    <SEC-DOCUMENT>0001628280-25-055291-index.html : 20251204
    <SEC-HEADER>0001628280-25-055291.hdr.sgml : 20251204
    <ACCEPTANCE-DATETIME>20251204140113
    ACCESSION NUMBER:		0001628280-25-055291
    CONFORMED SUBMISSION TYPE:	424B3
    PUBLIC DOCUMENT COUNT:		12
    FILED AS OF DATE:		20251204
    DATE AS OF CHANGE:		20251204

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			HERITAGE FINANCIAL CORP /WA/
    		CENTRAL INDEX KEY:			0001046025
    		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED [6036]
    		ORGANIZATION NAME:           	02 Finance
    		EIN:				911857900
    		STATE OF INCORPORATION:			WA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		424B3
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-291538
    		FILM NUMBER:		251548976

    	BUSINESS ADDRESS:
    		STREET 1:		201 FIFTH AVENUE S.W.
    		STREET 2:		P O BOX 1578
    		CITY:			OLYMPIA
    		STATE:			WA
    		ZIP:			98501
    		BUSINESS PHONE:		3609431500

    	MAIL ADDRESS:
    		STREET 1:		205 5TH AVE SW
    		STREET 2:		P O BOX 1578
    		CITY:			OLYMPIA
    		STATE:			WA
    		ZIP:			98501
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>424B3
    <SEQUENCE>1
    <FILENAME>a424b3hfwa-olympicmerger.htm
    <DESCRIPTION>424B3
    <TEXT>
    Document 1 - file: a424b3hfwa-olympicmerger.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>bmlegalsignature002.jpg
    <TEXT>
    Document 2 - file: bmlegalsignature002.jpg

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

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

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

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

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

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

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

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

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

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

    </DOCUMENT>
    </SEC-DOCUMENT>