XbiotechXBIT
13F holders, Q4 2025 (December 31)41holders −7
3new positions
8sold out
1famous investor
$2.39avg. 13F price*
At the end of Q4 2025, 41 institutions reported holding Xbiotech Inc. (XBIT) in their 13F filings, down 7 from Q3 2025. 3 opened new positions and 8 sold out. The largest holders were Vanguard Group Inc. ($716K), BlackRock, Inc. ($690K) and Geode Capital Management, LLC ($529K). One famous investor held it Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Xbiotech Inc.
- CUSIP
- 98400H102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $504K |
| Exits | 8 | $183K |
All 13F filers, Q3 2025 → Q4 2025: 317,262 shares bought and 945,415 shares sold, net −628,153 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 41 holders
| Vanguard Group Inc. | 0.00% | Reduce -63.4% | 299,556 | $716K |
| BlackRock, Inc. | 0.00% | Reduce -4.5% | 288,632 | $690K |
| Geode Capital Management, LLC | 0.00% | Reduce -0.3% | 221,121 | $529K |
| RBF Capital, LLC | 0.02% | Reduce -0.8% | 198,501 | $474K |
| Ameriprise Financial Inc. | 0.00% | New | 186,796 | $446K |
| Morgan Stanley | 0.00% | Add +34.5% | 163,419 | $391K |
| Millennium Management | 0.00% | Reduce -67.5% | 135,438 | $324K |
| Bridgeway Capital Management, LLC | 0.00% | Add +50.4% | 89,547 | $214K |
| Northern Trust Corp. | 0.00% | Reduce -6.3% | 76,439 | $183K |
| State Street Corp. | 0.00% | Add +8.5% | 73,006 | $174K |
| Jane Street Group, LLC | 0.00% | Add +25.1% | 69,738 | $167K |
| Squarepoint Ops LLC | 0.00% | Add +3.0% | 64,004 | $153K |
| Empowered Funds, LLC | 0.00% | No change | 59,547 | $142K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -21.2% | 50,695 | $121K |
| Bank of New York Mellon Corp | 0.00% | No change | 48,451 | $116K |
| Bank of America Corp. | 0.00% | Reduce -24.3% | 35,895 | $86K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -16.1% | 30,229 | $72K |
| BNP Paribas Financial Markets | 0.00% | Add +30.3% | 26,864 | $64K |
| National Bank of Canada | 0.00% | No change | 25,000 | $59K |
| XTX Topco Ltd | 0.00% | Add +44.1% | 21,703 | $52K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -32.0% | 20,611 | $49K |
| American Century Companies Inc. | 0.00% | No change | 18,881 | $45K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -32.7% | 16,831 | $40K |
| Two Sigma Advisers, LP | 0.00% | No change | 16,300 | $39K |
| Persistent Asset Partners Ltd | 0.02% | New | 13,565 | $32K |
| Thomasville National Bank | 0.00% | No change | 13,350 | $32K |
| Pinnacle Financial Partners, Inc. | 0.00% | — | 11,796 | $28K |
| Two Sigma Securities, LLC | 0.00% | New | 10,378 | $25K |
| UBS Group AG | 0.00% | Reduce -21.9% | 5,061 | $12K |
| JPMorgan Chase & Co. | 0.00% | Reduce -52.6% | 1,128 | $3K |
| Rhumbline Advisers | 0.00% | No change | 928 | $2K |
| McIlrath & Eck, LLC | 0.00% | No change | 753 | $2K |
| FMR LLC | 0.00% | Add +45.2% | 450 | $1K |
| Jones Financial Companies LLLP | 0.00% | No change | 370 | $884 |
| Simplex Trading, LLC | 0.00% | Reduce -79.2% | 67 | $160 |
| Larson Financial Group LLC | 0.00% | No change | 21 | $50 |
| Optiver Holding B.V. | 0.00% | No change | 8 | $19 |
| Barclays PLC | 0.00% | Reduce -99.5% | 1 | $2 |
| SBI Securities Co., Ltd. | 0.00% | No change | 1 | $2 |
| Royal Bank of Canada | 0.00% | Reduce -93.3% | 186 | $0 |
| Cwm, LLC | 0.00% | Reduce -81.9% | 23 | $0 |
"% of holder's portfolio" is XBIT's weight in each manager's 13F, not the share of Xbiotech Inc. the manager owns.