Company: HSDTW
Filing Date: 2025-05-02
Form Type: DEF 14A
Source: 0001104659-25-044128
Chunk: 3

Company: Solana Co
Filing Date: 2025-05-02
Form: DEF 14A
Chunk 3
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 the number of shares of Class A common stock you own . Whether or not you plan to virtually attend the Special Meeting, you are respectfully requested by the Board of Directors to promptly submit your proxy by telephone or over the Internet in accordance with the instructions on the proxy card or voting instruction card or sign, date and return the proxy card or voting instruction card. If you received this notice and the accompanying proxy statement in the mail, a return envelope is enclosed for your convenience. This will not prevent you from voting at the Special Meeting since you may revoke your proxy at any time prior to the Special Meeting or vote electronically at the Special Meeting, but submitting your proxy will help to ensure the presence of a quorum at the Special Meeting and avoid added proxy solicitation costs.

By Order of the Board of Directors,

Jeffrey S. Mathiesen 
 Chief Financial Officer, Treasurer and Secretary

Newtown, Pennsylvania 
 May 2, 2025

<div align='center'>**Important Notice Regarding the Availability of Proxy Materials for the 
 Helius Medical Technologies, Inc. Special Meeting of Stockholders to be Held on May 23, 2025:

The Notice of Special Meeting of Stockholders, accompanying proxy statement and annual report to**</div>

#### stockholders are available at www.proxyvote.com.
**TABLE OF CONTENTS

TABLE OF CONTENTS**

| ​ | QUESTIONS AND ANSWERS ABOUT THE SPECIAL MEETING          | ​ | ​ | ​ | ​ |  1 | ​ | ​ |
| ​ | PROPOSAL 1 — REVERSE STOCK SPLIT                         | ​ | ​ | ​ | ​ |  4 | ​ | ​ |
| ​ | PROPOSAL 2 — INCREASE OF AUTHORIZED SHARES               | ​ | ​ | ​ | ​ | 12 | ​ | ​ |
| ​ | PROPOSAL 3 — POTENTIAL FINANCING ISSUANCES               | ​ | ​ | ​ | ​ | 14 | ​ | ​ |
| ​ | PROPOSAL 4 — AMENDMENT TO THE 2022 EQUITY INCENTIVE PLAN | ​ | ​ | ​ | ​ | 16 | ​ | ​ |
| ​ | PROPOSAL 5 — ADJOURNMENT OF SPECIAL MEETING              | ​ | ​ | ​ | ​ | 24 | ​ | ​ |
| ​ | ADDITIONAL MATTERS                                       | ​ | ​ | ​ |