    <SEC-DOCUMENT>0001140361-24-016945-index.html : 20240401
    <SEC-HEADER>0001140361-24-016945.hdr.sgml : 20240401
    <ACCEPTANCE-DATETIME>20240401164248
    ACCESSION NUMBER:		0001140361-24-016945
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		7
    CONFORMED PERIOD OF REPORT:	20240515
    FILED AS OF DATE:		20240401
    DATE AS OF CHANGE:		20240401

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Quantum-Si Inc
    		CENTRAL INDEX KEY:			0001816431
    		STANDARD INDUSTRIAL CLASSIFICATION:	MEASURING & CONTROLLING DEVICES, NEC [3829]
    		ORGANIZATION NAME:           	08 Industrial Applications and Services
    		IRS NUMBER:				851388175
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39486
    		FILM NUMBER:		24810187

    	BUSINESS ADDRESS:
    		STREET 1:		29 BUSINESS PARK DRIVE
    		CITY:			BRANFORD
    		STATE:			CT
    		ZIP:			06405
    		BUSINESS PHONE:		(203) 458-7100

    	MAIL ADDRESS:
    		STREET 1:		29 BUSINESS PARK DRIVE
    		CITY:			BRANFORD
    		STATE:			CT
    		ZIP:			06405

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	HighCape Capital Acquisition Corp.
    		DATE OF NAME CHANGE:	20200629
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>ny20022991x3_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: ny20022991x3_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>ny20022991x3_pc01.jpg
    <TEXT>
    Document 2 - file: ny20022991x3_pc01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>ny20022991x3_pc02.jpg
    <TEXT>
    Document 3 - file: ny20022991x3_pc02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ny20022991x3_pvpimage01.jpg
    <TEXT>
    Document 4 - file: ny20022991x3_pvpimage01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ny20022991x3_pvpimage02.jpg
    <TEXT>
    Document 5 - file: ny20022991x3_pvpimage02.jpg

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>logo_quantumsi24.jpg
    <TEXT>
    Document 7 - file: logo_quantumsi24.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>