<SEC-DOCUMENT>0001628280-19-007818-index.html : 20190607
<SEC-HEADER>0001628280-19-007818.hdr.sgml : 20190607
<ACCEPTANCE-DATETIME>20190607205847
ACCESSION NUMBER:		0001628280-19-007818
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20190607
FILED AS OF DATE:		20190607
DATE AS OF CHANGE:		20190607

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel X LP
		CENTRAL INDEX KEY:			0001419457
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887389

	BUSINESS ADDRESS:	
		STREET 1:		428 University Ave
		CITY:			Palo Alto
		STATE:			ca
		ZIP:			94301
		BUSINESS PHONE:		650-614-4800

	MAIL ADDRESS:	
		STREET 1:		428 University Ave
		CITY:			Palo Alto
		STATE:			ca
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ACCEL X STRATEGIC PARTNERS LP
		CENTRAL INDEX KEY:			0001430231
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887390

	BUSINESS ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		650 614-4800

	MAIL ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel X Associates L.L.C.
		CENTRAL INDEX KEY:			0001494996
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887391

	BUSINESS ADDRESS:	
		STREET 1:		500 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		650-614-4800

	MAIL ADDRESS:	
		STREET 1:		500 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel Investors 2009 L.L.C.
		CENTRAL INDEX KEY:			0001494979
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887392

	BUSINESS ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		650-614-4800

	MAIL ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel XI L.P.
		CENTRAL INDEX KEY:			0001522763
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887393

	BUSINESS ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		(650) 614-4800

	MAIL ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel XI Strategic Partners L.P.
		CENTRAL INDEX KEY:			0001527391
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887394

	BUSINESS ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		(650) 614-4800

	MAIL ADDRESS:	
		STREET 1:		428 UNIVERSITY AVENUE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel XI Associates L.L.C.
		CENTRAL INDEX KEY:			0001535603
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887395

	BUSINESS ADDRESS:	
		STREET 1:		428 UNIVERSITY AVE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		650-614-4800

	MAIL ADDRESS:	
		STREET 1:		428 UNIVERSITY AVE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Accel Investors 2013 L.L.C.
		CENTRAL INDEX KEY:			0001589159
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38926
		FILM NUMBER:		19887396

	BUSINESS ADDRESS:	
		STREET 1:		428 UNIVERSITY AVE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301
		BUSINESS PHONE:		650-614-4800

	MAIL ADDRESS:	
		STREET 1:		428 UNIVERSITY AVE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94301

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Slack Technologies, Inc.
		CENTRAL INDEX KEY:			0001764925
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-TELEPHONE INTERCONNECT SYSTEMS [7385]
		IRS NUMBER:				264400325
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	BUSINESS ADDRESS:	
		STREET 1:		500 HOWARD STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94105
		BUSINESS PHONE:		4159025526

	MAIL ADDRESS:	
		STREET 1:		500 HOWARD STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94105
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>wf-form3_155995551105875.xml
<DESCRIPTION>FORM 3
<TEXT>
Document 1 - file: wf-form3_155995551105875.html

Document 1 - RAW XML: wf-form3_155995551105875.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex-24.htm
<DESCRIPTION>ACCEL POA
<TEXT>
Document 2 - file: ex-24.htm

</DOCUMENT>
</SEC-DOCUMENT>