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<div><a name="sEDE152BF24D6769F6FDDB24AA34BFB52"></a></div><div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;padding-top:4px;text-align:center;-sec-extract:summary;font-size:13.5pt;"><font style="font-family:inherit;font-size:13.5pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:13.5pt;"><font style="font-family:inherit;font-size:13.5pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Washington, D.C. 20549</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%;padding-bottom:2px;text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;">&#160;</font></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:13.5pt;"><font style="font-family:inherit;font-size:13.5pt;font-weight:bold;">FORM 8-K</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%;padding-bottom:2px;text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;">&#160;</font></div><div style="line-height:120%;padding-top:6px;text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">CURRENT REPORT</font></div><div style="line-height:120%;text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Pursuant to Section&#160;13 OR 15(d)</font></div><div style="line-height:120%;text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">of the Securities Exchange Act of 1934</font></div><div style="line-height:120%;padding-top:6px;text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">May 30, 2018</font></div><div style="line-height:120%;text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Date of Report (Date of earliest event reported)</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%;padding-bottom:2px;text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;">&#160;</font></div><div style="line-height:120%;padding-top:6px;text-align:center;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;font-weight:bold;">THE RUBICON PROJECT, INC.</font></div><div style="line-height:120%;text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;font-weight:bold;">(Exact name of registrant as specified in its charter)</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%;padding-bottom:2px;text-align:center;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;">&#160;</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:85.38011695906432%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"></td></tr><tr><td style="width:21%;"></td><td style="width:22%;"></td><td style="width:14%;"></td><td style="width:2%;"></td><td style="width:41%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><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;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><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;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><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;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><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;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><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:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Delaware</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">001-36384</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">20-8881738</font></div></td></tr><tr><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:5px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;padding-left:5px;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">(State or other jurisdiction</font></div><div style="padding-bottom:1px;text-align:center;padding-left:5px;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">of incorporation)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:5px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;padding-left:5px;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">(Commission</font></div><div style="padding-bottom:1px;text-align:center;padding-left:5px;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">File Number)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:5px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;padding-left:5px;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">(IRS Employer</font></div><div style="padding-bottom:1px;text-align:center;padding-left:5px;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">Identification No.)</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:6px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">12181 Bluff Creek Drive, 4th 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:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">(Address of principal executive offices, including zip 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style="font-family:inherit;font-size:7.5pt;">&#160;</font></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):</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%;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:80.89668615984405%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:4%;"></td><td style="width:96%;"></td></tr><tr><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:left;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:left;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</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;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div 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style="font-family:inherit;font-size:10pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</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;">&#160;</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:97.46588693957115%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:3%;"></td><td style="width:97%;"></td></tr><tr><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:left;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:left;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</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;">&#160;</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:97.46588693957115%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:3%;"></td><td style="width:97%;"></td></tr><tr><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:left;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</font></div></td><td style="vertical-align:middle;border-bottom:1px solid #cbcbcb;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:5px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:left;padding-left:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></div></td></tr></table></div></div><div><br></div><div><div style="line-height:144%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:209%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item 8.01. Other Events.</font></div><div style="line-height:144%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As previously announced, on May 30, 2018, The Rubicon Project, Inc. (the &#8220;Company&#8221;) hosted meetings at the Craig Hallum Institutional Investor Conference in Minneapolis. The text of the PowerPoint slides used during the meetings is attached as Exhibit 99.1. In particular, the Company suggests reviewing slide 22 regarding the European General Data Protection Regulation (&#8220;GDPR&#8221;) and the discussion regarding GDPR on the Company&#8217;s Quarterly Report on Form 10-Q filed with the Securities Exchange Commission on May 3, 2018.</font></div><div style="line-height:144%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item 9.01 Financial Statements and Exhibits.</font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;"></font><font style="font-family:inherit;font-size:10pt;">(d) Exhibits</font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Exhibit Number&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Description</font></div><div style="line-height:144%;text-align:center;padding-left:144px;text-indent:-144px;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="2"></td></tr><tr><td style="width:12%;"></td><td style="width:88%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="q1investorslides991.htm"><font style="font-family:inherit;font-size:10pt;">99.1</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-left:144px;text-indent:-144px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Slide deck used during the meetings with investors at the Craig Hallum Institutional Investor Conference</font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr></table></div></div><div style="line-height:144%;text-align:left;padding-left:144px;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;&#160;&#160;&#160;</font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:144%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:209%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">SIGNATURE</font></div><div style="line-height:209%;padding-top:16px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font></div><div style="line-height:120%;padding-bottom:18px;text-align:left;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;"><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:99.02534113060429%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"></td></tr><tr><td style="width:6%;"></td><td style="width:38%;"></td><td style="width:2%;"></td><td style="width:5%;"></td><td style="width:49%;"></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:20px;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:20px;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:20px;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:20px;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:20px;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="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><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 colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;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:25px;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:25px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:25px;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:25px;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="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Date:</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">May 30, 2018</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="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">By:</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;"><div style="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Jonathan Feldman</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: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><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="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Jonathan Feldman</font></div></td></tr><tr><td colspan="3" 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><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:2px;text-align:left;padding-left:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Deputy General Counsel and Assistant Secretary</font></div></td></tr></table></div></div><div style="line-height:144%;padding-top:14px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:12px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;padding-top:14px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:144%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:144%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div>	</body>
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Document
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 OR 15(d)
of the Securities Exchange Act of 1934
May 30, 2018
Date of Report (Date of earliest event reported)
THE RUBICON PROJECT, INC.
(Exact name of registrant as specified in its charter)
Delaware
001-36384
20-8881738
(State or other jurisdiction
of incorporation)
(Commission
File Number)
(IRS Employer
Identification No.)
12181 Bluff Creek Drive, 4th Floor
Los Angeles, CA 90094
(Address of principal executive offices, including zip code)
(310) 207-0272
(Registrant's telephone number, including area code)
Not applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 8.01. Other Events.
As previously announced, on May 30, 2018, The Rubicon Project, Inc. (the "Company") hosted meetings at the Craig Hallum Institutional Investor Conference in Minneapolis. The text of the PowerPoint slides used during the meetings is attached as Exhibit 99.1. In particular, the Company suggests reviewing slide 22 regarding the European General Data Protection Regulation ("GDPR") and the discussion regarding GDPR on the Company's Quarterly Report on Form 10-Q filed with the Securities Exchange Commission on May 3, 2018.
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits
Exhibit Number        Description
99.1
Slide deck used during the meetings with investors at the Craig Hallum Institutional Investor Conference
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
THE RUBICON PROJECT, INC.
Date:
May 30, 2018
By:
/s/ Jonathan Feldman
Jonathan Feldman
Deputy General Counsel and Assistant Secretary