<SEC-DOCUMENT>0001719755-18-000003.txt : 20180214
<SEC-HEADER>0001719755-18-000003.hdr.sgml : 20180214
<ACCEPTANCE-DATETIME>20180213201042
ACCESSION NUMBER:		0001719755-18-000003
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180214
DATE AS OF CHANGE:		20180213

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Spero Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001701108
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90168
		FILM NUMBER:		18606459

	BUSINESS ADDRESS:	
		STREET 1:		675 MASSACHUSETTS AVENUE
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		857-242-1600

	MAIL ADDRESS:	
		STREET 1:		675 MASSACHUSETTS AVENUE
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Spero Therapeutics, LLC
		DATE OF NAME CHANGE:	20170316

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GV 2015, L.P.
		CENTRAL INDEX KEY:			0001719755
		IRS NUMBER:				472144612
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		1600 AMPHITHEATRE PARKWAY
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043
		BUSINESS PHONE:		650-335-5278

	MAIL ADDRESS:	
		STREET 1:		1600 AMPHITHEATRE PARKWAY
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>a2018schedule13g-spero.htm
<DESCRIPTION>SC 13G
<TEXT>
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<div><a name="sB1FB72CD4EDE00CB663C7BD713B07488"></a></div><div></div><div><br></div><div style="line-height:120%;text-align:center;"><hr></div><div style="line-height:120%;text-align:center;"><hr></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Washington, D.C. 20549</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:16pt;"><font style="font-family:inherit;font-size:16pt;font-weight:bold;">SCHEDULE 13G</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">Under the Securities Exchange Act of 1934</font></div><div style="line-height:120%;text-align:center;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;font-weight:bold;">(Amendment No. )*</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:16pt;"><font style="font-family:inherit;font-size:16pt;font-weight:bold;">Spero Therapeutics, Inc.</font></div><div style="line-height:120%;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(Name of Issuer)</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Common Stock</font></div><div style="line-height:120%;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(Title&#160;of Class of Securities)</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">84833T103</font></div><div style="line-height:120%;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(CUSIP Number)</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">December&#160;31, 2017</font></div><div style="line-height:120%;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(Date of Event Which Requires Filing of this Statement)</font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">Check the appropriate box to designate the rule pursuant to which this Schedule&#160;is filed:</font></div><div style="line-height:120%;padding-top:16px;text-align:left;padding-left:12px;font-size:11pt;"><font style="font-family:Wingdings;font-size:9pt;">&#168;</font><font style="font-family:Arial;font-size:11pt;">&#32;&#160;&#160;&#160;&#160;Rule&#160;13d-1(b)</font></div><div style="line-height:120%;padding-top:16px;text-align:left;padding-left:12px;font-size:11pt;"><font style="font-family:Wingdings;font-size:9pt;">&#168;</font><font style="font-family:Arial;font-size:11pt;">&#32;&#160;&#160;&#160;&#160;Rule&#160;13d-1(c)</font></div><div style="line-height:120%;padding-top:16px;text-align:justify;padding-left:12px;font-size:11pt;"><font style="font-family:Wingdings;font-size:9pt;">&#253;</font><font style="font-family:Arial;font-size:11pt;">&#32;&#160;&#160;&#160;&#160;Rule&#160;13d-1(d)</font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:48px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:11pt;padding-left:12px;"><font style="font-family:inherit;font-size:11pt;">*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">The remainder of this cover page shall be filled out for a reporting person&#8217;s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.</font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;">The information required in the remainder of this cover page shall not be deemed to be &#8220;filed&#8221; for the purpose of Section&#160;18 of the Securities Exchange Act of 1934 (&#8220;Act&#8221;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).</font></div><div style="line-height:120%;text-align:center;"><hr></div><div style="line-height:120%;text-align:center;"><hr></div><div><br></div><div></div><hr style="page-break-after:always"><div><a name="s006D78634AA18547BABB7BD714037969"></a></div><div></div><div><br></div><div style="line-height:120%;padding-left:0px;text-indent:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"></td></tr><tr><td style="width:11%;"></td><td style="width:10%;"></td><td style="width:4%;"></td><td style="width:11%;"></td><td style="width:28%;"></td><td style="width:21%;"></td><td style="width:15%;"></td></tr><tr><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:center;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">CUSIP No. 84833T103</font></div></td><td colspan="3" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">13G</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NAME OF REPORTING PERSONS <br>GV 2015, L.P.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</font></div><div style="text-align:right;padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">x</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SEC USE ONLY</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CITIZENSHIP OR PLACE OF ORGANIZATION <br>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Delaware</font></div></td></tr><tr><td colspan="2" rowspan="4" style="vertical-align:middle;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE VOTING POWER</font></div><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED VOTING POWER <br>See response to row 5.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE DISPOSITIVE POWER <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED DISPOSITIVE POWER <br>See response to row 7.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,112,473</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div></td><td style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7.7% </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(3)</sup></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">12</font></div></td><td colspan="5" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TYPE OF REPORTING PERSON</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">PN</font></div></td></tr></table></div></div><div style="line-height:120%;padding-left:9px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (1)</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to vote these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (2) </sup></font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to dispose of these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(3) </sup></font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Based on</font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;">14,369,182 </font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">shares of the Issuer&#8217;s Common Stock outstanding as of November 30, 2017 as disclosed in the Issuer&#8217;s Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on December 14, 2017.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">2</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;padding-left:0px;text-indent:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"></td></tr><tr><td style="width:11%;"></td><td style="width:10%;"></td><td style="width:4%;"></td><td style="width:11%;"></td><td style="width:28%;"></td><td style="width:21%;"></td><td style="width:15%;"></td></tr><tr><td colspan="4" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:center;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">CUSIP No. 84833T103</font></div></td><td colspan="3" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">13G</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NAME OF REPORTING PERSONS <br>GV 2015 GP, L.L.C.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</font></div><div style="text-align:right;padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">x</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SEC USE ONLY</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CITIZENSHIP OR PLACE OF ORGANIZATION <br>Delaware</font></div></td></tr><tr><td colspan="2" rowspan="4" style="vertical-align:middle;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE VOTING POWER <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED VOTING POWER <br>See response to row 5.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE DISPOSITIVE POWER.&#160;&#160; <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED DISPOSITIVE POWER <br>See response to row 7.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,112,473</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div></td><td style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7.7% </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(3)</sup></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">12</font></div></td><td colspan="5" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TYPE OF REPORTING PERSON</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">OO</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to vote these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (2) </sup></font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to dispose of these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (3)</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Based on</font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;">14,369,182 </font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">shares of the Issuer&#8217;s Common Stock outstanding as of November 30, 2017 as disclosed in the Issuer&#8217;s Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on December 14, 2017.</font><font style="font-family:inherit;font-size:10pt;">&#32;</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">3</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"></td></tr><tr><td style="width:11%;"></td><td style="width:10%;"></td><td style="width:4%;"></td><td style="width:11%;"></td><td style="width:28%;"></td><td style="width:21%;"></td><td style="width:15%;"></td></tr><tr><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:center;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">CUSIP No. 84833T103</font></div></td><td colspan="3" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">13G</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NAME OF REPORTING PERSONS <br> Alphabet Holdings LLC</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</font></div><div style="text-align:right;padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">x</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SEC USE ONLY</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CITIZENSHIP OR PLACE OF ORGANIZATION <br>Delaware</font></div></td></tr><tr><td colspan="2" rowspan="4" style="vertical-align:middle;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE VOTING POWER <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED VOTING POWER <br>See response to row 5.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE DISPOSITIVE POWER.&#160;&#160; <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED DISPOSITIVE POWER <br>See response to row 7.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,112,473</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div></td><td style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7.7%</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">&#160;(3)</sup></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">12</font></div></td><td colspan="5" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TYPE OF REPORTING PERSON</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">OO</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to vote these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (2) </sup></font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to dispose of these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(3)</sup></font><font style="font-family:inherit;font-size:10pt;color:#222222;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Based on</font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;">14,369,182 </font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">shares of the Issuer&#8217;s Common Stock outstanding as of November 30, 2017 as disclosed in the Issuer&#8217;s Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on December 14, 2017.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">4</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"></td></tr><tr><td style="width:11%;"></td><td style="width:10%;"></td><td style="width:4%;"></td><td style="width:11%;"></td><td style="width:28%;"></td><td style="width:21%;"></td><td style="width:15%;"></td></tr><tr><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:center;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">CUSIP No. 84833T103</font></div></td><td colspan="3" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">13G</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NAME OF REPORTING PERSONS <br> XXVI Holdings Inc.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</font></div><div style="text-align:right;padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">x</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SEC USE ONLY</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CITIZENSHIP OR PLACE OF ORGANIZATION <br>Delaware</font></div></td></tr><tr><td colspan="2" rowspan="4" style="vertical-align:middle;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE VOTING POWER <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED VOTING POWER <br>See response to row 5.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE DISPOSITIVE POWER.&#160;&#160; <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED DISPOSITIVE POWER <br>See response to row 7.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,112,473</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div></td><td style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7.7%</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">&#160;(3)</sup></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">12</font></div></td><td colspan="5" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TYPE OF REPORTING PERSON</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CO</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to vote these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (2) </sup></font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to dispose of these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(3)</sup></font><font style="font-family:inherit;font-size:10pt;color:#222222;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Based on</font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;">14,369,182 </font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">shares of the Issuer&#8217;s Common Stock outstanding as of November 30, 2017 as disclosed in the Issuer&#8217;s Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on December 14, 2017.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">5</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;padding-left:0px;text-indent:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"></td></tr><tr><td style="width:11%;"></td><td style="width:10%;"></td><td style="width:4%;"></td><td style="width:10%;"></td><td style="width:27%;"></td><td style="width:21%;"></td><td style="width:17%;"></td></tr><tr><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:center;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">CUSIP No. 84833T103</font></div></td><td colspan="3" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">13G</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NAME OF REPORTING PERSONS <br> Alphabet Inc.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></td><td colspan="6" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</font></div><div style="text-align:right;padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;(b)&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:Wingdings;font-size:10pt;">x</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;&#160;&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SEC USE ONLY</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4</font></div></td><td colspan="6" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CITIZENSHIP OR PLACE OF ORGANIZATION <br>Delaware</font></div></td></tr><tr><td colspan="2" rowspan="4" style="vertical-align:middle;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE VOTING POWER <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED VOTING POWER <br>See response to row 5.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></td><td colspan="4" style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SOLE DISPOSITIVE POWER.&#160;&#160; <br>1,112,473 </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(2)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8</font></div></td><td colspan="4" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">SHARED DISPOSITIVE POWER <br>See response to row 7.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1,112,473</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font></div></td><td colspan="5" style="vertical-align:top;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</font></div></td><td style="vertical-align:top;padding-left:8px;padding-top:2px;padding-bottom:2px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;padding-top:8px;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7.7%</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">&#160;(3)</sup></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">12</font></div></td><td colspan="5" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-left:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">TYPE OF REPORTING PERSON</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:8px;padding-bottom:8px;padding-right:8px;border-right:1px solid #000000;border-top:1px solid #000000;"><div style="padding-bottom:8px;text-align:left;padding-left:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CO</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to vote these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> (2) </sup></font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Consists of 1,112,473 shares of the Issuer&#8217;s Common Stock held directly by GV 2015, L.P.  GV 2015 GP, L.L.C. (the general partner of GV 2015, L.P.), Alphabet Holdings LLC (the sole member of GV 2015 GP, L.L.C.), XXVI Holdings Inc. (the managing member of Alphabet Holdings LLC), and Alphabet Inc. (the sole stockholder of XXVI Holdings Inc.) may each be deemed to have sole power to dispose of these shares.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#222222;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(3)</sup></font><font style="font-family:inherit;font-size:10pt;color:#222222;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">Based on</font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;">14,369,182 </font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">shares of the Issuer&#8217;s Common Stock outstanding as of November 30, 2017 as disclosed in the Issuer&#8217;s Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on December 14, 2017.</font><font style="font-family:inherit;font-size:10pt;">&#32;</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">6</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;padding-left:0px;font-size:12pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:15%;"></td><td style="width:85%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 1(A).</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">NAME OF ISSUER:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Spero Therapeutics, Inc.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 1(B).</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">ADDRESS OF ISSUER&#8217;S PRINCIPAL EXECUTIVE OFFICES:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">675 Massachusetts Avenue, 14th Floor</font></div><div style="padding-bottom:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Cambridge, Massachusetts 02139</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 2(A).</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">NAME OF PERSONS FILING:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">This statement is filed by the following individuals, collectively referred to as the &#8220;Reporting Persons&#8221;:</font></div><div style="padding-bottom:13px;padding-left:48px;text-indent:-24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#8226;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;GV 2015, L.P., a Delaware limited partnership (the &#8220;Fund&#8221;)</font></div><div style="padding-bottom:13px;padding-left:48px;text-indent:-24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#8226;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;GV 2015 GP, L.L.C., a Delaware limited liability company (the &#8220;General Partner&#8221;)</font></div><div style="padding-bottom:13px;padding-left:48px;text-indent:-24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#8226;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;Alphabet Holdings LLC, a Delaware limited liability company (&#8220;Alphabet Holdings&#8221;)</font></div><div style="padding-bottom:13px;padding-left:48px;text-indent:-24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#8226;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;XXVI Holdings Inc., a Delaware corporation (&#8220;XXVI Holdings&#8221;), and </font></div><div style="padding-bottom:13px;padding-left:48px;text-indent:-24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#8226;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;Alphabet Inc., a Delaware corporation (&#8220;Alphabet&#8221;)</font></div><div style="padding-bottom:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Each of the General Partner, Alphabet Holdings (the sole member of the General Partner), XXVI Holdings (the managing member of Alphabet Holdings), and Alphabet (the sole stockholder of XXVI Holdings) may be deemed to have sole power to vote or sole power to dispose of the securities owned directly by the Fund. </font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 2(B).</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The address of the principal business office for each of the Reporting Persons is:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">1600 Amphitheatre Parkway</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Mountain View, CA&#160;&#160;94043</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 2(C)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">CITIZENSHIP:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">GV 2015, L.P. is a Delaware limited partnership, GV 2015 GP, L.L.C. is a Delaware limited liability company, Alphabet Holdings LLC is a Delaware limited liability company, XXVI Holdings Inc. is a Delaware corporation, and Alphabet Inc. is a Delaware corporation.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 2(D)/(E)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">TITLE OF CLASS OF SECURITIES AND CUSIP NUMBER:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Common Stock</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">CUSIP # 84833T103</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 3.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not Applicable.</font></div></td></tr></table></div></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">7</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;padding-left:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:15%;"></td><td style="width:85%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 4.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:13px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">OWNERSHIP:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.</font></div><div style="text-align:left;padding-left:96px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Amount beneficially owned</font><font style="font-family:inherit;font-size:10pt;">:  <br>See Row 9 of cover page for each Reporting Person.</font></div><div style="text-align:left;padding-left:96px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(b)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Percent of Class</font><font style="font-family:inherit;font-size:10pt;">: <br>See Row 11 of cover page for each Reporting Person.</font></div><div style="text-align:left;text-indent:96px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(c)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Number of shares as to which such person has</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(i)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Sole power to vote or to direct the vote</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">See Row 5 of cover page for each Reporting Person.</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(ii)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Shared power to vote or to direct the vote</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">See Row 6 of cover page for each Reporting Person.</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(iii)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Sole power to dispose or to direct the disposition of</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">See Row 7 of cover page for each Reporting Person.</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(iv)&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Shared power to dispose or to direct the disposition of</font><font style="font-family:inherit;font-size:10pt;">:</font></div><div style="text-align:left;text-indent:144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">See Row 8 of cover page for each Reporting Person.</font></div></td></tr></table></div></div><div style="line-height:232%;text-align:justify;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:15%;"></td><td style="width:85%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 5.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not Applicable.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 6.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Under certain circumstances set forth in the limited partnership agreement of GV 2015, L.P. and the limited liability company agreement of GV 2015 GP, L.L.C., the general and limited partners or members, as the case may be, of each of such entities may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the issuer owned by each such entity of which they are a general partner, limited partner, or member.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 7.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not Applicable.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 8.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not Applicable.</font></div></td></tr></table></div></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">8</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:232%;text-align:justify;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:15%;"></td><td style="width:85%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 9.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">NOTICE OF DISSOLUTION OF GROUP:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:16px;padding-right:6px;"><div style="padding-bottom:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not Applicable.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:6px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ITEM 10.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:6px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">CERTIFICATION:</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:6px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not Applicable.</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;Page </font><font style="font-family:inherit;font-size:10pt;">9</font></div></div><hr style="page-break-after:always"><div></div><div><br></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">SIGNATURES</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;padding-left:96px;text-indent:-96px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.</font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Date: 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Chang</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Name:&#160;&#160;&#160;&#160;Daphne M. 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