Institutional Ownership Merrimack Pharmaceuticals Inc (MACK)
This table provides information about the institutional ownership of Merrimack Pharmaceuticals Inc (MACK). We have compiled data on the 1 institutions that hold shares in the stock, with a total of 24,500 shares, which have been reported (via 13F filing form) to have a value of $370,000.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Massmutual Trust CO Fsb
|
Oct 22, 2025 Q3 2025 |
24,500
shares
|
$370,685
0.01% of portfolio
|
Q4 2024
New holding
|