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<div><a name="s51ed53052790418694eb83b07a2121f3"></a></div><div style="line-height:120%;text-align:center;"><hr></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Washington, D.C. 20549</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;"><hr></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;font-weight:bold;">FORM&#160;8-K</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">CURRENT REPORT</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Pursuant to Section&#160;13 OR 15(d)&#160;of the</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">Securities Exchange Act of 1934</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Date of Report (Date of earliest event reported): </font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">May 17, 2016</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;font-weight:bold;">Mallinckrodt public limited company</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Exact name of registrant as specified in its charter)</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;"><hr></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;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:97.8515625%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:34%;"></td><td style="width:33%;"></td><td style="width:33%;"></td></tr><tr><td style="vertical-align:bottom;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;">Ireland</font></div></td><td style="vertical-align:bottom;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;">001-35803</font></div></td><td style="vertical-align:bottom;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;">98-1088325</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:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(State or other jurisdiction                   of incorporation)</font></div></td><td style="vertical-align:bottom;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;">(Commission                                     File Number)</font></div></td><td style="vertical-align:bottom;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;">(IRS Employer                   Identification No.)</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;"><hr></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br></font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Perth House, Millennium Way,</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Chesterfield, Derbyshire S41 8ND, United Kingdom </font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#32;(Address of principal executive offices)  (Zip Code)</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Registrant's telephone number, including area code:&#160;</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">&#32;+44 124 626 3051</font></div><div style="line-height:120%;text-align:center;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:left;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Check the appropriate box below if the Form&#160;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%;text-align:left;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:5%;"></td><td style="width:95%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:4px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;font-weight:bold;">o</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;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</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:6px;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:6px;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:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:4px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;font-weight:bold;">o</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;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</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:6px;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:6px;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:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:4px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;font-weight:bold;">o</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;">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:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:6px;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:6px;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:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:4px;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;font-weight:bold;">o</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;">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:120%;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 style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><hr style="page-break-after:always"><div><a name="sd09c5b8a2c514320a45df5cc8a9b043d"></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%;padding-top:11px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item 5.03&#160;&#160;&#160;&#160;Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.</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%;padding-top:11px;text-align:left;text-indent:25px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On May 17, 2016, the Board of Directors of Mallinckrodt plc (the &#8220;Company&#8221;) approved a change in the Company&#8217;s fiscal year end to the last Friday in December from the last Friday in September.  The change in fiscal year will become effective for the Company&#8217;s 2017 fiscal year, which will begin on December 31, 2016 and end on December 29, 2017.  The Company intends to file a transition report on Form 10-Q for the period from October 1, 2016 to December 30, 2016.</font></div><div style="line-height:120%;padding-top:11px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></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:left;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><hr style="page-break-after:always"><div><a name="s02e0731d4f124bbfae6b91598fda5b99"></a></div><div><br></div><div style="line-height:120%;padding-top:11px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">SIGNATURES</font></div><div style="line-height:120%;padding-top:11px;text-align:left;text-indent:25px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;padding-top:11px;text-align:left;text-indent:25px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pursuant to the requirements of Section&#160;12 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%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><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:77.5390625%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"></td></tr><tr><td style="width:7%;"></td><td style="width:20%;"></td><td style="width:10%;"></td><td style="width:14%;"></td><td style="width:49%;"></td></tr><tr><td colspan="5" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><font 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style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">MALLINCKRODT PUBLIC LIMITED COMPANY</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;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;">&#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;">&#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;">&#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;">&#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;">&#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;">&#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;">&#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;">&#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;">&#160;</font></div></td></tr><tr><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Date:</font></div></td><td style="vertical-align:middle;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;">May 18, 2016</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">By:</font></div></td><td style="vertical-align:middle;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/ Matthew K. Harbaugh</font></div></td></tr><tr><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">Matthew K. Harbaugh</font></div></td></tr><tr><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">&#160;</font></div></td><td style="vertical-align:middle;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;">Senior Vice President and Chief Financial Officer</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div 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%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div>	</body>
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SEC 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
Date of Report (Date of earliest event reported):
May 17, 2016
Mallinckrodt public limited company
(Exact name of registrant as specified in its charter)
Ireland
001-35803
98-1088325
(State or other jurisdiction                   of incorporation)
(Commission                                     File Number)
(IRS Employer                   Identification No.)
Perth House, Millennium Way,
Chesterfield, Derbyshire S41 8ND, United Kingdom
(Address of principal executive offices)  (Zip Code)
Registrant's telephone number, including area code:
+44 124 626 3051
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 5.03    Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.
On May 17, 2016, the Board of Directors of Mallinckrodt plc (the "Company") approved a change in the Company's fiscal year end to the last Friday in December from the last Friday in September.  The change in fiscal year will become effective for the Company's 2017 fiscal year, which will begin on December 31, 2016 and end on December 29, 2017.  The Company intends to file a transition report on Form 10-Q for the period from October 1, 2016 to December 30, 2016.
SIGNATURES
Pursuant to the requirements of Section 12 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.
MALLINCKRODT PUBLIC LIMITED COMPANY
Date:
May 18, 2016
By:
/s/ Matthew K. Harbaugh
Matthew K. Harbaugh
Senior Vice President and Chief Financial Officer