UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 001-36687 XENON PHARMACEUTICALS INC. (Exact name of Registrant as Specified in its Charter) FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 Canada 98-0661854 ...

Exhibit 99.1 NEWS RELEASE Xenon Pharmaceuticals Reports First Quarter 2024 Financial Results and Provides Corporate Update Phase 3 epilepsy program continues to progress with anticipated completion of patient enrollment in X-TOLE2 in late 2024 to early 2025 Successful "end-of-Phase 2" interactions with FDA in MDD; Phase 3 program on track to initiate in the second half of the year Azetukalner now the international nonproprietary name (INN) and United States adopted name (USAN) for XEN1101 Conference call at ...

Xenon Pharmaceuticals Inc. (NASDAQ:XENE) Q4 2023 Earnings Call Transcript February 29, 2024 4:30 PM ET Company Participants Sherry Aulin - CFO Ian Mortimer - President and CEO Chris Kenney - CMO Chris Von Seggern - CCO Conference Call Participants Paul Matteis - Stifel Leonid Timashev - RBC Capital Markets Tess Romero - JPMorgan Andrew Tsai - Jefferies Danielle Brill - Raymond James Joseph Thome - TD Cowen Brian Skorney - Baird Marc Goodman - Leerink Partners Laura Chico - Wedbush Security Operator Good aft ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-36687 XENON PHARMACEUTICALS INC. (Exact Name of Registrant as Specified in its Charter) Canada 98-0661854 (State or other jurisdictio ...

Exhibit 99.1 NEWS RELEASE Xenon Pharmaceuticals Reports Fourth Quarter and Full Year 2023 Financial Results and Provides Corporate Update XEN1101 Phase 3 epilepsy program continues to progress with X-TOLE2 and X-TOLE3 in focal onset seizures and X-ACKT in primary generalized tonic-clonic seizures; completion of patient enrollment in X-TOLE2 expected in late 2024 to early 2025 Planned "end-of-Phase 2" meeting with the FDA in April to support the initiation of XEN1101 Phase 3 program in major depressive disor ...

Xenon Pharmaceuticals Inc. (NASDAQ:XENE) Q3 2023 Results Conference Call November 8, 2023 4:30 PM ET Company Participants Sherry Aulin - Chief Financial Officer Ian Mortimer - President and Chief Executive Officer Chris Kenney - Chief Medical Officer Chris Von Seggern - Chief Commercial Officer Conference Call Participants Paul Matteis - Stifel Brian Abrahams - RBC Capital Markets Tessa Romero - JPMorgan Andrew Tsai - Jefferies Paul Choi - Goldman Sachs Joseph Thome - TD Cowen Danielle Brill - Raymond James ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 001-36687 XENON PHARMACEUTICALS INC. (Exact name of Registrant as Specified in its Charter) Canada 98-066 ...

Xenon Pharmaceuticals Inc. (NASDAQ:XENE) Q2 2023 Earnings Conference Call August 9, 2023 4:30 PM ET Company Participants Sherry Aulin - CFO Ian Mortimer - President and CEO Dr. Chris Kenney - CMO Dr. Chris Von Seggern - Chief Commercial Officer Conference Call Participants Tessa Romero - J.P. Morgan Paul Matteis - Stifel Brian Abrahams - RBC Capital Markets Andrew Tsai - Jefferies Paul Choi - Goldman Sachs Joseph Thome - TD Cowen Danielle Brill - Raymond James Laura Chico - Wedbush Securities Mohit Bansal - ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 001-36687 XENON PHARMACEUTICALS INC. (Exact name of Registrant as Specified in its Charter) (State or other ju ...

Xenon Pharmaceuticals Inc. (NASDAQ:XENE) Q1 2023 Results Conference Call May 9, 2023 4:30 PM ET Company Participants Sherry Aulin - CFO Ian Mortimer - President and CEO Dr. Chris Kenney - CMO Dr. Chris Von Seggern - Chief Commercial Officer Conference Call Participants Paul Matteis - Stifel Brian Abrahams - RBC Capital Markets Tessa Romero - J.P. Morgan Andrew Tsai - Jefferies Joseph Thome - TD Cowen Rudy Li - SVB Danielle Brill - Raymond James Laura Chico - Wedbush Securities Elaine Kim - Cantor Fitzgerald ...