SEC Form 4 · accession 0001179110-15-005207

MERRIMACK PHARMACEUTICALS INC · MACK

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — Head of Discovery

Period of report

Mar 16, 2015

Accepted (ET)

Mar 18, 2015 · 8:53 pm EDT

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001274792

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock	Mar 16, 2015	M	20,000	$1.71	A	23,600	D
Common Stock	Mar 16, 2015	M	897	$1.81	A	24,497	D
Common Stock	Mar 16, 2015	S	20,897	$12.00	D	3,600	D
Common Stock	Mar 17, 2015	M	10,000	$1.71	A	13,600	D
Common Stock	Mar 17, 2015	M	11,337	$1.81	A	24,937	D
Common Stock	Mar 17, 2015	S	21,337	$12.00	D	3,600	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Option (right to buy)^F2	$1.71	Mar 16, 2015	M	20,000	D	—	Aug 3, 2015	Common Stock	20,000	10,000	D
Stock Option (right to buy)^F2	$1.81	Mar 16, 2015	M	897	D	—	Sep 22, 2018	Common Stock	897	11,337	D
Stock Option (right to buy)^F2	$1.71	Mar 17, 2015	M	10,000	D	—	Aug 3, 2015	Common Stock	10,000	0	D
Stock Option (right to buy)^F2	$1.81	Mar 17, 2015	M	11,337	D	—	Sep 22, 2018	Common Stock	11,337	0	D