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

September 25, 2019

Date of Report (Date of earliest event reported)

PLYMOUTH INDUSTRIAL REIT, INC.

(Exact Name of Registrant as Specified in Its Charter)

260 Franklin Street, 7th Floor

Boston, MA 02110

(Address of Principal Executive Offices) (Zip Code)

(617) 340-3814

(Registrant’s Telephone Number, Including Area Code)

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):

Indicate by check mark whether the registrant is an emerging growth company as defined in 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.   ¨

Item 1.01   Entry into a Material Definitive Agreement.

Underwriting Agreement

On September 25, 2019, Plymouth Industrial REIT, Inc. (the “Company”) and Plymouth Industrial OP, LP, the Company’s operating partnership (the “Operating Partnership”), entered into an Underwriting Agreement (the “Underwriting Agreement”) with Barclays Capital Inc., KeyBanc Capital Markets Inc., and J.P. Morgan Securities LLC as representatives (the “Representatives”) of the several underwriters named therein (the “Underwriters”), for the sale of 3,000,000 shares of the Company’s common stock, par value $0.01 per share (the “Common Stock”), at a public offering price of $18.00 per share. Pursuant to the terms of the Underwriting Agreement, the Company granted the Underwriters a 30-day option to purchase up to an additional 450,000 shares of Common Stock at the public offering price of $18.00 per share. The Company estimates that the net proceeds from the offering, after deducting underwriting discounts and commissions and estimated offering expenses paid or payable by the Company, will be approximately $51.1 million (or approximately $58.8 million if the Underwriters’ option to purchase additional shares is exercised in full).

The offering was made pursuant to a registration statement on Form S-3 filed with the Securities and Exchange Commission (the “SEC”) on July 30, 2018 (File No. 333-226438), which was declared effective by the SEC on August 10, 2018, and a prospectus supplement, dated September 25, 2019, filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Securities Act”).

The Company and the Operating Partnership made certain customary representations, warranties and covenants concerning the Company, the Operating Partnership and the registration statement in the Underwriting Agreement and also agreed to indemnify the Underwriters against certain liabilities, including liabilities under the Securities Act, or to contribute to payments the Underwriters may be required to make in respect of those liabilities. The offering is expected to close on September 30, 2019 subject to certain customary closing conditions.

The foregoing summary is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01   Financial Statements and Exhibits.

SIGNATURES

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