0001501697 FALSE 0001501697 2025-05-01 2025-05-01

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM | 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): May 1, 2025

X4 PHARMACEUTICALS, INC.
(Exact name of registrant as specified in its charter)

Delaware |  | 001-38295 |  | 27-3181608
(State or other jurisdiction of incorporation) |  | (Commission File Number) |  | (IRS Employer Identification No.)

61 North Beacon Street, | 4th Floor |  |
Boston, | Massachusetts |  | 02134
(Address of principal executive offices) |  | (Zip Code)

(857) 529-8300
(Registrant’s telephone number, including area code)
Not applicable
(Former name or former address, if changed since last report)
_______________________________________________________________________________________________________
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common Stock, par value $0.001 per share |  | XFOR |  | The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 | Results of Operations and Financial Condition.

On May 1, 2025, X4 Pharmaceuticals, Inc. (the “Company”) issued a press release announcing its financial results and other business highlights for the first quarter ended March 31, 2025. A copy of the press release is being furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.
The information furnished under this Item 2.02 in this Current Report on Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 7.01 | Regulation FD Disclosure

On May 1, 2025, the Company posted an updated corporate presentation on the Company’s website, attached as Exhibit 99.2 hereto. To access the presentation, investors should visit the “Investors” section of the Company’s website at www.x4pharma.com.
The information furnished under this Item 7.01 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 9.01 |  | Financial Statements and Exhibits.
Exhibit No. |  | Description
99.1 |  | Press Release of X4 Pharmaceuticals, Inc. dated Ma y 1, 2025.
99.2 |  | Corporate Presentation, dated May 1, 2025.
104 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934 the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

|  | X4 PHARMACEUTICALS, INC.
Date: May 1, 2025 |  | By: | /s/ Adam S. Mostafa
|  |  | Name: Adam S. Mostafa
|  |  | Title: Chief Financial Officer