<SEC-DOCUMENT>0001007524-25-000003-index.html : 20251114
<SEC-HEADER>0001007524-25-000003.hdr.sgml : 20251114
<ACCEPTANCE-DATETIME>20251114144922
ACCESSION NUMBER:		0001007524-25-000003
CONFORMED SUBMISSION TYPE:	13F-HR
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20250930
FILED AS OF DATE:		20251114
DATE AS OF CHANGE:		20251114
EFFECTIVENESS DATE:		20251114

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OSTERWEIS CAPITAL MANAGEMENT INC
		CENTRAL INDEX KEY:			0001007524
		ORGANIZATION NAME:           	
		EIN:				942871718
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		13F-HR
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	028-04483
		FILM NUMBER:		251484807

	BUSINESS ADDRESS:	
		STREET 1:		ONE MARITIME PLAZA
		STREET 2:		STE 800
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		4154344441

	MAIL ADDRESS:	
		STREET 1:		ONE MARITIME PLAZA
		STREET 2:		STE 800
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
</SEC-HEADER>
<DOCUMENT>
<TYPE>13F-HR
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

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<DOCUMENT>
<TYPE>INFORMATION TABLE
<SEQUENCE>2
<FILENAME>infotable.xml
<DESCRIPTION>INFORMATION TABLE
<TEXT>
Document 2 - file: infotable.html

Document 2 - RAW XML: infotable.xml

</DOCUMENT>
</SEC-DOCUMENT>