<SEC-DOCUMENT>0001104659-19-062395-index.html : 20191112
<SEC-HEADER>0001104659-19-062395.hdr.sgml : 20191112
<ACCEPTANCE-DATETIME>20191112124013
ACCESSION NUMBER:		0001104659-19-062395
CONFORMED SUBMISSION TYPE:	13F-HR
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20190930
FILED AS OF DATE:		20191112
DATE AS OF CHANGE:		20191112
EFFECTIVENESS DATE:		20191112

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLAIR WILLIAM & CO/IL
		CENTRAL INDEX KEY:			0000902367
		IRS NUMBER:				362214610
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		13F-HR
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	028-04871
		FILM NUMBER:		191207997

	BUSINESS ADDRESS:	
		STREET 1:		150 NORTH RIVERSIDE PLAZA
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606-5312
		BUSINESS PHONE:		3122361600

	MAIL ADDRESS:	
		STREET 1:		150 NORTH RIVERSIDE PLAZA
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</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
<TEXT>
Document 2 - file: infotable.html

Document 2 - RAW XML: infotable.xml

</DOCUMENT>
</SEC-DOCUMENT>