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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant to Section&nbsp;13 or 15(d)&nbsp;of</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">the Securities Exchange Act of 1934</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of Report (Date of earliest event reported):<b> May&nbsp;20, 2013</b></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">Merck&nbsp;&amp; Co.,&nbsp;Inc.</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact Name of Registrant as Specified in Its Charter)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">New Jersey</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or Other Jurisdiction of Incorporation)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1-6571</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">22-1918501</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission File Number)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(I.R.S. Employer Identification No.)</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">One Merck Drive, PO Box 100,</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Whitehouse Station, NJ</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">08889-0100</font></b></p>    </td>   </tr>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of Principal Executive Offices)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Registrant&#146;s Telephone Number,&nbsp;Including Area Code<b> (908)&nbsp;423-1000</b></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Not Applicable</font></b></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;&#160;&#160; Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425) </font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;&#160;&#160; Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12) </font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;&#160;&#160; Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b)) </font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&#160;&#160;&#160; Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c)) </font></p>
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<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item&nbsp;8.01.</font></b><font size="2" style="font-size:10.0pt;">&#160; <b>Other Events. </b></font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;20, 2013, Merck&nbsp;&amp; Co.,&nbsp;Inc. (the &#147;Company&#148;) closed an underwritten public offering of $1,000,000,000 aggregate principal amount of 0.700% Notes due 2016 (the &#147;2016 Fixed Rate Notes&#148;), $500,000,000 aggregate principal amount of Floating Rate Notes due 2016 (the &#147;2016 Floating Rate Notes&#148;), $1,000,000,000 aggregate principal amount of 1.300% Notes due 2018 (the &#147;2018 Fixed Rate Notes&#148;), $1,000,000,000 aggregate principal amount of Floating Rate Notes due 2018 (the &#147;2018 Floating Rate Notes&#148;), $1,750,000,000 aggregate principal amount of 2.800% Notes due 2023 (the &#147;2023 Notes&#148;) and $1,250,000,000 aggregate principal amount of 4.150% Notes due 2043 (the &#147;2043 Notes&#148; and, together with the 2016 Fixed Rate Notes, the 2016 Floating Rate Notes, the 2018 Fixed Rate Notes, the 2018 Floating Rate Notes and the 2023 Notes, collectively, the &#147;Notes&#148;) under the Company&#146;s Registration Statement on Form&nbsp;S-3 (Registration No.&nbsp;333-185248).</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Notes are being issued under an indenture dated as of January&nbsp;6, 2010, between the Company and U.S. Bank Trust National Association, as trustee, a copy of which was attached as Exhibit&nbsp;4.1 to the Company&#146;s Current Report on Form&nbsp;8-K previously filed with the Securities and Exchange Commission on December&nbsp;10, 2010 and is incorporated herein by reference.&#160; Copies of the officers&#146; certificate for each series of the Notes (including forms of each of the respective Notes attached thereto) pursuant to Section&nbsp;301 of the indenture governing the Notes are attached hereto as exhibits 4.1, 4.2, 4.3, 4.4, 4.5 and 4.6 and are incorporated herein by reference.&#160; The legal opinion related to these Notes is attached hereto as Exhibit&nbsp;5.1 and is incorporated herein by reference.</font></p>
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<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item&nbsp;9.01.</font></b><font size="2" style="font-size:10.0pt;">&#160; <b>Financial Statements and Exhibits.</b>  </font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)<i>&nbsp;</i>Exhibits.</font></p>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">0.700%   Notes due 2016 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2016 Fixed Rate Notes.</font></p>    </td>   </tr>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.2</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Floating   Rate Notes due 2016 Officers&#146; Certificate of the Company dated May&nbsp;20,   2013, including form of the 2016 Floating Rate Notes.</font></p>    </td>   </tr>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.3</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.300%   Notes due 2018 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2018 Fixed Rate Notes.</font></p>    </td>   </tr>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.4</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Floating   Rate Notes due 2018 Officers&#146; Certificate of the Company dated May&nbsp;20,   2013, including form of the 2018 Floating Rate Notes.</font></p>    </td>   </tr>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.5</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2.800%   Notes due 2023 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2023 Notes.</font></p>    </td>   </tr>
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<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.22%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.78%;">
<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.6</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.22%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.150%   Notes due 2043 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2043 Notes.</font></p>    </td>   </tr>
<tr>
<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.78%;">
<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.22%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.78%;">
<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.1</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.22%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion   and Consent of </font><font size="2" style="font-size:10.0pt;">Bruce N. Kuhlik</font><font size="2" style="font-size:10.0pt;">,&nbsp;Esq., Executive Vice President and General   Counsel of the Company.</font></p>    </td>   </tr>
<tr>
<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.78%;">
<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.22%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.78%;">
<p align="right" style="margin:0in .2in .0001pt 10.1pt;text-align:right;text-indent:-10.1pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.1</font></p>    </td>
<td width="92%" valign="top" style="padding:0in 0in 0in 0in;width:92.22%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent   of </font><font size="2" style="font-size:10.0pt;">Bruce N.   Kuhlik</font><font size="2" style="font-size:10.0pt;">,&nbsp;Esq., Executive Vice President and General Counsel of the   Company (contained in Exhibit&nbsp;5.1 to this Current Report on   Form&nbsp;8-K).</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2<a name="PB_2_102127_7056"></a></font></p>
<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
</div>
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<div>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><u><font size="2" face="Times New Roman" style="font-size:10.0pt;">SIGNATURES</font></u></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:24.5pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
<tr>
<td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Merck&nbsp;&amp;   Co.,&nbsp;Inc.</font></p>    </td>   </tr>
<tr>
<td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
<tr>
<td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date: May&nbsp;20, 2013 </font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.44%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
<td width="45%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:45.56%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/   Katie E. Fedosz</font></p>    </td>   </tr>
<tr>
<td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.44%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:45.56%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Katie   E. Fedosz</font></p>    </td>   </tr>
<tr>
<td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
<p style="margin:0in 0in .0001pt 10.0pt;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.44%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.56%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Senior   Assistant Secretary</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3<a name="PB_3_102318_5335"></a></font></p>
<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
</div>
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<div>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><u><font size="2" face="Times New Roman" style="font-size:10.0pt;">EXHIBIT&nbsp;INDEX</font></u></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
<tr>
<td width="12%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:12.58%;">
<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit<br>   Number</font></b></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
<td width="85%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:85.28%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.1</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">0.700%   Notes due 2016 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2016 Fixed Rate Notes.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.2</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Floating   Rate Notes due 2016 Officers&#146; Certificate of the Company dated May&nbsp;20,   2013, including form of the 2016 Floating Rate Notes.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.3</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.300%   Notes due 2018 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2018 Fixed Rate Notes.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.4</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Floating   Rate Notes due 2018 Officers&#146; Certificate of the Company dated May&nbsp;20,   2013, including form of the 2018 Floating Rate Notes.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.5</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2.800%   Notes due 2023 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2023 Notes.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.6</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.150%   Notes due 2043 Officers&#146; Certificate of the Company dated May&nbsp;20, 2013,   including form of the 2043 Notes.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.1</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion   and Consent of Bruce N. Kuhlik,&nbsp;Esq., Executive Vice President and   General Counsel of the Company.</font></p>    </td>   </tr>
<tr>
<td width="12%" valign="top" style="padding:0in 0in 0in 0in;width:12.58%;">
<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.1</font></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="padding:0in 0in 0in 0in;width:85.28%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent   of Bruce N. Kuhlik,&nbsp;Esq., Executive Vice President and General Counsel   of the Company (contained in Exhibit&nbsp;5.1 to this Current Report on   Form&nbsp;8-K).</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4<a name="PB_4_102411_5796"></a></font></p>
<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
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{"company-data": {"conformed-name": "Merck & Co. Inc.", "cik": "0000310158", "assigned-sic": "2834", "irs-number": "221918501", "state-of-incorporation": "NJ", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-06571", "film-number": "13858769"}, "business-address": {"street1": "ONE MERCK DRIVE", "street2": "P.O. BOX 100", "city": "WHITEHOUSE STATION", "state": "NJ", "zip": "08889-0100", "phone": "908-423-4840"}, "mail-address": {"street1": "ONE MERCK DRIVE", "street2": "P.O. BOX 100", "city": "WHITEHOUSE STATION", "state": "NJ", "zip": "08889-0100"}, "former-company": {"former-conformed-name": "SCHERING PLOUGH CORP", "date-changed": "19920703"}}
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of
the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):
May 20, 2013
Merck & Co., Inc.
(Exact Name of Registrant as Specified in Its Charter)
New Jersey
(State or Other Jurisdiction of Incorporation)
1-6571
22-1918501
(Commission File Number)
(I.R.S. Employer Identification No.)
One Merck Drive, PO Box 100,
Whitehouse Station, NJ
08889-0100
(Address of Principal Executive Offices)
(Zip Code)
Registrant's Telephone Number, Including Area Code
(908) 423-1000
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:
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 8.01.
Other Events.
On May 20, 2013, Merck & Co., Inc. (the "Company") closed an underwritten public offering of $1,000,000,000 aggregate principal amount of 0.700% Notes due 2016 (the "2016 Fixed Rate Notes"), $500,000,000 aggregate principal amount of Floating Rate Notes due 2016 (the "2016 Floating Rate Notes"), $1,000,000,000 aggregate principal amount of 1.300% Notes due 2018 (the "2018 Fixed Rate Notes"), $1,000,000,000 aggregate principal amount of Floating Rate Notes due 2018 (the "2018 Floating Rate Notes"), $1,750,000,000 aggregate principal amount of 2.800% Notes due 2023 (the "2023 Notes") and $1,250,000,000 aggregate principal amount of 4.150% Notes due 2043 (the "2043 Notes" and, together with the 2016 Fixed Rate Notes, the 2016 Floating Rate Notes, the 2018 Fixed Rate Notes, the 2018 Floating Rate Notes and the 2023 Notes, collectively, the "Notes") under the Company's Registration Statement on Form S-3 (Registration No. 333-185248).
The Notes are being issued under an indenture dated as of January 6, 2010, between the Company and U.S. Bank Trust National Association, as trustee, a copy of which was attached as Exhibit 4.1 to the Company's Current Report on Form 8-K previously filed with the Securities and Exchange Commission on December 10, 2010 and is incorporated herein by reference.  Copies of the officers' certificate for each series of the Notes (including forms of each of the respective Notes attached thereto) pursuant to Section 301 of the indenture governing the Notes are attached hereto as exhibits 4.1, 4.2, 4.3, 4.4, 4.5 and 4.6 and are incorporated herein by reference.  The legal opinion related to these Notes is attached hereto as Exhibit 5.1 and is incorporated herein by reference.
Item 9.01.
Financial Statements and Exhibits.
(d)
Exhibits.
4.1
0.700%   Notes due 2016 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2016 Fixed Rate Notes.
4.2
Floating   Rate Notes due 2016 Officers' Certificate of the Company dated May 20,   2013, including form of the 2016 Floating Rate Notes.
4.3
1.300%   Notes due 2018 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2018 Fixed Rate Notes.
4.4
Floating   Rate Notes due 2018 Officers' Certificate of the Company dated May 20,   2013, including form of the 2018 Floating Rate Notes.
4.5
2.800%   Notes due 2023 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2023 Notes.
4.6
4.150%   Notes due 2043 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2043 Notes.
5.1
Opinion   and Consent of
Bruce N. Kuhlik
, Esq., Executive Vice President and General   Counsel of the Company.
23.1
Consent   of
Bruce N.   Kuhlik
, Esq., Executive Vice President and General Counsel of the   Company (contained in Exhibit 5.1 to this Current Report on   Form 8-K).
2
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
Merck &   Co., Inc.
Date: May 20, 2013
By:
/s/   Katie E. Fedosz
Katie   E. Fedosz
Senior   Assistant Secretary
3
EXHIBIT INDEX
Exhibit
Number
Description
4.1
0.700%   Notes due 2016 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2016 Fixed Rate Notes.
4.2
Floating   Rate Notes due 2016 Officers' Certificate of the Company dated May 20,   2013, including form of the 2016 Floating Rate Notes.
4.3
1.300%   Notes due 2018 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2018 Fixed Rate Notes.
4.4
Floating   Rate Notes due 2018 Officers' Certificate of the Company dated May 20,   2013, including form of the 2018 Floating Rate Notes.
4.5
2.800%   Notes due 2023 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2023 Notes.
4.6
4.150%   Notes due 2043 Officers' Certificate of the Company dated May 20, 2013,   including form of the 2043 Notes.
5.1
Opinion   and Consent of Bruce N. Kuhlik, Esq., Executive Vice President and   General Counsel of the Company.
23.1
Consent   of Bruce N. Kuhlik, Esq., Executive Vice President and General Counsel   of the Company (contained in Exhibit 5.1 to this Current Report on   Form 8-K).
4