Coastlands Capital LP and Affiliates Report 9.99% Ownership in X4 Pharmaceuticals, Inc.

Coastlands Capital LP, along with its affiliates Coastlands Capital Partners LP, Coastlands Capital GP LLC, Coastlands Capital LLC, and Matthew D. Perry, have reported a 9.99% ownership in X4 Pharmaceuticals, Inc. The ownership is based on 2,491,638 shares of Common Stock issuable upon the exercise of pre-funded warrants. The reporting entities disclaim beneficial ownership of the shares except to the extent of their pecuniary interest. The filing is made jointly but not as members of a group, and each entity disclaims membership in a group. The Partnership holds the shares for the benefit of its investors and has the right to receive or direct the receipt of dividends or proceeds from the sale of the shares. The filing is made under Rule 13d-1(b) and Rule 13d-1(c).