<SEC-DOCUMENT>0000919574-18-001139-index.html : 20180213
<SEC-HEADER>0000919574-18-001139.hdr.sgml : 20180213
<ACCEPTANCE-DATETIME>20180213154629
ACCESSION NUMBER:		0000919574-18-001139
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180213
DATE AS OF CHANGE:		20180213

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/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-77927
		FILM NUMBER:		18602997

	BUSINESS ADDRESS:	
		STREET 1:		333 WEST SAN CARLOS STREET
		STREET 2:		SUITE 700
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110
		BUSINESS PHONE:		4082807900

	MAIL ADDRESS:	
		STREET 1:		333 WEST SAN JOSE STREET
		STREET 2:		SUITE 700
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CARDINAL CAPITAL MANAGEMENT LLC /CT
		CENTRAL INDEX KEY:			0001080383
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		FOUR GREENWICH OFFICE PARK
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06831
		BUSINESS PHONE:		203-863-8981

	MAIL ADDRESS:	
		STREET 1:		FOUR GREENWICH OFFICE PARK
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06831
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>d7820374_13g-a.htm
<TEXT>
Document 1 - file: d7820374_13g-a.htm

</DOCUMENT>
</SEC-DOCUMENT>