XFOR X4 PHARMACEUTICALS INC
FollowCOMMON STOCK (common), issuer CIK 1501697
75 managers (76 13F filers) reported a position in XFOR shares at 2025-12-31, 85,919,950 shares in all. 37 filers opened a position and 4 filers sold out during the quarter.
- Managers
- 75
- 13F filers
- 76
- New
- 37
- Added
- 16
- Reduced
- 8
- Sold out
- 4
- Shares held by filers
- 85,919,950
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.
- FMR LLC(group FMR LLC)
4,558,616 shares, 4.6% in a 13G/A as of 2026-09-30,0000315066-26-002326
Accepted , ingested
Insider trades
No Form 4 transaction on this security in the data.
13F holders, Q4 2025
Filers in the available 13F reports with a share position at 2025-12-31, 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.
| Holder | Shares | Value | % of portfolio | Change | Source |
|---|---|---|---|---|---|
| Empery Asset Management, LP | 8,951,105 | $35.8M | 31.57% | 13F-HRTimeline | |
| FMR LLCin group FMR LLC | 8,499,100 | $34M | <0.01% | new | 13F-HRTimelineGroup |
| MORGAN STANLEYin group MORGAN STANLEY | 8,208,015 | $32.8M | <0.01% | +8,204,287 | 13F-HR/ATimelineGroup |
| Bain Capital Life Sciences Investors, L…in group Bain Capital Life Sciences In… | 7,967,454 | $31.9M | 2.44% | +5,530,866 | 13F-HRTimelineGroup |
| PERCEPTIVE ADVISORS LLCin group PERCEPTIVE ADVISORS LLC | 6,314,452 | $25.3M | 0.46% | new | 13F-HRTimelineGroup |
| Saturn V Capital Management LP | 5,800,530 | $23.2M | 4.26% | new | 13F-HRTimeline |
| Deep Track Capital, LP | 5,013,661 | $20.1M | 0.46% | +3,891,177 | 13F-HRTimeline |
| Kalehua Capital Management LLC | 3,722,840 | $14.9M | 14.73% | 13F-HRTimeline | |
| VANGUARD GROUP INCin group VANGUARD GROUP INC | 3,423,662 | $13.7M | <0.01% | +3,013,177 | 13F-HRTimelineGroup |
| BRAIDWELL LP | 3,368,904 | $13.5M | 0.43% | new | 13F-HRTimeline |
| Blackstone Inc.in group Blackstone Inc. | 2,681,922 | $10.7M | 0.04% | new | 13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them. |
| Rosalind Advisors, Inc. | 2,605,920 | $10.4M | 3.8% | +1,061,313 | 13F-HRTimeline |
| Trails Edge Capital Partners, LP | 2,571,478 | $10.3M | 2.54% | 13F-HRTimeline | |
| Nantahala Capital Management, LLCin group Nantahala Capital Management,… | 2,449,468 | $9.8M | 0.58% | +221,118 | 13F-HRTimelineGroup |
| BVF INC/ILin group BVF INC/IL | 2,233,742 | $8.93M | 0.3% | 0 | 13F-HRTimelineGroup |
| SAMSARA BIOCAPITAL, LLC | 1,960,000 | $7.84M | 0.81% | new | 13F-HRTimeline |
| Siren, L.L.C.in group Siren, L.L.C. | 1,500,000 | $6M | 0.18% | new | 13F-HRTimelineGroup |
| BlackRock, Inc.in group BlackRock, Inc. | 1,226,808 | $4.91M | <0.01% | +1,164,874 | 13F-HRTimelineGroup |
| Woodline Partners LP | 1,000,855 | $4M | 0.02% | new | 13F-HRTimeline |
| GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC | 940,447 | $3.76M | <0.01% | +860,789 | 13F-HRTimelineGroup |
| STEMPOINT CAPITAL LP | 898,465 | $3.59M | 0.62% | +343,054 | 13F-HRTimeline |
| GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC | 831,890 | $3.33M | <0.01% | new | 13F-HR/ATimelineGroup |
| Point72 Asset Management, L.P.in group Point72 Asset Management, L.P. | 808,154 | $3.23M | 0.01% | +786,488 | 13F-HRTimelineGroup |
| Stonepine Capital Management, LLC | 593,573 | $2.37M | 1.88% | -462,765 | 13F-HRTimeline |
| SILVERARC CAPITAL MANAGEMENT, LLCin group SILVERARC CAPITAL MANAGEMENT,… | 357,387 | $1.43M | 0.21% | new | 13F-HRTimelineGroup |
| STATE STREET CORPin group STATE STREET CORP | 198,234 | $793K | <0.01% | +159,500 | 13F-HRTimelineGroup |
| NORTHERN TRUST CORPin group NORTHERN TRUST CORP | 178,235 | $713K | <0.01% | new | 13F-HRTimelineGroup |
| Pale Fire Capital SEin group Pale Fire Capital | 167,590 | $670K | 0.09% | -13,261 | 13F-HRTimelineGroup |
| Affinity Asset Advisors, LLC | 145,000 | $580K | 0.04% | new | 13F-HRTimeline |
| CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC | 128,675 | $515K | <0.01% | new | 13F-HRTimelineGroup |
| Palumbo Wealth Management LLC | 113,357 | $453K | 0.11% | +18,030 | 13F-HRTimeline |
| OMERS ADMINISTRATION Corp | 109,200 | $437K | <0.01% | new | 13F-HRTimeline |
| JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC | 91,413 | $366K | <0.01% | new | 13F-HRTimelineGroup |
| MARSHALL WACE, LLPin group MARSHALL WACE, LLP | 80,456 | $322K | <0.01% | new | 13F-HRTimelineGroup |
| ExodusPoint Capital Management, LP | 79,072 | $316K | <0.01% | new | 13F-HRTimeline |
| Qube Research & Technologies Ltd | 67,747 | $271K | <0.01% | new | 13F-HRTimeline |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co | 66,788 | $267K | <0.01% | new | 13F-HRTimelineGroup |
| SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding | 65,394 | $262K | new | Timeline
| |
| Balyasny Asset Management L.P.in group Balyasny Asset Management | 64,505 | $258K | <0.01% | new | 13F-HRTimelineGroup |
| BARCLAYS PLCin group BARCLAYS PLC | 57,500 | $230K | <0.01% | new | 13F-HRTimelineGroup |
| MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC | 55,978 | $224K | <0.01% | -8,817 | 13F-HRTimelineGroup |
| BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/ | 35,761 | $143K | <0.01% | +16,457 | 13F-HRTimelineGroup |
| CITIGROUP INCin group CITIGROUP INC | 32,332 | $129K | <0.01% | +32,300 | 13F-HRTimelineGroup |
| Hudson Bay Capital Management LPin group Hudson Bay Capital Management… | 32,239 | $129K | <0.01% | new | 13F-HRTimelineGroup |
| Jefferies Financial Group Inc.in group Jefferies Financial Group Inc. | 26,118 | $104K | <0.01% | new | 13F-HRTimelineGroup |
| Man Group plcin group Man Group plc | 24,187 | $96.7K | <0.01% | new | 13F-HRTimelineGroup |
| Virtu Financial LLCin group Virtu Financial LLC | 22,489 | $90K | <0.01% | new | 13F-HRTimelineGroup |
| Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner… | 22,200 | $88.8K | <0.01% | new | 13F-HRTimelineGroup |
| STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP | 20,496 | $82K | <0.01% | new | 13F-HRTimelineGroup |
| TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP | 17,246 | $69K | <0.01% | +3,378 | 13F-HRTimelineGroup |
| Creative Planningin group Creative Planning | 16,427 | $65.7K | <0.01% | new | 13F-HRTimelineGroup |
| CAXTON CORP | 15,557 | $62.2K | 1.45% | new | 13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them. |
| Squarepoint Ops LLCin group Squarepoint Ops LLC | 12,518 | $50.1K | <0.01% | new | 13F-HRTimelineGroup |
| Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T… | 10,446 | $41.8K | <0.01% | -233 | 13F-HRTimelineGroup |
| Indivisible Partners | 10,000 | $40K | <0.01% | 13F-HRTimeline | |
| JPMORGAN CHASE & COin group JPMORGAN CHASE & CO | 4,581 | $18.3K | <0.01% | +4,548 | 13F-HRTimelineGroup |
| UBS Group AGin group UBS Group AG | 4,129 | $16.5K | <0.01% | -155,706 | 13F-HRTimelineGroup |
| GROUP ONE TRADING LLC | 3,998 | $16K | <0.01% | 0 | 13F-HRTimeline |
| SIGNATUREFD, LLC | 2,754 | $11K | <0.01% | new | 13F-HRTimeline |
| CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc. | 2,166 | $8.66K | <0.01% | 0 | 13F-HRTimelineGroup |
| PNC Financial Services Group, Inc.in group PNC Financial Services Group,… | 1,759 | $7.04K | <0.01% | 0 | 13F-HRTimelineGroup |
| Russell Investments Group, Ltd.in group Russell Investments Group, Lt… | 729 | $2.92K | <0.01% | 0 | 13F-HRTimelineGroup |
| Allworth Financial LP | 715 | $2.86K | <0.01% | new | 13F-HRTimeline |
| Bleichroeder LP | 595 | $2.38K | <0.01% | 0 | 13F-HRTimeline |
| BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS | 511 | $2.04K | <0.01% | -43 | 13F-HRTimelineGroup |
| Farther Finance Advisors, LLC | 331 | $1.32K | <0.01% | new | 13F-HRTimeline |
| Blue Trust, Inc. | 284 | $1.14K | <0.01% | 0 | 13F-HRTimeline |
| Fortitude Family Office, LLC | 137 | $548 | <0.01% | new | 13F-HRTimeline |
| SBI Securities Co., Ltd. | 50 | $200 | <0.01% | -166 | 13F-HRTimeline |
| JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP | 38 | $152 | <0.01% | 0 | 13F-HRTimelineGroup |
| NewEdge Advisors, LLC | 33 | $132 | <0.01% | 0 | 13F-HRTimeline |
| Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen… | 33 | $132 | <0.01% | 0 | 13F-HR/ATimelineGroup |
| HighMark Wealth Management LLC | 6 | $24 | <0.01% | 0 | 13F-HRTimeline |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN… | 5 | $20 | <0.01% | new | 13F-HR/ATimelineGroup |
| ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA | 104 | $0 | 0% | -2,429 | 13F-HRTimelineGroupValue filed as zero, left out of ratios. |
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