    <SEC-DOCUMENT>0001013762-23-002244-index.html : 20231005
    <SEC-HEADER>0001013762-23-002244.hdr.sgml : 20231005
    <ACCEPTANCE-DATETIME>20231005172818
    ACCESSION NUMBER:		0001013762-23-002244
    CONFORMED SUBMISSION TYPE:	S-1/A
    PUBLIC DOCUMENT COUNT:		8
    FILED AS OF DATE:		20231005
    DATE AS OF CHANGE:		20231005

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			SeqLL, Inc.
    		CENTRAL INDEX KEY:			0001605888
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-HELP SUPPLY SERVICES [7363]
    		IRS NUMBER:				465319744
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		S-1/A
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-272908
    		FILM NUMBER:		231312240

    	BUSINESS ADDRESS:
    		STREET 1:		317 NEW BOSTON STREET
    		STREET 2:		SUITE 210
    		CITY:			WOBURN
    		STATE:			MA
    		ZIP:			01801
    		BUSINESS PHONE:		(781) 817-3755

    	MAIL ADDRESS:
    		STREET 1:		317 NEW BOSTON STREET
    		STREET 2:		SUITE 210
    		CITY:			WOBURN
    		STATE:			MA
    		ZIP:			01801
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>S-1/A
    <SEQUENCE>1
    <FILENAME>fs12023a4_seqllinc.htm
    <DESCRIPTION>REGISTRATION STATEMENT
    <TEXT>
    Document 1 - file: fs12023a4_seqllinc.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-2.3
    <SEQUENCE>2
    <FILENAME>fs12023a4ex2-3_seqllinc.htm
    <DESCRIPTION>AMENDMENT NO. 2 TO AGREEMENT AND PLAN OF REORGANIZATION
    <TEXT>
    Document 2 - file: fs12023a4ex2-3_seqllinc.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-4.6
    <SEQUENCE>3
    <FILENAME>fs12023a4ex4-6_seqllinc.htm
    <DESCRIPTION>FORM OF WARRANT AGENCY AGREEMENT BETWEEN SEQLL INC. AND VSTOCK TRANSFER LLC INCLUDING FORM OF WARRANT CERTIFICATE
    <TEXT>
    Document 3 - file: fs12023a4ex4-6_seqllinc.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>4
    <FILENAME>fs12023a4ex23-1_seqllinc.htm
    <DESCRIPTION>CONSENT OF WOLF & COMPANY, P.C., INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
    <TEXT>
    Document 4 - file: fs12023a4ex23-1_seqllinc.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.2
    <SEQUENCE>5
    <FILENAME>fs12023a4ex23-2_seqllinc.htm
    <DESCRIPTION>CONSENT OF RBSM LLP
    <TEXT>
    Document 5 - file: fs12023a4ex23-2_seqllinc.htm

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>timage_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: timage_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ex23-2_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: ex23-2_001.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>