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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant to Section&nbsp;13 or 15(d)&nbsp;of the Securities Exchange Act of 1934</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Date of Report (Date of earliest event reported): May&nbsp;13, 2013</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">ALEXANDRIA REAL ESTATE EQUITIES,&nbsp;INC.</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(Exact name of registrant as specified in its charter)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Maryland</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">1-12993</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">95-4502084</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(State or other   jurisdiction of<br>   incorporation)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(Commission<br>   File Number)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(I.R.S. Employer   <br>   Identification No.)</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">385 East   Colorado Boulevard, Suite&nbsp;299</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">91101</font></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Pasadena,   California</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(Address of   principal executive offices)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(Zip Code)</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Registrant&#146;s telephone number, including area code:&#160; (626) 578-0777</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">- - - - - - - - - - - - - - - - - - - -</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">N/A</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(Former name or former address, if changed since last report)</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Check the appropriate box below if the Form&nbsp;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</font></p>
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<p style="font-size:12.0pt;margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">[&#160; ]</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</p>
<p style="margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="font-size:12.0pt;margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">[&#160; ]</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</p>
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<p style="font-size:12.0pt;margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">[&#160; ]</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b))</p>
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<p style="font-size:12.0pt;margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">[&#160; ]</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Pre-commencement communications pursuant to Rule&nbsp;13e-4 (c)&nbsp;under the Exchange Act (17 CFR 240.13e-4 (c))</p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="font-size:12.0pt;margin:0in 0in .0001pt;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Item 8.01</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Other Events</b></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="font-size:12.0pt;margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">On May&nbsp;14, 2013, Alexandria Real Estate Equities,&nbsp;Inc. (the &#147;Company&#148;) entered into an underwriting agreement with Merrill Lynch, Pierce, Fenner&nbsp;&amp; Smith Incorporated, Citigroup Global Markets Inc., and J.P. Morgan Securities LLC, as representatives (the &#147;Representatives&#148;) of the several Underwriters named therein (the &#147;Underwriters&#148;), in connection with the sale of 7,590,000</font> shares of the Company&#146;s common stock, including 990,000 shares issuable pursuant to the grant of an option to purchase additional shares of the Company&#146;s common stock to the Underwriters.&#160; The shares were offered at $73.50 per share.&#160; The Representatives fully exercised the option to purchase the additional 990,000 shares of the Company&#146;s common stock.&#160; The sale of shares closed on May&nbsp;17, 2013.&#160; All shares were offered by the Company pursuant to an effective shelf registration statement on Form&nbsp;S-3 on file with the Securities and Exchange Commission.&#160; A copy of the underwriting agreement is attached hereto as Exhibit&nbsp;1.1.</p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">On May&nbsp;13, 2013, the Company issued a press release announcing the offer of its common stock.&#160; A copy of the press release is attached hereto as Exhibit&nbsp;99.1.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">On May&nbsp;14, 2013, the Company issued a press release announcing the pricing of its common stock.&#160; A copy of the press release is attached hereto as Exhibit&nbsp;99.2.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">On May&nbsp;17, 2013, the Company issued a press release announcing the closing of the public offering of 7,590,000 shares of common stock.&#160; A copy of the press release is attached hereto as Exhibit&nbsp;99.3.</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="font-size:12.0pt;margin:0in 0in .0001pt;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Item 9.01</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Financial Statements and Exhibits</b></p>
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<p style="font-size:12.0pt;margin:0in 0in .0001pt;text-indent:3.0pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">(d)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Exhibits</p>
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">1.1</font></p>    </td>
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<p style="font-size:12.0pt;margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Underwriting Agreement,   dated May&nbsp;14, 2013, between Alexandria Real Estate Equities,&nbsp;Inc. and   Merrill Lynch, Pierce, Fenner&nbsp;&amp; Smith Incorporated, </font>Citigroup Global   Markets Inc., and J.P. Morgan Securities LLC, as representatives of   the several Underwriters named therein</p>    </td>   </tr>
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">5.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Opinion of Venable LLP</font></p>    </td>   </tr>
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">8.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Tax Opinion of   Morrison&nbsp;&amp; Foerster LLP</font></p>    </td>   </tr>
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">23.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Consent of   Morrison&nbsp;&amp; Foerster LLP (included in opinion filed as   Exhibit&nbsp;8.1)</font></p>    </td>   </tr>
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
<td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.22%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.14%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.64%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">99.1</font></p>    </td>
<td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.22%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.14%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Press Release, dated   May&nbsp;13, 2013</font></p>    </td>   </tr>
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
<td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.22%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.14%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.64%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">99.2</font></p>    </td>
<td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.22%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.14%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Press Release, dated   May&nbsp;14, 2013</font></p>    </td>   </tr>
<tr>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.64%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
<td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.22%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.14%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.64%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">99.3</font></p>    </td>
<td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.22%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.14%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Press Release, dated   May&nbsp;17, 2013</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">SIGNATURES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">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:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">ALEXANDRIA REAL ESTATE   EQUITIES,&nbsp;INC.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>   </tr>
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<td width="44%" valign="top" style="padding:0in 0in 0in 0in;width:44.16%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Date:&nbsp;&nbsp; May&nbsp;17, 2013</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.94%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">By:</font></p>    </td>
<td width="26%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:26.0%;">
<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">/s/ Dean A. Shigenaga</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Dean A. Shigenaga</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">Chief Financial Officer</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="3" face="Times New Roman" style="font-size:12.0pt;">&nbsp;</font></p>
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{"company-data": {"conformed-name": "ALEXANDRIA REAL ESTATE EQUITIES INC", "cik": "0001035443", "assigned-sic": "6798", "irs-number": "954502084", "state-of-incorporation": "MD", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-12993", "film-number": "13855305"}, "business-address": {"street1": "385 E. COLORADO BLVD", "street2": "SUITE 299", "city": "PASADENA", "state": "CA", "zip": "91101", "phone": "6265780777"}, "mail-address": {"street1": "385 E. COLORADO BLVD", "street2": "SUITE 299", "city": "PASADENA", "state": "CA", "zip": "91101"}}
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): May 13, 2013
ALEXANDRIA REAL ESTATE EQUITIES, INC.
(Exact name of registrant as specified in its charter)
Maryland
1-12993
95-4502084
(State or other   jurisdiction of
incorporation)
(Commission
File Number)
(I.R.S. Employer
Identification No.)
385 East   Colorado Boulevard, Suite 299
91101
Pasadena,   California
(Address of   principal executive offices)
(Zip Code)
Registrant's telephone number, including area code:  (626) 578-0777
- - - - - - - - - - - - - - - - - - - -
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))
Item 8.01
Other Events
On May 14, 2013, Alexandria Real Estate Equities, Inc. (the "Company") entered into an underwriting agreement with Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., and J.P. Morgan Securities LLC, as representatives (the "Representatives") of the several Underwriters named therein (the "Underwriters"), in connection with the sale of 7,590,000
shares of the Company's common stock, including 990,000 shares issuable pursuant to the grant of an option to purchase additional shares of the Company's common stock to the Underwriters.  The shares were offered at $73.50 per share.  The Representatives fully exercised the option to purchase the additional 990,000 shares of the Company's common stock.  The sale of shares closed on May 17, 2013.  All shares were offered by the Company pursuant to an effective shelf registration statement on Form S-3 on file with the Securities and Exchange Commission.  A copy of the underwriting agreement is attached hereto as Exhibit 1.1.
On May 13, 2013, the Company issued a press release announcing the offer of its common stock.  A copy of the press release is attached hereto as Exhibit 99.1.
On May 14, 2013, the Company issued a press release announcing the pricing of its common stock.  A copy of the press release is attached hereto as Exhibit 99.2.
On May 17, 2013, the Company issued a press release announcing the closing of the public offering of 7,590,000 shares of common stock.  A copy of the press release is attached hereto as Exhibit 99.3.
Item 9.01
Financial Statements and Exhibits
(d)
Exhibits
1.1
Underwriting Agreement,   dated May 14, 2013, between Alexandria Real Estate Equities, Inc. and   Merrill Lynch, Pierce, Fenner & Smith Incorporated,
Citigroup Global   Markets Inc., and J.P. Morgan Securities LLC, as representatives of   the several Underwriters named therein
5.1
Opinion of Venable LLP
8.1
Tax Opinion of   Morrison & Foerster LLP
23.1
Consent of   Morrison & Foerster LLP (included in opinion filed as   Exhibit 8.1)
99.1
Press Release, dated   May 13, 2013
99.2
Press Release, dated   May 14, 2013
99.3
Press Release, dated   May 17, 2013
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.
ALEXANDRIA REAL ESTATE   EQUITIES, INC.
Date:   May 17, 2013
By:
/s/ Dean A. Shigenaga
Dean A. Shigenaga
Chief Financial Officer