X4 Pharmaceuticals, Inc. filed a Form 8-K with the SEC on October 29, 2026, reporting that the company posted an investor presentation to its website in connection with its Investor Day event held the same date.

Key Highlights

  • Filing date: October 29, 2026, reported under Item 8.01 (Other Events).
  • Event: X4 Pharmaceuticals hosted an Investor Day on October 29, 2026, according to the filing.
  • Exhibit filed: An investor presentation dated October 29, 2026, was filed as Exhibit 99.1 and incorporated by reference.
  • Signed by: David Kirske, Chief Financial Officer and Treasurer, on behalf of the registrant.
  • Exchange listing: Common stock, par value $0.001 per share, trades on NASDAQ:XFOR.

X4 Pharmaceuticals Files 8-K for October 29 Investor Day Presentation

X4 Pharmaceuticals, Inc., a Delaware-incorporated biopharmaceutical company headquartered at 61 North Beacon Street, 4th Floor, Boston, Massachusetts, filed a current report disclosing that it posted an investor presentation to its website on October 29, 2026, in connection with an Investor Day event held that same day. The company disclosed this action under Item 8.01 (Other Events) of Form 8-K.

According to the filing, the investor presentation is attached as Exhibit 99.1, dated October 29, 2026, and is incorporated by reference into the current report. The filing also includes Exhibit 104, described as a Cover Page Interactive Data File embedded within the Inline XBRL document. The report was signed by David Kirske in his capacity as Chief Financial Officer and Treasurer of X4 Pharmaceuticals, Inc.

The registrant's common stock carries a par value of $0.001 per share and is listed on The Nasdaq Stock Market LLC under the trading symbol XFOR, as stated on the filing's cover page. The company holds Commission File Number 001-38295 and IRS Employer Identification Number 27-3181608. The filing indicates the company is not classified as an emerging growth company.

What Was Disclosed

X4 Pharmaceuticals filed a Form 8-K dated October 29, 2026, to report that an investor presentation prepared for its Investor Day event was posted to its website and filed with the SEC as Exhibit 99.1, with David Kirske signing as CFO and Treasurer.