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PREFERRED STOCK | 12 Months Ended
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Dec. 31, 2025
Equity [Abstract] |
PREFERRED STOCK | 10. PREFERRED STOCK Convertible Preferred Stock – Financing History Historically, the Company has issued several Series of convertible preferred stock to investors (A, B, C, C-1, D, D-1, D-2, E, F-1, F-2, G, G-1, and H) as its primary financing vehicle to fund research and development and commercial stage maturity. For descriptions and discussion of Series preceding Series H, refer to the Capital Stock footnote in the Company's annual financial statements for the year ended December 31, 2024 contained in the prospectus filed on July 3, 2025 with the Securities and Exchange Commission, as part of the Company's Registration Statement (File No. 333-287148). As of December 31, 2024, the Company had 14,461,804 shares of Series H Preferred Stock (“Series H”), par value $0.001 per share, for an original issue price of $4.83 per share. These shares were issued to various investors in the period of November 2019 to December 31, 2024 pursuant to the original financing round and subsequent extensions thereof, resulting in proceeds of $69,829 (net of issuance costs of zero) as of December 31, 2024. There were no issuances of Series H in the year ended December 31, 2025. Immediately prior to the closing of the Company’s IPO on July 3, 2025 and upon the receipt by the Company of a written request consented to by holders of a majority of the Preferred Stock on July 2, 2025, all shares of the Company’s then-outstanding convertible preferred stock converted into shares of the Company’s common stock. Under the Company’s Amended and Restated Certificate of Incorporation, the Company is authorized to issue none and 153,682,280 shares of $0.001 par value convertible preferred stock as of December 31, 2025, and December 31, 2024, respectively. Convertible preferred stock outstanding as of December 31, 2024 consisted of the following (in thousands, except share amounts.)
Series |  | Year |  | Shares |  | Liquidation |  | Carrying
Preferred |  | Issued |  | Authorized |  | Outstanding |  | Amount |  | Value
Series A |  | 2006 |  | 17,962,675 |  | 5,394,197 |  | $ | 4,850 |  |  | $ | 4,850 |
Series B |  | 2008 |  | 6,000,000 |  | 1,801,802 |  | $ | 4,319 |  |  | $ | 4,319 |
Series C |  | 2010 |  | 5,747,127 |  | 880,187 |  | $ | 2,550 |  |  | $ | 2,550 |
Series C-1 |  | 2011 |  | 3,876,405 |  | 848,599 |  | $ | 2,515 |  |  | $ | 2,515 |
Series D |  | 2011 |  | 2,222,222 |  | 520,519 |  | $ | 1,560 |  |  | $ | 1,560 |
Series D-1 |  | 2012 |  | 6,766,666 |  | 166,833 |  | $ | 500 |  |  | $ | 500 |
Series D-2* |  | 2012 |  | 11,083,333 |  | 2,920,649 |  | $ | 17,506 |  |  | $ | 8,753 |
Series E |  | 2014 |  | 14,000,000 |  | 4,151,977 |  | $ | 15,900 |  |  | $ | 15,900 |
Series F-1 |  | 2016 |  | 13,043,479 |  | 1,201,203 |  | $ | 4,600 |  |  | $ | 4,600 |
Series F-2 |  | 2016 |  | 12,000,000 |  | 2,498,498 |  | $ | 10,400 |  |  | $ | 10,400 |
Series G |  | 2018 |  | 5,926,000 |  | 1,779,559 |  | $ | 8,000 |  |  | $ | 8,000 |
Series G-1 |  | 2018 |  | 6,896,552 |  | 2,039,756 |  | $ | 9,849 |  |  | $ | 9,849 |
Series H |  | 2019 |  | 48,157,821 |  | 14,461,804 |  | $ | 69,829 |  |  | $ | 69,829 |
|  |  |  | 153,682,280 |  |  | 38,665,583 |  |  | $ | 152,378 |  |  | $ | 143,625 |
* Liquidation preference includes two times the original issue price per share. All Series of preferred stock are collectively referred to as the “Preferred Stock”. Convertible Preferred Stock - Conversion Rights Preferred Stock shares might be converted into shares of common stock at a ratio determined by dividing the original issuance price by the conversion price (the “Conversion Rate”). The conversion price was initially set at the original issuance price and might be adjusted downward, or upward, thereby reciprocally adjusting the Conversion Rate, for capital stock events such as stock splits, stock dividends, reorganizations, or other events where the consideration received relative to the number of shares issued would imperil or dilute holders of Preferred Stock. Thus, the Conversion Rate was 1:1 at original issuance. As further described in Note 3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, under the caption "Reverse Stock Split", the Company effectuated a reverse split of its issued and outstanding common stock which resulted in an automatic adjustment (reduction) to the Conversion Rates on all Series of Preferred Stock; there were no adjustments to Conversion Rates on any Series of Preferred Stock since original issuance and prior to the Reverse Stock Split. Preferred Stock shares converted to shares of common stock (i) electively, upon the receipt by the Company of a written request consented to by holders of at least a majority of the Preferred Stock then outstanding at the effective date specified in the request (provided further that such conversion should not occur for either of Series G-1 and Series H unless a majority of holders within each of those series so consents), or (ii) automatically, upon the closing of a firm commitment underwritten initial public offering pursuant to an effective registration statement filed under the Securities Act of 1933, as amended, provided that the offering price per share of common stock is not less than $9.66 or $9.99, depending on the Series (as adjusted for recapitalizations) and the aggregate gross proceeds to the Company are $25 million or greater. In connection with and prior to the amendment and restatement of the Company's amended and restated certificate of incorporation described in Note 3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, under the caption "Reverse Stock Split", the holders of all Series of the Company's Preferred Stock elected, via written action, to convert all issued and outstanding Preferred Stock to common stock contingent upon the Company completing a planned initial public offering of its common stock. Convertible Preferred Stock - Liquidation Preferences Liquidation, for purposes of liquidation preferences that favor holders of Preferred Stock, meant a liquidation, dissolution, or winding up of the Company, whether voluntary or involuntary, an acquisition of the Company by another entity (other than a transaction which does not result in a change in the holders of at least 50% of voting stock outstanding before and after the transaction), or the sale, lease, exclusive license, or conveyance of all or substantially all of the Company’s assets. The liquidation preference for each series of Preferred Stock was the sum of (i) the original issuance price per share (as adjusted for recapitalizations) – that is, one times the original issue price, and (ii) all declared but unpaid dividends, with the exception of Series D-2, where the liquidation preference includes two times the original issue price per share. Liquidation preferences were rank-ordered by priority group - first: Series E, F-1, F-2, G, G-1 and H; second: Series D-2; third: Series D and D-1; fourth and last: Series A, B, C, and C-1. Should distributable assets upon liquidation be insufficient to satisfy respective liquidation preferences within a priority group, the distributable assets were to be distributed to the stockholders within the priority group pro rata and in relationship to the proportion of available distributable assets to the full liquidation preferences that would otherwise be due. When distributable assets were sufficient for a priority group, the remaining distributable assets cascaded to the next priority group, and so on and so forth in descending order of priority group. Should remaining distributable assets exist, after satisfying the liquidation preferences of all Preferred Stock, such remainder were distributable to the holders of the Preferred Stock and common stock in proportion to the number of shares of common stock held by them on a combined basis, with the shares of Preferred Stock being treated as if converted. Convertible Preferred Stock – Dividends Outstanding shares of Preferred Stock were entitled to receive dividends, when, as and if declared by the Board of Directors at a dividend rate of 8.00% payable in preference and priority to any declaration or payment of any distribution related to common stock. The dividends were not cumulative and Preferred Stockholders did not acquire rights to dividends because they were not declared or paid in any given year. The Company has never declared or paid any dividends. Convertible Preferred Stock - Voting Rights The holders of Preferred Stock had the same voting rights as the holders of common stock, on an as-converted basis at the then-prevailing Conversion Rate. As of December 31, 2024, the Board of Directors of the Company comprised eight members. Each holder of convertible preferred stock was entitled to the number of votes equal to the number of common stock shares into which the referred shares held by such holder converted. The holders of a majority of the voting shares were able to elect all of the directors. Convertible Preferred Stock - Protective Provisions As long as any Preferred Stock was issued and outstanding, the Company should not, without first obtaining the approval (by vote or written consent) of the holders of a majority of outstanding shares of Preferred Stock, voting together as a single class: •Amend, alter or repeal any provision of the certificate of incorporation or bylaws (including pursuant to a merger) if such action would adversely affect the Preferred Stock; •Increase or decrease the authorized number of shares of Preferred Stock (including any series thereof) or common stock; •Authorize or create any new class or series of shares having rights, preferences or privileges senior to or on parity with any series of Preferred Stock; •Voluntarily liquidate or dissolve, or enter into any transaction or series of related transactions deemed to be a liquidation, dissolution or any disposition of the Company’s property; •Effect a firm commitment underwritten initial public offering pursuant to an effective registration statement filed under the Securities Act of 1933; •Enter into any transaction (other than customary service or employment agreements) with any officer or director of the Company, or any party related thereto or affiliated therewith, unless approved by a majority of the Board of Directors; •Issue any indebtedness that is convertible into any equity security, or incur any other indebtedness other than loans, leases and similar transactions in the ordinary course of business; and •Redeem, repurchase or otherwise acquire any shares of Preferred Stock or common stock, except for the repurchase of shares of common stock from employees, officers, directors, consultants or other persons performing services pursuant to agreements granting the Company option or repurchase rights upon the occurrence of certain events.

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