Institutional Ownership
Xenon Pharmaceuticals Inc
CUSIP 98420N105COMXENEQ1 2026
13D / 13G Filings
34
Schedule 13D/13G on record
Beneficial Filers
12
Distinct reporting persons
Largest Stake
11.5%
Max % of class reported
Institutional Holders
282
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
34 filings · latest Feb 10, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 10, 2026 | Wellington Management Group LLP | 13G | 6.2% | 4.76M | SEC |
| 2 | Nov 14, 2025 | Janus Henderson Group PLC | 13G | 5.1% | 3.94M | SEC |
| 3 | Aug 12, 2025 | Wellington Management Group LLP | 13G/A | 2.8% | 2.17M | SEC |
| 4 | Aug 6, 2025 | Fmr LLC | 13G/A | 11.5% | 8.82M | SEC |
| 5 | Jul 17, 2025 | Blackrock, Inc. | 13G | 6.2% | 4.76M | SEC |
| 6 | Mar 7, 2025 | Fmr LLC | 13G/A | 10.3% | 7.85M | SEC |
| 7 | Nov 12, 2024 | Fmr LLC | 13G/A | 9.1% | — | SEC |
| 8 | Feb 14, 2024 | Driehaus Capital Management LLC | 13G/A | 5.9% | 4.35M | SEC |
| 9 | Feb 14, 2024 | Avoro Capital Advisors LLC | 13G/A | 7.7% | 5.67M | SEC |
| 10 | Feb 9, 2024 | Fmr LLC | 13G/A | 7.6% | — | SEC |
24 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Xenon Pharmaceuticals Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Fmr LLC | 10.82M | $629.10M |
| 2 | Avoro Capital Advisors LLC | 5.78M | $335.98M |
| 3 | Blackrock, Inc. | 5.64M | $327.97M |
| 4 | Wellington Management Group LLP | 4.83M | $280.84M |
| 5 | Driehaus Capital Management LLC | 4.49M | $261.19M |
| 6 | Polar Capital Holdings PLC | 4.41M | $256.17M |
| 7 | Janus Henderson Group PLC | 4.18M | $242.86M |
| 8 | Capital International Investors | 2.67M | $155.54M |
| 9 | Citadel Advisors LLC | 2.65M | $154.27M |
| 10 | Jpmorgan Chase & Co | 1.92M | $106.86M |