<SEC-DOCUMENT>0001437749-20-012777-index.html : 20200610
<SEC-HEADER>0001437749-20-012777.hdr.sgml : 20200610
<ACCEPTANCE-DATETIME>20200609210220
ACCESSION NUMBER:		0001437749-20-012777
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20191231
FILED AS OF DATE:		20200610
DATE AS OF CHANGE:		20200609

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PDF SOLUTIONS INC
		CENTRAL INDEX KEY:			0001120914
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				251701361
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31311
		FILM NUMBER:		20953339

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>pdfs20200609_10ka.htm
<DESCRIPTION>FORM 10-K/A
<TEXT>
Document 1 - file: pdfs20200609_10ka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.01
<SEQUENCE>2
<FILENAME>ex_189731.htm
<DESCRIPTION>EXHIBIT 31.01
<TEXT>
Document 2 - file: ex_189731.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.02
<SEQUENCE>3
<FILENAME>ex_189732.htm
<DESCRIPTION>EXHIBIT 31.02
<TEXT>
Document 3 - file: ex_189732.htm

</DOCUMENT>
</SEC-DOCUMENT>