<SEC-DOCUMENT>0000728889-19-000106-index.html : 20190118
<SEC-HEADER>0000728889-19-000106.hdr.sgml : 20190118
<ACCEPTANCE-DATETIME>20190118113859
ACCESSION NUMBER:		0000728889-19-000106
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190118
DATE AS OF CHANGE:		20190118

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PDF SOLUTIONS INC
		CENTRAL INDEX KEY:			0001120914
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		IRS NUMBER:				251701361
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-77927
		FILM NUMBER:		19532657

	BUSINESS ADDRESS:	
		STREET 1:		2858 DE LA CRUZ BOULEVARD
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95050
		BUSINESS PHONE:		4082807900

	MAIL ADDRESS:	
		STREET 1:		2858 DE LA CRUZ BOULEVARD
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95050

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OppenheimerFunds, Inc.
		CENTRAL INDEX KEY:			0000728889
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		225 LIBERTY STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10281-1008
		BUSINESS PHONE:		212-323-0200

	MAIL ADDRESS:	
		STREET 1:		225 LIBERTY STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10281-1008

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OPPENHEIMER FUNDS INC
		DATE OF NAME CHANGE:	20020227

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OPPENHEIMER MANAGEMENT CORP
		DATE OF NAME CHANGE:	19940131
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>pdfsolutionsincsc13g.htm
<TEXT>
Document 1 - file: pdfsolutionsincsc13g.htm

</DOCUMENT>
</SEC-DOCUMENT>