The principal business address of each Reporting Person is c/o venBio Partners, LLC, 1700 Owens Street, Suite 595, San Francisco, California 94158.

The principal business of Fund I is to make strategic equity and equity-related investments principally in entities operating in the life sciences industry and/or assets relating thereto. The principal business of General Partner I is to act as the sole general partner of Fund I. The principal business of GP Ltd. I is to act as the sole general partner of General Partner I. The principal business of Fund II is to make strategic equity and equity-related investments principally in entities operating in the life sciences industry and/or assets relating thereto. The principal business of General Partner II is to act as the sole general partner of Fund II. The principal business of GP Ltd. II is to act as the sole general partner of General Partner II. The principal occupation of Corey Goodman is to manage General Partner I, GP Ltd. I, General Partner II and GP Ltd. II.

During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

During the last five years, none of the Reporting Persons has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Fund I, General Partner I, GP Ltd. I, Fund II, General Partner II and GP Ltd. II are each organized under the laws of the Cayman Islands. Mr. Goodman is a citizen of the United States of America.

Item 3 of the Schedule 13D is hereby amended and supplemented as follows: On October 14, 2026, Fund I entered into an exchange agreement (the "Exchange Agreement") with the Issuer, pursuant to which Fund I agreed to surrender 253,826 shares of Common Stock for no consideration, and the Issuer agreed to issue to Fund I a pre-funded warrant (the "Pre-Funded Warrant") to purchase up to 253,826 shares of Common Stock. Pursuant to the Exchange Agreement, the surrender of the shares of Common Stock and issuance of the Pre-Funded Warrant were expected to occur on or about October 15, 2026, subject to the satisfaction or waiver of the conditions set forth therein. The Pre-Funded Warrant has an exercise price of $0.001 per share and is exercisable at any time on or after the date of issuance. Pursuant to the terms of the Pre-Funded Warrant, Fund I may not exercise the Pre-Funded Warrant to the extent that, immediately prior to or following such exercise, Fund I, together with the other Attribution Parties (as defined in the Pre-Funded Warrant), beneficially owns or would beneficially own more than 9.99% of the shares of Common Stock outstanding or the combined voting power of all of the Issuer's securities outstanding, in each case after giving effect to such exercise. By written notice to the Issuer, Fund I may increase or decrease such limitation to a percentage not exceeding 19.99%, provided that any increase will not become effective until the 61st day after such notice is delivered to the Issuer. The Pre-Funded Warrant does not expire until exercised in full and may be exercised on a cashless basis in accordance with its terms. The foregoing descriptions of the Exchange Agreement and Pre-Funded Warrant do not purport to be complete and are qualified in their entirety by reference to the form of Exchange Agreement and form of Pre-Funded Warrant, which are filed hereto as Exhibit 99.3 and Exhibit 99.4, respectively, and are incorporated by reference herein.

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: The responses to Items 3 and 6 of this Amendment No. 2 are incorporated by reference herein. Mr. Goodman resigned from the Issuer's board of directors effective June 29, 2026.

Items 5(a)-(c) of the Schedule 13D are hereby amended and restated as follows: The information set forth in rows 7 through 13 of the cover pages to this Amendment No. 2 is incorporated by reference herein. The amounts reported herein include 129,260 shares of Common Stock issuable upon exercise of the Pre-Funded Warrant due to the 9.99% beneficial ownership limitation described in Item 6 of this Amendment No. 2.

Fund I directly holds 3,715,963 shares of Common Stock and the Pre-Funded Warrant to purchase 253,826 shares of Common Stock. venBio SPV, LLC ("SPV") directly holds 461,811 shares of Common Stock. As the sole owner of SPV, Fund I may be deemed to beneficially own the shares of Common Stock directly held by SPV. As the sole general partner of Fund I, General Partner I may be deemed to beneficially own the shares of Common Stock directly held by Fund I and SPV. As the sole general partner of General Partner I, GP Ltd. I may also be deemed to beneficially own the shares of Common Stock directly held by Fund I and SPV. Fund II directly holds 8,453,038 shares of Common Stock. As the sole general partner of Fund II, General Partner II may be deemed to beneficially own the shares of Common Stock directly held by Fund II. As the sole general partner of General Partner II, GP Ltd. II may also be deemed to beneficially own the shares of Common Stock directly held by Fund II. As the sole director of GP Ltd. I and GP Ltd. II, Mr. Goodman may be deemed to beneficially own the shares of Common Stock directly held by Fund I, SPV and Fund II. In addition, Mr. Goodman may be deemed to beneficially own (i) 113,287 shares of Common Stock held of record by the Goodman Barinaga Trust, for which Mr. Goodman serves as trustee, and (ii) 54,083 shares of Common Stock held of record by Emaldi Corporation, for which Mr. Goodman serves as a director.

The response to Item 3 of this Amendment No. 2 is incorporated by reference herein. Except for the exchange described therein, none of the Reporting Persons has effected any transactions in securities of the Issuer during the past 60 days.

Item 6 of the Schedule 13D is hereby amended and supplemented as follows: The response to Item 3 of this Amendment No. 2 is incorporated by reference herein. On October 16, 2026, the Reporting Persons entered into a Joint Filing Agreement (the "Joint Filing Agreement"), pursuant to which they agreed to the joint filing on behalf of each of them of statements on Schedule 13D with respect to securities of the Issuer to the extent required by applicable law. A copy of the Joint Filing Agreement is filed as Exhibit 99.5 hereto and is incorporated by reference herein.

Item 7 of the Schedule 13D is hereby amended and supplemented to add the following exhibits: Exhibit 99.3 - Form of Exchange Agreement (incorporated by reference to Exhibit 10.1 to the Issuers current report on Form 8-K filed with the SEC on October 15, 2026). Exhibit 99.4 - Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.1 to the Issuer's current report on Form 8-K filed with the SEC on October 15, 2026). Exhibit 99.5 - Joint Filing Agreement, dated October 16, 2026.