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<p style="text-align:center;margin-bottom:0pt;margin-top:4pt;border-bottom:Double 2.25pt;text-indent:0%;font-weight:bold;;font-size:1pt;;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:4pt;text-indent:0%;font-size:18pt;;"><font style="font-weight:bold;font-size:18pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">UNITED STATES </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:18pt;;"><font style="font-weight:bold;font-size:18pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">SECURITIES AND EXCHANGE COMMISSION </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">WASHINGTON, D.C. 20549 </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;border-bottom:Solid 1pt #000000;margin-left:40.8%;margin-right:37.59%;text-indent:0%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:18pt;;"><font style="font-weight:bold;font-size:18pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">FORM 8-K </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;border-bottom:Solid 1pt #000000;margin-left:40.8%;margin-right:37.59%;text-indent:0%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:14pt;;"><font style="font-weight:bold;font-size:14pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">CURRENT REPORT </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Pursuant to Section&#160;13 or 15(d) </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">of the Securities Exchange Act of 1934 </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-weight:bold;font-size:12pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Date of Report (Date of Earliest Event Reported): May&#160;12, 2014 </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;border-bottom:Solid 1pt #000000;margin-left:40.8%;margin-right:37.59%;text-indent:0%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:24pt;;"><font style="font-weight:bold;font-size:24pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Ultragenyx Pharmaceutical Inc. </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;;"><font style="font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Exact name of registrant as specified in its charter) </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;border-bottom:Solid 1pt #000000;margin-left:40.8%;margin-right:37.59%;text-indent:0%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p><div>
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<td valign="top"  style="width:34%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Delaware</font></p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="top"  style="width:32%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">001-36276</font></p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="top"  style="width:32%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">27-2546083</font></p></td>
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<td valign="top"  style="width:34%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(State or other jurisdiction</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><br></font><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">of incorporation)</font></p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="top"  style="width:32%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Commission</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><br></font><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">File Number)</font></p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="top"  style="width:32%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(I.R.S. Employer</font><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"><br></font><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Identification No.)</font></p></td>
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<td valign="top"  style="width:49%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">60 Leveroni Court, Novato, California</font></p></td>
<td valign="bottom"  style="width:2%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="top"  style="width:49%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">94949</font></p></td>
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<td valign="top"  style="width:49%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Address of principal executive offices)</font></p></td>
<td valign="bottom"  style="width:2%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="top"  style="width:49%;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">(Zip Code)</font></p></td>
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</table></div><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:10pt;;"><font style="font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Registrant&#8217;s telephone number, including area code: (415)&#160;483-8800 </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:10pt;;"><font style="font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Not Applicable </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;;"><font style="font-weight:bold;font-size:8pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Former name or former address, if changed since last report </font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;border-bottom:Solid 1pt #000000;margin-left:40.8%;margin-right:37.59%;text-indent:0%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:12pt;text-indent:4%;font-size:10pt;;"><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:4%;">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></p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;;">&nbsp;</p><div align="left"><table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;"><tr><td valign="top" style="width:4%;white-space:nowrap"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-size:10pt;font-family:'Wingdings'">&#168;</font></p></td><td valign="top" style="width:96%;"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Written communications pursuant to Rule&#160;425 under the Securities Act (17 CFR 230.425) </font></p></td></tr></table></div><p style="margin-bottom:0pt;margin-top:0pt;margin-left:4%;text-indent:-4%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><div align="left"><table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;"><tr><td valign="top" style="width:4%;white-space:nowrap"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-size:10pt;font-family:'Wingdings'">&#168;</font></p></td><td valign="top" style="width:96%;"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Soliciting material pursuant to Rule&#160;14a-12 under the Exchange Act (17 CFR 240.14a-12) </font></p></td></tr></table></div><p style="margin-bottom:0pt;margin-top:0pt;margin-left:4%;text-indent:-4%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><div align="left"><table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;"><tr><td valign="top" style="width:4%;white-space:nowrap"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-size:10pt;font-family:'Wingdings'">&#168;</font></p></td><td valign="top" style="width:96%;"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pre-commencement communications pursuant to Rule&#160;14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) </font></p></td></tr></table></div><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;;">&nbsp;</p><div align="left"><table border="0" cellspacing="0" cellpadding="0"  style="border-collapse:collapse; width:100%;"><tr><td valign="top" style="width:4%;white-space:nowrap"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-size:10pt;font-family:'Wingdings'">&#168;</font></p></td><td valign="top" style="width:96%;"><p style="margin-bottom:0pt;margin-top:0pt;font-family:;"><font style="font-family:'Wingdings';font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"></font><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Pre-commencement communications pursuant to Rule&#160;13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) </font></p></td></tr></table></div><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;;"><font style="font-size:6pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;border-bottom:Double 2.25pt;text-indent:0%;font-weight:bold;;font-size:1pt;;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;">&nbsp;</p>

<hr style="page-break-after:always"><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt; clear:both;text-indent:0%;font-family:;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">Item&#160;2.02.&#160;&#160;&#160;&#160;Results of Operations and Financial Condition. </font></p><p style="margin-bottom:0pt;margin-top:6pt;text-indent:4.54%;font-size:10pt;;"><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:4.54%;">On May&#160;12, 2014, Ultragenyx Pharmaceutical Inc. issued a press release announcing its financial results for the three months ended </font><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">March 31, 2014 (the &#8220;</font><font style="font-weight:bold;font-style:italic;;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;">Earnings Press Release</font><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#8221;). A copy of the Earnings Press Release is furnished herewith as Exhibit 99.1. </font></p><p style="margin-bottom:0pt;margin-top:12pt;text-indent:4.54%;font-size:10pt;;"><font style="font-style:italic;;font-size:10pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;text-indent:4.54%;">The information set forth under Item&#160;2.02 and in Exhibit&#160;99.1 shall not be deemed &#8220;filed&#8221; for purposes of Section&#160;18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as sh</font><font style="font-style:italic;;font-size:10pt;font-family:Times New Roman;font-weight:normal;text-transform:none;font-variant: normal;">all be expressly set forth by specific reference in such filing.</font><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;"> </font></p><p style="margin-bottom:0pt;margin-top:8pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;;"><font style="font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Item&#160;9.01.&#160;&#160;&#160;&#160;Financial Statements and Exhibits. </font></p><p style="margin-bottom:0pt;margin-top:6pt;text-indent:0%;font-size:10pt;;"><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">(d) Exhibits </font></p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p><div>
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<td valign="bottom"  style="width:5%; border-bottom:solid 0.75pt #000000;white-space:nowrap;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-bottom:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Exhibit<br>No.</font></p></td>
<td valign="bottom"  style="width:1%; border-bottom:solid 0.75pt transparent;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</font></p></td>
<td valign="bottom"  style="width:94%; border-bottom:solid 0.75pt #000000;white-space:nowrap;"><p style="margin-bottom:0pt;margin-top:0pt;margin-bottom:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Description</font></p></td>
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<td valign="bottom"  style="width:5%; border-top:solid 0.75pt #000000;white-space:nowrap;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">99.1</font></p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</font></p></td>
<td valign="bottom"  style="width:94%; border-top:solid 0.75pt #000000;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Earnings Press Release, dated May&#160;12, 2014</font></p></td>
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</table></div><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-size:10pt;;"><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">* * * </font></p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">- 2 -</font></p>

<hr style="page-break-after:always"><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt; clear:both;text-indent:0%;font-family:Times New Roman;font-size:10pt;"><font style="font-weight:bold;font-family:Times New Roman;font-size:10pt;font-style:normal;text-transform:none;font-variant: normal;">SIGNATURES</font></p><p style="margin-bottom:0pt;margin-top:12pt;text-indent:4.54%;font-size:10pt;;"><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:4.54%;">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-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p><div>
<table border="0" cellspacing="0" cellpadding="0" align="center" style="border-collapse:collapse; width:100%;">
<tr>
<td valign="bottom"  style="width:60%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Date: May&#160;12, 2014</font></p></td>
<td colspan="3" valign="bottom"  style="width:2%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Ultragenyx Pharmaceutical Inc.</font></p></td>
</tr>
<tr style="height:12pt;">
<td valign="middle"  style="width:60%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:12pt;;">&nbsp;</p></td>
<td valign="bottom"  style="width:2%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:12pt;;">&nbsp;</p></td>
<td colspan="2" valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;font-size:12pt;;">&nbsp;</p></td>
</tr>
<tr>
<td valign="top"  style="width:60%; border-bottom:solid 0.75pt transparent;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
<td valign="bottom"  style="width:2%; border-bottom:solid 0.75pt transparent;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">By:</font></p></td>
<td valign="bottom"  style="width:1%; border-bottom:solid 0.75pt transparent;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="bottom"  style="width:37%; border-bottom:solid 0.75pt #000000;"><p style="margin-bottom:1pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-size:10pt;;"><font style="font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">/s/ Shalini Sharp</font></p></td>
</tr>
<tr>
<td valign="top"  style="width:60%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
<td valign="bottom"  style="width:2%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="bottom"  style="width:37%; border-top:solid 0.75pt #000000;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Shalini Sharp</font></p></td>
</tr>
<tr>
<td valign="top"  style="width:60%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
<td valign="bottom"  style="width:2%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:Times New Roman;">&nbsp;</p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p></td>
<td valign="bottom"  style="width:37%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Senior Vice President, Chief Financial Officer</font></p></td>
</tr>
</table></div><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;;">&nbsp;</p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:8pt;;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;;font-size:10pt;;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">- 3 -</font></p>

<hr style="page-break-after:always"><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:10pt;;"><font style="font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Exhibit Index </font></p><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;"><font style="font-size:12pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;</font></p><div>
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<td valign="bottom"  style="width:5%; border-bottom:solid 0.75pt #000000;white-space:nowrap;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-bottom:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Exhibit<br>No.</font></p></td>
<td valign="bottom"  style="width:1%; border-bottom:solid 0.75pt transparent;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</font></p></td>
<td valign="bottom"  style="width:94%; border-bottom:solid 0.75pt #000000;white-space:nowrap;"><p style="margin-bottom:0pt;margin-top:0pt;margin-bottom:0pt;margin-bottom:0pt;margin-left:0pt;;text-indent:0pt;;font-size:8pt;;"><font style="font-size:8pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Description</font></p></td>
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<td valign="bottom"  style="width:5%; border-top:solid 0.75pt #000000;white-space:nowrap;"><p style="text-align:center;margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">99.1</font></p></td>
<td valign="bottom"  style="width:1%;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">&#160;&#160;</font></p></td>
<td valign="bottom"  style="width:94%; border-top:solid 0.75pt #000000;"><p style="margin-bottom:0pt;margin-top:0pt;margin-left:0pt;;text-indent:0pt;;font-family:;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Earnings Press Release, dated May&#160;12, 2014</font></p></td>
</tr>
</table></div><p style="margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-size:12pt;font-family:Times New Roman;">&nbsp;</p><p style="text-align:center;margin-bottom:0pt;margin-top:12pt;text-indent:0%;font-family:Times New Roman;font-size:10pt;"><font style="font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">- 4 -</font></p></body>
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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 12, 2014
Ultragenyx Pharmaceutical Inc.
(Exact name of registrant as specified in its charter)
Delaware
001-36276
27-2546083
(State or other jurisdiction
of incorporation)
(Commission
File Number)
(I.R.S. Employer
Identification No.)
60 Leveroni Court, Novato, California
94949
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including area code: (415) 483-8800
Not Applicable
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 2.02.    Results of Operations and Financial Condition.
On May 12, 2014, Ultragenyx Pharmaceutical Inc. issued a press release announcing its financial results for the three months ended
March 31, 2014 (the "
Earnings Press Release
"). A copy of the Earnings Press Release is furnished herewith as Exhibit 99.1.
The information set forth under Item 2.02 and in Exhibit 99.1 shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as sh
all be expressly set forth by specific reference in such filing.
Item 9.01.    Financial Statements and Exhibits.
(d) Exhibits
Exhibit
No.
Description
99.1
Earnings Press Release, dated May 12, 2014
* * *
- 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.
Date: May 12, 2014
Ultragenyx Pharmaceutical Inc.
By:
/s/ Shalini Sharp
Shalini Sharp
Senior Vice President, Chief Financial Officer
- 3 -
Exhibit Index
Exhibit
No.
Description
99.1
Earnings Press Release, dated May 12, 2014
- 4 -