XFOR Form 3 Filed: New CFO Declares No Beneficial Ownership

Rhea-AI Filing Summary

X4 Pharmaceuticals, Inc. (XFOR) filed an initial Form 3 reporting that David Kirske holds the role of Chief Financial Officer and is a reporting person as of the 08/12/2025 event date. The filing states no securities are beneficially owned by the reporting person and lists an Exhibit 24 Power of Attorney. The submission is signed by an attorney-in-fact on 08/14/2025.

Positive

• Form 3 filed promptly documenting officer status on 08/12/2025
• No beneficial ownership disclosed, reducing immediate insider-sale/transaction disclosure complexity

Negative

• None.

Insights

Corporate Governance Analyst

New CFO filed a Form 3 and currently reports no beneficial ownership.

The Form 3 documents that David Kirske is a reporting officer of X4 Pharmaceuticals (XFOR) and that, as of the reporting date, he does not beneficially own any company securities. This is routine when a newly appointed officer has not yet received or acquired equity awards.

The filing includes an Exhibit 24 Power of Attorney, indicating the form was executed by an authorized representative. There are no disclosed derivative or non-derivative holdings to assess.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

KIRSKE DAVID

(Last) (First) (Middle)

C/O X4 PHARMACEUTICALS INC.

61 N BEACON STREET, 4TH FLOOR

(Street)

BOSTON MA 02134

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
08/12/2025

3. Issuer Name and Ticker or Trading Symbol
X4 Pharmaceuticals, Inc [ XFOR ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit List: Exhibit 24 Power of Attorney

No securities are beneficially owned.

	/s/ Brian Bowersox, Attorney-In-Fact	08/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What does XFOR's Form 3 filed on 08/12/2025 disclose about David Kirske?

The form discloses that David Kirske is the Chief Financial Officer and that he does not beneficially own any XFOR securities as of the report date.

Does the Form 3 show any stock options or derivative holdings for XFOR CFO?

No. The filing lists no derivative or non-derivative securities beneficially owned by the reporting person.

Was the Form 3 signed and who signed it for XFOR?

Yes. The filing was executed under power of attorney and signed by Brian Bowersox, Attorney-In-Fact on 08/14/2025.

What exhibits are included with the XFOR Form 3?

The filing includes Exhibit 24, a Power of Attorney.

Does this Form 3 indicate a change in control or major transaction for XFOR?

No. The document is an initial ownership disclosure and does not report any transactions or change in control.