Board Diversity Matrix

**Board Diversity Matrix for Merrimack Pharmaceuticals (As of December 31, 2023)**
Total Number of Directors	5
	Female	Male	Non-Binary	Did Not Disclose Gender
Part I: Gender Identity
Directors	1	4	0	0
Part II: Demographic Background
African American or Black	0	0	0	0
Alaskan Native or American Indian	0	0	0	0
Asian	0	0	0	0
Hispanic or Latinx	0	0	0	0
Native Hawaiian or Pacific Islander	0	0	0	0
White	1	3	0	0
Two or More Races or Ethnicities	0	0	0	0
LGBTQ+			0
Did Not Disclose Demographic Background			1

**Board Diversity Matrix for Merrimack Pharmaceuticals (As of August 01, 2022)**
Total Number of Directors	5
	Female	Male	Non-Binary	Did Not Disclose Gender
Part I: Gender Identity
Directors	1	4	0	0
Part II: Demographic Background
African American or Black	0	0	0	0
Alaskan Native or American Indian	0	0	0	0
Asian	0	0	0	0
Hispanic or Latinx	0	0	0	0
Native Hawaiian or Pacific Islander	0	0	0	0
White	1	3	0	0
Two or More Races or Ethnicities	0	0	0	0
LGBTQ+			0
Did Not Disclose Demographic Background			1