Ling Zeng - Sep 15, 2021 Form 4 Insider Report for Dicerna Pharmaceuticals Inc (DRNA)

Role: Chief Legal Officer & Sec'y
Signature: /s/ Douglas W. Pagan, attorney-in-fact
Stock symbol: DRNA
Transactions as of: Sep 15, 2021
Transactions value $: -$28,641
Form type: 4
Date filed: 9/17/2021, 06:48 PM
Next filing: Dec 17, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DRNA	Common Stock	Options Exercise		+4.56K			4.56K	Sep 15, 2021	Direct	F1
transaction	DRNA	Common Stock	Sale	-$28.6K	-1.33K	-29.28%	$21.47	3.22K	Sep 17, 2021	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	DRNA	Restricted Stock Units	Options Exercise	$0	-4.56K	-25%	$0.00	13.7K	Sep 15, 2021	Common Stock	4.56K		Direct	F1, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") represents the contingent right to receive one share of the Issuer's Common Stock.
F2	Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of the RSUs and does not represent a discretionary trade by the Reporting Person.
F3	Represents RSUs that vest over a period of four years, with 25% of the RSUs vesting on each of the first, second, third and fourth anniversaries of September 15, 2020, subject in each case to the Reporting Person's continued employment or service with the Issuer through the applicable vesting date