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<div><a name="s8d668b58763e4d7189aec0818ccc0cd4"></a></div><div><div style="line-height:120%;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:center;font-size:13pt;"><font style="font-family:inherit;font-size:13pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:13pt;"><font style="font-family:inherit;font-size:13pt;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%;padding-top:13px;text-align:center;font-size:13pt;"><font style="font-family:inherit;font-size:13pt;font-weight:bold;">FORM 8-K</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;">April 27, 2020</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%;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:7pt;"><font style="font-family:inherit;font-size:7pt;font-weight:bold;">(Exact name of registrant as specified in its charter)</font></div><div style="line-height:174%;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:85.546875%;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:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;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:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;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:2px;border-left:1px solid #cbcbcb;border-right:1px solid #cbcbcb;border-top:1px solid #cbcbcb;"><div style="text-align:center;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: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="padding-top:2px;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:2px;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: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="padding-top:2px;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:2px;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: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="padding-top:2px;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:2px;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:28px;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 code)</font></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;">(310) 207-0272</font></div><div style="line-height:232%;text-align:center;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">(Registrant&#8217;s telephone number, including area code)</font></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;">Not applicable</font></div><div style="line-height:120%;text-align:center;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;font-weight:bold;">(Former name or former address, if changed since last report)</font></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:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></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: </font></div><div style="line-height:120%;padding-bottom:28px;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:97.4609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:4%;"></td><td style="width:79%;"></td><td style="width:17%;"></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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</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="text-align:left;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><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></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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</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="text-align:left;font-size:10pt;"><font 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><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></tr><tr><td style="vertical-align:middle;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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</font></div></td><td colspan="2" style="vertical-align:middle;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;"><div style="text-align:left;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><tr><td style="vertical-align:middle;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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#9744;</font></div></td><td colspan="2" style="vertical-align:middle;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;"><div style="text-align:left;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 style="line-height:174%;padding-top:21px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;padding-bottom:18px;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Securities registered pursuant to Section 12(b) of the Act:</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 style="width:31%;"></td><td style="width:3%;"></td><td style="width:25%;"></td><td style="width:3%;"></td><td style="width:38%;"></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:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Title of each class</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;border-bottom:1px solid #000000;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;">Trading Symbol(s)</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;border-bottom:1px solid #000000;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;">Name of each exchange on which registered</font></div></td></tr><tr><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:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Common Stock</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;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">RUBI</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;border-top:1px solid #000000;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">NYSE</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167; 230.405 of this chapter) or Rule&#160;12b-2&#160;of the Securities Exchange Act of 1934 (&#167;&#160;240.12b-2&#160;of this chapter).</font></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Emerging growth company&#160;&#160;&#9744;</font></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&#160;13(a) of the Exchange Act.&#160;&#160;&#9744;</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><a name="s100cc2811b074916afd4fdddea5a10ce"></a></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;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:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;padding-bottom:13px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item 8.01.  &#160;&#160;&#160;&#160;Other Events.</font></div><div style="line-height:120%;padding-bottom:13px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Rubicon Project, Inc. (the &#8220;Company&#8221;) will hold its annual meeting of stockholders (the &#8220;2020 Annual Meeting&#8221;) on July 8, 2020, at 12:00 p.m., Pacific Time, in virtual format.  </font></div><div style="line-height:120%;padding-bottom:13px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Because the date of the 2020 Annual Meeting has been changed by more than 30 days from the anniversary of the Company&#8217;s 2019 annual meeting of stockholders, the deadline for the submission of proposals by stockholders for inclusion in the Company&#8217;s proxy materials relating to the 2020 Annual Meeting in accordance with Rule 14a-8 under the Securities Exchange Act of 1934, as amended, will be the close of business on May 12, 2020, which the Company believes is a reasonable time before it expects to begin to print and send its proxy materials. Any proposal received after such date will be considered untimely.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><a name="sa82bd7efa3ba4d3e9ddec86bde98df33"></a></div><div><div style="line-height:120%;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:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">SIGNATURE</font></div><div style="line-height:120%;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:46px;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:96.6796875%;border-collapse:collapse;text-align:left;"><tr><td colspan="4"></td></tr><tr><td style="width:7%;"></td><td style="width:40%;"></td><td style="width:6%;"></td><td style="width:47%;"></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></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 colspan="2" 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;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 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="text-align:left;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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">April 27, 2020</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;">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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Aaron Saltz</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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Aaron Saltz </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="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">General Counsel and Corporate Secretary</font></div></td></tr></table></div></div><div style="line-height:232%;padding-top:21px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></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
April 27, 2020
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:
☐
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))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common Stock
RUBI
NYSE
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).
Emerging growth company  ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐
Item 8.01.      Other Events.
The Rubicon Project, Inc. (the "Company") will hold its annual meeting of stockholders (the "2020 Annual Meeting") on July 8, 2020, at 12:00 p.m., Pacific Time, in virtual format.
Because the date of the 2020 Annual Meeting has been changed by more than 30 days from the anniversary of the Company's 2019 annual meeting of stockholders, the deadline for the submission of proposals by stockholders for inclusion in the Company's proxy materials relating to the 2020 Annual Meeting in accordance with Rule 14a-8 under the Securities Exchange Act of 1934, as amended, will be the close of business on May 12, 2020, which the Company believes is a reasonable time before it expects to begin to print and send its proxy materials. Any proposal received after such date will be considered untimely.
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:
April 27, 2020
By:
/s/ Aaron Saltz
Aaron Saltz
General Counsel and Corporate Secretary