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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1274792	Merrimack Pharmaceuticals Inc	MACK	()	UT

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1094201	L Gary Crocker	C/O Merrimack Pharmaceuticals, Inc. One Broadway 14Th Floor Cambridge MA 02142	See Remarks	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2022-03-11	5,000	$6.08	94,828	No	4	P	Indirect	See footnote
Common Stock	Acquisiton	2022-03-14	5,000	$6.02	99,828	No	4	P	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See footnote
No	4	P	Indirect	See footnote

Footnotes

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.00 to $6.17, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4.
Shares held by Crocker Family Investments, LLC, over which Reporting Person is the Managing Member.
The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.90 to $6.21, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.