SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 1)

Dicerna Pharmaceuticals Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

253031108

(CUSIP Number)

December 31, 2021

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐	Rule 13d-1(b)

☒	Rule 13d-1(c)

☐	Rule 13d-1(d)

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 253031108				Page 2 of 28 Pages

NAMES OF REPORTING PERSONS

  I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (Entities Only)

  Atlas Diversified Master Fund, Ltd.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a) ☐ (b) ☐

SEC USE ONLY

CITIZENSHIP OR PLACE OF ORGANIZATION

Cayman

Dicerna Pharmaceuticals Inc SC 13G/A