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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1426800	Assembly Biosciences Inc.	ASMB	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1735729	Sybil Jacqueline Papkoff	C/O Assembly Biosciences, Inc. 331 Oyster Point Blvd., Fourth Floor South San Francisco CA 94080	Svp-Cso Microbiome	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
Common Stock	Acquisiton	2020-03-27	17,000	$0.00	39,915	No	4	A	Direct
Common Stock	Disposition	2020-03-30	1,254	$14.22	38,661	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Common Stock (right to buy)	Acquisiton	2020-03-27	34,000	$0.00	34,000	$14.45

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
34,000		2030-03-27	No	4	A	Direct

Footnotes

Grant of restricted stock units. The restricted stock units vest in four equal installments, assuming continuous service on each vesting date, as follows: March 29, 2021; March 29, 2022; March 29, 2023; and March 29, 2024.
The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person and represents shares sold to cover tax withholding obligations in connection with the vesting of restricted stock units.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.05 to $14.79, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within.
Grant of stock options. The stock options vest over four years, assuming continuous service on each vesting date, as follows: 25% vest on March 29, 2021; and the remaining 75% vest in 36 approximately equal monthly installments, with the options becoming fully vested on March 29, 2024.