$Merrimack Pharmaceuticals (MACK.US)$ Director Andersen Eric purchased 49,550 shares of Common Stocks on Dec 26, 28, 2023 at an average price of $13.1535 for a total value of $651.75K.
This transaction involves other related parties: Western Standard LLC, WESTERN STANDARD PARTNERS LP and Western Standard Partners QP, L.P..
What is statement of changes in beneficial ownership of securities?
It is a requirement under federal securities laws that mandates individuals, including officers, directors, and those who hold more than 10% of any class of a company's securities (collectively known as "insiders"), to report their purchases, sales, and holdings of their company's securities by submitting Forms 3, 4, and 5.