LYTIR

Company · XFOR

X4 Pharmaceuticals, Inc.

Name as listed on its exchange; filed with the SEC as X4 Pharmaceuticals, Inc.

Nasdaq's symbol directory lists XFOR on Nasdaq as “X4 Pharmaceuticals, Inc. - Common Stock”.

In the 12 months to Nov 8, 2026: insiders bought on 1 occasion ($12K); insiders sold on 4 occasions ($390K); 1 planned-sale notice; 4 filings by holders of 5% or more; 3 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $12K in total; Insider sales: $390K in total.Jun: Insider sales $36KAug: Insider sales $320KOct: Insider purchases $12KOct: Insider sales $34KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $12KInsider sales below: $390K
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Craig Adam R, Executive Chairman sold on 1 day bought on 1 day latest Oct 16, 2026 sold $211K · bought $12K
  2. Volpone John, President sold on 1 day latest Aug 12, 2026 sold $109K
  3. KIRSKE DAVID, Chief Financial Officer sold on 2 days latest Oct 1, 2026 sold $70K
Every trade (5)
  1. BUYCraig Adam R, Executive Chairman bought Oct 16, 2026 4,600 shares filing $12K
  2. SELLKIRSKE DAVID, Chief Financial Officer sold Oct 1, 2026 11,767 shares filing $34K
  3. SELLCraig Adam R, Executive Chairman sold Aug 12, 2026 47,436 shares filing $211K
  4. SELLVolpone John, President sold Aug 12, 2026 24,576 shares filing $109K
  5. SELLKIRSKE DAVID, Chief Financial Officer sold Jun 30, 2026 8,543 shares filing $36K

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. David Kirske filed Oct 1, 2026 Officer 11,767 shares planned sale date 10/01/2026 filing $34K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. FMR LLC filed Oct 7, 2026 Schedule 13G/A passive 4,558,616 shares filing 4.6%
  2. Venrock Healthcare Capital Partners III, L.P. filed Sep 21, 2026 Schedule 13G passive filing 5.6%
  3. Deep Track Capital, LP filed Aug 14, 2026 Schedule 13G/A passive 8,040,894 shares filing 8.33%
  4. Perceptive Advisors LLC filed Aug 14, 2026 Schedule 13G/A passive filing 8.1%

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Other events filing Oct 29, 2026
  2. Entry into a material definitive agreement; Termination of a material definitive agreement; Creation of a direct financial obligation; Unregistered sales of equity securities; Regulation FD disclosure filing Oct 8, 2026
  3. Other events filing Sep 9, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.