Who's buying X4 Pharmaceuticals, Inc?

XFOR insider buying, 13F and 13D filings

• Oct 19, 2026Insider buy
  Adam R Craig (Executive Chairman): Bought $12K on the open market
  4.6K shares at ~$2.58, traded 2026-10-16. Now holds 333.3K shares (stake up 1%).
  View the filing on SEC EDGAR ↗

Signals come from SEC filings: Form 4 (insiders, filed within 2 business days), 13F (fund holdings, up to 45 days after quarter end) and Schedule 13D (5%+ activist stakes). This page reports what the filings show; it is not investment advice.