    <SEC-DOCUMENT>0001213900-21-003801-index.html : 20210122
    <SEC-HEADER>0001213900-21-003801.hdr.sgml : 20210122
    <ACCEPTANCE-DATETIME>20210122172747
    ACCESSION NUMBER:		0001213900-21-003801
    CONFORMED SUBMISSION TYPE:	SUPPL
    PUBLIC DOCUMENT COUNT:		4
    FILED AS OF DATE:		20210122
    DATE AS OF CHANGE:		20210122
    EFFECTIVENESS DATE:		20210122

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			SEABRIDGE GOLD INC
    		CENTRAL INDEX KEY:			0001231346
    		STANDARD INDUSTRIAL CLASSIFICATION:	GOLD & SILVER ORES [1040]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			A6
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		SUPPL
    		SEC ACT:
    		SEC FILE NUMBER:	333-251081
    		FILM NUMBER:		21547192

    	BUSINESS ADDRESS:
    		STREET 1:		106 FRONT STREET EAST
    		STREET 2:		SUITE 400
    		CITY:			TORONTO
    		STATE:			A6
    		ZIP:			M5A 1E1
    		BUSINESS PHONE:		416-367-9292

    	MAIL ADDRESS:
    		STREET 1:		106 FRONT STREET EAST
    		STREET 2:		SUITE 400
    		CITY:			TORONTO
    		STATE:			A6
    		ZIP:			M5A 1E1
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>SUPPL
    <SEQUENCE>1
    <FILENAME>ea133764-suppl_seabridge.htm
    <DESCRIPTION>PROSPECTUS SUPPLEMENT
    <TEXT>
    Document 1 - file: ea133764-suppl_seabridge.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>image_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: image_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>image_002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: image_002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>image_003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: image_003.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>