# EDGAR Filing Document

**Accession Number:** 0001582313
**File Stem:** 0001193125-26-076530
**Filing Date:** 2026-2
**Character Count:** 22352
**Document Hash:** fdd0c75549007945464a969150f551fa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-076530.hdr.sgml**: 20260226

**ACCESSION NUMBER**: 0001193125-26-076530

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260226

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260226

**DATE AS OF CHANGE**: 20260226

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Xenon Pharmaceuticals Inc.
- **CENTRAL INDEX KEY:** 0001582313
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 980661854
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36687
- **FILM NUMBER:** 26687682

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 200 - 3650 GILMORE WAY
- **CITY:** BURNABY
- **PROVINCE COUNTRY:** A1
- **BUSINESS PHONE:** (604) 484-3300

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 200 - 3650 GILMORE WAY
- **CITY:** BURNABY
- **PROVINCE COUNTRY:** A1

?xml version='1.0' encoding='ASCII'? 8-K

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549** 

------

**FORM** 8-K

------

**CURRENT REPORT** 

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934** 

**Date of Report (Date of earliest event reported):** February 26, 2026

------

XENON PHARMACEUTICALS INC.

(Exact name of Registrant as Specified in Its Charter)

------

---

| | | |
|:---|:---|:---|
| Canada | 001-36687 | 98-0661854 |
| **(State or Other Jurisdiction**<br>**of Incorporation)** | **(Commission File Number)** | **(IRS Employer**<br>**Identification No.)** |
| 200-3650 Gilmore Way<br>Burnaby**,** British Columbia**,** Canada |  | V5G 4W8 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

---

**Registrant's Telephone Number, Including Area Code: (**604**)** 484-3300

**Not Applicable** 

**(Former name or former address, if changed since last report)** 

------

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) 

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) 

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) 

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading <br>Symbol(s)** | **Name of each exchange on which registered** |
| Common Shares, without par value | XENE | The Nasdaq Stock Market LLC<br>(The Nasdaq Global Market) |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 2.02** | &nbsp;&nbsp;&nbsp;&nbsp;**Results of Operations and Financial Condition** |

---

On February 26, 2026, Xenon Pharmaceuticals Inc. (the "Company") announced via press release the Company's financial results for the year ended December 31, 2025. A copy of the Company's press release is attached hereto as Exhibit 99.1. The information in Item 2.02 of this Form 8-K and the attached exhibit are furnished to, but not filed with, the Securities and Exchange Commission.

---

| | |
|:---|:---|
| **Item 7.01** | &nbsp;&nbsp;&nbsp;&nbsp;**Regulation FD Disclosure** |

---

The Company announces material information to the public through a variety of means, including filings with the Securities and Exchange Commission, press releases, public conference calls, the Company's website (https://www.xenon-pharma.com), its investor relations website (https://investor.xenon-pharma.com), and its news site (https://investor.xenon-pharma.com/news-releases). The Company uses these channels, as well as social media, including its X (formerly known as Twitter) account (@XenonPharma), LinkedIn account (https://www.linkedin.com/company/xenonpharma/), and Facebook page (https://www.facebook.com/xenonpharma), to communicate with investors and the public about the Company, its product candidates, and other matters. Therefore, the Company encourages investors, the media, and others interested in the Company to review the information it makes public in these locations, as such information could be deemed to be material information.

---

| | |
|:---|:---|
| **Item 9.01** | &nbsp;&nbsp;&nbsp;&nbsp;**Financial Statements and Exhibits** |

---

(d) Exhibits.

Pursuant to the rules and regulations of the Securities and Exchange Commission, the attached exhibit is deemed to have been furnished to, but not filed with, the Securities and Exchange Commission:

---

| | |
|:---|:---|
| **<u>Exhibit Number</u>** | **<u>Description</u>** |
| 99.1 | [<u>Press Release issued by Xenon Pharmaceuticals Inc. dated February 26, 2026.</u>](xene-ex99_1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

------

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **XENON PHARMACEUTICALS INC.** | **XENON PHARMACEUTICALS INC.** |
| Date: February 26, 2026 | By: | /s/ Thomas P. Kelly |
|  |  | Thomas P. Kelly |
|  |  | Chief Financial Officer  |

---

------

## Exhibit 99.1

![img189401473_0.jpg](img189401473_0.jpg)

**Exhibit 99.1**

**Xenon Reports Q4 and Full Year 2025 Financial Results and Provides Business Update**

• *Phase 3 X-TOLE2 topline data for azetukalner in FOS expected first half of March 2026*

• *Five additional Phase 3 studies of azetukalner continue to enroll in epilepsy and neuropsychiatry indications with Phase 3 X-NOVA2 MDD topline data expected in H1 2027*

• *Data from two Phase 1 studies of novel NaV1.7 (XEN1701) and KV7 (XEN1120) candidates expected in 2026 to support Phase 2 proof-of-concept studies in pain*

• *Pro forma cash of $716 million including recent ATM sales extends cash runway into second half of 2027*

• *Xenon's next investor call to be held for X-TOLE2 topline data readout*

VANCOUVER, British Columbia and BOSTON, MA, Feb 26, 2026 – Xenon Pharmaceuticals Inc. (Nasdaq: XENE), a neuroscience-focused biopharmaceutical company dedicated to drug discovery, clinical development, and commercialization of life-changing therapeutics for patients in need, today reported financial results for the fourth quarter and full year ended December 31, 2025 and provided a business update.

"2025 marked a period of significant momentum and strong execution across multiple Phase 3 clinical trials of azetukalner in epilepsy and neuropsychiatry, as well as our early-stage pipeline that includes two novel ion channel modulators for pain," said Ian Mortimer, President and Chief Executive Officer of Xenon. "We're looking forward to several upcoming milestones, starting with reporting topline data for our Phase 3 X-TOLE2 study of azetukalner in focal onset seizures in the first half of March, followed by anticipated NDA submission in the second half of this year."

**<u>Business Highlights and Anticipated Milestones</u>**

**Azetukalner Clinical Development** 

Azetukalner, a novel, potent KV7 potassium channel opener, represents the most advanced, clinically validated potassium channel modulator in late-stage clinical development for the treatment of multiple indications, including two in epilepsy – focal onset seizures (FOS) and primary generalized tonic-clonic seizures (PGTCS) – as well as neuropsychiatric disorders, including major depressive disorder (MDD) and bipolar depression (BPD).

*Epilepsy Programs*

• Topline data from the Phase 3 X-TOLE2 study of azetukalner in FOS is on track for the first half of March 2026.

• Phase 3 X-TOLE3 study of azetukalner in FOS continues to enroll and is intended to support regulatory submissions outside the United States. Xenon has completed an ethnobridging study and shared results with Japan's Pharmaceutical and Medical Devices Agency (PMDA). The Company aligned with PMDA to enroll approximately 60 of the planned 360 X-TOLE3 participants in Japan to support a potential regulatory submission in Japan. X-TOLE3 enrollment outside of Japan is expected to complete in 2026.

• Phase 3 X-ACKT study of azetukalner in PGTCS continues to enroll and is intended to support regulatory submissions for an additional epilepsy indication.

------

• The Company presented 48-month data from the X-TOLE open label extension (OLE) study at the American Epilepsy Society (AES) annual meeting, reinforcing the long-term efficacy and safety of azetukalner with more than 775 patient-years of exposure data in the OLE. Among participants treated for ≥48 months, reductions in monthly FOS frequency were over 90% from double-blind period baseline, with over 38% achieving at least 12 months of seizure freedom.

*Depression Programs*

• Enrollment is ongoing for the Phase 3 X-NOVA2 and X-NOVA3 studies evaluating azetukalner in patients with MDD, with topline data from X-NOVA2 expected in H1 2027.

• Phase 3 X-CEED study evaluating azetukalner in patients with BPD I or II is underway.

**Early-Stage R&D**

Xenon continues to expand its portfolio of innovative potassium and sodium channel modulators. NaV1.7 and KV7 are important targets for pain and have been developed using the Company's strong heritage in human genetics, deep understanding of ion channel biology, and expertise in novel chemistries to design potent, selective ion channel modulators.

*Pain*

• Phase 1 Single Ascending Dose (SAD)/Multiple Ascending Dose (MAD) study in healthy adult participants is underway for XEN1701 targeting NaV1.7. Study completion is expected in 2026 to support initiating a Phase 2 proof-of-concept study in acute pain.

• Phase 1 SAD/MAD study in healthy adult participants is underway for XEN1120 targeting KV7. Study completion is expected in 2026 to support initiating a Phase 2 proof-of-concept study in acute pain.

*Epilepsy*

• IND-enabling studies are ongoing for the Company's NaV1.1 program. Pre-clinical data suggest that targeting NaV1.1 could potentially address the underlying cause and symptoms of Dravet Syndrome.

**Partnered Program**

• In collaboration with Neurocrine Biosciences, a Phase 1 study is ongoing for NBI-921355, an investigational, selective inhibitor of voltage-gated sodium channels NaV1.2 and NaV1.6 in development for the potential treatment of certain types of epilepsy.

**Corporate**

• The Company raised net proceeds of $242.2 million, including $112.2 million in the fourth quarter of 2025 and an additional $130.0 million in the first quarter of 2026, from sales of common stock through its at-the-market offering facility (ATM). Pro forma cash, cash equivalents and marketable securities of $716.0 million includes Q1 2026 ATM proceeds.

**<u>Fourth Quarter and Full Year 2025 Financial Results</u>** 

• Cash and cash equivalents and marketable securities were $586.0 million as of December 31, 2025, compared to $754.4 million as of December 31, 2024. Subsequent to December 31, 2025, $130.0 million of net proceeds was raised under the Company's ATM. Based on current operating plans, Xenon anticipates having sufficient cash to fund operations into second half of 2027. As of December 31, 2025, there were 80,010,790 common shares and 2,173,081 pre-funded warrants outstanding.

------

• Research and development expenses were $87.7 million for the fourth quarter of 2025, and $300.9 million for the year ended 2025, compared to $59.5 million and $210.4 million for the same periods in 2024, respectively. The increase in research and development expenses for the year was primarily attributable to the ongoing azetukalner Phase 3 clinical studies in epilepsy, MDD and BPD, increased personnel-related costs due to an increase in employee headcount and stock-based compensation expense, and costs associated with advancement of the pre-clinical, discovery and other programs.

• General and administrative expenses were $22.1 million for the fourth quarter of 2025, and $79.6 million for the year ended 2025, compared to $18.0 million and $68.9 million for the same periods in 2024, respectively. The increase in general and administrative expenses for the year was primarily attributable to personnel-related costs due to an increase in employee headcount and an increase in professional and consulting fees.

• Other income was $5.0 million for the fourth quarter of 2025, and $28.2 million for the year ended 2025, compared to $7.9 million and $40.9 million for the same periods in 2024. The decrease in other income for the year was primarily attributable to lower interest income.

• Net loss was $105.3 million for the fourth quarter of 2025, and $345.9 million for the year ended 2025, compared to $65.7 million and $234.3 million for the same periods in 2024, respectively. The increase in net loss for the year was primarily attributable to higher research and development expenses driven by the azetukalner program, personnel-related costs and pre-clinical, discovery and other programs, higher general and administrative expenses driven by higher personnel-related costs and professional and consulting fees, and lower interest income.

**<u>About Azetukalner</u>**

Azetukalner is a novel, potent KV7 potassium channel opener currently in Phase 3 clinical trials for the treatment of epilepsy, major depressive disorder (MDD) and bipolar depression (BPD). It represents the most advanced, clinically validated potassium channel modulator in late-stage clinical development. Azetukalner is designed to open potassium channels in the central nervous system, allowing potassium ions to flow and hyperpolarizing neurons. This process helps reduce excessive neuronal firing, which is a key contributor to several neurologic and psychiatric disorders. It is the only KV7 potassium channel opener in development for multiple indications that is backed by long-term efficacy and safety data in epilepsy patients and proof-of-concept data in MDD patients.

**<u>About Xenon Pharmaceuticals Inc.</u>**

Xenon Pharmaceuticals (Nasdaq: XENE) is a neuroscience-focused biopharmaceutical company dedicated to drug discovery, clinical development and commercialization of life-changing therapeutics for patients in need. Xenon's lead molecule, azetukalner, is a novel, potent KV7 potassium channel opener in Phase 3 clinical trials for the treatment of epilepsy, major depressive disorder (MDD) and bipolar depression (BPD). Xenon is also advancing an early-stage portfolio of multiple promising potassium and sodium channel modulators, including KV7 and NaV1.7 programs in Phase 1 development for the potential treatment of pain. Xenon has offices in Vancouver, British Columbia, and Boston, Massachusetts. For more information, visit www.xenon-pharma.com and follow us on LinkedIn and X.

Xenon and the Xenon logo are registered trademarks or trademarks of Xenon Pharmaceuticals Inc. in the US, Canada, and elsewhere. All other trademarks belong to their respective owner.

------

**<u>Safe Harbor Statement</u>**

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995 and Canadian securities laws. These forward-looking statements are not based on historical fact, and include statements regarding the timing of and potential results from clinical studies; the potential efficacy, safety profile, future development plans in current and anticipated indications, addressable market, regulatory success and commercial potential of our and our partners' product candidates; the efficacy of our clinical study designs; our ability to successfully develop and achieve milestones in our azetukalner and other pipeline and development programs, including the anticipated filing of INDs and NDAs; the timing and results of our interactions with regulators, including the timing of any NDA submission; our ability to successfully develop and obtain regulatory approval of azetukalner and our other product candidates; and anticipated timing of topline data readout from our clinical studies of azetukalner. These forward-looking statements are based on current assumptions that involve risks, uncertainties and other factors that may cause the actual results, events, or developments to be materially different from those expressed or implied by such forward-looking statements. These risks and uncertainties, many of which are beyond our control, include, but are not limited to: clinical studies may not demonstrate safety and efficacy of any of our or our collaborators' product candidates; promising results from pre-clinical development activities or early clinical study results may not be replicated in later clinical studies; our assumptions regarding our planned expenditures and sufficiency of our cash to fund operations may be incorrect; our ongoing discovery and pre-clinical efforts may not yield additional product candidates; any of our or our collaborators' product candidates, including azetukalner, may fail in development, may not receive required regulatory approvals, or may be delayed to a point where they are not commercially viable; we may not achieve additional milestones in our proprietary or partnered programs; regulatory agencies may impose additional requirements or delay the initiation or completion of clinical studies; the impact of market, industry, and regulatory conditions on clinical study enrollment; the impact of competition; the impact of expanded product development and clinical activities on operating expenses; the impact of new or changing laws and regulations; the impact of unstable economic conditions in the general domestic and global economic markets; adverse conditions from geopolitical events; as well as the other risks identified in our filings with the U.S. Securities and Exchange Commission and the securities commissions in British Columbia, Alberta, and Ontario. These forward-looking statements speak only as of the date hereof and we assume no obligation to update these forward-looking statements, and readers are cautioned not to place undue reliance on such forward-looking statements.

**<u>Contacts</u>**

*For Investors:*

Tucker Kelly

Chief Financial Officer

<u>investors@xenon-pharma.com</u>

*For Media:*

Colleen Alabiso

Senior Vice President, Corporate Affairs

<u>media@xenon-pharma.com</u>

------

XENON PHARMACEUTICALS INC.

Condensed Consolidated Balance Sheets

(Expressed in thousands of U.S. dollars)

---

| | | |
|:---|:---|:---|
|  | **December 31,** | **December 31,** |
|  | **2025** | **2024** |
| **Assets** |  |  |
| Current assets: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cash, cash equivalents and marketable securities | $548886 | $626905 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other current assets | 11763 | 8359 |
| Marketable securities, long-term | 37152 | 127496 |
| Other long-term assets | 35362 | 35379 |
| **Total assets** | $633163 | $798139 |
| **Liabilities** |  |  |
| Current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts payable and accrued liabilities | $40260 | $34221 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other current liabilities | 1532 | 1369 |
| Other long-term liabilities | 9611 | 7646 |
| **Total liabilities** | $51403 | $43236 |
| **Shareholders' equity** | $581760 | $754903 |
| **Total liabilities and shareholders' equity** | $633163 | $798139 |

---

XENON PHARMACEUTICALS INC.

Condensed Consolidated Statements of Operations and Comprehensive Loss

(Expressed in thousands of U.S. dollars except share and per share amounts)

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended <br>December 31,** | **Three Months Ended <br>December 31,** | **Year Ended <br>December 31,** | **Year Ended <br>December 31,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Revenue | $— | $— | $7500 | $— |
| Operating expenses: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Research and development | 87699 | 59472 | 300938 | 210394 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 22068 | 18005 | 79632 | 68904 |
| Total operating expenses | 109767 | 77477 | 380570 | 279298 |
| Loss from operations | (109767) | (77477) | (373070) | (279298) |
| Other income | 5044 | 7944 | 28176 | 40879 |
| Loss before income taxes | (104723) | (69533) | (344894) | (238419) |
| Income tax recovery (expense) | (538) | 3848 | (1016) | 4089 |
| Net loss | $(105261) | $(65685) | $(345910) | $(234330) |
| Other comprehensive income (loss): |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unrealized gain (loss) on available-for-sale securities | (142) | (2948) | 1947 | (1535) |
| Comprehensive loss | $(105403) | $(68633) | $(343963) | $(235865) |
| Net loss per common share: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Basic and diluted | $(1.31) | $(0.84) | $(4.36) | $(3.01) |
| Weighted average common shares outstanding: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Basic and diluted | 80126081 | 78386640 | 79253751 | 77894643 |

---

------