    <SEC-DOCUMENT>0001576885-24-000039-index.html : 20240319
    <SEC-HEADER>0001576885-24-000039.hdr.sgml : 20240319
    <ACCEPTANCE-DATETIME>20240319080509
    ACCESSION NUMBER:		0001576885-24-000039
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		62
    CONFORMED PERIOD OF REPORT:	20240319
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20240319
    DATE AS OF CHANGE:		20240319

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Acumen Pharmaceuticals, Inc.
    		CENTRAL INDEX KEY:			0001576885
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		ORGANIZATION NAME:           	03 Life Sciences
    		IRS NUMBER:				364108129
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-40551
    		FILM NUMBER:		24761144

    	BUSINESS ADDRESS:
    		STREET 1:		427 PARK ST.
    		CITY:			CHARLOTTESVILLE
    		STATE:			VA
    		ZIP:			22902
    		BUSINESS PHONE:		925-368-8508

    	MAIL ADDRESS:
    		STREET 1:		427 PARK ST.
    		CITY:			CHARLOTTESVILLE
    		STATE:			VA
    		ZIP:			22902
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>abos-20240319.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: abos-20240319.htm

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>abos-20240319.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: abos-20240319.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>abos-20240319_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: abos-20240319_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>abos-20240319_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: abos-20240319_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>acumen_ncxcorporatexdeck001.jpg
    <TEXT>
    Document 6 - file: acumen_ncxcorporatexdeck001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>acumen_ncxcorporatexdeck002.jpg
    <TEXT>
    Document 7 - file: acumen_ncxcorporatexdeck002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>acumen_ncxcorporatexdeck003.jpg
    <TEXT>
    Document 8 - file: acumen_ncxcorporatexdeck003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>acumen_ncxcorporatexdeck004.jpg
    <TEXT>
    Document 9 - file: acumen_ncxcorporatexdeck004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>acumen_ncxcorporatexdeck005.jpg
    <TEXT>
    Document 10 - file: acumen_ncxcorporatexdeck005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>acumen_ncxcorporatexdeck006.jpg
    <TEXT>
    Document 11 - file: acumen_ncxcorporatexdeck006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>acumen_ncxcorporatexdeck007.jpg
    <TEXT>
    Document 12 - file: acumen_ncxcorporatexdeck007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>acumen_ncxcorporatexdeck008.jpg
    <TEXT>
    Document 13 - file: acumen_ncxcorporatexdeck008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>acumen_ncxcorporatexdeck009.jpg
    <TEXT>
    Document 14 - file: acumen_ncxcorporatexdeck009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>acumen_ncxcorporatexdeck010.jpg
    <TEXT>
    Document 15 - file: acumen_ncxcorporatexdeck010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>acumen_ncxcorporatexdeck011.jpg
    <TEXT>
    Document 16 - file: acumen_ncxcorporatexdeck011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>acumen_ncxcorporatexdeck012.jpg
    <TEXT>
    Document 17 - file: acumen_ncxcorporatexdeck012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>acumen_ncxcorporatexdeck013.jpg
    <TEXT>
    Document 18 - file: acumen_ncxcorporatexdeck013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>acumen_ncxcorporatexdeck014.jpg
    <TEXT>
    Document 19 - file: acumen_ncxcorporatexdeck014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>acumen_ncxcorporatexdeck015.jpg
    <TEXT>
    Document 20 - file: acumen_ncxcorporatexdeck015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>acumen_ncxcorporatexdeck016.jpg
    <TEXT>
    Document 21 - file: acumen_ncxcorporatexdeck016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>acumen_ncxcorporatexdeck017.jpg
    <TEXT>
    Document 22 - file: acumen_ncxcorporatexdeck017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>acumen_ncxcorporatexdeck018.jpg
    <TEXT>
    Document 23 - file: acumen_ncxcorporatexdeck018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>acumen_ncxcorporatexdeck019.jpg
    <TEXT>
    Document 24 - file: acumen_ncxcorporatexdeck019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>acumen_ncxcorporatexdeck020.jpg
    <TEXT>
    Document 25 - file: acumen_ncxcorporatexdeck020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>acumen_ncxcorporatexdeck021.jpg
    <TEXT>
    Document 26 - file: acumen_ncxcorporatexdeck021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>acumen_ncxcorporatexdeck022.jpg
    <TEXT>
    Document 27 - file: acumen_ncxcorporatexdeck022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>acumen_ncxcorporatexdeck023.jpg
    <TEXT>
    Document 28 - file: acumen_ncxcorporatexdeck023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>acumen_ncxcorporatexdeck024.jpg
    <TEXT>
    Document 29 - file: acumen_ncxcorporatexdeck024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>acumen_ncxcorporatexdeck025.jpg
    <TEXT>
    Document 30 - file: acumen_ncxcorporatexdeck025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>acumen_ncxcorporatexdeck026.jpg
    <TEXT>
    Document 31 - file: acumen_ncxcorporatexdeck026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>acumen_ncxcorporatexdeck027.jpg
    <TEXT>
    Document 32 - file: acumen_ncxcorporatexdeck027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>acumen_ncxcorporatexdeck028.jpg
    <TEXT>
    Document 33 - file: acumen_ncxcorporatexdeck028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>acumen_ncxcorporatexdeck029.jpg
    <TEXT>
    Document 34 - file: acumen_ncxcorporatexdeck029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>acumen_ncxcorporatexdeck030.jpg
    <TEXT>
    Document 35 - file: acumen_ncxcorporatexdeck030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>acumen_ncxcorporatexdeck031.jpg
    <TEXT>
    Document 36 - file: acumen_ncxcorporatexdeck031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>acumen_ncxcorporatexdeck032.jpg
    <TEXT>
    Document 37 - file: acumen_ncxcorporatexdeck032.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>acumen_ncxcorporatexdeck033.jpg
    <TEXT>
    Document 38 - file: acumen_ncxcorporatexdeck033.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>acumen_ncxcorporatexdeck034.jpg
    <TEXT>
    Document 39 - file: acumen_ncxcorporatexdeck034.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>acumen_ncxcorporatexdeck035.jpg
    <TEXT>
    Document 40 - file: acumen_ncxcorporatexdeck035.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>acumen_ncxcorporatexdeck036.jpg
    <TEXT>
    Document 41 - file: acumen_ncxcorporatexdeck036.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>acumen_ncxcorporatexdeck037.jpg
    <TEXT>
    Document 42 - file: acumen_ncxcorporatexdeck037.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>acumen_ncxcorporatexdeck038.jpg
    <TEXT>
    Document 43 - file: acumen_ncxcorporatexdeck038.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>acumen_ncxcorporatexdeck039.jpg
    <TEXT>
    Document 44 - file: acumen_ncxcorporatexdeck039.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>acumen_ncxcorporatexdeck040.jpg
    <TEXT>
    Document 45 - file: acumen_ncxcorporatexdeck040.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>46
    <FILENAME>acumen_ncxcorporatexdeck041.jpg
    <TEXT>
    Document 46 - file: acumen_ncxcorporatexdeck041.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>47
    <FILENAME>acumen_ncxcorporatexdeck042.jpg
    <TEXT>
    Document 47 - file: acumen_ncxcorporatexdeck042.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>48
    <FILENAME>acumen_ncxcorporatexdeck043.jpg
    <TEXT>
    Document 48 - file: acumen_ncxcorporatexdeck043.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>49
    <FILENAME>acumen_ncxcorporatexdeck044.jpg
    <TEXT>
    Document 49 - file: acumen_ncxcorporatexdeck044.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>50
    <FILENAME>acumen_ncxcorporatexdeck045.jpg
    <TEXT>
    Document 50 - file: acumen_ncxcorporatexdeck045.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>51
    <FILENAME>acumen_ncxcorporatexdeck046.jpg
    <TEXT>
    Document 51 - file: acumen_ncxcorporatexdeck046.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>52
    <FILENAME>acumen_ncxcorporatexdeck047.jpg
    <TEXT>
    Document 52 - file: acumen_ncxcorporatexdeck047.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>53
    <FILENAME>acumen_ncxcorporatexdeck048.jpg
    <TEXT>
    Document 53 - file: acumen_ncxcorporatexdeck048.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>55
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 55 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>56
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 56 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>57
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 57 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>58
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 58 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>60
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 60 - file: FilingSummary.html

    Document 60 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>62
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 62 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>63
    <FILENAME>0001576885-24-000039-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 63 - file: 0001576885-24-000039-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>65
    <FILENAME>abos-20240319_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 65 - file: abos-20240319_htm.html

    Document 65 - RAW XML: abos-20240319_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>