X4 Pharmaceuticals Announces Inducement Grants Under Nasdaq Listing Rule 5635(C)(4)

The options have a ten-year term and an exercise price of $4.31 per share, which is equal to the closing price of X4's common stock on May 29, 2026. Each option will vest over a four-year period, with 25% of the shares vesting after 12 months and the remaining shares vesting monthly over the following 36 months, subject to the employee's continued employment with X4 on such vesting dates. The options are subject to the terms and conditions of the 2019 Inducement Plan and the terms and conditions of an award agreement covering the grant.

About X4 Pharmaceuticals

X4 Pharmaceuticals is a company focused on improving the lives of people with rare hematology diseases by developing and commercializing innovative therapies in areas with significant unmet needs. Leveraging expertise in diseases of the immune system and CXCR4 biology, X4 has successfully developed mavorixafor, an orally available CXCR4 antagonist that is approved in the U.S. and EU as XOLREMDI® for patients with WHIM syndrome. The Company is currently conducting a global, pivotal Phase 3 clinical trial (4WARD) evaluating mavorixafor in chronic neutropenic disorders. The U.S. FDA has granted Fast Track designation to mavorixafor for the treatment of chronic neutropenia. X4 is headquartered in Boston, Massachusetts. For more information, please visit .

X4 Investor Contact:
Remy Bernarda
Jenny Kobin
IR Advisory Solutions
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Source: X4 Pharmaceuticals, Inc.

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