ArriVent BioPharma, Inc. Investigation - AVBP

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ArriVent BioPharma, Inc. (NASDAQ: AVBP)

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Certification of Plaintiff Pursuant to Federal Securities Laws

I, duly certify and say, as to the claims asserted under the federal securities laws, that:

1.I have reviewed a complaint filed in the action.

2.I did not purchase the security that is the subject of this action at the direction of plaintiff's counsel or in order to participate in this action.

3.I am willing to serve as a representative party on behalf of the class, including providing testimony at deposition and trial, if necessary.

4.My transaction(s) in which are the subject of this litigation during the class period set forth in the complaint are set forth in the chart attached hereto.

5.Within the last 3 years,

6.I will not accept any payment for serving as a representative party on behalf of the class beyond the Plaintiff's pro rata share of any recovery, except as ordered or approved by the court, including any award for reasonable costs and expenses (including lost wages) directly relating to the representation of the class.

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Signed pursuant to California Civil Code Section 1633.1, et seq. - and the Uniform Electronic Transactions Act as adopted by the various states and territories of the United States.

By your signature above, you confirm that have retained Levi & Korsinsky, LLP to represent you and the shareholder class as a lead plaintiff in the pending class action against ArriVent BioPharma, Inc. This representation will be on a contingency basis, meaning that Levi & Korsinsky will advance all expenses in the litigation and will only seek compensation and/or reimbursement of expenses if the firm obtains a recovery. Regardless of the result, we will never ask you to directly pay for any attorneys’ fees, expenses, or costs. Should we obtain a favorable result, we may ask the court to award us compensation and reimbursement of expenses to be paid by the defendants or as a portion of any class recovery. In exchange for our representation, you agree to cooperate as our client by providing, for example, relevant documents and deposition testimony, if necessary. During the course of this litigation, we may employ and/or work with other law firms, experts, and third-parties to successfully prosecute this action. If you are not appointed as the lead plaintiff or Levi & Korsinsky is not appointed as lead counsel, we will notify you of such decision at which time this representation will end unless otherwise extended by you and the firm. We look forward to working with you towards a successful resolution of this action.

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ArriVent BioPharma, Inc Investigation Details

ArriVent BioPharma, Inc. shareholders lost money on October 6, 2026, when the stock fell sharply after the Company announced that its global Phase 3 FURVENT trial of firmonertinib failed to meet its primary endpoint of progression-free survival by blinded independent central review in previously untreated patients with EGFR exon 20 insertion--mutated non-small-cell lung cancer. On this news, the Company's shares collapsed roughly 50%--63% during the session, reaching a 52-week low near $12.09. Previously, on November 10, 2025, the Company filed an exhibit to Form 8-K representing that "An interim analysis for this study has not been performed and there is no plan to perform such analysis given the expected timing of top-line data." Later, on May 11, 2026, the Company filed a Form 424B5 prospectus supporting an at-the-market offering of up to $250,000,000, which described the Company as actively conducting the pivotal Phase 3 trial and seeking to support firmonertinib. The investigation concerns whether ArriVent BioPharma, Inc. adequately disclosed the clinical trial's progress and the timing of any negative efficacy data ahead of the October 6, 2026 announcement.

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