    <SEC-DOCUMENT>0001644378-26-000006-index.html : 20260204
    <SEC-HEADER>0001644378-26-000006.hdr.sgml : 20260204
    <ACCEPTANCE-DATETIME>20260204161635
    ACCESSION NUMBER:		0001644378-26-000006
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		46
    CONFORMED PERIOD OF REPORT:	20260204
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20260204
    DATE AS OF CHANGE:		20260204

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			RMR GROUP INC.
    		CENTRAL INDEX KEY:			0001644378
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
    		ORGANIZATION NAME:           	07 Trade & Services
    		EIN:				474122583
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-37616
    		FILM NUMBER:		26598414

    	BUSINESS ADDRESS:
    		STREET 1:		TWO NEWTON PL., 255 WASH. ST., STE. 300
    		CITY:			NEWTON
    		STATE:			MA
    		ZIP:			02458
    		BUSINESS PHONE:		(617) 796-8320

    	MAIL ADDRESS:
    		STREET 1:		TWO NEWTON PL., 255 WASH. ST., STE. 300
    		CITY:			NEWTON
    		STATE:			MA
    		ZIP:			02458

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	RMR Group Inc.
    		DATE OF NAME CHANGE:	20150910

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Reit Management & Research Inc.
    		DATE OF NAME CHANGE:	20150608
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>rmr-20260204.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: rmr-20260204.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>rmr_12312025x8-kxexhibit991.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: rmr_12312025x8-kxexhibit991.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>rmr_12312025x8-kxexhibit.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: rmr_12312025x8-kxexhibit.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>rmr-20260204.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 4 - file: rmr-20260204.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>5
    <FILENAME>rmr-20260204_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: rmr-20260204_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>6
    <FILENAME>rmr-20260204_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: rmr-20260204_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>a8kimage1a08a.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: a8kimage1a08a.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>rmr_12312025x8-kxexhibit001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: rmr_12312025x8-kxexhibit001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>rmr_12312025x8-kxexhibit002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: rmr_12312025x8-kxexhibit002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>rmr_12312025x8-kxexhibit003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: rmr_12312025x8-kxexhibit003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>rmr_12312025x8-kxexhibit004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: rmr_12312025x8-kxexhibit004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>rmr_12312025x8-kxexhibit005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: rmr_12312025x8-kxexhibit005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>rmr_12312025x8-kxexhibit006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: rmr_12312025x8-kxexhibit006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>rmr_12312025x8-kxexhibit007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: rmr_12312025x8-kxexhibit007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>rmr_12312025x8-kxexhibit008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: rmr_12312025x8-kxexhibit008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>rmr_12312025x8-kxexhibit009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: rmr_12312025x8-kxexhibit009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>rmr_12312025x8-kxexhibit010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: rmr_12312025x8-kxexhibit010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>rmr_12312025x8-kxexhibit011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: rmr_12312025x8-kxexhibit011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>rmr_12312025x8-kxexhibit012.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: rmr_12312025x8-kxexhibit012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>rmr_12312025x8-kxexhibit013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: rmr_12312025x8-kxexhibit013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>rmr_12312025x8-kxexhibit014.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: rmr_12312025x8-kxexhibit014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>rmr_12312025x8-kxexhibit015.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: rmr_12312025x8-kxexhibit015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>rmr_12312025x8-kxexhibit016.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: rmr_12312025x8-kxexhibit016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>rmr_12312025x8-kxexhibit017.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: rmr_12312025x8-kxexhibit017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>rmr_12312025x8-kxexhibit018.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: rmr_12312025x8-kxexhibit018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>rmr_12312025x8-kxexhibit019.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: rmr_12312025x8-kxexhibit019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>rmr_12312025x8-kxexhibit020.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: rmr_12312025x8-kxexhibit020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>rmr_12312025x8-kxexhibit021.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: rmr_12312025x8-kxexhibit021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>rmr_12312025x8-kxexhibit022.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: rmr_12312025x8-kxexhibit022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>rmr_12312025x8-kxexhibit023.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: rmr_12312025x8-kxexhibit023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>rmr_12312025x8-kxexhibit024.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 31 - file: rmr_12312025x8-kxexhibit024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>rmr_12312025x8-kxexhibit025.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 32 - file: rmr_12312025x8-kxexhibit025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>rmr_12312025x8-kxexhibit026.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 33 - file: rmr_12312025x8-kxexhibit026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>rmr_12312025x8-kxexhibit027.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 34 - file: rmr_12312025x8-kxexhibit027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>rmr_12312025x8-kxexhibit028.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 35 - file: rmr_12312025x8-kxexhibit028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>rmr_12312025x8-kxexhibit029.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 36 - file: rmr_12312025x8-kxexhibit029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>rmr_12312025x8-kxexhibit030.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 37 - file: rmr_12312025x8-kxexhibit030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>rmr_12312025x8-kxexhibit031.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 38 - file: rmr_12312025x8-kxexhibit031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>40
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 40 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>41
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 41 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>42
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 42 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>44
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 44 - file: FilingSummary.html

    Document 44 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>46
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>47
    <FILENAME>0001644378-26-000006-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: 0001644378-26-000006-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>48
    <FILENAME>rmr-20260204_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: rmr-20260204_htm.html

    Document 48 - RAW XML: rmr-20260204_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>