X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share (XFOR)

Q: What does CUSIP 98420X103 represent in this 13F holders report?

CUSIP 98420X103 is the security identifier for XFOR - X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

Q: How many institutions held XFOR - X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share in Q4 2021?

49 institutional investors reported XFOR - X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share for Q4 2021. Use the holders table for investor-level position and value details.

CUSIP: 98420X103

Q4 2021 13F Holders as of 31 Dec 2021

Type / Class: Equity / Common Stock, par value $0.001 per share
Shares outstanding: 7,938,059
Total 13F shares: 17,568,471
Share change: +1,696,834
Total reported value: $40,229,950
Put/Call ratio: 215%
Price per share: $2.29
Number of holders: 49
Value change: -$2,286,455
Number of buys: 21
Number of sells: 23

Quarterly Holders Quick Answers

What is CUSIP 98420X103?
CUSIP 98420X103 identifies XFOR - X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share in SEC institutional holdings data.

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Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2022
Previous quarter: Q3 2021

Recent filing periods for CUSIP 98420X103:

Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024

Top shareholders of XFOR - X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Ikarian Capital, LLC	13F	Company	32%	2,539,917	$13,437,000	—	30 Sep 2021	13F
Bain Capital Life Sciences Investors, LLC	13F	Company	27%	2,119,540	$11,212,000	—	30 Sep 2021	13F
AIGH Capital Management LLC	13F	Company	21%	1,664,540	$8,805,000	—	30 Sep 2021	13F
ORBIMED ADVISORS LLC	13F	Company	17%	1,373,849	$7,268,000	—	30 Sep 2021	13F
VANGUARD GROUP INC	13F	Company	12%	934,352	$4,942,000	—	30 Sep 2021	13F
BVF INC/IL	13F	Company	11%	847,879	$4,485,000	—	30 Sep 2021	13F
Altium Capital Management LLC	13F	Company	10%	804,598	$4,256,000	—	30 Sep 2021	13F
Sio Capital Management, LLC	13F	Company	10%	804,597	$4,256,000	—	30 Sep 2021	13F
AXA S.A.	13F	Company	7.4%	590,269	$3,123,000	—	30 Sep 2021	13F
Monashee Investment Management LLC	13F	Company	7.1%	561,421	$2,970,000	—	30 Sep 2021	13F
DRIEHAUS CAPITAL MANAGEMENT LLC	13F	Company	6.4%	505,752	$2,675,000	—	30 Sep 2021	13F
Worth Venture Partners, LLC	13F	Company	4.9%	386,475	$2,044,000	—	30 Sep 2021	13F
New Leaf Venture Partners, L.L.C.	13F	Company	4.2%	335,000	$1,772,000	—	30 Sep 2021	13F
Polaris Venture Management Co. V, L.L.C.	13F	Company	3.9%	311,492	$1,648,000	—	30 Sep 2021	13F
SV Health Investors, LLC	13F	Company	3.9%	311,490	$1,648,000	—	30 Sep 2021	13F
BlackRock Finance, Inc.	13F	Company	3.4%	268,450	$1,419,000	—	30 Sep 2021	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	3.4%	267,582	$1,416,000	—	30 Sep 2021	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	3.4%	267,368	$1,414,000	—	30 Sep 2021	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2.2%	178,060	$941,000	—	30 Sep 2021	13F
FMR LLC	13F	Company	1.9%	152,831	$808,000	—	30 Sep 2021	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	1.7%	138,031	$730,000	—	30 Sep 2021	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	1.5%	120,394	$637,000	—	30 Sep 2021	13F
Cormorant Asset Management, LP	13F	Company	1.3%	103,980	$550,000	—	30 Sep 2021	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.93%	73,495	$389,000	—	30 Sep 2021	13F
Ergoteles LLC	13F	Company	0.87%	68,938	$365,000	—	30 Sep 2021	13F
NORTHERN TRUST CORP	13F	Company	0.85%	67,859	$359,000	—	30 Sep 2021	13F
STATE STREET CORP	13F	Company	0.61%	48,480	$256,000	—	30 Sep 2021	13F
Hudson Bay Capital Management LP	13F	Company	0.58%	45,893	$243,000	—	30 Sep 2021	13F
Bleichroeder LP	13F	Company	0.45%	35,730	$189,000	—	30 Sep 2021	13F
HRT FINANCIAL LP	13F	Company	0.44%	34,719	$183,000	—	30 Sep 2021	13F
CITADEL ADVISORS LLC	13F	Company	0.43%	33,932	$180,000	—	30 Sep 2021	13F
Ensign Peak Advisors, Inc	13F	Company	0.36%	28,593	$151,000	—	30 Sep 2021	13F
NORGES BANK	13F	Company	0.35%	27,700	$147,000	—	30 Sep 2021	13F
Marshall Wace North America L.P.	13F	Company	0.33%	26,252	$139,000	—	30 Sep 2021	13F
MARSHALL WACE, LLP	13F	Company	0.32%	25,223	$133,000	—	30 Sep 2021	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.22%	17,182	$91,000	—	30 Sep 2021	13F
Minot Wealth Management LLC	13F	Company	0.21%	17,000	$90,000	—	30 Sep 2021	13F
Trexquant Investment LP	13F	Company	0.21%	16,625	$88,000	—	30 Sep 2021	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.13%	10,475	$55,000	—	30 Sep 2021	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.13%	10,350	$55,000	—	30 Sep 2021	13F
BARCLAYS PLC	13F	Company	0.12%	9,899	$52,000	—	30 Sep 2021	13F
MORGAN STANLEY	13F	Company	0.11%	8,708	$46,000	—	30 Sep 2021	13F
American Portfolios Advisors	13F	Company	0.08%	6,250	$33,063	—	30 Sep 2021	13F
GROUP ONE TRADING LLC	13F	Company	0.03%	2,083	$11,000	—	30 Sep 2021	13F
Tower Research Capital LLC (TRC)	13F	Company	0.02%	1,250	$7,000	—	30 Sep 2021	13F
IFP Advisors, Inc	13F	Company	0.01%	1,000	$5,000	—	30 Sep 2021	13F
OSAIC HOLDINGS, INC.	13F	Company	0.01%	400	$2,000	—	30 Sep 2021	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0%	295	$1,561	—	30 Sep 2021	13F
WELLS FARGO & COMPANY/MN	13F	Company	0%	125	$1,000	—	30 Sep 2021	13F
Clearstead Advisors, LLC	13F	Company	0%	100	$1,000	—	30 Sep 2021	13F

Institutional Holders of X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share (XFOR) as of Q4 2021

As of 31 Dec 2021, X4 Pharmaceuticals, Inc - Common Stock, par value $0.001 per share (XFOR) was held by 49 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 17,568,471 shares. The largest 10 holders included Bain Capital Life Sciences Investors, LLC, Ikarian Capital, LLC, Point72 Asset Management, L.P., Tri Locum Partners LP, AIGH Capital Management LLC, ORBIMED ADVISORS LLC, AXA S.A., VANGUARD GROUP INC, BVF INC/IL, and Worth Venture Partners, LLC. This page lists 49 institutional shareholders reporting positions in this security for the Q4 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2021 vs Q3 2021 Across Filers

Q3 2021 holders

Q4 2021 holders

Holder diff

Investor	Q3 2021 Shares	Q4 2021 Shares	Share Diff	Share Chg %	Q3 2021 Value $	Q4 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.