UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 4)*

Coresite Realty Corporation

(Name of Issuer)

Preferred Series A 7.25%

(Title of Class of Securities)

21870Q204

(CUSIP Number)

February 28, 2017

(Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☑	Rule 13d-1(b)

☐	Rule 13d-1(c)

☐	Rule 13d-1(d)

^* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 

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Item  1.

 

(a)

Name of Issuer

Coresite Realty Corporation

(b)

Address of Issuer’s Principal Executive Offices

1001 17th Street, Suite 500, Denver, Colorado 80202

Item  2.

 

(a)

Name of Person Filing

Heitman Real Estate Securities LLC

(b)

Address of the Principal Office or, if none, residence

191 N. Wacker Drive, Suite 2500

Chicago, IL 60606

(c)

Citizenship

Delaware

(d)

Title of Class of Securities

Preferred Series A 7.25%

(e)

CUSIP Number

21870Q204

Item  3.

If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

 

 

Item  4.

Ownership.

 

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:  232,255

(b)

Percent of class:  5.05%

(c)

Number of shares as to which the person has:  232,255

(i)

Sole power to vote or to direct the vote  232,255

(ii)

Shared power to vote or to direct the vote  0

(iii)

Sole power to dispose or to direct the disposition of  232,255

(iv)

Shared power to dispose or to direct the disposition of  0

Instruction. For computations regarding securities which represent a right to acquire an underlying security see §240.13d-3(d)(1).

Item  5.

Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following     ☐.

Instruction. Dissolution of a group requires a response to this item.

Item  6.

Ownership of More than Five Percent on Behalf of Another Person.

 Heitman Real Estate Securities LLC serves as an SEC-registered investment adviser or sub-adviser to various funds and separate account clients. Heitman Real Estate Securities LLC has been given dispositive power by its clients for the right to receive or the power to direct the receipt of dividends from, or proceeds from the sale of 232,255 shares, 5.05% of this issue.

Item  7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Item  8.

Identification and Classification of Members of the Group.

Item  9.

Notice of Dissolution of Group.

 

Item 10.

Certification.

 

(a)

The following certification shall be included if the statement is filed pursuant to §240.13d-1(b):

 

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

(b)

The following certification shall be included if the statement is filed pursuant to §240.13d-1(c):

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

 

 

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