Type	Name	Date
Credit agreement	Fourth Amended and Restated Credit Agreement, among CoreSite, L.P., the subsidiary borrowers party thereto, KeyBank National Association, as administrative agent and a lender, the other lenders party thereto, Regions Bank, TD Securities (USA) LLC and Wells Fargo Securities, as co-documentation agents, RBC Capital Markets LLC, as syndication agent, and KeyBanc Capital Markets, Regions Capital Markets, RBC Capital Markets LLC, TD Securities (USA) LLC and Wells Fargo Securities, as joint lead arrangers and joint book managers	04/20/2018
Credit agreement	Third Amendment to Third Amended and Restated Credit Agreement, among CoreSite, L.P., as borrower, KeyBank National Association, as administrative agent, on behalf of itself and certain other lenders, and the other lenders party thereto	04/20/2017
Credit agreement	SECOND AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT	06/16/2016
Credit agreement	FIRST AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT	02/03/2016
Underwriting agreement	Underwriting Agreement, among the Company, CoreSite, L.P., the Selling Stockholders and Citigroup Global Markets Inc. and Jefferies LLC, as representatives of the Underwriters	11/03/2015
Underwriting agreement	Underwriting Agreement, among the Company, CoreSite, L.P., the Selling Stockholders and Jefferies LLC and Citigroup Global Markets Inc., as representatives of the Underwriters	05/01/2015
Credit agreement	First Amendment to Second Amended and Restated Credit Agreement, among CoreSite, L.P., as parent borrower, the subsidiary borrowers, KeyBank National Association, as administrative agent and a lender, and the other lenders party thereto	02/05/2014
Credit agreement	First Amendment to Second Amended and Restated Credit Agreement, among CoreSite, L.P., as parent borrower, the subsidiary borrowers, KeyBank National Association, as administrative agent and a lender, and the other lenders party thereto	02/05/2014
Underwriting agreement	Underwriting Agreement	11/10/2011

Type	Name	Date
By-Laws	Amended and Restated Bylaws of CoreSite Realty Corporation	03/09/2017

Type	Name	Date
Employment agreement	Employment Agreement between CoreSite, LLC and Jarrett Appleby	04/10/2012