SIMPLEX TRADING, LLC - MERRIMACK PHARMACEUTICALS IN ownership

MERRIMACK PHARMACEUTICALS IN's ticker is MACKXXXX and the CUSIP is 590328100. A total of 138 filers reported holding MERRIMACK PHARMACEUTICALS IN in Q4 2016. The put-call ratio across all filers is 2.24 and the average weighting 0.1%.

Quarter-by-quarter ownership
SIMPLEX TRADING, LLC ownership history of MERRIMACK PHARMACEUTICALS IN
ValueSharesWeighting
Q2 2017$153,000
+23.4%
124,036
+207.0%
0.01%
+40.0%
Q1 2017$124,000
-50.4%
40,402
-34.1%
0.01%
-66.7%
Q4 2016$250,000
-46.8%
61,304
-17.3%
0.02%
-53.1%
Q3 2016$470,000
+1205.6%
74,116
+984.2%
0.03%
+1500.0%
Q2 2016$36,000
-42.9%
6,836
-10.6%
0.00%
-60.0%
Q1 2016$63,000
-37.6%
7,644
-40.4%
0.01%
-37.5%
Q4 2015$101,000
+29.5%
12,824
+102.1%
0.01%
+14.3%
Q2 2015$78,0006,3460.01%
Other shareholders
MERRIMACK PHARMACEUTICALS IN shareholders Q4 2016
NameSharesValueWeighting ↓
DAFNA Capital Management LLC 514,853$2,595,0002.23%
GARRISON BRADFORD & ASSOCIATES INC 98,001$494,0000.48%
Catalyst Capital Advisors LLC 380,896$1,920,0000.44%
Knoll Capital Management, LLC 160,585$809,0000.42%
Tekla Capital Management LLC 757,050$3,816,0000.38%
FULLER & THALER ASSET MANAGEMENT, INC. 524,800$2,645,0000.13%
Integre Asset Management, LLC 103,493$522,0000.12%
CAMBRIDGE TRUST CO 220,003$1,109,0000.10%
JAMISON EATON & WOOD INC /NJ 62,782$316,0000.09%
STONERIDGE INVESTMENT PARTNERS LLC 88,304$445,0000.09%
View complete list of MERRIMACK PHARMACEUTICALS IN shareholders