Company: HSDTW
Filing Date: 2025-11-12
Form Type: NT 10-Q
Source: 0001104659-25-110338
Chunk: 0

Company: Solana Co
Filing Date: 2025-11-12
Form: NT 10-Q
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 12b-25

NOTIFICATION OF LATE FILING</div>

Commission File Number 001-42612

CUSIP Number: G2868C 101

| (Check One): |     | ¨ Form 10-K                          
 ¨ Form 20-F ¨ Form 11-K x Form 10-Q  
 ¨ Form 10-D ¨ Form N-CEN             
 ¨ Form N-CSR                         
 For Period Ended: September 30, 2025 |
|:-------------|:----|:-------------------------------------|
|              |     | ¨ Transition Report on Form 10-K     |
|              |     | ¨ Transition Report on Form 20-F     |
|              |     | ¨ Transition Report on Form 11-K     |
|              |     | ¨ Transition Report on Form 10-Q     |
|              |     | For                                  
 the Transition Period Ended:         |

| Nothing in this form shall be construed to imply that the Commission has verified any information contained herein. |

If the notification relates to a portion of the filing checked above,
identify the Item(s) to which the notification relates:

<div align='center'>PART I – REGISTRANT INFORMATION

SOLANA COMPANY

Full Name of Registrant

Helius Medical Technologies, Inc.

Former Name, if Applicable

642 Newtown Yardley Road, Suite 100

Address of Principal Executive Office (Street and
Number)

Newtown, PA 18940

City, State and Zip Code

PART II – RULES 12b-25(b) AND (c)</div>

If the subject report could not be filed without unreasonable effort
or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

| x   | -a                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense; |
| (b) | The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-CEN or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on