0000902219-15-000154.txt : 20150212 0000902219-15-000154.hdr.sgml : 20150212 20150212104405 ACCESSION NUMBER: 0000902219-15-000154 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20150212 DATE AS OF CHANGE: 20150212 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Dicerna Pharmaceuticals Inc CENTRAL INDEX KEY: 0001399529 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-87866 FILM NUMBER: 15603067 BUSINESS ADDRESS: STREET 1: 480 ARSENAL ST. BUILDING 1, SUITE 120 CITY: WATERTOWN STATE: MA ZIP: 02472 BUSINESS PHONE: 617 621 8097 MAIL ADDRESS: STREET 1: 480 ARSENAL ST. BUILDING 1, SUITE 120 CITY: WATERTOWN STATE: MA ZIP: 02472 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: WELLINGTON MANAGEMENT GROUP LLP CENTRAL INDEX KEY: 0000902219 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 042683227 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 280 CONGRESS STREET CITY: BOSTON STATE: MA ZIP: 02210 BUSINESS PHONE: 6179515000 MAIL ADDRESS: STREET 1: 280 CONGRESS STREET CITY: BOSTON STATE: MA ZIP: 02210 FORMER COMPANY: FORMER CONFORMED NAME: WELLINGTON MANAGEMENT CO LLP DATE OF NAME CHANGE: 19960930 FORMER COMPANY: FORMER CONFORMED NAME: WELLINGTON MANAGEMENT CO DATE OF NAME CHANGE: 19930426 SC 13G 1 SEC13G_Filing.htm SEC SCHEDULE 13G

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. _ )*

            

Dicerna Pharmaceuticals, Inc.


(Name of Issuer)

Common Stock


(Title of Class of Securities)

253031108


(CUSIP Number)

December 31, 2014


(Date of Event Which Requires Filing of this Statement)

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

[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in 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 (the "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

1. NAMES OF REPORTING PERSONS

Wellington Management Group LLP
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) [ ]
(b) [ ]
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION

Massachusetts

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5. SOLE VOTING POWER 0
6. SHARED VOTING POWER 1,370,002
7. SOLE DISPOSITIVE POWER 0
8. SHARED DISPOSITIVE POWER 1,515,302
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,515,302
10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

[ ]
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

8.53%
12. TYPE OF REPORTING PERSON

IA*
*On Effective January 1, 2015, Wellington Management Company, LLP, a registered investment advisor, changed its name to Wellington Management Group LLP (“Wellington Management Group”) and transferred its United Stated advisory business to Wellington Management Company LLP, a Delaware limited liability partnership. On that date, Wellington Management Company LLP registered as an investment adviser with the SEC by succeeding to Wellington Management Group’s SEC registration (No. 801-15908).

Item 1.
(a) Name of Issuer
Dicerna Pharmaceuticals, Inc.
(b) Address of Issuer's Principal Executive Offices
480 Arsenal Street
Building 1, Suite 120
Watertown, MA 02472
Item 2.
(a) Name of Person Filing
Wellington Management Group LLP
(b) Address of Principal Business Office or, if None, Residence
c/o Wellington Management Company LLP
280 Congress Street
Boston, MA 02210
(c) Citizenship
Massachusetts
(d) Title of Class of Securities
Common Stock
(e) CUSIP Number
253031108
Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:
(a) [ ] Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o).
(b) [ ] Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c).
(c) [ ] Insurance Company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c).
(d) [ ] Investment Company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
(e) [X] An investment adviser in accordance with Rule 240.13d-1(b)(1)(ii)(E);
(f) [ ] An employee benefit plan or endowment fund in accordance with Rule 240.13d-1(b)(1)(ii)(F);
(g) [ ] A parent holding company or control person in accordance with Rule 240.13d-1(b)(1)(ii)(G);
(h) [ ] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i) [ ] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c), check this box [ ]
Item 4. Ownership.
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
(a) Amount Beneficially Owned:
1,515,302
(b) Percent of Class:
8.53%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote 0
(ii) shared power to vote or to direct the vote 1,370,002
(iii) sole power to dispose or to direct the disposition of 0
(iv) shared power to dispose or to direct the disposition of 1,515,302
Item 5. Ownership of Five Percent or Less of Class.
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [ ]
Item 6. Ownership of More than Five Percent on Behalf of Another Person.
The securities as to which this Schedule is filed are owned of record by clients of one or more investment advisers directly or indirectly owned by Wellington Management Group LLP, formerly known as Wellington Management Company, LLP, which was an investment adviser to these clients as of December 31, 2014. Those clients have the right to receive, or the power to direct the receipt of, dividends from, or the proceeds from the sale of, such securities. No such client is known to have such right or power with respect to more than five percent of this class of securities, except as follows:

Not Applicable.
Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.

Not Applicable.
Item 8. Identification and Classification of Members of the Group.

Not Applicable.
Item 9. Notice of Dissolution of Group.

Not Applicable.
Item 10. Certification.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

By: Wellington Management Group LLP
By: /s/ Steven M. Hoffman
Name: Steven M. Hoffman
Title: Authorized Person
Date: February 12, 2015