FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * CINCINNATI BELL INC   2. Issuer Name and Ticker or Trading Symbol CyrusOne Inc. [CONE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 221 E FOURTH ST 3. Date of Earliest Transaction (Month/Day/Year) 04/07/2015 (Street) CINCINNATI, OH 45202 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Operating Partnership Units (1)

$ 0

04/07/2015

S

14,260,000

(2)

(3)

Common Stock

14,260,000 (1)

$ 29.8752

12,341,835 (4)

I

See footnote (4)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CINCINNATI BELL INC 221 E FOURTH ST CINCINNATI, OH 45202		X

Signatures

/s/ Christopher J. Wilson		04/09/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	"Operating Partnership Units" are the common units of limited partnership interest in the Issuer's operating partnership, CyrusOne LP, a Maryland limited partnership. Operating Partnership Units are redeemable for cash equal to the then current market value of one share of Common Stock, or at the election of the Issuer, for shares of Common Stock on a one-for-one basis.
(2)	Operating Partnerships Units are redeemable for cash or shares of Common Stock at any time.
(3)	The right to convert Operating Partnership Units into shares of Common Stock has no expiration date.
(4)	Data Centers South Holdings LLC is the record holder of 12,341,835 Operating Partnership Units (the "Controlled OP Units"). Cincinnati Bell Inc. is the sole stockholder of Cincinnati Bell Technology Solutions Inc., which is the sole stockholder of Data Center Investments Inc., which is the sole stockholder of Data Centers South Inc., which is the sole member of Data Centers South Holdings LLC. As a result, Cincinnati Bell Inc. exercises investment discretion and control over the Controlled OP Units.

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