13D Filing: RA Capital Management and Dicerna Pharmaceuticals Inc (DRNA)

Page 2 of 7 – SEC Filing

 

1

Names of Reporting Persons.

RA Capital Management, LLC

2 Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
3 SEC Use Only
4

Source of Funds (See Instructions):

AF

5

Check if disclosure of legal proceedings
is required pursuant to Items 2(d) or 2(e):

[ ]

6 Citizenship or Place of Organization.     Massachusetts

Number

of Shares

Beneficially

Owned by

Each

Reporting

Person With

7 Sole Voting Power     0
8 Shared Voting Power      4,588,536
9 Sole Dispositive Power     0
10 Shared Dispositive Power  4,588,536
11

Aggregate Amount Beneficially Owned by
Each Reporting Person

4,588,536

12 Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions)     [ ]
13

Percent of Class Represented by Amount
in Row (11)

19.9%1

14

Type of Reporting Person (See Instructions)

IA, OO (Limited Liability Company)

_________________

1 Represents 2,428,571 shares
of the common stock (“Common Stock”) of Dicerna Pharmaceuticals, Inc. (the “Issuer”) and 2,159,965 shares
of the Common Stock issuable upon conversion of Preferred Stock (as defined below) which constitute approximately 19.94% of the
class outstanding. The percentage calculation assumes that there are currently 20,848,503 outstanding shares of the Common Stock
of the Issuer, based on the Issuer’s Form 10-Q for the quarterly period ended September 30, 2017 as filed with the Securities
and Exchange Commission (“SEC”) on November 2, 2017.

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