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

November 14, 2018

Date of Report (Date of earliest event reported)

HELIUS MEDICAL TECHNOLOGIES, INC.

(Exact name of registrant as specified in its charter)

642 Newtown Yardley Road, Suite 100

Newtown, Pennsylvania, 18940

(Address of principal executive offices) (Zip Code)

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

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:

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  ☑

On November 15, 2018, Helius Medical Technologies, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with BTIG, LLC and Oppenheimer & Co. Inc., as representatives of the underwriters (the “Underwriters”), to issue and sell 2,121,212 shares of Class A common stock of the Company (“Common Stock”), in an underwritten public offering (the “Offering”). The offering price to the public is $8.25 per share of Common Stock, and the Underwriters have agreed to purchase the shares from the Company pursuant to the Underwriting Agreement at a price of $7.755 per share. In addition, the Company granted the Underwriters an option to purchase, for a period of 30 days, up to an additional 318,182 shares of Common Stock. The Company estimates that the net proceeds from the Offering will be approximately $15.7 million, or approximately $18.2 million if the Underwriters exercise in full their option to purchase additional shares of Common Stock, in each case after deducting underwriting discounts and commissions and estimated offering expenses. The closing of the Offering is expected to occur on November 19, 2018, subject to customary closing conditions.

The offering is being made in the United States pursuant to the Company’s effective registration statement on Form S-3 (Registration Statement No. 333-215286) and an accompanying prospectus previously filed with the Securities and Exchange Commission and a preliminary and final prospectus supplement thereunder, and in Canada pursuant to the Company’s MJDS short form base shelf prospectus previously filed with the securities regulatory authorities in all provinces of Canada, pursuant to the Multijurisdictional Disclosure System, and a preliminary and final prospectus supplement thereunder.

The Underwriting Agreement contains customary representations, warranties, covenants and agreements by the Company, indemnification obligations of the Company and the Underwriters, including for liabilities under the Securities Act of 1933, as amended (the “Securities Act”), other obligations of the parties and termination provisions. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of such agreement and as of specific dates, were solely for the benefit of the parties to such agreement, and may be subject to limitations agreed upon by the contracting parties. A copy of the Underwriting Agreement is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference. The foregoing description of the Underwriting Agreement is qualified in its entirety by reference to such exhibit. A copy of the opinion of Cooley LLP as to the legality of the shares of Common Stock to be issued and sold in the Offering and related consent is filed as Exhibit 5.1 to this Current Report on Form 8-K.

On November 14, 2018, the Company issued a press release announcing the proposed Offering. On November 15, 2018, the Company issued a press release announcing that it had priced the Offering. Copies of the press releases are filed as Exhibit 99.1 and Exhibit 99.2, respectively, to this Current Report on Form 8-K and are incorporated herein by reference.

(d) Exhibits

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.