FORM 4 [X] 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 *

Frati Robert		 2. Issuer Name and Ticker or Trading Symbol

Slack Technologies, Inc. [ WORK ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Sr VP Sales, Customer Success
(Last)          (First)          (Middle)

C/O SLACK TECHNOLOGIES, INC., 500 HOWARD STREET		 3. Date of Earliest Transaction (MM/DD/YYYY)

7/21/2021
(Street)

SAN FRANCISCO,, CA 94105
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ 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)
Code V Amount (A) or (D) Price
Class A Common Stock 7/21/2021  U  311483 (1)D (2)0 D  

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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units  (3)7/21/2021  D     7500   (4) (5)Class B Common Stock 7500.0 $0 0 D  
Restricted Stock Units  (3)7/21/2021  D     20500   (4) (5)Class B Common Stock 20500.0 $0 0 D  
Restricted Stock Units  (3)7/21/2021  D     109375   (4) (5)Class B Common Stock 109375.0 $0 0 D  
Stock Option (Right to Buy) $10.56 7/21/2021  D     114000   (6)2/26/2029 Class B Common Stock 114000.0 $0 0 D  
Stock Option (Right to Buy) $24.31 7/21/2021  D     187495   (6)4/5/2030 Class A Common Stock 187495.0 $0 0 D  
Explanation of Responses:
(1) Includes 56,215 shares of Class A common stock subject to restricted stock units ("RSUs") of the Issuer. Pursuant to the the Agreement and Plan of Merger, dated as of December 1, 2020 (the "Merger Agreement"), by and among salesforce.com, inc. ("Salesforce"), Skyline Strategies I Inc., Skyline Strategies II LLC, and the Issuer, at the effective time of the merger (the "Effective Time"), each of the Issuer's RSUs were assumed and converted into an RSU with respect to a number of shares of Salesforce common stock (rounded down to the nearest whole share) determined by multiplying (i) the number of shares of common stock subject to the Issuer RSU immediately prior to the Effective Time by (ii) the "option/RSU conversion ratio" as defined in the definitive proxy statement filed by the Issuer with the SEC on January 29, 2021. The converted RSU will otherwise be subject to the same terms and conditions as were applicable to the Issuer RSU prior to the Effective Time.
(2) Pursuant to the Merger Agreement, each share of the Issuer's common stock was tendered in exchange for (i) 0.0776 shares of Salesforce common stock and (ii) $26.79 in cash, together with cash in lieu of any fractional shares of Salesforce common stock.
(3) This RSU represents the right to receive shares of Class B common stock.
(4) Pursuant to the Merger Agreement, at the Effective Time, each of the Issuer's RSUs were assumed and converted into an RSU with respect to a number of shares of Salesforce common stock (rounded down to the nearest whole share) determined by multiplying (i) the number of shares of common stock subject to the Issuer RSU immediately prior to the Effective Time by (ii) the option/RSU conversion ratio. The converted RSU will otherwise be subject to the same terms and conditions as were applicable to the Issuer RSU prior to the Effective Time.
(5) Not applicable.
(6) Pursuant to the Merger Agreement, at the Effective Time, each outstanding option was assumed and converted into an option to purchase the number of shares of Salesforce common stock (rounded down to the nearest whole share) determined by multiplying (i) the number of shares of common stock subject to the Issuer option immediately prior to the Effective Time by (ii) the option/RSU conversion ratio, with an exercise price determined by dividing (i) the exercise price of the Issuer option immediately prior to the Effective Time by (ii) the option/RSU conversion ratio. The converted option will otherwise be subject to the same terms and conditions as were applicable to the Issuer option prior to the Effective Time.
Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Frati Robert
C/O SLACK TECHNOLOGIES, INC.
500 HOWARD STREET
SAN FRANCISCO,, CA 94105

Sr VP Sales, Customer Success
Signatures
/s/ David Schellhase, as Attorney-in-Fact7/21/2021
**Signature of Reporting PersonDate
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