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CIK 0001501697 · Non-accelerated filer<br>Smaller reporting company

X4 Pharmaceuticals, Inc

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Ticker
XFOR
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
273181608
Phone
857-529-8300
Business address
61 NORTH BEACON STREET, 4TH FLOOR, BOSTON, MA, 02134
Former names
Arsanis, Inc.
Open-market buys, last 90 days
$11,884
in 1 filing
Open-market sales, last 90 days
$33,658
in 1 filing

Net −$21,775. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. KIRSKE DAVID −$34K Chief Financial Officer sold 7% of stake
  2. Craig Adam R +$12K Executive Chairman 1 filing

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2025-08-14 KIRSKE DAVID Chief Financial Officer Grant or award · Stock Option (right to buy) +352,800 352,800
2025-08-12 Volpone John President Grant or award · Stock Option (right to buy) +1,609,873 1,609,873
2025-08-12 Craig Adam R Executive Chairman Grant or award · Stock Option (right to buy) +1,609,873 1,609,873
2025-08-12 KIRSKE DAVID Chief Financial Officer Grant or award · Stock Option (right to buy) +1,073,249 1,073,249
2025-06-09 Stewart Murray Director Grant or award +1,500 7,883
2025-06-09 de Craecker Francoise Director Grant or award +1,500 4,722
2025-06-09 Bridger Gary Director Grant or award +1,500 4,722
2025-06-09 Woods Keith Director Grant or award +1,500 6,000
2025-06-09 MCGIRR DAVID W J Director Grant or award +1,500 4,722
2025-06-09 WYZGA MICHAEL S Director Grant or award +1,500 5,555
2025-05-20 Thoren Natasha Fay Chief Legal Officer Grant or award +3,333 9,462
2025-05-16 Baldry Mark Chief Commercial Officer Grant or award +1,032 $2.48 $3K 25,337
2025-05-16 Baldry Mark Chief Commercial Officer Purchase +1,032 $2.48 $3K 25,337
2025-02-12 Arbet-Engels Christophe Chief Medical Officer Grant or award +850,000 864,207
2025-02-12 Mostafa Adam S. Chief Financial Officer Grant or award +850,000 850,000
2025-02-12 Ragan Paula President and CEO Grant or award +2,250,000 3,337,386
2025-02-12 Baldry Mark Chief Commercial Officer Grant or award +600,000 729,173
2025-02-12 DiBiase Mary Chief Operating Officer Grant or award +650,000 1,140,980
2025-01-24 Ragan Paula President and CEO Sale −76,473 $0.45 $35K 1,087,386
2025-01-24 Mostafa Adam S. Chief Financial Officer Sale −74,773 $0.45 $34K 0

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