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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1764925	Slack Technologies Inc.	WORK	Services-Prepackaged Software (7372)	264400325

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1775681	Allen Shim	C/O Slack Technologies, Inc. 500 Howard Street San Francisco, CA 94105	Chief Financial Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Class A Common Stock	Acquisiton	2021-02-01	56,407	$0.00	274,567	No	4	C	Direct
Class A Common Stock	Disposition	2021-02-01	25,302	$42.45	249,265	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class B Common Stock	Restricted Stock Units	Disposition	2021-02-01	42,657	$0.00	42,657	$0.00
Class A Common Stock	Class B Common Stock	Acquisiton	2021-02-01	42,657	$0.00	42,657	$0.00
Class B Common Stock	Restricted Stock Units	Disposition	2021-02-01	13,750	$0.00	13,750	$0.00
Class A Common Stock	Class B Common Stock	Acquisiton	2021-02-01	13,750	$0.00	13,750	$0.00
Class A Common Stock	Class B Common Stock	Disposition	2021-02-01	56,407	$0.00	56,407	$0.00

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
170,625	2025-02-21	No	4	M	Direct
42,657		No	4	M	Direct
110,000	2026-02-26	No	4	M	Direct
56,407		No	4	M	Direct
0		No	4	C	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Class A Common Stock	271,468	Indirect	By LLC
Class A Common Stock	76,308	Indirect	By Allen Shim, trustee of the Allen Shim 2019 Grantor Retained Annuity Trust dated May 1, 2019
Class A Common Stock	1,529,105	Indirect	By The Shim-Park Family Revocable Trust

Footnotes

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.
Shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs).
These shares are held of record by a LLC of which the Reporting Person is the manager. A family trust, for which the Reporting Person is investment advisor, is the sole member of the LLC.
Each RSU represents the right to receive one share of Class B Common Stock.
The RSUs are subject to time-based and performance-based vesting criteria. The time-based vesting occurs in 16 quarterly installments commencing on May 1, 2018, subject to the Reporting Person's continued service with the Issuer on each such date. The performance-based criteria was satisfied upon the Issuer's listing and public trading of its of Class A Common Stock on June 20, 2019.
The RSUs are subject to time-based and performance-based vesting criteria. The time-based vesting occurs in 16 equal quarterly installments commencing on May 1, 2019, subject to the Reporting Person's continued service with the Issuer on each such date. The performance-based criteria was satisfied upon the listing and public trading of its of Class A Common Stock on June 20, 2019.