Exhibit 99.1

October 30, 2025

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VIA EMAIL

Joseph Chee, Executive Chairman joseph.chee@solanacompany.co

Solana Company

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Dear Joseph:

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I hereby submit my resignation from the Board of Directors of Solana Company effective October 30, 2025.

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Sincerely,

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/s/ Jeffrey S. Mathiesen

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Jeffrey S. Mathiesen

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