Exhibit 99.1

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Craig Colosso Relationship Management |
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American Stock Transfer & Trust Company, LLC |
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March 12, 2021
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Alberta Securities Commission |
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British Columbia Securities Commission |
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Ontario Securities Commission |
RE: Xenon Pharmaceuticals Inc.
Pursuant to a request from the above-mentioned reporting issuer, we wish to advise you of the following information in connection with its Annual Meeting of Shareholders:
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Date of meeting: |
June 3, 2021 |
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Record date for notice: |
April 8, 2021 |
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Record date for voting: |
April 8, 2021 |
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Beneficial ownership determination date: |
April 8, 2021 |
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Securities entitled to notice: |
Common Shares and Series 1 Preferred Shares |
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Securities entitled to vote: |
Common Shares and Series 1 Preferred Shares |
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Issuer mailing directly to non objecting beneficial owners: |
No |
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Issuer will pay for objecting beneficial owner material distribution: |
Yes |
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Issuer using notice-and-access for registered investors: |
No |
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Issuer using notice-and-access for non-registered investors: |
No |
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Notice-and-access stratification criteria: |
N/A |
Yours very truly,
/s/ Craig Colosso
Craig Colosso
Relationship Manager
American Stock Transfer & Trust Company, LLC