Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Accel XI L.P.	2. Issuer Name and Ticker or Trading Symbol Slack Technologies, Inc. [ WORK ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) 500 UNIVERSITY AVENUE	3. Date of Earliest Transaction (MM/DD/YYYY) 6/12/2020
(Street) PALO ALTO, CA 94301 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	6/12/2020		C		7318664	A	$0.00 ⁽¹⁾	7318664	D ⁽²⁾
Class A Common Stock	6/12/2020		J⁽³⁾		7318664	D	$0.00	0	D ⁽²⁾
Class A Common Stock	6/12/2020		C		549880	A	$0.00 ⁽¹⁾	549880	I	By Accel XI Strategic Partners L.P. ⁽⁴⁾
Class A Common Stock	6/12/2020		J⁽⁵⁾		549880	D	$0.00	0	I	By Accel XI Strategic Partners L.P. ⁽⁴⁾
Class A Common Stock	6/12/2020		C		777244	A	$0.00 ⁽¹⁾	777244	I	By Accel Investors 2013 L.L.C. ⁽⁶⁾
Class A Common Stock	6/12/2020		J⁽⁷⁾		777244	D	$0.00	0	I	By Accel Investors 2013 L.L.C. ⁽⁶⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Class B Common Stock	⁽¹⁾	6/12/2020		C			7318664	⁽¹⁾	⁽¹⁾	Class A Common Stock	7318664	$0.00	0	D ⁽²⁾
Class B Common Stock	⁽¹⁾	6/12/2020		C			549880	⁽¹⁾	⁽¹⁾	Class A Common Stock	549880	$0.00	0	I	By Accel XI Strategic Partners L.P. ⁽⁴⁾
Class B Common Stock	⁽¹⁾	6/12/2020		C			777244	⁽¹⁾	⁽¹⁾	Class A Common Stock	777244	$0.00	0	I	By Accel Investors 2013 L.L.C. ⁽⁶⁾

Explanation of Responses:
(1)	Each share of Class B Common Stock is convertible without payment or consideration into one share of Class A Common Stock at the option of the holder and has no expiration date.
(2)	These shares are held by Accel XI L.P. Accel XI Associates L.L.C. ("Accel XI GP") is the general partner of each of Accel XI L.P. and Accel XI Strategic Partners L.P. (together, the "Accel XI Entities"). Accel XI GP has sole voting and dispositive power with regard to the shares held by the Accel XI Entities. Accel XI GP disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that such reporting person is the beneficial owner of such securities for Section 16 or any other purpose.
(3)	On June 12, 2020, Accel XI L.P. distributed, for no consideration, 7,318,664 shares of Class A common stock of the Issuer (the "Accel XI Shares") to its limited partners and to Accel XI GP, the general partner of Accel XI L.P., representing each such partner's pro rata interest in such Accel XI Shares. On the same date, Accel XI GP distributed, for no consideration, the Accel XI Shares it received in the distribution by Accel XI L.P. to its members, representing each such member's pro rata interest in such Accel XI Shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.
(4)	These shares are held by Accel XI Strategic Partners L.P. Accel XI GP disclaims Section 16 beneficial ownership over the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that such reporting person is the beneficial owner of such securities for Section 16 or any other purpose.
(5)	On June 12, 2020, Accel XI Strategic Partners L.P. distributed, for no consideration, 549,880 shares of Class A common stock of the Issuer (the "Accel XI Strategic Shares") to its limited partners and to Accel XI GP, the general partner of Accel XI Strategic Partners L.P., representing each such partner's pro rata interest in such Accel XI Strategic Shares. On the same date, Accel XI GP distributed, for no consideration, the Accel XI Strategic Shares it received in the distribution by the Fund to its members, representing each such member's pro rata interest in such Accel XI Strategic Shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.
(6)	These shares are held by Accel Investors 2013 L.L.C.
(7)	On June 12, 2020, Accel Investors 2013 L.L.C. distributed, for no consideration, 777,244 shares of Class A common stock of the Issuer (the "Accel 2013 Shares") to its members, representing each such member's pro rata interest in such Accel 2013 Shares. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Accel XI L.P. 500 UNIVERSITY AVENUE PALO ALTO, CA 94301		X
Accel XI Strategic Partners L.P. 500 UNIVERSITY AVENUE PALO ALTO, CA 94301		X
Accel XI Associates L.L.C. 500 UNIVERSITY AVENUE PALO ALTO, CA 94301		X
Accel Investors 2013 L.L.C. 500 UNIVERSITY AVENUE PALO ALTO, CA 94301		X