8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OFTHE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported):

August 17, 2021

STAG INDUSTRIAL, INC.

(Exact name of registrant specified in its charter)

One Federal Street, 23rd Floor

Boston, Massachusetts 02110

(Address of principal executive offices, zip code)

Registrant’s telephone number, including

area code: (617) 574-4777

Not applicable

(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))

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 and 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 August 17, 2021, STAG Industrial, Inc., a Maryland corporation (the “Company”), and David G. King, the Company’s Executive Vice President and Director of Real Estate Operations, agreed that Mr. King’s employment with the Company would terminate effective September 17, 2021.

Pursuant to the terms and conditions of the Executive Employment Agreement and the several LTIP Unit Agreements and Performance Award Agreements between the Company and Mr. King, and provided certain conditions are met, Mr. King will receive a severance package from the Company, including a lump sum cash payment, the continuation of certain insurance benefits, immediate vesting of outstanding LTIP units and eligibility to receive a pro-rated award payment for outstanding performance units. The Company currently estimates that it will recognize an expense in accordance with generally accepted accounting principles of approximately $2.2 million as a result of the above items (together with compensation through September 17), approximately $0.5 million of which is expected to be non-cash expense.

Forward-Looking Statements

Thisreport, together with other statements and information publicly disseminated by the Company, contains certain forward-looking statementswithin the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Actof 1934, as amended. The Company intends such forward-looking statements to be covered by the safe harbor provisions for forward-lookingstatements contained in the Private Securities Litigation Reform Act of 1995 and includes this statement for purposes of complying withthese safe harbor provisions. Forward-looking statements, which are based on certain assumptions and describe the Company’s futureplans, strategies and expectations, are generally identifiable by use of the words “believe,” “will,” “expect,”“intend,” “anticipate,” “estimate,” “should,” “project” or similar expressions.Forward-looking statements in this report include statements about the expected severance package and estimated cash and non-cash expensesassociated with the termination of employment. You should not rely on forward-looking statements because they involve known and unknownrisks, uncertainties and other factors that are, in some cases, beyond the Company’s control and which could materially affect actualresults, performances or achievements. Factors that may cause actual results to differ materially from current expectations include, butare not limited to, the terms and conditions of any separation or release agreement entered into by the Company, the possibility of litigationor arbitration and the risk factors discussed in the Company’s annual report on Form 10-K for the year ended December 31,2020, as updated by the Company’s quarterly reports on Form 10-Q. Accordingly, there is no assurance that the Company’sexpectations will be realized. Except as otherwise required by the federal securities laws, the Company disclaims any obligation or undertakingto release publicly any updates or revisions to any forward-looking statement contained herein (or elsewhere) to reflect any change inthe Company’s expectations with regard thereto or any change in events, conditions or circumstances on which any such statementis based.

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.