13D Filing: Bain Capital Life Sciences Fund, L.p. and Dicerna Pharmaceuticals Inc (NASDAQ:DRNA)

Names of
Reporting Persons

Bain Capital Life Sciences Fund, L.P.

Check the Appropriate Box if a Member
of a Group

(a)  ☐        (b)  ☐

SEC Use Only

Source of Funds

WC

Check if Disclosure of Legal
Proceedings is Required Pursuant to Item 2(d) or 2(e)  ☐

Citizenship or Place of
Organization

Delaware

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With

Sole Voting Power

7,088,996 shares of Common Stock

Shared Voting Power

0 shares of Common Stock

Sole Dispositive Power

7,088,996 shares of Common Stock

Shared Dispositive Power

0 shares of Common Stock

Aggregate Amount Beneficially Owned by Each Reporting Person

7,088,996 shares of Common Stock

Check if the Aggregate Amount in Row
(11) Excludes Certain Shares  ☐

Percent of Class Represented by Amount
in Row (11)

25.4%

Type of Reporting Person

PN