Skip to content
Disclosery

XFOR X4 PHARMACEUTICALS INC

Follow

COMMON STOCK (common), issuer CIK 1501697

40 managers (40 13F filers) reported a position in XFOR shares at 2025-09-30, 13,652,279 shares in all. 11 filers opened a position and 21 filers sold out during the quarter.

Managers
40
13F filers
40
New
11
Added
9
Reduced
10
Sold out
21
Shares held by filers
13,652,279

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

Each filer's latest stake. The shares are the aggregate the reporting persons state, which can include entities that file no 13F.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Bain Capital Life Sciences Investors, L…in group Bain Capital Life Sciences In…2,436,588$8.33M0.55%+1,872,72913F-HRTimelineGroup
BVF INC/ILin group BVF INC/IL2,233,742$7.64M0.31%new13F-HRTimelineGroup
Nantahala Capital Management, LLCin group Nantahala Capital Management,…2,228,350$7.62M0.47%new13F-HRTimelineGroup
Rosalind Advisors, Inc.1,544,607$5.28M1.87%new13F-HRTimeline
Deep Track Capital, LP1,122,484$3.84M0.11%new13F-HRTimeline
Stonepine Capital Management, LLC1,056,338$3.61M2.94%new13F-HRTimeline
KINGDON CAPITAL MANAGEMENT, L.L.C.933,332$3.19M0.5%+700,00013F-HRTimeline
STEMPOINT CAPITAL LP555,411$1.9M0.38%new13F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC410,485$1.4M<0.01%+178,59313F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC343,963$1.18M0.03%new13F-HRTimeline
Pale Fire Capital SEin group Pale Fire Capital180,851$619K0.07%+120,80013F-HRTimelineGroup
UBS Group AGin group UBS Group AG159,835$547K<0.01%+49,87613F-HRTimelineGroup
Palumbo Wealth Management LLC95,327$326K0.1%new13F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC79,658$272K<0.01%+30,51213F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC64,795$222K<0.01%-13,26613F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.61,934$212K<0.01%-117,29413F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP38,734$132K<0.01%+23,20013F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.21,666$74.1K<0.01%-113F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/19,304$66K<0.01%-61,01213F-HR/ATimelineGroup
RENAISSANCE TECHNOLOGIES LLC19,177$65.6K<0.01%+1,81113F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP13,868$47.4K<0.01%new13F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…10,679$36.5K<0.01%+5,47613F-HRTimelineGroup
GROUP ONE TRADING LLC3,998$13.7K<0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY3,728$12.8K<0.01%-7,19613F-HR/ATimelineGroup
Point72 Asia (Singapore) Pte. Ltd.2,914$9.97K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA2,533$9K<0.01%-55213F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.2,166$7.41K<0.01%013F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,759$6.02K<0.01%-3413F-HRTimelineGroup
TD Waterhouse Canada Inc.1,500$5.37K<0.01%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…729$2.49K<0.01%-8,99813F-HRTimelineGroup
Bleichroeder LP595$2.04K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS554$1.9K<0.01%-8213F-HRTimelineGroup
Blue Trust, Inc.284$971<0.01%013F-HRTimeline
SBI Securities Co., Ltd.216$739<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP38$131<0.01%013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO33$113<0.01%013F-HR/ATimelineGroup
NewEdge Advisors, LLC33$113<0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…33$113<0.01%new13F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC32$109<0.01%-73013F-HRTimelineGroup
HighMark Wealth Management LLC6$21<0.01%013F-HRTimeline

Events

  • FMR LLC and 1 other reporting person reported 4,558,616 XFOR shares, 4.6% of the class, as of 2026-09-30, in a 13G/A filed 2026-10-07. 0000315066-26-002326

    Accepted , ingested