XFOR: KIRSKE DAVID discloses a sale

By AlphaYouPublished Oct 5, 2026Form 4

Stocks in this disclosure

Reported activity

KIRSKE DAVID

Reporting filer

KIRSKE DAVID reported Sale in X4 Pharmaceuticals, Inc: 11767 units of Common Stock, dated 2026-10-01. The full Form 4 contains 1 transaction entry.

Disclosed: Oct 5, 2026

Reported details

1 entry

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	KIRSKE DAVID	2026-10-01	S	Sale	11767	2.8604	155,983	4 days	Filed terms security Title: Common Stock transaction Date: 2026-10-01 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 11767 transaction Price Per Share: 2.8604 id: F2 transaction Acquired Disposed Code: D shares Owned Following Transaction: 155983 id: F3 direct Or Indirect Ownership: D

Common Stock

Owner: KIRSKE DAVID
Date: 2026-10-01
Code: S
Action: Sale
Quantity: 11767
Price: 2.8604
Following holdings: 155,983
Reporting delay: 4 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-01
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 11767
transaction Price Per Share: 2.8604
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 155983
id: F3
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
KIRSKE DAVID: Chief Financial Officer.
F1: Sale of shares to cover personal income tax obligation upon settlement of restricted stock unit award.
F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $2.82 to $2.92, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3: Of the shares of common stock reported, 64,418 shares represent restricted stock units.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

KIRSKE DAVID

2026-10-01

Sale

11767

2.8604

155,983

4 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-01
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 11767
transaction Price Per Share: 2.8604
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 155983
id: F3
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

KIRSKE DAVID: Chief Financial Officer.

F1: Sale of shares to cover personal income tax obligation upon settlement of restricted stock unit award.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $2.82 to $2.92, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3: Of the shares of common stock reported, 64,418 shares represent restricted stock units.