Company: HSDTW
Filing Date: 2025-03-26
Form Type: 424B5
Source: 0001104659-25-028242
Chunk: 0

Company: Solana Co
Filing Date: 2025-03-26
Form: 424B5
Chunk 0
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TABLE OF CONTENTS

#### Filed Pursuant to Rule 424(b)(5)​

#### Registration No. 333-270433​

### PROSPECTUS SUPPLEMENT
**(To Prospectus Supplement dated June 23, 2023**

#### and Prospectus Dated May 25, 2023)

#### Helius Medical Technologies, Inc.

#### Up to $1,444,764Class A Common Stock
**This prospectus supplement amends and supplements the information in the sales agreement prospectus, dated May 25, 2023 (the “Prospectus”), filed with the Securities and Exchange Commission as a part of our registration statement on Form S-3 (File No. 333-270433), as supplemented by our prospectus supplement, dated June 23, 2023 (the “Original Prospectus Supplement,” and together with the Prospectus, the “Prior Prospectus”), relating to the offer and sale of shares of our Class A common stock, par value $0.001 per share (“common stock”), pursuant to the Sale Agreement, dated June 23, 2023 (the “Sales Agreement”), we previously entered into with Roth Capital Partners, LLC (“Roth”). This prospectus supplement should be read in conjunction with the Prior Prospectus, and is qualified by reference thereto, except to the extent that the information herein amends or supersedes the information contained in the Prior Prospectus. This prospectus supplement is not complete without, and may only be delivered or utilized in connection with, the Prior Prospectus and any future amendments or supplements thereto.

Under the Original Prospectus Supplement, we initially registered up to $1,950,000 of our common stock for offer and sale pursuant to the Sales Agreement. As of the date of this prospectus supplement, we have sold 294,511 shares of our common stock for aggregate gross sale proceeds of $1,949,869 in accordance with the Sales Agreement. We are filing this prospectus supplement to amend the Prior Prospectus to update the amount of shares we are eligible to sell under General Instruction I.B.6 of Form S-3, which limits the amount that we may sell under the registration statement of which this prospectus supplement and the Prior Prospectus are a part. After giving effect to these limitations and the current market value of shares of our common stock held by non-affiliates, and after giving effect to the terms of the Sales Agreement, we currently may offer and sell shares of our common stock having an aggregate