InsiderFlow

XFOR

X4 Pharmaceuticals, Inc.$4.01+0.13 (+3.35%)
Prev Close$3.88·MCap$48.0M·P/E·Vol440.8K·Yield

Buys (12M)

1

$250.0K

Sells (12M)

1

$72.8K

Net Activity

Net Buyer

$177.2K

Active Insiders

2

last 12 mo

Over the past 12 months, insider activity at X4 Pharmaceuticals, Inc. (XFOR) has been dominated by buying, with 1 insider purchase totaling $250.0K and 1 insider sale totaling $72.8K. The most recent insider transaction was by KIRSKE DAVID (officer: Chief Financial Officer), who sold $72.8K worth of shares on May 13, 2026. X4 Pharmaceuticals, Inc. operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $48.0M.

XFOR Insider Trading Activity

DateInsiderTypeValue
May 13, 2026 KIRSKE DAVIDSell$72.8K
Oct 23, 2025 Craig Adam RBuy$250.0K0.8% OS
May 16, 2025 Baldry MarkBuy$2.6K
Feb 14, 2025 Baldry MarkBuy$19.3K
Jan 27, 2025 Arbet-Engels ChristopheSell$5.3K
Jan 27, 2025 Baldry MarkSell$13.2K
Jan 27, 2025 DiBiase MarySell$10.1K
Jan 27, 2025 Mostafa Adam S.Sell$33.9K0.7% OS
Jan 27, 2025 Ragan PaulaSell$34.7K0.7% OS
Nov 19, 2024 Ragan PaulaSell$12.6K
Oct 16, 2024 Ragan PaulaSell$17.9K
Oct 8, 2024 Baldry MarkSell$6.5K
Oct 8, 2024 DiBiase MarySell$38.3K0.6% OS
Oct 8, 2024 Mostafa Adam S.Sell$126.9K2.0% OS
Oct 8, 2024 Ragan PaulaSell$131.5K2.1% OS
Oct 8, 2024 Taveras ArthurSell$43.3K0.7% OS
Sep 11, 2024 DiBiase MarySell$1.7K
Mar 11, 2024 DiBiase MarySell$13.6K
Mar 11, 2024 Mostafa Adam S.Sell$46.3K
Mar 11, 2024 Ragan PaulaSell$43.9K
Mar 11, 2024 Taveras ArthurSell$12.6K
Feb 12, 2024 DiBiase MarySell$3.7K
Feb 12, 2024 Mostafa Adam S.Sell$28.0K
Feb 12, 2024 Ragan PaulaSell$21.9K
Feb 12, 2024 Taveras ArthurSell$792.67
Nov 3, 2023 Baldry MarkSell$7.5K
Nov 3, 2023 DiBiase MarySell$49.4K0.6% OS
Nov 3, 2023 Mostafa Adam S.Sell$168.4K2.0% OS
Nov 3, 2023 Ragan PaulaSell$181.6K2.1% OS
Nov 3, 2023 Taveras ArthurSell$49.4K0.6% OS
Sep 12, 2023 DiBiase MarySell$3.3K
Aug 22, 2023 WYZGA MICHAEL SBuy$29.9K
Aug 11, 2023 Stewart MurraySell$137.9K1.1% OS
Jul 5, 2023 DiBiase MarySell$876.96
Jul 5, 2023 Mostafa Adam S.Sell$5.0K
Jun 26, 2023 DiBiase MarySell$1.7K
Jun 26, 2023 Mostafa Adam S.Sell$10.5K
Jun 26, 2023 Ragan PaulaSell$12.9K
Jun 16, 2023 DiBiase MarySell$1.9K
Jun 16, 2023 Mostafa Adam S.Sell$12.0K
Jun 16, 2023 Ragan PaulaSell$15.0K
May 31, 2023 Ragan PaulaSell$12.3K
Mar 13, 2023 DiBiase MarySell$15.3K
Mar 13, 2023 Mostafa Adam S.Sell$44.1K
Mar 13, 2023 Ragan PaulaSell$41.7K
Mar 13, 2023 Taveras ArthurSell$14.1K
Feb 15, 2023 DiBiase MarySell$4.0K
Feb 15, 2023 Mostafa Adam S.Sell$25.8K
Feb 15, 2023 Ragan PaulaSell$20.2K
Feb 15, 2023 Taveras ArthurSell$863.04
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XFOR Insider Buying Activity

The following table shows recent insider purchases of X4 Pharmaceuticals, Inc. (XFOR) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
Oct 23, 2025 Craig Adam RBuy$250.0K0.8% OS
May 16, 2025 Baldry MarkBuy$2.6K
Feb 14, 2025 Baldry MarkBuy$19.3K
Aug 22, 2023 WYZGA MICHAEL SBuy$29.9K

XFOR Insider Selling Activity

The following table shows recent insider sales of X4 Pharmaceuticals, Inc. (XFOR) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
May 13, 2026 KIRSKE DAVIDSell$72.8K
Jan 27, 2025 Arbet-Engels ChristopheSell$5.3K
Jan 27, 2025 Baldry MarkSell$13.2K
Jan 27, 2025 DiBiase MarySell$10.1K
Jan 27, 2025 Mostafa Adam S.Sell$33.9K0.7% OS
Jan 27, 2025 Ragan PaulaSell$34.7K0.7% OS
Nov 19, 2024 Ragan PaulaSell$12.6K
Oct 16, 2024 Ragan PaulaSell$17.9K
Oct 8, 2024 Baldry MarkSell$6.5K
Oct 8, 2024 DiBiase MarySell$38.3K0.6% OS
Oct 8, 2024 Mostafa Adam S.Sell$126.9K2.0% OS
Oct 8, 2024 Ragan PaulaSell$131.5K2.1% OS
Oct 8, 2024 Taveras ArthurSell$43.3K0.7% OS
Sep 11, 2024 DiBiase MarySell$1.7K
Mar 11, 2024 DiBiase MarySell$13.6K
Mar 11, 2024 Mostafa Adam S.Sell$46.3K
Mar 11, 2024 Ragan PaulaSell$43.9K
Mar 11, 2024 Taveras ArthurSell$12.6K
Feb 12, 2024 DiBiase MarySell$3.7K
Feb 12, 2024 Mostafa Adam S.Sell$28.0K
Feb 12, 2024 Ragan PaulaSell$21.9K
Feb 12, 2024 Taveras ArthurSell$792.67
Nov 3, 2023 Baldry MarkSell$7.5K
Nov 3, 2023 DiBiase MarySell$49.4K0.6% OS
Nov 3, 2023 Mostafa Adam S.Sell$168.4K2.0% OS
Nov 3, 2023 Ragan PaulaSell$181.6K2.1% OS
Nov 3, 2023 Taveras ArthurSell$49.4K0.6% OS
Sep 12, 2023 DiBiase MarySell$3.3K
Aug 11, 2023 Stewart MurraySell$137.9K1.1% OS
Jul 5, 2023 DiBiase MarySell$876.96
Jul 5, 2023 Mostafa Adam S.Sell$5.0K
Jun 26, 2023 DiBiase MarySell$1.7K
Jun 26, 2023 Mostafa Adam S.Sell$10.5K
Jun 26, 2023 Ragan PaulaSell$12.9K
Jun 16, 2023 DiBiase MarySell$1.9K
Jun 16, 2023 Mostafa Adam S.Sell$12.0K
Jun 16, 2023 Ragan PaulaSell$15.0K
May 31, 2023 Ragan PaulaSell$12.3K
Mar 13, 2023 DiBiase MarySell$15.3K
Mar 13, 2023 Mostafa Adam S.Sell$44.1K
Mar 13, 2023 Ragan PaulaSell$41.7K
Mar 13, 2023 Taveras ArthurSell$14.1K
Feb 15, 2023 DiBiase MarySell$4.0K
Feb 15, 2023 Mostafa Adam S.Sell$25.8K
Feb 15, 2023 Ragan PaulaSell$20.2K
Feb 15, 2023 Taveras ArthurSell$863.04

XFOR Insiders

KIRSKE DAVID

officer: Chief Financial Officer

Sold $72.8K
1 tradesLast: May 13, 2026
Craig Adam R

Executive Chairman

Bought $250.0K
1 tradesLast: Oct 23, 2025
Baldry Mark

Chief Commercial Officer

Bought $21.8KSold $27.2K
5 tradesLast: May 16, 2025
DiBiase Mary

Chief Operating Officer

Sold $143.9K
12 tradesLast: Jan 27, 2025
Mostafa Adam S.

Chief Financial Officer

Sold $654.1K
14 tradesLast: Jan 27, 2025
Arbet-Engels Christophe

Chief Medical Officer

Sold $5.3K
1 tradesLast: Jan 27, 2025
Ragan Paula

President and CEO

Sold $826.9K
19 tradesLast: Jan 27, 2025
Taveras Arthur

Chief Scientific Officer

Sold $121.0K
6 tradesLast: Oct 8, 2024
WYZGA MICHAEL S

Director

Bought $29.9K
1 tradesLast: Aug 22, 2023
Stewart Murray

Interim Chief Medical Officer

Sold $137.9K
1 tradesLast: Aug 11, 2023
Meisner Derek M

General Counsel

Sold $104.3K
3 tradesLast: Aug 19, 2021