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):  September 25, 2018

CYRUSONE INC.

(Exact Name of Registrant as Specified in its Charter)

2101 Cedar Springs Road, Suite 900
Dallas, TX 75201
(Address of Principal Executive Office)

Registrant’s telephone number, including area code: (972) 350-0060

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):

o            Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o            Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o            Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o            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 (17 CFR § 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR § 240.12b-2).

Emerging growth company o

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. o

ITEM 8.01 — OTHER EVENTS

On September 25, 2018, CyrusOne Inc. (“CyrusOne”) issued a press release announcing that it had commenced the public offering (the “Offering”) of 8,000,000 shares of its common stock, of which 5,500,000 shares were offered directly by CyrusOne, and 2,500,000 shares were offered, at the request of CyrusOne, by Morgan Stanley & Co. LLC or its affiliate in connection with a forward sale agreement. A copy of this press release is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

On September 26, 2018, CyrusOne issued a press release announcing that it had priced the Offering at a price to the public of $62.00 per share. CyrusOne granted the underwriters an option to purchase up to 1,200,000 additional shares of its common stock in connection with the Offering. A copy of this press release is furnished herewith as Exhibit 99.2 and is incorporated herein by reference.

ITEM 9.01 — FINANCIAL STATEMENTS AND EXHIBITS

(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.