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): July 1, 2020

ARCH THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (617) 431-2313

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 (see General Instruction A.2. below):

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

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

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. ¨

Item 5.07 Submission of Matters to a Vote of Security Holders.

On July 1, 2020, the Arch Therapeutics, Inc. (the “Company”) held a special meeting of stockholders (the “Special Meeting”) at which the Company’s proposal to increase the total number of authorized shares of common stock that it may issue from 300 million to 800 million (the “Charter Amendment Proposal”) was submitted to a stockholder vote. A more detailed description of the Charter Amendment Proposal is set forth in the Company’s Definitive Proxy Statement filed with the Securities and Exchange Commission on June 5, 2020.

A total of 140,938,895 shares were represented in person or by proxy at the Special Meeting, out of 187,862,947 shares outstanding and entitled to vote as of the record date. Stockholders approved the Charter Amendment, and the following is a tabulation of the voting on the Charter Amendment Proposal presented at the Special Meeting:

Proposal No. 1 – Proposal to Increase the Company’s Authorized Capital to 800,000,000 Shares of Common Stock.

SIGNATURES

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.