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): June 16, 2016

Blackstone Mortgage Trust, Inc.

(Exact name of registrant as specified in its charter)

345 Park Avenue, 42nd Floor

New York, New York 10154

(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code: (212) 655-0220

Not Applicable

(Former Name or 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:

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On June 16, 2016, Blackstone Mortgage Trust, Inc. (the “Company”) held its 2016 annual meeting of stockholders (the “Annual Meeting”) at which the Company’s stockholders approved the Blackstone Mortgage Trust, Inc. 2016 Stock Incentive Plan (the “2016 Stock Incentive Plan”) and the Blackstone Mortgage Trust, Inc. 2016 Manager Incentive Plan (the “2016 Manager Plan”). The 2016 Stock Incentive Plan and the 2016 Manager Plan became effective as of the date of such stockholder approval.

The material features of the 2016 Stock Incentive Plan are described in the Company’s definitive proxy statement for the Annual Meeting filed on April 21, 2016 (the “Proxy Statement”) in the section entitled “Proposal 3 – Approval of Blackstone Mortgage Trust, Inc. 2016 Stock Incentive Plan”, which is incorporated herein by reference as Exhibit 99.1. Such description is qualified in its entirety by reference to the 2016 Stock Incentive Plan, which is filed as Exhibit 10.1 hereto and is incorporated herein by reference.

The material features of the 2016 Manager Plan are described in the Company’s Proxy Statement in the section entitled “Proposal 4 – Approval of Blackstone Mortgage Trust, Inc. 2016 Manager Incentive Plan”, which is incorporated herein by reference as Exhibit 99.2. Such description is qualified in its entirety by reference to the 2016 Manager Plan, which is filed as Exhibit 10.2 hereto and is incorporated herein by reference.

On June 16, 2016, the Company held its Annual Meeting. A quorum was present at the meeting, as required by the Company’s Fourth Amended and Restated Bylaws. The immediately following charts set forth the number of votes cast for and against, and the number of abstention votes and broker non-votes, with respect to each matter voted upon by the stockholders.

Proposal 1 – Election of Directors

The following eight individuals were elected to the Company’s Board of Directors to serve as directors until the next annual meeting of stockholders and until their successors have been duly elected and qualified.

Proposal 2 – Ratification of the Appointment of Deloitte & Touche LLP as the Company’s Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2016

The appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2016, was ratified.

Proposal 3 – Approval of the Blackstone Mortgage Trust, Inc. 2016 Stock Incentive Plan

The Blackstone Mortgage Trust, Inc. 2016 Stock Incentive Plan was approved.

Proposal 4– Approval the Blackstone Mortgage Trust, Inc. 2016 Manager Incentive Plan

The Blackstone Mortgage Trust, Inc. 2016 Manager Incentive Plan was approved.

Proposal 5 – Advisory Vote on Executive Compensation: To Approve in a Non-binding, Advisory Vote, the Compensation Paid to Our Named Executive Officers

The stockholders approved, on an advisory, non-binding basis, the compensation paid to our named executive officers.

(d) Exhibits

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.