Institutional Ownership
Xbiotech Inc
CUSIP 98400H102COMXBITQ1 2026
13D / 13G Filings
22
Schedule 13D/13G on record
Beneficial Filers
8
Distinct reporting persons
Largest Stake
19.9%
Max % of class reported
Institutional Holders
34
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
22 filings · latest Jan 23, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Jan 23, 2026 | W. Thorpe Mckenzie | 13G/A | 9.8% | 3.01M | SEC |
| 2 | Jan 23, 2026 | John Simard | 13G/A | 17.7% | 5.72M | SEC |
| 3 | Jan 27, 2025 | W. Thorpe Mckenzie | 13G/A | 9.7% | 2.99M | SEC |
| 4 | Jan 27, 2025 | John Simard | 13G/A | 19.9% | 6.62M | SEC |
| 5 | Feb 7, 2024 | Simard John | 13G/A | 19.9% | 6.61M | SEC |
| 6 | Feb 7, 2024 | Gut Thomas | 13G/A | 12.9% | 3.91M | SEC |
| 7 | Feb 7, 2024 | Mckenzie W Thorpe | 13G/A | 9.7% | 2.97M | SEC |
| 8 | Feb 10, 2023 | Mckenzie W Thorpe | 13G | 9.9% | 3.04M | SEC |
| 9 | Feb 10, 2023 | Simard John | 13G | 16.3% | 5.19M | SEC |
| 10 | Feb 10, 2023 | Gut Thomas | 13G | 12.9% | 3.91M | SEC |
12 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Xbiotech Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 293.1K | $688.8K |
| 2 | Geode Capital Management, LLC | 231.0K | $543.2K |
| 3 | Rbf Capital, LLC | 198.5K | $466.5K |
| 4 | Morgan Stanley | 165.6K | $389.1K |
| 5 | Millennium Management LLC | 105.5K | $248.0K |
| 6 | Bridgeway Capital Management, LLC | 98.4K | $231.3K |
| 7 | Northern Trust Corp | 76.1K | $178.8K |
| 8 | State Street Corp | 73.0K | $171.6K |
| 9 | Jane Street Group, LLC | 60.1K | $141.2K |
| 10 | Empowered Funds, LLC | 59.5K | $139.9K |