<SEC-DOCUMENT>0000950170-24-011269.txt : 20240205
<SEC-HEADER>0000950170-24-011269.hdr.sgml : 20240205
<ACCEPTANCE-DATETIME>20240205162904
ACCESSION NUMBER:		0000950170-24-011269
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		12
CONFORMED PERIOD OF REPORT:	20240201
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
FILED AS OF DATE:		20240205
DATE AS OF CHANGE:		20240205

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Alkermes plc.
		CENTRAL INDEX KEY:			0001520262
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				981007018
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35299
		FILM NUMBER:		24596108

	BUSINESS ADDRESS:	
		STREET 1:		CONNAUGHT HOUSE
		STREET 2:		1 BURLINGTON ROAD
		CITY:			DUBLIN 4
		STATE:			L2
		ZIP:			00000
		BUSINESS PHONE:		00-353-1-772-8000

	MAIL ADDRESS:	
		STREET 1:		CONNAUGHT HOUSE
		STREET 2:		1 BURLINGTON ROAD
		CITY:			DUBLIN 4
		STATE:			L2
		ZIP:			00000

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ANTLER SCIENCE TWO PLC
		DATE OF NAME CHANGE:	20110804

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Antler Science Two Ltd
		DATE OF NAME CHANGE:	20110509
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>alks-20240201.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version='1.0' encoding='ASCII'?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:nonNumeric="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:alks="http://www.alkermes.com/20240201" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2022-02-16" xmlns:utr="http://www.xbrl.org/2009/utr">
 <head>
  <title>8-K</title>
  <meta http-equiv="Content-Type" content="text/html"/>
 </head>
 <body style="margin: auto!important;padding: 8px;">
  <div style="display:none;"><ix:header><ix:hidden><ix:nonNumeric id="F_577521d1-2217-45fa-93ea-c3afa8d021c0" name="dei:AmendmentFlag" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" format="ixt:fixed-false">False</ix:nonNumeric><ix:nonNumeric id="F_5536faf8-7d1b-4a1d-a913-374d721fdd66" name="dei:EntityCentralIndexKey" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537">0001520262</ix:nonNumeric><ix:nonNumeric id="F_be576984-374b-4559-95fc-0000d1f0ce95" name="dei:EntityRegistrantName" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537">Alkermes plc.</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:type="simple" xlink:href="alks-20240201.xsd"/></ix:references><ix:resources><xbrli:context id="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001520262</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2024-02-01</xbrli:startDate><xbrli:endDate>2024-02-01</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div>
  <div style="margin-top:48.0px;"></div>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:11pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="border-top:2.25pt double;padding-top:1pt;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">UNITED STATES</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">SECURITIES AND EXCHANGE COMMISSION</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Washington, D.C. 20549</span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">FORM </span><span style="font-size:18pt;font-family:Times New Roman;"><ix:nonNumeric id="F_26d707f5-b29d-41b1-a186-b9d31bea07ad" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:DocumentType"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">8-K</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">CURRENT REPORT<br/>PURSUANT TO SECTION 13 OR 15(d) OF THE</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">SECURITIES EXCHANGE ACT OF 1934</span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Date of Report (Date of earliest event reported): </span><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_02b55d89-1950-49f6-a953-eb51315cc199" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:DocumentPeriodEndDate" format="ixt:date-monthname-day-year-en"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">February 1, 2024</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="font-size:18pt;font-family:Times New Roman;"><span style="-sec-ix-hidden:F_be576984-374b-4559-95fc-0000d1f0ce95;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">ALKERMES PUBLIC LIMITED COMPANY</span></span></span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">(Exact name of registrant as specified in its charter)</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="margin-left:auto;border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;margin-right:auto;">
   <tr style="visibility:collapse;">
    <td style="width:28.205%;"/>
    <td style="width:1.303%;"/>
    <td style="width:13.301%;"/>
    <td style="width:16.175%;"/>
    <td style="width:10.256%;"/>
    <td style="width:1.303%;"/>
    <td style="width:29.455%;"/>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_5a2a3f4d-2037-4f23-82fe-179c55745dd4" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityIncorporationStateCountryCode" format="ixt-sec:edgarprovcountryen"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Ireland</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_d303adad-e7ab-4ea8-86cd-facc2026d4d6" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityFileNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">001-35299</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_70e56c24-73df-47a8-b02d-3ca7b1c12496" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityTaxIdentificationNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">98-1007018</span></ix:nonNumeric></span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(State or other jurisdiction</span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(Commission</span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(IRS Employer</span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">of incorporation)</span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">File Number)</span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Identification No.)</span></p></td>
   </tr>
   <tr style="background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td colspan="3" style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td colspan="3" style="background-color:#ffffff;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td colspan="7" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_2640fdce-333e-486c-9c8d-97fdd0728240" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityAddressAddressLine1"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Connaught House</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">, </span><span><ix:nonNumeric id="F_3ba12109-c17f-4e16-bb22-b26c23563aec" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityAddressAddressLine2"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">1 Burlington Road</span></ix:nonNumeric></span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td colspan="7" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_73e33a1f-60d9-4701-a943-0b280955ba9c" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityAddressCityOrTown"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Dublin 4</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">, </span><span><ix:nonNumeric id="F_272882e1-b9fb-4b8b-934e-070218b8ab2f" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityAddressCountry" format="ixt-sec:countrynameen"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Ireland</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;"> </span><span><ix:nonNumeric id="F_cdc23b21-5e0f-4941-bad0-a04878179b37" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityAddressPostalZipCode"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">D04 C5Y6</span></ix:nonNumeric></span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td colspan="7" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(Address of principal executive offices)</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Registrant's telephone number, including area code: + </span><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_d28c2a25-cbe6-41aa-9725-31d9648ed60b" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:CityAreaCode"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">353</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">-</span><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_f6e167ca-2eb4-4ff0-b321-d0ac06085436" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:LocalPhoneNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">1-772-8000</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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 (</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">see </span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">General Instruction A.2. below):</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:2.56%;"/>
    <td style="width:1.28%;"/>
    <td style="width:96.16%;"/>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_cf397201-25a0-42a3-bc58-e4f42077ce2c" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:WrittenCommunications" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</span></p></td>
   </tr>
   <tr style="white-space:pre-wrap;word-break:break-word;">
    <td style="background-color:#ffffff;vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_c2ae488e-da20-4ded-92f1-591474d4fc18" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:SolicitingMaterial" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</span></p></td>
   </tr>
   <tr style="white-space:pre-wrap;word-break:break-word;">
    <td style="background-color:#ffffff;vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_197ee4e9-76a3-44ae-aa30-c5117c1f5541" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:PreCommencementTenderOffer" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</span></p></td>
   </tr>
   <tr style="white-space:pre-wrap;word-break:break-word;">
    <td style="background-color:#ffffff;vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:6pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;background-color:#ffffff;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_3461d2e5-1981-4591-a661-f13e668c366f" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:PreCommencementIssuerTenderOffer" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:1pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:6pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Securities registered pursuant to Section 12(b) of the Act:</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:33.08%;"/>
    <td style="width:2.82%;"/>
    <td style="width:19.74%;"/>
    <td style="width:2.82%;"/>
    <td style="width:41.54%;"/>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Title of each class</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid #ffffff03;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Trading Symbol(s)</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid #ffffff03;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Name of each exchange on which registered</span></p></td>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;text-align:left;">
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span><ix:nonNumeric id="F_f022c7c1-535e-4660-84d7-857a8e764473" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:Security12bTitle"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Ordinary shares, $0.01 par value</span></ix:nonNumeric></span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span><ix:nonNumeric id="F_40d33c5d-24a8-4326-a520-cdb8df6f4383" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:TradingSymbol"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">ALKS</span></ix:nonNumeric></span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:2.2pt;text-align:center;"><span><ix:nonNumeric id="F_8f76e85e-ff47-4d49-b820-04b13579390a" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Nasdaq Global Select Market</span></ix:nonNumeric></span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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 12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:33.333%;"/>
    <td style="width:33.333%;"/>
    <td style="width:33.333%;"/>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;">
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;text-align:center;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:right;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Emerging growth company  </span><span style="font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_65a590bf-14a6-462d-b526-477262341fe4" contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537" name="dei:EntityEmergingGrowthCompany" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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. </span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:'Segoe UI Symbol',sans-serif;min-width:fit-content;">&#9744;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:11pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <div style="margin-top:48.0px;"></div>
  <hr style="page-break-after:always;"/>
  <div style="margin-top:48.0px;"></div>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:11pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">      On February 1, 2024, the board of directors of Alkermes plc (the &#8220;Company&#8221;) designated Blair C. Jackson, Executive Vice President, Chief Operating Officer of Alkermes, Inc., a wholly-owned subsidiary of the Company, as the Company&#8217;s interim principal financial officer and Samuel J. Parisi, Vice President, Finance of Alkermes, Inc., as the Company&#8217;s interim principal accounting officer, in each case while Iain M. Brown, the Company&#8217;s principal financial officer and principal accounting officer, is on a medical leave of absence and until such time as Mr. Brown is able to resume his positions as principal financial officer and principal accounting officer.</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span><span style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">      Mr. Jackson, age 51, has served as Executive Vice President, Chief Operating Officer since January 2021, with responsibility for the Company&#8217;s global operations, quality, finance, information technology and corporate planning functions. Prior to that, Mr. Jackson served as Senior Vice President, Corporate Planning from July 2018 to January 2021, as Senior Vice President, Business Development from May 2016 to July 2018, and prior to that, in various scientific and corporate roles within the Company. Mr. Jackson received a Bachelor of Arts in Biochemistry from the University of Calgary, a Bachelor of Arts in Chemical Engineering and a Master of Business Administration from the University of Alberta, and a Master of Science in Chemical Engineering from the Massachusetts Institute of Technology. Mr. Jackson will remain entitled to indemnification under his existing agreements with the Company and Alkermes, Inc., and has not otherwise entered into any material plan, contract, arrangement or amendment in connection with this interim appointment.</span></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">      Mr. Parisi, age 49, has served as Vice President, Finance since July 2020. Prior to that, Mr. Parisi served as Senior Director of Financial Reporting and Compliance from January 2016 to July 2020, and prior to that, in various roles within the finance organization since 2007. Prior to joining Alkermes, Mr. Parisi served as a Certified Public Accountant in the audit practices of UHY LLP from 2005 to 2007 and at KPMG LLP from 1996 to 2004. Mr. Parisi received a Bachelor of Science in Business Administration from the University of Massachusetts Lowell and was formerly a Certified Public Accountant. In connection with this interim appointment, Mr. Parisi is entitled to enter into a deed of indemnification with the Company in substantially the form filed as Exhibit 10.1 to the Company&#8217;s Quarterly Report on Form 10-Q for the period ended March 31, 2020. Mr. Parisi has not otherwise entered into any material plan, contract, arrangement or amendment in connection with this interim appointment.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">      There is no family relationship between either Mr. Jackson or Mr. Parisi and any director, executive officer, or person nominated or chosen by the Company to become a director or executive officer and neither Mr. Jackson or Mr. Parisi has a direct or indirect material interest in any transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:8pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:11pt;font-family:Times New Roman;min-width:fit-content;">2</span></p>
  <div style="margin-top:48.0px;"></div>
  <hr style="page-break-after:always;"/>
  <div style="margin-top:48.0px;"></div>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:11pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;" id="signature"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">SIGNA</span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">TURE</span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="margin-left:auto;border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;margin-right:auto;">
   <tr style="visibility:collapse;">
    <td style="width:52%;"/>
    <td style="width:3.88%;"/>
    <td style="width:1.8%;"/>
    <td style="width:42.32%;"/>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">ALKERMES PLC</span></p></td>
   </tr>
   <tr style="white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td colspan="3" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Date: February 5, 2024</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">By:</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;border-bottom:0.5pt solid;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ David J. Gaffin</span></p></td>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">David J. Gaffin</span></p></td>
   </tr>
   <tr style="height:10pt;white-space:pre-wrap;word-break:break-word;">
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Secretary</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:11pt;font-family:Times New Roman;min-width:fit-content;">3</span></p>
  <div style="margin-top:48.0px;"></div>
  <hr style="page-break-after:always;"/>
 </body>
</html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>2
<FILENAME>alks-20240201.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2024-02-05T16:27:47.8058+00:00 -->
<!-- Copyright (c) 2024 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema targetNamespace="http://www.alkermes.com/20240201" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:alks="http://www.alkermes.com/20240201" xmlns:xlink="http://www.w3.org/1999/xlink">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance"/>
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase"/>
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" namespace="http://xbrl.sec.gov/dei/2023"/>
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" namespace="http://fasb.org/us-gaap/2023"/>
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbase id="lnk">
        <link:roleRef roleURI="http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation" xlink:href="alks-20240201.xsd#Role_DocumentDocumentAndEntityInformation" xlink:type="simple"/>
        <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:title="labelLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="dei_PreCommencementIssuerTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:label="dei_SolicitingMaterial"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:label="dei_WrittenCommunications"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:label="dei_PreCommencementTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine2" xlink:label="dei_EntityAddressAddressLine2"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCountry" xlink:label="dei_EntityAddressCountry"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-commencement Issuer Tender Offer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-commencement Issuer Tender Offer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SolicitingMaterial_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SolicitingMaterial_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Soliciting Material</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_WrittenCommunications_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_WrittenCommunications_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Written Communications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-commencement Tender Offer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-commencement Tender Offer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Country</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCountry_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Country</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCountry" xlink:to="dei_EntityAddressCountry_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
        </link:labelLink>
        <link:presentationLink xlink:role="http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine2" xlink:label="dei_EntityAddressAddressLine2"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCountry" xlink:label="dei_EntityAddressCountry"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:label="dei_WrittenCommunications"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:label="dei_SolicitingMaterial"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:label="dei_PreCommencementTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="dei_PreCommencementIssuerTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType" order="49.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag" order="50.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate" order="51.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="52.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey" order="53.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany" order="54.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber" order="55.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="56.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber" order="57.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1" order="58.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine2" order="59.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown" order="60.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCountry" order="61.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode" order="62.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="63.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber" order="64.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_WrittenCommunications" order="65.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SolicitingMaterial" order="66.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="67.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementIssuerTenderOffer" order="68.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="69.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol" order="70.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName" order="71.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
      </link:linkbase>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>3
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.24.0.1</span><table class="report" border="0" cellspacing="2" id="idm140447439776704">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
<th class="th"><div>Feb. 01, 2024</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Feb.  01,  2024<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Alkermes plc.<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001520262<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-35299<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">L2<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">98-1007018<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">Connaught House<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine2', window );">Entity Address, Address Line Two</a></td>
<td class="text">1 Burlington Road<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Dublin 4<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCountry', window );">Entity Address, Country</a></td>
<td class="text">IE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">D04 C5Y6<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">353<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">1-772-8000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Ordinary shares, $0.01 par value<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">ALKS<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine2">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 2 such as Street or Suite number</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine2</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCountry">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>ISO 3166-1 alpha-2 country code.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCountry</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:countryCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>5
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
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M=]W3CHG&K=!X#;[Q3X?#KHG&J]!TZVDF)_VN:Z3I%FA"1N/K>A(5M>5 TR
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M!Z.:60F]A%9JGZJ'-#ZH'C(*!?&Y'C[E>G@*-Y;&O%"N@GL!_]':-\*K^(+
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MU4#E/]O4#6CV#30<D05>,9FV-J/D3@H\W/[O#;#"Q([A[8N_ 5!+ P04
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M:%0*CMQC)8QQ8K3^-8+)#^Q^ %!+ P04    " "A@T58'#AEZC\!   \ @
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M>::W=Y-[2:AU[D&P]_ :C1W-CQ^W_ %02P,$%     @ H8-%6"0>FZ*M
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M8U!R;W!S+V%P<"YX;6Q02P$"% ,4    " "A@T58!YP:H.\    K @  $0
M            @ &O    9&]C4')O<',O8V]R92YX;6Q02P$"% ,4    " "A
M@T58F5R<(Q &  "<)P  $P              @ '- 0  >&PO=&AE;64O=&AE
M;64Q+GAM;%!+ 0(4 Q0    ( *&#15@B^Y0/8P0  "@1   8
M  " @0X(  !X;"]W;W)K<VAE971S+W-H965T,2YX;6Q02P$"% ,4    " "A
M@T58GZ ;\+$"  #B#   #0              @ &G#   >&PO<W1Y;&5S+GAM
M;%!+ 0(4 Q0    ( *&#15B7BKL<P    !,"   +              "  8,/
M  !?<F5L<R\N<F5L<U!+ 0(4 Q0    ( *&#15@<.&7J/P$  #P"   /
M          "  6P0  !X;"]W;W)K8F]O:RYX;6Q02P$"% ,4    " "A@T58
M)!Z;HJT   #X 0  &@              @ '8$0  >&PO7W)E;',O=V]R:V)O
M;VLN>&UL+G)E;'-02P$"% ,4    " "A@T5899!YDAD!  #/ P  $P
M        @ &]$@  6T-O;G1E;G1?5'EP97-=+GAM;%!+!08     "0 ) #X"
(   '%      !

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>6
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
..report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

..report table.authRefData a {
	display: block;
	font-weight: bold;
}

..report table.authRefData p {
	margin-top: 0px;
}

..report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

..report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

..report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

..report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
..pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
..report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

..report hr {
	border: 1px solid #acf;
}

/* Top labels */
..report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

..report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

..report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

..report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

..report td.pl div.a {
	width: 200px;
}

..report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
..report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
..report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
..report .re, .report .reu {
	background-color: #def;
}

..report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
..report .ro, .report .rou {
	background-color: white;
}

..report .rou td {
	border-bottom: 1px solid black;
}

..report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
..report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
..report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

..report .nump {
	padding-left: 2em;
}

..report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
..report .text {
	text-align: left;
	white-space: normal;
}

..report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

..report .text .more {
	display: none;
}

..report .text .note {
	font-style: italic;
	font-weight: bold;
}

..report .text .small {
	width: 10em;
}

..report sup {
	font-style: italic;
}

..report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>23</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="alks-20240201.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="8-K" isOnlyDei="true" isUsgaap="true" original="alks-20240201.htm">alks-20240201.htm</File>
    <File>alks-20240201.xsd</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="23">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>12
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "alks-20240201.htm": {
   "nsprefix": "alks",
   "nsuri": "http://www.alkermes.com/20240201",
   "dts": {
    "inline": {
     "local": [
      "alks-20240201.htm"
     ]
    },
    "schema": {
     "local": [
      "alks-20240201.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://www.xbrl.org/dtr/type/2022-03-31/types.xsd",
      "https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd",
      "https://xbrl.fasb.org/srt/2023/elts/srt-roles-2023.xsd",
      "https://xbrl.fasb.org/srt/2023/elts/srt-types-2023.xsd",
      "https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd",
      "https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd",
      "https://xbrl.fasb.org/us-gaap/2023/elts/us-types-2023.xsd",
      "https://xbrl.sec.gov/country/2023/country-2023.xsd",
      "https://xbrl.sec.gov/dei/2023/dei-2023.xsd"
     ]
    }
   },
   "keyStandard": 23,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 3,
    "http://xbrl.sec.gov/dei/2023": 3
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 24,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2023": 23
   },
   "report": {
    "R1": {
     "role": "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation",
     "longName": "100000 - Document - Document and Entity Information",
     "shortName": "Document and Entity Information",
     "isDefault": "true",
     "groupType": "document",
     "subGroupType": "",
     "menuCat": "Cover",
     "order": "1",
     "firstAnchor": {
      "contextRef": "C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "alks-20240201.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "alks-20240201.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag",
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission."
       }
      }
     },
     "auth_ref": []
    },
    "dei_CityAreaCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "CityAreaCode",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "City Area Code",
        "terseLabel": "City Area Code",
        "documentation": "Area code of city"
       }
      }
     },
     "auth_ref": []
    },
    "dei_CoverAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "CoverAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Cover [Abstract]",
        "terseLabel": "Cover",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date",
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentType": {
     "xbrltype": "submissionTypeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "DocumentType",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Type",
        "terseLabel": "Document Type",
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine1": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressAddressLine1",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line One",
        "verboseLabel": "Entity Address, Address Line One",
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine2": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressAddressLine2",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line Two",
        "verboseLabel": "Entity Address, Address Line Two",
        "documentation": "Address Line 2 such as Street or Suite number"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressCityOrTown": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressCityOrTown",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town",
        "documentation": "Name of the City or Town"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressCountry": {
     "xbrltype": "countryCodeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressCountry",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Country",
        "terseLabel": "Entity Address, Country",
        "documentation": "ISO 3166-1 alpha-2 country code."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressPostalZipCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressPostalZipCode",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code",
        "documentation": "Code for the postal or zip code"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityCentralIndexKey": {
     "xbrltype": "centralIndexKeyItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key",
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityEmergingGrowthCompany": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityEmergingGrowthCompany",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company",
        "documentation": "Indicate if registrant meets the emerging growth company criteria."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityFileNumber": {
     "xbrltype": "fileNumberItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityFileNumber",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Securities Act File Number",
        "terseLabel": "Entity File Number",
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityIncorporationStateCountryCode": {
     "xbrltype": "edgarStateCountryItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityIncorporationStateCountryCode",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code",
        "documentation": "Two-character EDGAR code representing the state or country of incorporation."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityRegistrantName": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name",
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityTaxIdentificationNumber": {
     "xbrltype": "employerIdItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityTaxIdentificationNumber",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number",
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_LocalPhoneNumber": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "LocalPhoneNumber",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number",
        "documentation": "Local phone number for entity."
       }
      }
     },
     "auth_ref": []
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "PreCommencementIssuerTenderOffer",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre-commencement Issuer Tender Offer",
        "terseLabel": "Pre-commencement Issuer Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "dei_PreCommencementTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "PreCommencementTenderOffer",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre-commencement Tender Offer",
        "terseLabel": "Pre-commencement Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "dei_Security12bTitle": {
     "xbrltype": "securityTitleItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "Security12bTitle",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Title of 12(b) Security",
        "terseLabel": "Title of 12(b) Security",
        "documentation": "Title of a 12(b) registered security."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "dei_SecurityExchangeName": {
     "xbrltype": "edgarExchangeCodeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "SecurityExchangeName",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name",
        "documentation": "Name of the Exchange on which a security is registered."
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "dei_SolicitingMaterial": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "SolicitingMaterial",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Soliciting Material",
        "terseLabel": "Soliciting Material",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r5"
     ]
    },
    "dei_TradingSymbol": {
     "xbrltype": "tradingSymbolItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "TradingSymbol",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol",
        "documentation": "Trading symbol of an instrument as listed on an exchange."
       }
      }
     },
     "auth_ref": []
    },
    "dei_WrittenCommunications": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "WrittenCommunications",
     "presentation": [
      "http://www.alkermes.com/20240201/taxonomy/role/Role_DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Written Communications",
        "terseLabel": "Written Communications",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act."
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    }
   }
  }
 },
 "std_ref": {
  "r0": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r2": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r3": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r4": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Section": "14a",
   "Number": "240",
   "Subsection": "12"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Securities Act",
   "Number": "230",
   "Section": "425"
  }
 }
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>13
<FILENAME>0000950170-24-011269-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0000950170-24-011269-xbrl.zip
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MFZ-BA7I]D?6EQP2?>]8'NV<9=ND]I=L\AVP2&G) >B_,T7O=1<V#,V286@T
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MNV1QVE/1J.KNB*C>'-5;U?5V91]'L0>7< FN*>W#C(6\?(O++2:(- :)D!,
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M*X=,MTI0?\]2>;9*[E'T<?4ZS5">N!+ UR/2]3.^?@Y+IKD4SZT?<,7I+.4
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=,C Q+GAS9%!+!08      @ " 'X   "''P     !

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>alks-20240201_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2023"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="alks-20240201.xsd" xlink:type="simple"/>
    <context id="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001520262</identifier>
        </entity>
        <period>
            <startDate>2024-02-01</startDate>
            <endDate>2024-02-01</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_577521d1-2217-45fa-93ea-c3afa8d021c0">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_5536faf8-7d1b-4a1d-a913-374d721fdd66">0001520262</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_be576984-374b-4559-95fc-0000d1f0ce95">Alkermes plc.</dei:EntityRegistrantName>
    <dei:DocumentType
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_26d707f5-b29d-41b1-a186-b9d31bea07ad">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_02b55d89-1950-49f6-a953-eb51315cc199">2024-02-01</dei:DocumentPeriodEndDate>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_5a2a3f4d-2037-4f23-82fe-179c55745dd4">L2</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_d303adad-e7ab-4ea8-86cd-facc2026d4d6">001-35299</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_70e56c24-73df-47a8-b02d-3ca7b1c12496">98-1007018</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_2640fdce-333e-486c-9c8d-97fdd0728240">Connaught House</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_3ba12109-c17f-4e16-bb22-b26c23563aec">1 Burlington Road</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_73e33a1f-60d9-4701-a943-0b280955ba9c">Dublin 4</dei:EntityAddressCityOrTown>
    <dei:EntityAddressCountry
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_272882e1-b9fb-4b8b-934e-070218b8ab2f">IE</dei:EntityAddressCountry>
    <dei:EntityAddressPostalZipCode
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_cdc23b21-5e0f-4941-bad0-a04878179b37">D04 C5Y6</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_d28c2a25-cbe6-41aa-9725-31d9648ed60b">353</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_f6e167ca-2eb4-4ff0-b321-d0ac06085436">1-772-8000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_cf397201-25a0-42a3-bc58-e4f42077ce2c">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_c2ae488e-da20-4ded-92f1-591474d4fc18">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_197ee4e9-76a3-44ae-aa30-c5117c1f5541">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_3461d2e5-1981-4591-a661-f13e668c366f">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_f022c7c1-535e-4660-84d7-857a8e764473">Ordinary shares, $0.01 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_40d33c5d-24a8-4326-a520-cdb8df6f4383">ALKS</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_8f76e85e-ff47-4d49-b820-04b13579390a">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_a9e43cd5-8fbd-4cca-b9a2-b557f46b8537"
      id="F_65a590bf-14a6-462d-b526-477262341fe4">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
