# EDGAR Filing Document

**Accession Number:** 0001610853
**File Stem:** 0001104659-25-100076
**Filing Date:** 2025-10
**Character Count:** 8778
**Document Hash:** 1e8edd3e162d4f58c1287cd0f18ff1c5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-100076.hdr.sgml**: 20251016

**ACCESSION NUMBER**: 0001104659-25-100076

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20251015

**ITEM INFORMATION**: Changes in Registrant's Certifying Accountant

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251016

**DATE AS OF CHANGE**: 20251016

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Solana Co
- **CENTRAL INDEX KEY:** 0001610853
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 364787690
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38445
- **FILM NUMBER:** 251397663

**BUSINESS ADDRESS:**
- **STREET 1:** 642 NEWTOWN YARDLEY ROAD
- **CITY:** NEWTOWN
- **STATE:** PA
- **ZIP:** 18940
- **BUSINESS PHONE:** 215-944-6100

**MAIL ADDRESS:**
- **STREET 1:** 642 NEWTOWN YARDLEY ROAD
- **CITY:** NEWTOWN
- **STATE:** PA
- **ZIP:** 18940

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** HELIUS MEDICAL TECHNOLOGIES, INC.
- **DATE OF NAME CHANGE:** 20180525

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** HELIUS MEDICAL TECHNOLOGIES, INC
- **DATE OF NAME CHANGE:** 20180517

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** HELIUS MEDICAL TECHNOLOGIES, INC.
- **DATE OF NAME CHANGE:** 20140613

?xml version='1.0' encoding='ASCII'? SOLANA COMPANY_October 15, 2025

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported): October 15, 2025**

![Graphic](hsdt-20251015x8k001.jpg)

## SOLANA COMPANY
**(Exact name of registrant as specified in its charter)**

---

| | | |
|:---|:---|:---|
| -<br>|  |  |
| **Delaware** | **001-38445** | **36-4787690** |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission File Number)** | **(IRS Employer**<br>**Identification No.)** |
| **642 Newtown Yardley Road, Suite 100**<br>**Newtown, PA** |  | **18940** |
| **(Address of principal executive offices)** |  | **(Zip Code)** |

---

**Registrant's telephone number, including area code: (215) 944-6100**

**N/A**

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br>**Symbol(s)** | **Name of each exchange on which registered** |
| Class A Common Stock, $0.001 par value | HSDT | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 4.01** **Changes in Registrant's Certifying Accountant.**

*(a) Resignation of Previous Independent Registered Public Accounting Firm*

On October 15, 2025, the Audit Committee (the "Committee") of the Board of Directors of Solana Corporation (formerly known as Helius Medical Technologies, Inc.) (the "Company") received the resignation of Baker Tilly US, LLP ("Baker Tilly") as the Company's independent registered public accounting firm, effective immediately. The Committee accepted Baker Tilly's resignation.

The reports of Baker Tilly on the Company's consolidated financial statements for each of the two most recent fiscal years ended December 31, 2024 and 2023 did not contain an adverse opinion or disclaimer of opinion, and were not qualified or modified as to uncertainty, audit scope, or accounting principles, except that such reports contained an explanatory paragraph expressing substantial doubt as to the Company's ability to continue as a going concern.

During the Company's two most recent fiscal years ended December 31, 2024 and 2023 and the subsequent interim period through October 15, 2025, there were (a) no "disagreements" (as that term is described in Item 304(a)(1)(iv) of Regulation S-K promulgated under the Securities Exchange Act of 1934, as amended ("Regulation S-K") and the related instructions) with Baker Tilly on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which disagreements, if not resolved to the satisfaction of Baker Tilly, would have caused it to make reference to the subject matter of the disagreements in connection with its reports and (b) no "reportable events," as defined in Item 304(a)(1)(v) of Regulation S-K and the related instructions.

The Company provided Baker Tilly with a copy of the foregoing disclosures and requested that Baker Tilly furnish a letter addressed to the Securities and Exchange Commission stating whether or not it agrees with the statements made herein, as specified by Item 304(a)(3) of Regulation S-K. A copy of Baker Tilly's letter, dated October 16, 2025, is filed as Exhibit 16.1 to this Current Report on Form 8-K.

*(b) Engagement of New Independent Registered Public Accounting Firm*

On October 15, 2025, the Committee approved the appointment of CBIZ CPAs P.C. ("CBIZ CPAs") as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2025.

During the Company's two most recent fiscal years ended December 31, 2024 and 2023 and the subsequent interim period through October 15, 2025, neither the Company nor anyone on its behalf consulted with CBIZ CPAs regarding: (i) the application of accounting principles to a specific transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company's consolidated financial statements, and neither a written report or oral advice was provided to the Company that CBIZ CPAs concluded was an important factor considered by the Company in reaching a decision as to any accounting, auditing, or financial reporting issue, (ii) any matter that was the subject of a "disagreement" within the meaning of Item 304(a)(1)(iv) of Regulation S-K and the related instructions, or (iii) any reportable event within the meaning of Item 304(a)(1)(v) of Regulation S-K and the related instructions.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.** |

---

 **(d) Exhibits**

---

| | |
|:---|:---|
| Exhibit No.  | Description  |
| 16.1 | [Letter from Baker Tilly US, LLP to the Securities and Exchange Commission, dated October 16, 2025](hsdt-20251015xex16d1.htm). |
| 104 | Cover Page Interactive Data File (embedded within Inline XBRL document). |

---

**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **SOLANA COMPANY.** | **SOLANA COMPANY.** |
| Dated: October 16, 2025 | By: | /s/ Jeffrey S. Mathiesen |
|  |  | Jeffrey S. Mathiesen |
|  |  | Chief Financial Officer, Treasurer and Secretary |

---

## Exhibit 16.1

**Exhibit 16.1**

October 16, 2025

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Dear Ladies and Gentlemen:

We are the former independent registered public accounting firm for Solana Company (formerly known as Helius Medical Technologies, Inc.) (the "Company"). We have read the Company's disclosure set forth in Item 4.01 "Changes in Registrant's Certifying Accountant" of the Company's Current Report on Form 8-K dated October 16, 2025 (the "Current Report") and are in agreement with the disclosure in the Current Report, insofar as it pertains to our firm.

Sincerely,

Baker Tilly US, LLP

/s/ Baker Tilly US, LLP

------