Carlyle Group Inc. — Director's Dealing 2016

May 17, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CoreSite Realty Corp (COR)
CIK: 0001490892
Period of Report: 2016-05-13

Reporting Person: Carlyle Group Management L.L.C. (10% Owner)
Reporting Person: Carlyle Group L.P. (10% Owner)
Reporting Person: Carlyle Holdings I GP Inc. (10% Owner)
Reporting Person: Carlyle Holdings I GP Sub L.L.C. (10% Owner)
Reporting Person: Carlyle Holdings I L.P. (10% Owner)
Reporting Person: TC Group, LLC (10% Owner)
Reporting Person: TC Group Sub L.P. (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-13	Common Stock	M	3000000	—	Acquired	3000000	Indirect
2016-05-13	Common Stock	S	3000000	$76.61	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-13	Operating Partnership Units	$	M	3000000	Disposed		Common Stock (3000000)	Indirect

Footnotes

F1: The operating partnership units are redeemable at any time for cash or, at the election of the Issuer, exchangeable for shares of common stock on a one-for-one basis, and have no expiration date.

F2: Following the transactions reported herein, consists of (i) 3,391,412 common units held by CoreSite CRP III Holdings, LLC; (ii) 687,015 common units held by CoreSite CRP III Holdings (VCOC), LLC; (iii) 2,376,703 common units held by CoreSite CRP IV Holdings, LLC; (iv) 404,747 common units held by CoreSite CRP IV Holdings (VCOC I), LLC; (v) 1,040,295 common units held by CoreSite CRP IV Holdings (VCOC II), LLC; and (vi) 5,875,218 common units held by CoreSite CRP V Holdings, LLC.

F3: Carlyle Group Management L.L.C. is the general partner of The Carlyle Group L.P., which is a publicly traded entity listed on NASDAQ. The Carlyle Group L.P. 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 is the managing member of TC Group, L.L.C., which is the general partner of TC Group Sub L.P., which is the managing 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.

F4: Carlyle Realty III GP, L.L.C. is the general partner of Carlyle Realty III, L.P. which is the manager 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 manager 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 manager of CoreSite CRP V Holdings, LLC.