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Common Stock
 12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Common Stock Common Stock
Shelf Registration Statements
In November 2023, we filed a shelf registration statement on Form S-3 (the "2023 Shelf Registration Statement"). The 2023 Shelf Registration Statement permits the offering, issuance and sale of up to $250.0 million of common stock, preferred stock, warrants, debt securities, and/or units in one or more offerings and in any combination of the foregoing. As of January 31, 2024, the 2023 Shelf Registration statement has not been made effective, however, the Company can (i) continue to sell, subject to applicable SEC requirements, unsold securities remaining on the expiring 2020 Shelf Registration Statement; and (ii) offer and sell additional securities to be registered on the new Form S-3.
In November 2020, we filed a shelf registration statement on Form S-3 (the "2020 Shelf Registration Statement"). The 2020 Shelf Registration Statement permits the offering, issuance and sale of up to $250.0 million of common stock, preferred stock, warrants, debt securities, and/or units in one or more offerings and in any combination of the foregoing. As of December 31, 2024, there is $75.0 million remaining on this shelf registration statement.
In December 2020, we filed a Prospectus Supplement for the offering, issuance and sale of up to a maximum aggregate offering price of $50.0 million of common stock that may be issued and sold under an at-the-market sales agreement with SVB Leerink LLC (now Leerink Partners LLC) as agent ("December 2020 ATM"). We have used and intend to continue to use the net proceeds from the December 2020 ATM to continue to fund the ongoing clinical development of our product candidates and for other general corporate purposes, including funding existing and potential new clinical programs and product candidates. The December 2020 ATM will terminate upon the earlier of (i) the issuance and sale of all of the shares through Leerink Partners LLC on the terms and subject to the conditions set forth in the December 2020 ATM or (ii) termination of the December 2020 ATM as otherwise permitted thereby. The December 2020 ATM may be terminated at any time by either party upon ten days’ prior notice, or by Leerink Partners LLC at any time in certain circumstances, including the occurrence of a material adverse effect on us. As of December 31, 2024, $7.5 million in capacity remains under the December 2020 ATM.

In May 2022, the Company filed a Prospectus Supplement for the offering, issuance and sale of up to a maximum aggregate offering price of $80.0 million of common stock that may be issued and sold under another at-the-market sales agreement ("May 2022 ATM") with Leerink Partners LLC (formerly SVB Leerink LLC) as agent. The Company intends to use the net proceeds from the offering to continue to fund the ongoing clinical development of its product candidates and for other general corporate purposes, including funding existing and potential new clinical programs and product candidates. The May 2022 ATM will terminate upon the earlier of (i) the issuance and sale of all of the shares through Leerink Partners LLC on the terms and subject to the conditions set forth in the May 2022 ATM or (ii) termination of the May 2022 ATM as otherwise permitted thereby. The May 2022 ATM may be terminated at any time by either party upon ten days’ prior notice, or by Leerink Partners LLC at any time in certain circumstances, including the occurrence of a material adverse effect on the Company. As of December 31, 2023, $80.0 million in capacity remains under the May 2022 ATM.
  The Company has agreed to pay Leerink Partners LLC a commission equal to 3.0% of the gross proceeds from the sales of common shares pursuant to both ATM's and has agreed to provide Leerink Partners LLC with customary indemnification and contribution rights.
For the year ended December 31, 2023, we raised gross proceeds of $0.9 million pursuant to the December 2020 ATM through the sale of 657,012 shares of common stock at a weighted average price of $1.34 per share. The net proceeds from the December 2020 ATM were $0.9 million after deducting underwriter commissions of $26,000.
For the year ended December 31, 2022, the Company raised gross proceeds of $40.9 million pursuant to the December 2020 ATM through the sale of 4,204,113 shares of common stock at a weighted average price of $9.72 per share. The net proceeds from the December 2020 ATM were $39.6 million after deducting underwriter commissions of $1.2 million.
Equity Offerings
Private Placement of up to $240 million

On January 4, 2024, Immunic entered into a Securities Purchase Agreement with select accredited investors, pursuant to which the Company agreed to issue and sell to the Investors in a three-tranche private placement shares of the Company’s common stock, $0.0001 par value per share or in lieu thereof, pre-funded warrants to purchase shares of Common Stock. The Pre-Funded Warrants are exercisable immediately for $0.0001 per share and until exercised in full.

•The first tranche, which closed on January 8, 2024, resulted in the purchase by the Investors of an aggregate of $80 million of Common Stock (or Pre-Funded Warrants) from the Company at a price of $1.43 per share;
•The second tranche is a conditional mandatory purchase by the Investors of an additional $80 million of Common Stock (or Pre-Funded Warrants) from the Company at a price of $1.716 per share, equal to 120% of the price paid in the first tranche and is subject to the satisfaction of three conditions:
◦release by the Company of topline data from its Phase 2b clinical trial of vidofludimus calcium (IMU-838) in progressive multiple sclerosis, which data is currently expected in or around April 2025;
◦the 10-day volume-weighted average price of the Common Stock is at least $8.00 per share during the 6 months following the data release; and
◦aggregate trading volume during the same 10-day period is at least $100 million.
•The third tranche must occur no later than three years after the second tranche and is conditioned on the same volume-weighted average share price and minimum trading volumes as the second tranche. The third tranche provides for the issuance of $80 million of shares of common stock (or pre-funded warrants) at the same price per share as the second tranche, but permits investors to fund their purchase obligations on a “cashless” or net settlement basis, which would reduce the cash proceeds to be raised by the Company in the Private Placement.
Any of the conditions in the second or third tranches can be waived by holders of a majority of the outstanding securities (including the lead Investor).

The Private Placement resulted in gross proceeds to the Company of approximately $80 million in the first tranche, and an additional $80 million if and when the second tranche occurs. Assuming that the second tranche is completed and conditions for the third tranche are satisfied or waived, the Company could receive up to an additional $80 million in the third tranche. However, the amount of cash received in the third tranche would depend on the extent to which the Investors elect to fund the third tranche through a “cashless” or net settlement basis. Therefore, total gross proceeds from the offering to the Company could actually be between $80 million and $240 million. Gross proceeds to the Company will be reduced by fees paid to the placement agents, capital markets advisors and payments of transaction expenses. The Company intends to use the net proceeds from the Private Placement to fund the ongoing clinical development of its three lead product candidates, vidofludimus calcium (IMU-838), IMU-856 and IMU-381, and for other general corporate purposes
$60 million Private Placement Equity Financing
On October 10, 2022, Immunic entered into a Securities Purchase Agreement (the “Purchase Agreement”) for a private placement (the “Private Placement”) with select accredited investors and certain existing investors (each, a “Purchaser” and collectively, the “Purchasers”). Pursuant to the Purchase Agreement, the Company agreed to sell to the Purchasers (i) 8,696,552 shares of the Company’s common stock, par value $0.0001 per share (the “Shares”), at a purchase price of $4.35 per Share, and (ii) 5,096,552 pre-funded warrants (the “Pre-Funded Warrants”) to purchase Common Stock (the “Warrant Shares” and together with the Shares and the Pre-Funded Warrants, the “Securities”), at a purchase price of $4.34 per Pre-Funded Warrant. The Pre-Funded Warrants have an exercise price of $0.01 per share of Common Stock, be immediately exercisable and remain exercisable until exercised in full. The holders of Pre-Funded Warrants may not exercise a Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise. The holders of Pre-Funded Warrants may increase or decrease such percentages not in excess of 19.99% by providing at least 61 days’ prior notice to the Company. The Pre-Funded Warrants are classified as a component of permanent equity because they are freestanding financial instruments that are legally detachable and separately exercisable from the shares of common stock with which they were issued, are immediately exercisable, do not embody an obligation for the Company to repurchase its shares, and permit the holders to receive a fixed number of shares of common stock upon exercise. In addition, the Pre-Funded Warrants do not provide any guarantee of value or return. All of the pre-funded warrants were exercised in January of 2023.

The Private Placement closed on October 12, 2022. The gross proceeds of the Private Placement were approximately $60.0 million, before deducting offering expenses payable by the Company of approximately $4.0 million. The Company intends to use the net proceeds from the Private Placement to fund the ongoing clinical development of its three lead product candidates, vidofludimus calcium (IMU-838), izumerogant (IMU-935) and IMU-856, and for other general corporate purposes.

The registration statement for these securities was deemed effective by Securities and Exchange Commission on December 20, 2022.
Common Stock
As of December 31, 2022, the Company’s certificate of incorporation, as amended and restated, authorized the Company to issue 130,000,000 shares of common stock, par value of $0.0001. The voting, dividend and liquidation rights of the holders of the Company’s common stock are subject to and qualified by the rights, powers and preferences of any holders of preferred stock.
Each share of common stock entitles the holder to one vote on all matters submitted to a vote of the Company’s stockholders. Common stockholders are entitled to receive dividends, as may be declared by the board of directors, if any. Through December 31, 2023, no cash dividends had been declared or paid.
In a definitive proxy statement filed on February 5, 2024, for a special meeting of stockholders (the “Special Meeting”), the Company submitted a proposed amendment of Immunic’s amended and restated certificate of incorporation to increase the total number of authorized shares of common stock, $0.0001 par value per share, from 130,000,000 shares to 500,000,000; the Special Meeting date is set for March 4, 2024 with a record date of January 19, 2024.
Preferred Stock
The Company’s certificate of incorporation, as amended and restated, authorizes the Company to issue 20,000,000 shares of $0.0001 par value preferred stock, rights and preferences to be set by the board of directors. No preferred shares were outstanding as of December 31, 2023.
Stock Reserved for Future Issuance
Shares reserved for future issuance as of December 31, 2023 are as follows:
 Number of
Shares
Common stock reserved for issuance for:
2021 Employee stock purchase plan11 
Outstanding stock options6,196,140 
Common stock options available for future grant:
2014 Equity Incentive Plan43,311 
2017 Inducement Equity Incentive Plan46,250 
2019 Omnibus Equity Incentive Plan, as amended on June 28, 20234,153,689 
Total common shares reserved for future issuance10,439,401