X4 Pharmaceuticals, Inc.

X4 Pharmaceuticals, Inc.

XFOR·NASDAQ

$4.08

+0.99%
HealthcareBiotechnology

X4 Pharmaceuticals, Inc., a late-stage clinical biopharmaceutical company, focuses on the research, development, and commercialization of novel therapeutics for the treatment of rare diseases. Its lead product candidate is mavorixafor, a small molecule inhibitor of the chemokine receptor C-X-C chemokine receptor type 4 (CXCR4), which is in Phase III clinical trial for the treatment of patients with warts, hypogammaglobulinemia, infections, and myelokathexis syndrome; and Phase Ib clinical trial to treat chronic neutropenia and Waldenström macroglobulinemia. The company is also developing X4P-002, a CXCR4 antagonist for the treatment of brain cancers; and X4P-003, a CXCR4 antagonist for the treatment of CXCR4 disorders and primary immunodeficiencies. It has a license agreement with Abbisko Therapeutics Co., Ltd. to develop, manufacture, and commercialize mavorixafor in combination with checkpoint inhibitors or other agents in oncology indications. The company was founded in 2010 and is headquartered in Boston, Massachusetts.

At a Glance

Live Snapshot
Market Cap$384.82M
EPS-1.8700
P/E Ratio-2.18
Earnings Date08/06/2026
-32.70%
Return on Invested Capital
3%
3Y-49.0%
5Y-39.0%
10Y-101.0%
-42.51%
Return on Equity
-75%
3Y-66.0%
5Y-50.0%
10Y-205.0%
-27.27%
Return on Assets
7%
3Y-55.0%
5Y-46.0%
10Y-91.0%
X4 Pharmaceuticals, Inc.

X4 Pharmaceuticals, Inc. Management Team

XFOR · NASDAQ
DH

David H. Kirske

Chief Financial Officer

Born 1954(Age 72)
male
AR

Adam R. Craig

Executive Chair

Born 1966(Age 60)
RT

Renato T. Skerlj

Founder

RP

Richard Peters

Founder

Born 1962(Age 64)
KT

Keith T. Flaherty

Founder & Member of Corporate Advisory Board

Born 1971(Age 55)
JV

John Volpone

President & Chief Operating Officer

male
BB

Brian Bowersox

VP of Finance & Corporate Controller

male
xfor

X4 Pharmaceuticals, Inc. Insider Positioning

XFOR · NASDAQ

During the last 12 months, insiders have purchased $250K and sold $73K worth of XFOR shares, resulting in $177K of net buying activity.

3 Months

Bought

0

0.00

Sold

17.0K

72.82K

Net Activity

-73K

-$73K

3-6 Months

Bought

0

0.00

Sold

0

0.00

Net Activity

+0

+$0

6-9 Months

Bought

86.2K

250.00K

Sold

0

0.00

Net Activity

+250K

+$250K

9-12 Months

Bought

0

0.00

Sold

0

0.00

Net Activity

+0

+$0

Top Buyers

1
CAR

Craig Adam R

Director, Officer: Executive Chairman

86.2K shares1 transactions

$250K

Top Sellers

1
KD

Kirske David

Officer: Chief Financial Officer

17.0K shares1 transactions

$73K

Insider Activity Analysis

Net Insider Sentiment

Bullish

Strong bullish signal with $177K net buying. Insiders are aggressively accumulating shares, suggesting significant confidence in future prospects.

Buy/Sell Ratio

3.43:1

Exceptional buy/sell ratio. Buying dramatically outweighs selling—one of the strongest possible insider signals.

Recent Trend (3 Months)

$73K

Heavy recent selling activity. Recent insider sales notably exceed purchases—may warrant investigation into company developments.

Insider Participation

Balanced

1 insider buyers and 1 sellers. Equal participation suggests mixed or neutral insider views.

SEC Filings

XFOR - Filing history and reports

Filing TypeFiling DatePeriod EndingFiscal YearActions
DEF 14A

DEF 14A 2026

N/A

March 20, 2026
March 20, 2026
2026
DEF 14A

DEF 14A 2025

N/A

April 25, 2025
April 25, 2025
2025
DEF 14A

DEF 14A 2025

N/A

March 24, 2025
March 24, 2025
2025
DEF 14A

DEF 14A 2024

N/A

April 29, 2024
April 29, 2024
2024
DEF 14A

DEF 14A 2023

N/A

April 25, 2023
April 25, 2023
2023
DEF 14A

DEF 14A 2022

N/A

August 11, 2022
September 01, 2022
2022
DEF 14A

DEF 14A 2022

N/A

April 25, 2022
June 06, 2022
2022
DEF 14A

DEF 14A 2020

N/A

April 20, 2021
December 31, 2020
2020
DEF 14A

DEF 14A 2020

N/A

April 28, 2020
June 10, 2020
2020
DEF 14A

DEF 14A 2019

N/A

May 22, 2019
June 17, 2019
2019
Showing 1 to 10 of 11 filings