X4 Pharmaceuticals, Inc (XFOR) Insider Ownership

Historic Insider Ownership Trends

Through the 90-day period concluding February 19, 2026, X4 Pharmaceuticals's top three insider stakeholders include Executive Chairman Adam R Craig (376.09K shares), President John Volpone (289.88K shares), Chief Financial Officer David Kirske (193.25K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Paula Ragan President And Ceo 111,235 14 Feb, 2025
Mary Dibiase Chief Operating Officer 38,029 14 Feb, 2025
Christophe Arbet-Engels Chief Medical Officer 28,804 14 Feb, 2025
Adam S. Mostafa Chief Financial Officer 28,331 14 Feb, 2025
Arthur Taveras Chief Scientific Officer 12,933 08 Oct, 2024
Adam R Craig Executive Chairman 376,087 27 Oct, 2025
John Volpone President 289,881 14 Aug, 2025
David Kirske Chief Financial Officer 193,254 14 Aug, 2025
Derek M Meisner Chief Legal Officer 4,838 19 Aug, 2022
Diego Cadavid Chief Medical Officer 3,470 01 Mar, 2022
William Aliski 3,222 11 Jun, 2024
Alison Frances Lawton 3,222 11 Jun, 2024
Mark Baldry Chief Commercial Officer 25,337 03 Jun, 2025
Natasha Fay Thoren Chief Legal Officer 9,462 03 Jul, 2025
Murray Stewart 7,883 10 Jun, 2025
Keith Woods 6,000 10 Jun, 2025
Michael S Wyzga 5,555 10 Jun, 2025
Gary Bridger 4,722 10 Jun, 2025
Craecker Francoise De 4,722 10 Jun, 2025
David W J Mcgirr 4,722 10 Jun, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
23 Oct, 2025 Adam R Craig Common Stock A 86,206 $2.90 376,087 D P
14 Aug, 2025 David Kirske Common Stock A 193,254 $0.00 193,254 D A
14 Aug, 2025 Adam R Craig Common Stock A 289,881 $0.00 289,881 D A
14 Aug, 2025 John Volpone - - 289,881 D
14 Aug, 2025 John Volpone Common Stock A 289,881 $0.00 289,881 D A
09 Jun, 2025 Michael S Wyzga Common Stock A 1,500 $0.00 5,555 D A
09 Jun, 2025 David W J Mcgirr Common Stock A 1,500 $0.00 4,722 D A
09 Jun, 2025 Gary Bridger Common Stock A 1,500 $0.00 4,722 D A
09 Jun, 2025 Murray Stewart - - 7,883 D
09 Jun, 2025 Murray Stewart Common Stock A 1,500 $0.00 7,883 D A
09 Jun, 2025 Craecker Francoise De Common Stock A 1,500 $0.00 4,722 D A
09 Jun, 2025 Keith Woods Common Stock A 1,500 $0.00 6,000 D A
20 May, 2025 Natasha Fay Thoren Common Stock A 3,333 $0.00 9,462 D A
20 May, 2025 Natasha Fay Thoren - - 9,462 D
16 May, 2025 Mark Baldry Common Stock A 1,032 $2.48 25,337 D P
16 May, 2025 Mark Baldry Common Stock A 1,032 $2.48 25,337 D A
16 May, 2025 Mark Baldry - - 25,337 D
12 Feb, 2025 Adam S. Mostafa Common Stock A 850,000 $0.00 28,331 D A
12 Feb, 2025 Paula Ragan Common Stock A 2,250,000 $0.00 111,235 D A
12 Feb, 2025 Christophe Arbet-Engels Common Stock A 850,000 $0.00 28,804 D A