    <SEC-DOCUMENT>0001104659-26-087650-index.html : 20260729
    <SEC-HEADER>0001104659-26-087650.hdr.sgml : 20260729
    <ACCEPTANCE-DATETIME>20260728181406
    ACCESSION NUMBER:		0001104659-26-087650
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		20
    CONFORMED PERIOD OF REPORT:	20260915
    FILED AS OF DATE:		20260729
    DATE AS OF CHANGE:		20260728

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Replimune Group, Inc.
    		CENTRAL INDEX KEY:			0001737953
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		ORGANIZATION NAME:           	03 Life Sciences
    		EIN:				822082553
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			0331

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38596
    		FILM NUMBER:		261213192

    	BUSINESS ADDRESS:
    		STREET 1:		500 UNICORN PARK
    		CITY:			WOBURN
    		STATE:			MA
    		ZIP:			01801
    		BUSINESS PHONE:		(781) 222-9600

    	MAIL ADDRESS:
    		STREET 1:		500 UNICORN PARK
    		CITY:			WOBURN
    		STATE:			MA
    		ZIP:			01801
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>tm263608-4_def14a.htm
    <DESCRIPTION>FORM -DEF 14A
    <TEXT>
    Document 1 - file: tm263608-4_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>2
    <FILENAME>repl-20260331.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 2 - file: repl-20260331.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>3
    <FILENAME>repl-20260331_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
    <TEXT>
    Document 3 - file: repl-20260331_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>repl-20260331_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 4 - file: repl-20260331_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>repl-20260331_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 5 - file: repl-20260331_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>bc_capvsnetloss-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: bc_capvsnetloss-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>bc_capvstsr-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: bc_capvstsr-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>lg_replimuereg-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: lg_replimuereg-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>px_26replimunepxy1pg01-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: px_26replimunepxy1pg01-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>px_26replimunepxy1pg02-4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: px_26replimunepxy1pg02-4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>R4.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: R4.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>19
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: FilingSummary.html

    Document 19 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>21
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>22
    <FILENAME>0001104659-26-087650-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 22 - file: 0001104659-26-087650-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>23
    <FILENAME>tm263608-4_def14a_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: tm263608-4_def14a_htm.html

    Document 23 - RAW XML: tm263608-4_def14a_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>