0001179110-15-012355.txt : 20150819 0001179110-15-012355.hdr.sgml : 20150819 20150819160921 ACCESSION NUMBER: 0001179110-15-012355 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20150817 FILED AS OF DATE: 20150819 DATE AS OF CHANGE: 20150819 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MERRIMACK PHARMACEUTICALS INC CENTRAL INDEX KEY: 0001274792 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: ONE KENDALL SQUARE STREET 2: SUITE B7201 CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 617-441-1000 MAIL ADDRESS: STREET 1: ONE KENDALL SQUARE STREET 2: SUITE B7201 CITY: CAMBRIDGE STATE: MA ZIP: 02139 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Stewart Edward J. CENTRAL INDEX KEY: 0001531564 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-35409 FILM NUMBER: 151064155 MAIL ADDRESS: STREET 1: MERRIMACK PHARMACEUTICALS, INC. STREET 2: ONE KENDALL SQUARE, SUITE B7201 CITY: CAMBRIDGE STATE: MA ZIP: 02139 4 1 edgar.xml FORM 4 - X0306 4 2015-08-17 0 0001274792 MERRIMACK PHARMACEUTICALS INC MACK 0001531564 Stewart Edward J. C/O MERRIMACK PHARMACEUTICALS, INC. ONE KENDALL SQUARE, SUITE B7201 CAMBRIDGE MA 02139 0 1 0 0 Head of Commercial Common Stock 2015-08-17 4 M 0 6000 1.81 A 27385 D Common Stock 2015-08-17 4 S 0 6000 10.49 D 21385 D Stock Option (right to buy) 1.81 2015-08-17 4 M 0 6000 0 D 2018-09-22 Common Stock 6000 35000 D This transaction was effected pursuant to a Rule 10b5-1 trading plan. This option is fully vested. /s/ Jeffrey A. Munsie, attorney-in-fact 2015-08-19