X4 Pharmaceuticals, Inc.

XFOR·NASDAQ·$4.00Share Price as of 11/2·$46MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/06/26 10-QQ1 ended 03/31/2605/06/26 10-KFY 202503/17/26 10-QQ3 ended 09/30/2511/05/25 10-QQ2 ended 06/30/2508/08/25

Disclosures

8-KCurrent report10/29/26 8-KCurrent report10/08/26 8-KCurrent report09/09/26 8-KCurrent report09/08/26 8-KCurrent report07/01/26

Prospectuses and Registrations

S-3Shelf registration05/06/26 S-8Registration of securities for employees03/18/26 424B5Prospectus supplement10/24/25 424B5Prospectus supplement10/23/25 424B3Prospectus09/18/25

Proxies

DEF 14ADefinitive proxy03/20/26 DEFA14AAdditional proxy materials03/20/26 DEF 14ADefinitive proxy04/25/25 DEFA14AAdditional proxy materials04/25/25 DEF 14ADefinitive proxy03/24/25

Ownership

Form 4Insider transaction10/19/26 SC 13G/ABeneficial ownership (amended)10/07/26 Form 4Insider transaction10/05/26 144Proposed sale of securities10/01/26 SC 13GBeneficial ownership09/21/26

Other

EFFECTRequest for effectiveness05/14/26 CORRESPCorrespondence with the SEC05/12/26 UPLOADLetter from the SEC05/11/26 ARSAnnual report to shareholders03/20/26 EFFECTRequest for effectiveness09/17/25