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<a name="sA59AD08E7FF166C9340930B4F077847B"></a><div><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div></div><br><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">As filed with the Securities and Exchange Commission on May 8, 2015</font></div><div style="line-height:120%;text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Registration No.&#160;333-&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:100%;padding-top:4px;text-align:center;font-size:4pt;"><font style="font-family:inherit;font-size:4pt;">&#160;</font></div><div style="line-height:100%;padding-top:1px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></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;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:16pt;"><font style="font-family:inherit;font-size:16pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">WASHINGTON, DC  20549</font><font style="font-family:inherit;font-size:14pt;font-weight:bold;">&#32;</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">________________________</font></div><div style="line-height:100%;padding-top:6px;text-align:center;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;">&#160;</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;">FORM S-8</font></div><div style="line-height:120%;padding-top:8px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">REGISTRATION STATEMENT </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">UNDER</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">THE SECURITIES ACT OF 1933</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:100%;padding-top:1px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:4pt;">&#160;</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">________________________</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;">THE RUBICON PROJECT, INC.</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Exact name of registrant as specified in its charter)</font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><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="3"></td></tr><tr><td width="40%"></td><td width="33%"></td><td width="27%"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Delaware</font><font style="font-family:inherit;font-size:10pt;">&#160;<br>(State or Other Jurisdiction  <br>of Incorporation or Organization)</font></div></td><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:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">20-8881738 </font><font style="font-family:inherit;font-size:10pt;">&#160;<br>(I.R.S. Employer <br>Identification No.)</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">12181 Bluff Creek Drive, 4</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">th</sup></font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">&#32;Floor </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Los Angeles, CA 90094 </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Address of Principal Executive Offices, Zip Code)</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:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Chango Inc. Stock Option Plan</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Full title of the plans)</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Brian W. Copple </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">General Counsel </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">The Rubicon Project, Inc. </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">12181 Bluff Creek Drive, 4</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">th</sup></font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">&#32;Floor </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Los Angeles, CA 90094</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;(Name and address of agent for service)</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(310) 207-0272 </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Telephone number, including area code, of agent for service)</font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer&#8221; and &#8220;smaller reporting company&#8221; in Rule 12b-2 of the Exchange Act. </font></div><div style="line-height:120%;text-align:left;font-size:4.5pt;"><font style="font-family:inherit;font-size:4.5pt;">&#160;</font></div><div style="line-height:120%;text-align:center;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;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="4"></td></tr><tr><td width="22%"></td><td width="50%"></td><td width="25%"></td><td width="3%"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;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;">Large&#160;accelerated&#160;filer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td><td style="vertical-align:bottom;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;">Accelerated&#160;filer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</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;height:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;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;">Non-accelerated filer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#254;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;(Do not check if a smaller reporting company)</font></div></td><td style="vertical-align:bottom;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;">Smaller&#160;reporting&#160;company</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr></table></div></div><br><div></div><hr style="page-break-after:always"><a name="sA59AD08E7FF166C9340930B4F077847B"></a><div></div><br><div style="line-height:120%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"><br>CALCULATION OF REGISTRATION FEE </font></div><div style="line-height:120%;text-align:left;font-size:3pt;"><font style="font-family:inherit;font-size:3pt;">&#160;</font></div><div style="line-height:120%;text-align:center;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;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"></td></tr><tr><td width="33%"></td><td width="18%"></td><td width="14%"></td><td width="20%"></td><td width="15%"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:1px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Title&#160;of&#160;Securities&#160;to&#160;be&#160;Registered</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Amount</font></div><div style="text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">to be</font></div><div style="text-align:center;font-size:7.53pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Registered</font><font style="font-family:inherit;font-size:7.53pt;font-weight:bold;">(2)</font></div></td><td style="vertical-align:bottom;padding-left:9px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Proposed</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Maximum</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Offering Price</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Per Share</font></div></td><td style="vertical-align:bottom;padding-left:9px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Proposed</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Maximum</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Aggregate</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Offering Price</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Amount of</font></div><div style="text-align:center;padding-left:9px;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">Registration Fee</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:6px;padding-bottom:6px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:6px;text-align:left;padding-left:16px;text-indent:-16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Common Stock of The Rubicon Project, Inc. issuable upon exercise of assumed stock options under the Chango Inc. Stock Option Plan(1)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">428,798</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$4.43(3)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$1,899,575.14(3)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$220.73</font></div></td></tr></table></div></div><div style="line-height:120%;"><hr></div><div style="line-height:100%;padding-top:1px;text-align:center;font-size:4pt;"><font style="font-family:inherit;font-size:4pt;">&#160;</font></div><div style="line-height:100%;padding-top:1px;text-align:center;font-size:4pt;"><font style="font-family:inherit;font-size:4pt;">&#160;</font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:33px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:1px;"><font style="font-family:inherit;font-size:10pt;">(1)</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">In connection with the acquisition of all of the issued and outstanding shares of capital stock of Chango Inc. (&#8220;Chango&#8221;) by an indirect, wholly owned subsidiary of The Rubicon Project, Inc. (the &#8220;Registrant&#8221;), the Registrant has assumed outstanding options granted under Chango&#8217;s Stock Option Plan.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:33px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:1px;"><font style="font-family:inherit;font-size:10pt;">(2)</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In addition to the number of shares of the common stock, par value $0.00001 per share (the &#8220;Common Stock&#8221;) of the Registrant stated above, pursuant to Rule 416 under the Securities Act of 1933, as amended (the &#8220;Securities Act&#8221;), this registration statement also covers any additional shares of Common Stock</font><font style="font-family:inherit;font-size:10pt;background-color:#ffffff;">&#160;that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the Registrant&#8217;s outstanding shares of Common Stock</font><font style="font-family:inherit;font-size:10pt;">.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:33px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:1px;"><font style="font-family:inherit;font-size:10pt;">(3)</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(h) under the Securities Act, based upon the weighted-average exercise price per share of the options assumed by the Registrant.</font></div></td></tr></table><div style="line-height:120%;"><hr></div><div style="line-height:100%;padding-top:8px;text-align:center;font-size:4pt;"><font style="font-family:inherit;font-size:4pt;">&#160;</font></div><div style="line-height:100%;padding-top:1px;text-align:center;font-size:4pt;"><font style="font-family:inherit;font-size:4pt;">&#160;</font></div><br><div></div><hr style="page-break-after:always"><a name="sA59AD08E7FF166C9340930B4F077847B"></a><div></div><br><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;">PART I </font></div><div style="line-height:120%;padding-top:12px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS </font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The information required by this Part I has been omitted from this Registration Statement pursuant to the Note to Part I of Form S-8.</font></div><div style="line-height:120%;padding-top:24px;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">PART II </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;">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT </font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item&#160;3.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Incorporation of Documents by Reference.</font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The following documents filed by the Registrant with the Securities and Exchange Commission (the &#8220;Commission&#8221;), are incorporated by reference herein and shall be deemed to be a part hereof: </font></div><table cellpadding="0" cellspacing="0" style="padding-top:10px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:48px;"><font style="font-family:inherit;font-size:12pt;">1.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The Registrant&#8217;s Annual Report on Form 10-K filed with the Commission on March 6, 2015; </font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:10px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">2.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The Registrant&#8217;s Quarterly Report on Form 10-Q filed with the Commission on May 8, 2015; </font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:10px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">3.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The Registrant&#8217;s Current Reports on Form 8-K filed with the Commission on January 29, 2015, March 26, 2015, March 31, 2015 (other than with respect to Item 7.01 and the related exhibit), and April 27, 2015 (other than with respect to Item 7.01 and the related exhibit); and </font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:10px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">4.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The description of the Common Stock contained in the Registrant&#8217;s Registration Statement on Form 8-A filed with the Commission under Section&#160;12(b) of the Securities Exchange Act of 1934, as amended (the &#8220;Exchange Act&#8221;), on March 28, 2014, including any amendments or reports filed for the purpose of updating such description. </font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">In addition, all documents filed by the Registrant pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date hereof, but prior to the filing of a post-effective amendment to this Registration Statement that indicates that all securities offered hereby have been sold or that deregisters all such securities then remaining unsold, shall be deemed to be incorporated by reference in this Registration Statement and to be a part hereof from the date of filing of such documents.  Notwithstanding the foregoing, unless specifically stated to the contrary in such filing, none of the information that the Registrant discloses under Items 2.02 or 7.01 of any Current Report on Form 8-K that it may from time to time furnish to the Commission will be incorporated by reference into, or otherwise be included in or deemed to be a part of, this Registration Statement.</font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">For purposes of this Registration Statement, any document or any statement contained in a document incorporated or deemed to be incorporated herein by reference shall be deemed to be modified or superseded to the extent that a subsequently filed document or a statement contained </font></div><br><div></div><hr style="page-break-after:always"><a name="sA59AD08E7FF166C9340930B4F077847B"></a><div></div><br><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">herein or in any other subsequently filed document that also is or is deemed to be incorporated herein by reference modifies or supersedes such document or such statement in such document. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement. Subject to the foregoing, all information in this Registration Statement is so qualified in its entirety by the information appearing in the documents incorporated herein by reference.</font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item&#160;4.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Description of Securities. </font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Not applicable. </font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item&#160;5.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Interests of Named Experts and Counsel. </font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Not applicable. </font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item&#160;6.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Indemnification of Directors and Officers. </font></div></td></tr></table><div style="line-height:120%;padding-bottom:6px;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The Registrant is a Delaware corporation. Section 145 of the General Corporation Law of the State of Delaware (the &#8220;DGCL&#8221;) allows for the indemnification of officers, directors and other corporate agents in terms sufficiently broad to indemnify such persons under certain circumstances for liabilities (including reimbursement for expenses incurred) arising under the Securities Act. Article X of the Registrant&#8217;s Sixth Amended and Restated Certificate of Incorporation and Article VI of the Registrant&#8217;s Amended and Restated Bylaws authorize indemnification of the Company&#8217;s directors, officers, employees and other agents to the extent and under the circumstances permitted by the DGCL</font><font style="font-family:inherit;font-size:12pt;color:#231f20;">.</font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;background-color:#ffffff;">The Registrant&#8217;s Amended and Restated Bylaws also expressly authorize the Registrant to carry directors&#8217; and officers&#8217; insurance providing indemnification to its directors and officers for some liabilities. The Registrant maintains directors&#8217; and officers&#8217; liability insurance.</font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">In addition, the Registrant has entered into agreements to indemnify its directors and executive officers.  </font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The above discussion of the DGCL and of the Registrant&#8217;s Sixth Amended and Restated Certificate of Incorporation, Amended and Restated Bylaws, and indemnification agreements is not intended to be exhaustive and is qualified in its entirety by such statute, certificate of incorporation, bylaws and indemnification agreements. </font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item&#160;7.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Exemption from Registration Claimed. </font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Not applicable. </font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item&#160;8.</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Exhibits. </font></div></td></tr></table><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">The Exhibit Index immediately preceding the exhibits is incorporated herein by reference.</font></div><br><div></div><hr style="page-break-after:always"><a name="sA59AD08E7FF166C9340930B4F077847B"></a><div></div><br><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Item 9.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Undertakings. </font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(a) The undersigned Registrant hereby undertakes:</font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:60px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:</font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:121px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;</font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:121px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement.  Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule&#160;424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the &#8220;Calculation of Registration Fee&#8221; table in the effective registration statement; and </font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:121px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(iii)  To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement; </font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-style:italic;">provided, however, </font><font style="font-family:inherit;font-size:12pt;">that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section&#160;15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the Registration Statement; </font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:60px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial </font><font style="font-family:inherit;font-size:12pt;font-style:italic;">bona fide</font><font style="font-family:inherit;font-size:12pt;">&#32;offering thereof; and</font></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:60px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.</font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant&#8217;s annual report pursuant to Section&#160;13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan&#8217;s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial </font><font style="font-family:inherit;font-size:12pt;font-style:italic;">bona fide</font><font style="font-family:inherit;font-size:12pt;">&#32;offering thereof. </font></div><br><div></div><hr style="page-break-after:always"><a name="sA59AD08E7FF166C9340930B4F077847B"></a><div></div><br><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.</font></div><br><div></div><hr style="page-break-after:always"><a name="sA59AD08E7FF166C9340930B4F077847B"></a><div></div><br><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">SIGNATURES </font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Los Angeles, State of California, on May 8, 2015. </font></div><div style="line-height:120%;text-align:right;font-size:12pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;text-align:-moz-right;" align="right"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:54.27350427350427%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td width="27%"></td><td width="73%"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:1px;padding-right:2px;"><div style="padding-bottom:1px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">The Rubicon Project, Inc.</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;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:16px;text-indent:-16px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">By:</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">/s/ Todd Tappin</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:16px;text-indent:-16px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Name:</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Todd Tappin</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:16px;text-indent:-16px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Title:</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:12pt;"><font style="font-family:inherit;font-size:12pt;">Chief Operating Officer and Chief Financial Officer</font></div></td></tr></table></div></div><div 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cause to be done by virtue hereof. </font></div><div style="line-height:120%;padding-top:12px;text-align:left;text-indent:48px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Pursuant to the requirements of the Securities Act, the following persons have signed this Registration Statement in the capacities and on the date(s) indicated.  </font></div><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><a name="s23835E1DDF550F54A7FA30B4F097D9FA"></a><div style="line-height:120%;padding-left:1px;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:99.78632478632478%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td width="38%"></td><td width="35%"></td><td width="27%"></td></tr><tr><td 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Frankenberg</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:16px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Director</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:16px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">May 8, 2015</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;height:21px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:21px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:21px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">/s/ Robert F. Spillane</font></div></td><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: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></tr><tr><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Robert F. Spillane</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:16px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Director</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:16px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">May 8, 2015</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;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><br><div></div><hr style="page-break-after:always"><div></div><br><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">EXHIBIT INDEX</font></div><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;text-decoration:underline;">Exhibit No.</font><font style="font-family:inherit;font-size:12pt;">&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:12pt;text-decoration:underline;">Exhibit Description</font><font style="font-family:inherit;font-size:12pt;">&#32;</font></div><table cellpadding="0" cellspacing="0" style="padding-top:16px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;">4.1*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Chango Inc. Stock Option Plan.</font></div></td></tr></table><div style="line-height:120%;text-align:left;padding-left:96px;text-indent:-96px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;">5.1*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Opinion of Jonathan Feldman, Esq.</font></div></td></tr></table><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;">23.1*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Consent of Jonathan Feldman, Esq. (included in Exhibit 5.1).</font></div></td></tr></table><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;">23.2*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Consent of PricewaterhouseCoopers LLP.</font></div></td></tr></table><div style="line-height:120%;text-align:left;padding-left:96px;text-indent:-96px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:12pt;padding-left:0px;"><font style="font-family:inherit;font-size:12pt;">24.1*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">Power of Attorney (included on signature page hereto).</font></div></td></tr></table><div style="line-height:120%;text-align:left;padding-left:96px;text-indent:-96px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:96px;text-indent:-96px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:96px;text-indent:-96px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:96px;text-indent:-96px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">____________</font></div><div style="line-height:120%;padding-top:16px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">*Filed herewith.</font></div><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;padding-top:12px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;padding-top:12px;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><br><div></div>	</body>
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[{"type": "S-8", "sequence": "1", "filename": "forms-8changoplan.htm", "description": "FORM S-8", "secsgml_size_bytes": 75714}]
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FormS-8ChangoPlan
As filed with the Securities and Exchange Commission on May 8, 2015
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC  20549
________________________
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
________________________
THE RUBICON PROJECT, INC.
(Exact name of registrant as specified in its charter)
Delaware
(State or Other Jurisdiction
of Incorporation or Organization)
20-8881738
(I.R.S. Employer
Identification No.)
12181 Bluff Creek Drive, 4
th
Floor
Los Angeles, CA 90094
(Address of Principal Executive Offices, Zip Code)
Chango Inc. Stock Option Plan
(Full title of the plans)
Brian W. Copple
General Counsel
The Rubicon Project, Inc.
12181 Bluff Creek Drive, 4
th
Floor
Los Angeles, CA 90094
(Name and address of agent for service)
(310) 207-0272
(Telephone number, including area code, of agent for service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer
¨
Accelerated filer
¨
Non-accelerated filer
þ
(Do not check if a smaller reporting company)
Smaller reporting company
¨
CALCULATION OF REGISTRATION FEE
Title of Securities to be Registered
Amount
to be
Registered
(2)
Proposed
Maximum
Offering Price
Per Share
Proposed
Maximum
Aggregate
Offering Price
Amount of
Registration Fee
Common Stock of The Rubicon Project, Inc. issuable upon exercise of assumed stock options under the Chango Inc. Stock Option Plan(1)
428,798
$4.43(3)
$1,899,575.14(3)
$220.73
(1)
In connection with the acquisition of all of the issued and outstanding shares of capital stock of Chango Inc. ("Chango") by an indirect, wholly owned subsidiary of The Rubicon Project, Inc. (the "Registrant"), the Registrant has assumed outstanding options granted under Chango's Stock Option Plan.
(2)
In addition to the number of shares of the common stock, par value $0.00001 per share (the "Common Stock") of the Registrant stated above, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement also covers any additional shares of Common Stock
that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the Registrant's outstanding shares of Common Stock
.
(3)
Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(h) under the Securities Act, based upon the weighted-average exercise price per share of the options assumed by the Registrant.
PART I
INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS
The information required by this Part I has been omitted from this Registration Statement pursuant to the Note to Part I of Form S-8.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3.
Incorporation of Documents by Reference.
The following documents filed by the Registrant with the Securities and Exchange Commission (the "Commission"), are incorporated by reference herein and shall be deemed to be a part hereof:
1.
The Registrant's Annual Report on Form 10-K filed with the Commission on March 6, 2015;
2.
The Registrant's Quarterly Report on Form 10-Q filed with the Commission on May 8, 2015;
3.
The Registrant's Current Reports on Form 8-K filed with the Commission on January 29, 2015, March 26, 2015, March 31, 2015 (other than with respect to Item 7.01 and the related exhibit), and April 27, 2015 (other than with respect to Item 7.01 and the related exhibit); and
4.
The description of the Common Stock contained in the Registrant's Registration Statement on Form 8-A filed with the Commission under Section 12(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), on March 28, 2014, including any amendments or reports filed for the purpose of updating such description.
In addition, all documents filed by the Registrant pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date hereof, but prior to the filing of a post-effective amendment to this Registration Statement that indicates that all securities offered hereby have been sold or that deregisters all such securities then remaining unsold, shall be deemed to be incorporated by reference in this Registration Statement and to be a part hereof from the date of filing of such documents.  Notwithstanding the foregoing, unless specifically stated to the contrary in such filing, none of the information that the Registrant discloses under Items 2.02 or 7.01 of any Current Report on Form 8-K that it may from time to time furnish to the Commission will be incorporated by reference into, or otherwise be included in or deemed to be a part of, this Registration Statement.
For purposes of this Registration Statement, any document or any statement contained in a document incorporated or deemed to be incorporated herein by reference shall be deemed to be modified or superseded to the extent that a subsequently filed document or a statement contained
herein or in any other subsequently filed document that also is or is deemed to be incorporated herein by reference modifies or supersedes such document or such statement in such document. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement. Subject to the foregoing, all information in this Registration Statement is so qualified in its entirety by the information appearing in the documents incorporated herein by reference.
Item 4.
Description of Securities.
Not applicable.
Item 5.
Interests of Named Experts and Counsel.
Not applicable.
Item 6.
Indemnification of Directors and Officers.
The Registrant is a Delaware corporation. Section 145 of the General Corporation Law of the State of Delaware (the "DGCL") allows for the indemnification of officers, directors and other corporate agents in terms sufficiently broad to indemnify such persons under certain circumstances for liabilities (including reimbursement for expenses incurred) arising under the Securities Act. Article X of the Registrant's Sixth Amended and Restated Certificate of Incorporation and Article VI of the Registrant's Amended and Restated Bylaws authorize indemnification of the Company's directors, officers, employees and other agents to the extent and under the circumstances permitted by the DGCL
.
The Registrant's Amended and Restated Bylaws also expressly authorize the Registrant to carry directors' and officers' insurance providing indemnification to its directors and officers for some liabilities. The Registrant maintains directors' and officers' liability insurance.
In addition, the Registrant has entered into agreements to indemnify its directors and executive officers.
The above discussion of the DGCL and of the Registrant's Sixth Amended and Restated Certificate of Incorporation, Amended and Restated Bylaws, and indemnification agreements is not intended to be exhaustive and is qualified in its entirety by such statute, certificate of incorporation, bylaws and indemnification agreements.
Item 7.
Exemption from Registration Claimed.
Not applicable.
Item 8.
Exhibits.
The Exhibit Index immediately preceding the exhibits is incorporated herein by reference.
Item 9.        Undertakings.
(a) The undersigned Registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:
(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;
(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement.  Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement; and
(iii)  To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;
provided, however,
that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the Registration Statement;
(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial
bona fide
offering thereof; and
(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial
bona fide
offering thereof.
(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Los Angeles, State of California, on May 8, 2015.
The Rubicon Project, Inc.
By:
/s/ Todd Tappin
Name:
Todd Tappin
Title:
Chief Operating Officer and Chief Financial Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Frank Addante, Todd Tappin, Brian W. Copple, and Jonathan Feldman, and each of them, his or her true and lawful attorneys-in-fact and agents, each with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments, including post-effective amendments, to this Registration Statement, and any registration statement relating to the offering covered by this Registration Statement and filed pursuant to Rule 462 under the Securities Act, and to file the same, with exhibits thereto and other documents in connection therewith, with the Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that each of said attorneys-in-fact and agents or their substitute or substitutes may lawfully so or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act, the following persons have signed this Registration Statement in the capacities and on the date(s) indicated.
Signature
Title
Date
/s/ Frank Addante
Frank Addante
Chief Executive Officer and Chairman (
Principal Executive Officer
)
May 8, 2015
/s/ Gregory R. Raifman
Gregory R. Raifman
President and Director
May 8, 2015
/s/ Todd Tappin
Todd Tappin
Chief Operating Officer and Chief Financial Officer (
Principal Financial Officer
)
May 8, 2015
/s/ David Day
David Day
Chief Accounting Officer
(
Principal Accounting Officer
)
May 8, 2015
Sumant Mandal
Director
/s/ Jarl Mohn
Jarl Mohn
Director
May 8, 2015
Lisa. L. Troe
Director
/s/ Robert J. Frankenberg
Robert J. Frankenberg
Director
May 8, 2015
/s/ Robert F. Spillane
Robert F. Spillane
Director
May 8, 2015
EXHIBIT INDEX
Exhibit No.
Exhibit Description
4.1*
Chango Inc. Stock Option Plan.
5.1*
Opinion of Jonathan Feldman, Esq.
23.1*
Consent of Jonathan Feldman, Esq. (included in Exhibit 5.1).
23.2*
Consent of PricewaterhouseCoopers LLP.
24.1*
Power of Attorney (included on signature page hereto).
____________
*Filed herewith.