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			cor_Current_Folio_8K
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:18pt;">UNITED STATES</font>
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:18pt;">SECURITIES AND EXCHANGE COMMISSION</font>
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			<font style="display:inline;font-weight:bold;color:#000000;">Washington, D.C. 20549</font>
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:18pt;">FORM 8-K</font>
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:12pt;">CURRENT REPORT</font>
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:12pt;">Pursuant to Section&nbsp;13 OR 15(d) of The</font>
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:12pt;">Securities Exchange Act of 1934</font>
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			<font style="display:inline;">&nbsp;</font>
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			<font style="display:inline;font-weight:bold;color:#000000;">Date of Report (Date of earliest event reported): July 24, 2019</font>
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			<font style="display:inline;font-weight:bold;color:#000000;font-size:18pt;">CoreSite Realty Corporation</font>
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		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">(Exact name of registrant as specified in its charter)</font>
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			<font style="display:inline;">&nbsp;</font>
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					<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">Maryland</font></p>
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					<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">001-34877</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">27-1925611</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">(State or other jurisdiction</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">(Commission</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">(IRS Employer</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">of incorporation)</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">File Number)</font></p>
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						<font style="display:inline;font-weight:bold;color:#000000;">Identification No.)</font></p>
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						<font style="display:inline;">&nbsp;</font></p>
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						<font style="display:inline;">&nbsp;</font></p>
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						<font style="display:inline;">&nbsp;</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">1001 17th Street, Suite 500</font></p>
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						<font style="display:inline;">&nbsp;</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">Denver, CO</font></p>
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					<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">80202</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">(Address of principal executive offices)</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">(Zip Code)</font></p>
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		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
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		<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">Registrant's telephone number, including area code: (866)&nbsp;777-2673</font>
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			<font style="display:inline;">&nbsp;</font>
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		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">N/A</font>
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		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">(Former name or former address, if changed since last report.)</font>
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		<div style="margin-bottom:6pt;"><hr style="border-width:0;width:25%;height:1pt;color:#000;background-color:#000;" align="center"></hr></div>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</font>
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		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&#xF020;</font>
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		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">&#x25FB;</font><font style="display:inline;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font style="display:inline;color:#000000;">Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</font>
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		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">&#x25FB;</font><font style="display:inline;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font style="display:inline;color:#000000;">Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</font>
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		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">&#x25FB;</font><font style="display:inline;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font style="display:inline;color:#000000;">Pre-commencement communications pursuant to Rule&nbsp;14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font>
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		<p style="margin:0pt 0pt 6pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">&#x25FB;</font><font style="display:inline;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font style="display:inline;color:#000000;">Pre-commencement communications pursuant to Rule&nbsp;13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font>
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		<p style="margin:0pt 0pt 1.5pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">Securities registered pursuant to Section 12(b) of the Act:</font>
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						<font style="display:inline;font-size:1pt;">&nbsp;</font></p>
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					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;height:1.00pt;overflow:hidden;font-size:0pt;">
						<font style="display:inline;font-size:1pt;">&nbsp;</font></p>
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					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;height:1.00pt;overflow:hidden;font-size:0pt;">
						<font style="display:inline;font-size:1pt;">&nbsp;</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;text-decoration:underline;">Title of Each Class</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;text-decoration:underline;">Trading Symbol</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;text-decoration:underline;">Name of each exchange on which registered</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">Common Stock, $0.01 par value per share</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">COR</font></p>
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					<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">New York Stock Exchange</font></p>
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		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.</font>
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		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">Emerging growth company &#x25FB;</font>
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		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&#xF020;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. &#x25FB;</font>
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		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;border-top:1pt solid #000000 ;border-bottom:3pt solid #000000 ;line-height:1pt;text-align:center;font-family:Times New Roman,Times,serif;font-size: 1pt;">
			<font style="display:inline;font-size:1pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			&nbsp;
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;"></font></p></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;">
		<p><font size="1"> </font></p><div style="width:100%">

		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">

			&nbsp;

		</p>

</div></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;page-break-after:always;"><div style="background-color:#000000;clear:both;height:2pt;border:0;margin:30pt 0pt 30pt 0pt;"></div></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;"></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;"><p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;"><font style="display:inline;"></font>
		</p>
		<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">Section&nbsp;2 &#x2014; Financial Information</font>
		</p>
		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">Item&nbsp;2.02 Results of Operations and Financial Condition.</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">On July 24, 2019, CoreSite Realty Corporation ("CoreSite") issued a press release reporting financial results and operating information for the quarter ended June 30, 2019. In addition, CoreSite made available on its website supplemental operating and financial data for the same period. The text of the press release and the supplemental information package are furnished herewith as Exhibits 99.1 and 99.2, respectively.</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">The information in this report, including Exhibits 99.1 and 99.2 attached hereto, shall not be deemed to be "filed" for purposes of Section&nbsp;18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;text-align:center;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">Section&nbsp;9 &#x2014; Financial Statements and Exhibits</font>
		</p>
		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">Item&nbsp;9.01 Financial Statements and Exhibits.</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">(d)&nbsp;The following exhibits are furnished with this Current Report on Form 8-K.</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 100.00%;line-height:100%;margin-bottom:0pt;">
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:08.10%;border-bottom:1pt solid #000000 ;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 8pt;">
						<font style="display:inline;font-weight:bold;color:#000000;font-size:8pt;">Exhibit&nbsp;No.</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:02.44%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 8pt;">
						<font style="display:inline;font-size:8pt;">&nbsp;&nbsp;&nbsp;&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:89.46%;border-bottom:1pt solid #000000 ;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 8pt;">
						<font style="display:inline;font-weight:bold;color:#000000;font-size:8pt;">Description</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:08.10%;border-top:1pt solid #000000 ;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:02.44%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:89.46%;border-top:1pt solid #000000 ;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:08.10%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">99.1</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:02.44%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:89.46%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<a href="ex-99d1.htm"><font style="display:inline;">Press Release, dated July 24, 2019.</font></a></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:08.10%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:02.44%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:89.46%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;width:08.10%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">99.2</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;width:02.44%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;width:89.46%;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<a href="ex-99d2.htm"><font style="display:inline;">Quarter Ended June 30, 2019, Earnings Release and Supplemental Information, dated July&nbsp;24, 2019.</font></a></p>
				</td>
			</tr>
		</table></div>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;color:#000000;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;"></font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;"></font></p></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;">
		<p><font size="1"> </font></p><div style="width:100%">

		<p style="margin:24pt 0pt 0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">

			<font style="display:inline;">2</font>

		</p>

</div></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;page-break-after:always;"><div style="background-color:#000000;clear:both;height:2pt;border:0;margin:30pt 0pt 30pt 0pt;"></div></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;"></div><div style="margin-left:10.2941176470588%;margin-right:10.2941176470588%;"><p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;"><font style="display:inline;"></font>
		</p>
		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;font-weight:bold;color:#000000;">SIGNATURES<a name="_313671"></a></font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;color:#000000;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font>
		</p>
		<p style="margin:0pt;text-align:center;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
			<font style="display:inline;">&nbsp;</font>
		</p>
		<div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 100.00%;line-height:100%;margin-bottom:0pt;">
			<tr>
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					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td colspan="2" valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:239.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;color:#000000;">CORESITE REALTY CORPORATION</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:246.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
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				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:14.85pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:224.30pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:246.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:14.85pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:224.30pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:246.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">Date: July 24, 2019</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:14.85pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">By:</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:224.30pt;border-bottom:1pt solid #000000 ;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;font-weight:bold;">/s/ Jeffrey S. Finnin</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:246.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:14.85pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:224.30pt;border-top:1pt solid #000000 ;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">Name:</font><font style="display:inline;">&nbsp;</font><font style="display:inline;font-weight:bold;color:#000000;">Jeffrey S. Finnin</font></p>
				</td>
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			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:246.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
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				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:14.85pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
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				<td valign="top" style="border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;width:224.30pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;color:#000000;">Title:&nbsp;&nbsp;&nbsp;</font><font style="display:inline;font-weight:bold;color:#000000;">Chief Financial Officer</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;width:246.15pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
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				<td valign="top" style="border-right:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-top:1pt none #D9D9D9 ;width:14.85pt;padding:0pt;">
					<p style="margin:0pt;line-height:100%;font-family:Times New Roman,Times,serif;font-size: 10pt;">
						<font style="display:inline;">&nbsp;</font></p>
				</td>
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						<font style="display:inline;font-weight:bold;">/s/ Mark&nbsp;R. Jones</font></p>
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						<font style="display:inline;font-weight:bold;">Name:&nbsp;Mark&nbsp;R. &nbsp;Jones</font></p>
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						<font style="display:inline;color:#000000;">Title:&nbsp;&nbsp;&nbsp;</font><font style="display:inline;font-weight:bold;color:#000000;">Chief Accounting Officer</font></p>
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{"company-data": {"conformed-name": "CoreSite Realty Corp", "cik": "0001490892", "assigned-sic": "6798", "irs-number": "000000000", "state-of-incorporation": "MD", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-34877", "film-number": "19971483"}, "business-address": {"street1": "1001 17TH STREET", "street2": "SUITE 500", "city": "DENVER", "state": "CO", "zip": "80202", "phone": "(866) 777-2673"}, "mail-address": {"street1": "1001 17TH STREET", "street2": "SUITE 500", "city": "DENVER", "state": "CO", "zip": "80202"}}
cor_Current_Folio_8K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 OR 15(d) of The
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): July 24, 2019
CoreSite Realty Corporation
(Exact name of registrant as specified in its charter)
Maryland
001-34877
27-1925611
(State or other jurisdiction
(Commission
(IRS Employer
of incorporation)
File Number)
Identification No.)
1001 17th Street, Suite 500
Denver, CO
80202
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including area code: (866) 777-2673
N/A
(Former name or former address, if changed since last report.)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

◻
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
◻
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
◻
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
◻
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of Each Class
Trading Symbol
Name of each exchange on which registered
Common Stock, $0.01 par value per share
COR
New York Stock Exchange
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.
Emerging growth company ◻

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻
Section 2 — Financial Information
Item 2.02 Results of Operations and Financial Condition.
On July 24, 2019, CoreSite Realty Corporation ("CoreSite") issued a press release reporting financial results and operating information for the quarter ended June 30, 2019. In addition, CoreSite made available on its website supplemental operating and financial data for the same period. The text of the press release and the supplemental information package are furnished herewith as Exhibits 99.1 and 99.2, respectively.
The information in this report, including Exhibits 99.1 and 99.2 attached hereto, shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.
Section 9 — Financial Statements and Exhibits
Item 9.01 Financial Statements and Exhibits.
(d) The following exhibits are furnished with this Current Report on Form 8-K.
Exhibit No.
Description
99.1
Press Release, dated July 24, 2019.
99.2
Quarter Ended June 30, 2019, Earnings Release and Supplemental Information, dated July 24, 2019.
2
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
CORESITE REALTY CORPORATION
Date: July 24, 2019
By:
/s/ Jeffrey S. Finnin
Name:
Jeffrey S. Finnin
Title:
Chief Financial Officer
By:
/s/ Mark R. Jones
Name: Mark R.  Jones
Title:
Chief Accounting Officer
3