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): May 24, 2017

COLONY NORTHSTAR, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (310) 282-8820

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 (see General Instruction A.2. below):

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.    ☐

Item 8.01. Other Events.

In connection with the previously announced underwritten public offering (the “Offering”) of Colony NorthStar, Inc.’s (the “Company”) 7.15% Series I Cumulative Redeemable Perpetual Preferred Stock, par value $0.01 per share (the “Series I Preferred Stock”), the Company entered into an Underwriting Agreement (the “Underwriting Agreement”), dated May 24, 2017, by and among the Company, Colony Capital Operating Company, LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, RBC Capital Markets, LLC and UBS Securities LLC, as representatives of the several underwriters named therein (the “Underwriters”). Pursuant to the Underwriting Agreement, the Company agreed to offer and sell 13,800,000 shares of its Series I Preferred Stock to the Underwriters, including 1,800,000 shares pursuant to the exercise in full of the Underwriters’ option to purchase additional shares. The Series I Preferred Stock was offered to the public at a price of $25.00 per share, and was offered to the Underwriters at a price of $24.2125 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 1,800,000 shares of Series I Preferred Stock that was exercised in full. The Company estimates that the net proceeds from the Offering, after deducting underwriting discounts and commissions and estimated offering expenses payable by the Company, will be approximately $333.5 million.

The Company intends to use the net proceeds of the Offering to redeem all of the issued and outstanding shares of each of its 8.75% Series A Cumulative Redeemable Perpetual Preferred Stock (the “Series A Preferred Stock”) and 8.50% Series F Cumulative Redeemable Perpetual Preferred Stock (the “Series F Preferred Stock”) and to use any remaining net proceeds for other general corporate purposes.

The Company made certain customary representations, warranties and covenants concerning the Company and the registration statement in the Underwriting Agreement and also agreed to indemnify the Underwriters against certain liabilities, including liabilities under the Securities Exchange Act of 1934, as amended. The closing of the Offering is subject to customary closing conditions pursuant to the terms of the Underwriting Agreement.

Certain affiliates of the Underwriters own shares of the Company’s Series A Preferred Stock or Series F Preferred Stock, which may be redeemed using the net proceeds of the Offering. In addition, the Underwriters and their affiliates have engaged in investment banking and other commercial dealings in the ordinary course of business with the Company or its affiliates and may therefore have an interest in the successful completion of this offering beyond the underwriting discounts and commissions they will receive in connection with the Offering.

A copy of the Underwriting Agreement is attached to this report as Exhibit 99.1 and incorporated herein by reference. The summary of the Underwriting Agreement set forth above is qualified in its entirety by reference to Exhibit 99.1.

In addition, the Company delivered notice on May 24, 2017 to holders of the Series A Preferred Stock and holders of the Series F Preferred Stock that on June 23, 2017 (the “Redemption Date”), it intends to redeem all of the issued and outstanding Series A Preferred Stock and all of the issued and outstanding shares of Series F Preferred Stock. Each share of Series A Preferred Stock will be redeemed at the redemption price of $25.00 per share, plus an amount equal to any accrued and unpaid dividends (whether or not declared) on each share of Series A Preferred Stock to be redeemed from May 15, 2017 up to, but not including, the Redemption Date. Each share of Series F Preferred Stock will be redeemed at the redemption price of $25.00 per share, plus an amount equal to any accrued and unpaid dividends (whether or not declared) on each share of Series F Preferred Stock to be redeemed from April 15, 2017 up to, but not including, the Redemption Date. The redemption of the Series A Preferred Stock and the Series F Preferred Stock is contingent upon the closing of the Offering, which is expected to occur on or about June 5, 2017.

Dividends on the shares of Series A Preferred Stock and on the shares of Series F Preferred Stock that are to be redeemed will cease to accrue on the Redemption Date. Upon redemption, the shares of Series A Preferred Stock and the shares of Series F Preferred Stock will no longer be outstanding, and all rights of the holders will terminate, except the right of the holders to receive the cash payable upon such redemption, without interest. All shares of Series A Preferred Stock and all shares of Series F Preferred Stock are held in book-entry form through the Depository Trust Company (“DTC”). The Series A Preferred Stock and the Series F Preferred Stock will be redeemed in accordance with the procedures of DTC. Upon redemption, the Series A Preferred Stock and Series F Preferred Stock will be delisted from trading on the New York Stock Exchange.

A copy of the Company’s press releases announcing the redemption of the Series A Preferred Stock and the Series F Preferred Stock are filed as Exhibits 99.2 and 99.3, respectively, hereto.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

SIGNATURES

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

EXHIBIT INDEX