CoreSite Realty SC 13G/A CoreSite Realty / Carlyle ownership change

Securities and Exchange Commission

Washington, D.C. 20549

Schedule 13G

(Rule 13d-102)

Information to be Included in Statements Filed Pursuant

to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed

Pursuant to § 240.13d-2

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)*

CoreSite Realty Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

21870Q105

(CUSIP Number)

December 31, 2020

(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 the disclosures provided in a prior cover page.

The information required in 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).

CUSIP No. 21870Q105 Schedule 13G Page 1 of 37

1	Names of Reporting Persons   The Carlyle Group Inc.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   CO

CUSIP No. 21870Q105 Schedule 13G Page 2 of 37

1	Names of Reporting Persons   Carlyle Group Management L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 3 of 37

1	Names of Reporting Persons   Carlyle Holdings I GP Inc.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   CO

CUSIP No. 21870Q105 Schedule 13G Page 4 of 37

1	Names of Reporting Persons   Carlyle Holdings I GP Sub L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 5 of 37

1	Names of Reporting Persons   Carlyle Holdings I L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 6 of 37

1	Names of Reporting Persons   CG Subsidiary Holdings L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 7 of 37

1	Names of Reporting Persons   TC Group, L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 8 of 37

1	Names of Reporting Persons   TC Group Sub L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 9 of 37

1	Names of Reporting Persons   Carlyle Realty V GP, L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 10 of 37

1	Names of Reporting Persons   Carlyle Realty V, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 11 of 37

1	Names of Reporting Persons   CoreSite CRP V Holdings, LLC
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   5,875,218
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   5,875,218

9	Aggregate Amount Beneficially Owned by Each Reporting Person   5,875,218
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   12.1%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 12 of 37

1	Names of Reporting Persons   Carlyle Realty III, GP, L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 13 of 37

1	Names of Reporting Persons   Carlyle Realty III, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 14 of 37

1	Names of Reporting Persons   CoreSite CRP III Holdings, LLC
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 15 of 37

1	Names of Reporting Persons   Carlyle Realty IV GP, L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 16 of 37

1	Names of Reporting Persons   Carlyle Realty IV, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 17 of 37

1	Names of Reporting Persons   CoreSite CRP IV Holdings, LLC
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 18 of 37

1	Names of Reporting Persons   CRP IV AIV GP, L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 19 of 37

1	Names of Reporting Persons   CRP IV AIV GP, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 20 of 37

1	Names of Reporting Persons   CRQP IV AIV, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 21 of 37

1	Names of Reporting Persons   CRP IV-A AIV, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 22 of 37

1	Names of Reporting Persons   CoreSite CRP IV Holdings (VCOC II), LLC
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only ��
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 23 of 37

1	Names of Reporting Persons   CoreSite CRP IV Holdings (VCOC I), LLC
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 24 of 37

1	Names of Reporting Persons   CRP III AIV GP, L.L.C.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 25 of 37

1	Names of Reporting Persons   CRP III AIV GP, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 26 of 37

1	Names of Reporting Persons   CRQP III AIV, L.P.
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   PN

CUSIP No. 21870Q105 Schedule 13G Page 27 of 37

1	Names of Reporting Persons   CoreSite CRP III Holdings (VCOC), LLC
2	Check the Appropriate Box if a Member of a Group   (a)  ☐        (b)  ☐
3	SEC Use Only
4	Citizenship or Place of Organization   Delaware

Number of Shares  Beneficially  Owned by Each Reporting Person With	5	Sole Voting Power   0
	6	Shared Voting Power   0
	7	Sole Dispositive Power   0
	8	Shared Dispositive Power   0

9	Aggregate Amount Beneficially Owned by Each Reporting Person   0
10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares   Not Applicable
11	Percent of Class Represented by Amount in Row 9   0%
12	Type of Reporting Person   OO (Limited Liability Company)

CUSIP No. 21870Q105 Schedule 13G Page 28 of 37

ITEM 1. (a) Name of Issuer:

CoreSite Realty Corporation (the “Issuer”)

(b) Address of Issuer’s Principal Executive Offices:

1001 17^th Street, Suite 500

Denver, CO 80202

ITEM 2. (a) Name of Person Filing:

Each of the following is hereinafter individually referred to as a “Reporting Person” and collectively as the “Reporting Persons.” This statement is filed on behalf of:

Carlyle Group Management L.L.C.

The Carlyle Group Inc.

Carlyle Holdings I GP Inc.

Carlyle Holdings I GP Sub L.L.C.

Carlyle Holdings I L.P.

CG Subsidiary Holdings L.L.C.

TC Group, L.L.C.

TC Group Sub L.P.

Carlyle Realty V GP, L.L.C.

Carlyle Realty V, L.P.

CoreSite CRP V Holdings, LLC

Carlyle Realty III, GP, L.L.C.

Carlyle Realty III, L.P.

CoreSite CRP III Holdings, LLC

Carlyle Realty IV GP, L.L.C.

Carlyle Realty IV, L.P.

CoreSite CRP IV Holdings, LLC

CRP IV AIV GP, L.L.C.

CRP IV AIV GP, L.P.

CRQP IV AIV, L.P.

CRP IV-A AIV, L.P.

CoreSite CRP IV Holdings (VCOC II), LLC

CoreSite CRP IV Holdings (VCOC I), LLC

CRP III AIV GP, L.L.C.

CRP III AIV GP, L.P.

CRQP III AIV, L.P.

CoreSite CRP III Holdings (VCOC), LLC

(b) Address of Principal Business Office:

The address for each of the Reporting Persons is c/o The Carlyle Group, 1001 Pennsylvania Ave. NW, Suite 220 South, Washington, D.C. 20004-2505.

CUSIP No. 21870Q105 Schedule 13G Page 29 of 37

(c) Citizenship of each Reporting Person is:

Each of the Reporting Persons is organized under the laws of the state of Delaware.

(d) Title of Class of Securities:

Common stock, par value $0.01 per share (“Common Stock”).

(e) CUSIP Number:

21870Q105

ITEM 3.

Not applicable.

ITEM 4. Ownership.

(a-c)

The ownership information presented below represents beneficial ownership of shares of Common Stock as of December 31, 2020, assuming that all limited partnership units of CoreSite, L.P. (“OP Units”) owned by the Reporting Persons are converted on a one-for-one basis into shares of Common Stock. Under the limited partnership agreement governing CoreSite, L.P., OP Units may be redeemed for cash or, at the election of the Issuer, for shares of Common Stock on a one-for-one basis. The percent of class presented below is based upon 42,766,575 shares of Common Stock outstanding as of October 28, 2020.

Reporting Person	Amount beneficially owned		Percent of class:			Sole power to vote or to direct the vote:		Shared power to vote or to direct the vote:		Sole power to dispose or to direct the disposition of:		Shared power to dispose or to direct the disposition of:
Carlyle Group Management L.L.C.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
The Carlyle Group Inc.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
Carlyle Holdings I GP Inc.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
Carlyle Holdings I GP Sub L.L.C.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
Carlyle Holdings I L.P.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
CG Subsidiary Holdings L.L.C.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
TC Group, L.L.C.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
TC Group Sub L.P.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
Carlyle Realty V GP, L.L.C.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
Carlyle Realty V, L.P.		5,875,218		12.1	%		0		5,875,218		0		5,875,218
CoreSite CRP V Holdings, LLC		5,875,218		12.1	%		0		5,875,218		0		5,875,218
Carlyle Realty III, GP, L.L.C.		0		0	%		0		0		0		0
Carlyle Realty III, L.P.		0		0	%		0		0		0		0
CoreSite CRP III Holdings, LLC		0		0	%		0		0		0		0
Carlyle Realty IV GP, L.L.C.		0		0	%		0		0		0		0

CUSIP No. 21870Q105 Schedule 13G Page 30 of 37

Carlyle Realty IV, L.P.	0	0	%	0	0	0	0
CoreSite CRP IV Holdings, LLC	0	0	%	0	0	0	0
CRP IV AIV GP, L.L.C.	0	0	%	0	0	0	0
CRP IV AIV GP, L.P.	0	0	%	0	0	0	0
CRQP IV AIV, L.P.	0	0	%	0	0	0	0
CRP IV-A AIV, L.P.	0	0	%	0	0	0	0
CoreSite CRP IV Holdings (VCOC II), LLC	0	0	%	0	0	0	0
CoreSite CRP IV Holdings (VCOC I), LLC	0	0	%	0	0	0	0
CRP III AIV GP, L.L.C.	0	0	%	0	0	0	0
CRP III AIV GP, L.P.	0	0	%	0	0	0	0
CRQP III AIV, L.P.	0	0	%	0	0	0	0
CoreSite CRP III Holdings (VCOC), LLC	0	0	%	0	0	0	0

CoreSite CRP V Holdings, LLC is the record holder of the OP Units reported herein.

Carlyle Group Management L.L.C. holds an irrevocable proxy to vote a majority of the shares of The Carlyle Group Inc., which is a publicly traded entity listed on NASDAQ. The Carlyle Group Inc. is the sole shareholder of Carlyle Holdings I GP Inc., which is the managing member of Carlyle Holdings I GP Sub L.L.C., which is the general partner of Carlyle Holdings I L.P., which, with respect to the securities reported herein, is the managing member of CG Subsidiary Holdings L.L.C., which is the managing member of TC Group, L.L.C., which is the general partner of TC Group Sub L.P., which is the sole member of each of Carlyle Realty III GP, L.L.C., CRP III AIV GP, L.L.C., Carlyle Realty IV GP, L.L.C., CRP IV AIV GP, L.L.C. and Carlyle Realty V GP, L.L.C.

Carlyle Realty III GP, L.L.C. is the general partner of Carlyle Realty III, L.P. which is the managing member of CoreSite CRP III Holdings, LLC. CRP III AIV GP, L.L.C. is the general partner of CRP III AIV GP, L.P., which is the general partner of CRQP III AIV, L.P., which is the managing member of CoreSite CRP III Holdings (VCOC), LLC.

Carlyle Realty IV GP, L.L.C. is the general partner of Carlyle Realty IV, L.P., which is the managing member of CoreSite CRP IV Holdings, LLC. CRP IV AIV GP, L.L.C. is the general partner of CRP IV AIV GP, L.P., which is the general partner of each of CRP IV-A AIV, L.P. and CRQP IV AIV, L.P., which are the managing members of CoreSite CRP IV Holdings (VCOC I), LLC and CoreSite CRP IV Holdings (VCOC II), LLC, respectively.

Carlyle Realty V GP, L.L.C. is the general partner of Carlyle Realty V, L.P., which is the managing member of CoreSite CRP V Holdings, LLC.

CUSIP No. 21870Q105 Schedule 13G Page 31 of 37

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 owners of more than five percent of the class of securities, check the following: ☒

This statement is being filed to report that each of the following entities has ceased to be the beneficial owner of more than five percent of the class of securities: Carlyle Realty III, GP, L.L.C., Carlyle Realty III, L.P., CoreSite CRP III Holdings, LLC, Carlyle Realty IV GP, L.L.C., Carlyle Realty IV, L.P., CoreSite CRP IV Holdings, LLC, CRP IV AIV GP, L.L.C., CRP IV AIV GP, L.P., CRQP IV AIV, L.P., CRP IV-A AIV, L.P., CoreSite CRP IV Holdings (VCOC II), LLC, CoreSite CRP IV Holdings (VCOC I), LLC, CRP III AIV GP, L.L.C., CRP III AIV GP, L.P., CRQP III AIV, L.P. and CoreSite CRP III Holdings (VCOC), LLC.

ITEM 6. Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

ITEM 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Not applicable.

ITEM 8. Identification and Classification of Members of the Group.

Not applicable.

ITEM 9. Notice of Dissolution of Group.

Not applicable.

ITEM 10. Certification.

Not applicable.

CUSIP No. 21870Q105 Schedule 13G Page 32 of 37

SIGNATURE

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.

Date: February 12, 2021

CARLYLE GROUP MANAGEMENT L.L.C.
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Chief Financial Officer
THE CARLYLE GROUP INC.
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director and Chief Financial Officer
CARLYLE HOLDINGS I GP INC.
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director and Chief Financial Officer
CARLYLE HOLDINGS I GP SUB L.L.C.
By: Carlyle Holdings I GP Inc., its managing member
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director and Chief Financial Officer
CARLYLE HOLDINGS I L.P.
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director
CG SUBSIDIARY HOLDINGS L.L.C.
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director

CUSIP No. 21870Q105 Schedule 13G Page 33 of 37

TC GROUP, L.L.C.
By: CG Subsidiary Holdings L.L.C., its managing member
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director
TC GROUP SUB L.P.
By: TC Group, L.L.C., its general partner
By: CG Subsidiary Holdings L.L.C., its managing member
By:	/s/ Anne Frederick, attorney-in-fact
Name:	Curtis L. Buser
Title:	Managing Director
CARLYLE REALTY V GP, L.L.C.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CARLYLE REALTY V, L.P.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CORESITE CRP V HOLDINGS, LLC
By: Carlyle Realty V, L.P., its managing member
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CARLYLE REALTY III, GP, L.L.C.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CARLYLE REALTY III, L.P.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person

CUSIP No. 21870Q105 Schedule 13G Page 34 of 37

CORESITE CRP III HOLDINGS, LLC
By: Carlyle Realty III, L.P., its managing member
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRP III AIV GP, L.L.C.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRP III AIV GP, L.P.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRQP III AIV, L.P.
By: CRP III AIV GP, L.P., its general partner
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CORESITE CRP III HOLDINGS (VCOC), LLC
By: CRQP III AIV, L.P., its managing member
By: CRP III AIV GP, L.P., its general partner
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CARLYLE REALTY IV GP, L.L.C.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CARLYLE REALTY IV, L.P.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person

CUSIP No. 21870Q105 Schedule 13G Page 35 of 37

CORESITE CRP IV HOLDINGS, LLC
By: Carlyle Realty IV, L.P., its managing member
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRP IV AIV GP, L.L.C.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRP IV AIV GP, L.P.
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRP IV-A AIV, L.P.
By: CRP IV AIV GP, L.P., its general partner
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CRQP IV AIV, L.P.
By: CRP IV AIV GP, L.P., its general partner
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person
CORESITE CRP IV Holdings (VCOC I), LLC
By: CRQP IV AIV, L.P., its managing member
By: CRP IV AIV GP, L.P., its general partner
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person

CUSIP No. 21870Q105 Schedule 13G Page 36 of 37

CORESITE CRP IV HOLDINGS (VCOC II), LLC
By: CRQP IV AIV, L.P., its managing member
By: CRP IV AIV GP, L.P., its general partner
By:	/s/ Kevin Gasque
Name:	Kevin Gasque
Title:	Authorized Person

CUSIP No. 21870Q105 Schedule 13G Page 37 of 37

LIST OF EXHIBITS

Exhibit No.	Description
24	Power of Attorney (incorporated by reference to Exhibit 24 to the Schedule 13G filed by the Reporting Persons on February 13, 2020).
99	Joint Filing Agreement (incorporated by reference to Exhibit 99 to the Schedule 13G filed by the Reporting Persons on February 13, 2020).