with certain investors, including Chun K. Hong, Chairperson of our board of directors, President and Chief Executive Officer (collectively, the “June 2025 Purchasers”), pursuant to which we issued and sold to the June 2025 Purchasers in a registered offering (the “June 2025 Offering”) an aggregate of (i) Common Stock Purchase Warrants (the “June 2025 Warrants”) to purchase up to an aggregate of 34,285,720 shares of our common stock (the “June 2025 Warrant Shares”) at a combined purchase price of $0.70 per share and accompanying June 2025 Warrant. Mr. Hong purchased $3.0 million of shares and accompanying June 2025 Warrants in the June 2025 Offering. The June 2025 Offering closed on June 25, 2025. The net proceeds to us from the June 2025 Offering were approximately $11.6 million, after deducting placement agent fees and offering costs paid by us.

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The June 2025 Warrants are exercisable at any time on or after the issuance date, have a term of five years from the issuance date, have an exercise price of $0.70 per share, contain customary 4.99%/9.99% blocker provisions and provide for the cash payment of the Black-Scholes value of the June 2025 Warrants upon the occurrence of certain fundamental transactions. The exercise price and the number of June 2025 Warrant Shares issuable upon exercise of the June 2025 Warrants are subject to adjustment in the event of, among other things, certain transactions affecting our common stock (including without limitation stock splits and stock dividends). In addition, the exercise price of the June 2025 Warrants is subject to reduction in the event of certain common stock and common stock equivalent issuances, other than certain agreed exempt issuances, at a price lower than the exercise price of the June 2025 Warrants then in effect. Furthermore, if at any time on or after the date of issuance there occurs any Share Combination Event and the lowest daily volume weighted average price of our common stock during the period commencing on the trading day immediately following the applicable Share Combination Event and ending on the fifth trading day immediately following the applicable Share Combination Event is less than the exercise price of the June 2025 Warrants then in effect, then the exercise price of the June 2025 Warrants will be reduced to the lowest daily volume weighted average price of our common stock during such period.

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The June 2025 Warrants were accounted for as equity classified financial instruments as they meet the requirements for equity classification under ASC 815, Derivatives and Hedging.

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On October 6, 2025, we amended the June 2025 Warrants. Some of the purchasers pursuant to the October 2025 Purchase Agreement are also holders of the June 2025 Warrants and were purchasers pursuant a securities purchase agreement dated October 11, 2024 (the “October 2024 Purchase Agreement”). Pursuant to the terms of the October 2025 Purchase Agreement, these holders agreed to waive certain variable rate prohibitions and participation rights set forth in the October 2024 Purchase Agreement relating to the October 2025 Offering and to, among other things, revise certain anti-dilution provisions relating to the June 2025 Warrants in exchange for our reduction of the exercise price of the June 2025 Warrants to an exercise price equal to the lesser of $0.60 and the lowest VWAP of the shares of common stock on any trading day during the period commencing on October 6, 2025 and including, the fourth trading day immediately following October 7, 2025 (such waivers and amendments, collectively the “Waiver and Amendment”). Additionally, on October 6, 2025, the remaining holders of the June 2025 Warrants who are not party to the October 2025 Purchase Agreement also entered into waiver and amendment agreements, pursuant to which they agreed to the Waiver and Amendment. The adjusted exercise price of the June 2025 Warrants is now $0.60. The June 2025 Warrants may be further adjusted for future dilutive issuances. In connection with the amendment of the June 2025 Warrants, we recorded a noncash deemed dividend of $0.6 million based on the excess of the fair

value of the June 2025 Warrants immediately before and after the amendment. Such noncash deemed dividend resulted in an increase in the net loss attributable to stockholders for the year ended December 27, 2025.

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The June 2025 Purchase Agreement provided that we could not, subject to the exceptions described in the June 2025 Purchase Agreement (including an exception permitting us to utilize the March 2025 Purchase Agreement following the expiration of the 90-day period following the closing of the June 2025 Offering), effect or enter into any Variable Rate Transactions (as defined in the June 2025 Purchase Agreement) until the six-month anniversary of the closing date of the June 2025 Offering.

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March 2025 Lincoln Park Purchase Agreement

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On March 13, 2025, we entered into a purchase agreement (the “March 2025 Purchase Agreement”) with Lincoln Park Capital Fund, LLC (“Lincoln Park”), pursuant to which we have the right to sell to Lincoln Park up to an aggregate of $75 million in shares of our common stock, subject to the conditions and limitations set forth in the March 2025 Purchase Agreement.  Concurrent with the execution of the March 2025 Purchase Agreement, we also entered into a registration rights agreement with Lincoln Park relating to the common stock to be sold to Lincoln Park. As consideration for entering into the March 2025 Purchase Agreement, we issued to Lincoln Park 1,123,023 shares of our common stock as initial commitment shares, which had an insignificant value upon grant, in a noncash transaction on March 13, 2025 and agreed to issue up to 1,123,023 additional shares of our common stock as additional commitment shares on a pro rata basis in connection with any additional purchases.

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Pursuant to the March 2025 Purchase Agreement, on any business day and as often as every other business day over the 36-month term of the March 2025 Purchase Agreement, we have the right, from time to time, at our sole discretion and subject to certain conditions, to direct Lincoln Park to purchase up to 750,000 shares of our common stock, provided Lincoln Park’s obligation under any single such purchase will not exceed $3.0 million, unless we and Lincoln Park mutually agree to increase the maximum amount of such single regular purchase. If we direct Lincoln Park to purchase the maximum number of shares of common stock it then may sell in a regular purchase, then in addition to such regular purchase, and subject to certain conditions and limitations in the March 2025 Purchase Agreement, we may direct Lincoln Park to purchase an additional amount of common stock that may not exceed the lesser of (i) 300% of the number of shares purchased pursuant to the corresponding regular purchase or (ii) 30% of the total number of shares of our common stock traded during a specified period on the applicable purchase date as set forth in the March 2025 Purchase Agreement. Under certain circumstances and in accordance with the March 2025 Purchase Agreement, we may direct Lincoln Park to purchase shares in multiple accelerated purchases on the same trading day.

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We control the timing and amount of any sales of our common stock to Lincoln Park. There is no upper limit on the price per share that Lincoln Park must pay for our common stock under the March 2025 Purchase Agreement, but in no event will shares be sold to Lincoln Park on a day the closing price is less than the floor price specified in the March 2025 Purchase Agreement. In all instances, we may not sell shares of our common stock to Lincoln Park under the March 2025 Purchase Agreement if that would result in Lincoln Park beneficially owning more than 9.99% of its common stock.

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The March 2025 Purchase Agreement does not limit our ability to raise capital from other sources at our sole discretion, except that, subject to certain exceptions, we may not enter into any Variable Rate Transaction (as defined in the March 2025 Purchase Agreement, including the issuance of any floating conversion rate or variable priced equity-like securities) during the 36 months after the date of the March 2025 Purchase Agreement. We have the right to terminate the March 2025 Purchase Agreement at any time, at no cost to us.

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During the fiscal year ended, December 27, 2025, Lincoln Park purchased an aggregate of 1,496,009 shares of our common stock for a net purchase price of approximately $1.3 million under the March 2025 Purchase Agreement.

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We evaluated the March 2025 Purchase Agreement that includes the right to require Lincoln Park to purchase shares of our common stock in the future (“put right”) considering the guidance in ASC 815-40, Derivatives and Hedging – Contracts on an Entity’s Own Equity, and concluded that is an equity-linked contract that does not qualify for equity classification, and therefore requires fair value accounting as a derivative asset (liability). We have analyzed the terms of the put right and have concluded that it had insignificant value upon grant and as of December 27, 2025.

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Warrants

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Warrant activity during fiscal years 2025 and 2024 is as follows:

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During fiscal year 2025, in connection with the October 2025 Offering and June 2025 Offering, we issued warrants to purchase up to 28,571,432 and 34,285,720 shares of our common stock, respectively, with a weighted average exercise price of $0.65. During fiscal year 2024, in connection with the 2024 Offering, we issued warrants to purchase up to 27,272,728 shares of our common stock with a weighted average exercise price of $1.20. 13,636,364 of these warrants expired during fiscal year 2025.