Merrimack Pharmaceuticals Inc (NASDAQ:MACK)

11.80
Delayed Data
As of May 29
 -0.12 / -1.01%
Today’s Change
5.53
Today|||52-Week Range
13.84
+4.42%
Year-to-Date
Institutional investors purchased a net $11.2 million shares of MACK during the quarter ended March 2015, and now own 64.53% of the total float, a percentage that is typical for companies in the Biotechnology industry.
Individual stakeholders8.49%
Mutual fund holders40.82%
Other institutional23.71%

Largest Quarterly Institutional
Transactions

Latest Institutional Activity

3/31/2015WESTFIELD CAPITAL MANAGEMENT CO....  Bought 2.9 Million shares of Merrimack Pharmaceuticals...
3/31/2015TIAA-CREF INVESTMENT MANAGEMENT ...  Bought 2.1 Million shares of Merrimack Pharmaceuticals...
3/31/2015THE VANGUARD GROUP, INC.  Bought 2.1 Million shares of Merrimack Pharmaceuticals...

Top 10 Owners of Merrimack Pharmaceuticals Inc

StockholderStakeShares
owned
Total value ($)Shares
bought / sold
Total
change
Fidelity Management & Research Co...14.61%16,073,152178,411,987+256,832+1.62%
The Vanguard Group, Inc.7.91%8,707,05496,648,299+2,090,625+31.60%
BlackRock Fund Advisors6.73%7,401,03282,151,455+816,018+12.39%
SSgA Funds Management, Inc.3.15%3,465,43038,466,273+257,024+8.01%
Westfield Capital Management Co. ...2.64%2,903,55932,229,505+2,903,559--
TIAA-CREF Investment Management L...2.34%2,577,41428,609,295+2,140,644+490.11%
Lagoda Investment Management LP1.76%1,931,87221,443,779+371,342+23.80%
Deutsche Asset & Wealth Managemen...1.63%1,788,53519,852,739-149,902-7.73%
Teachers Advisors, Inc.1.02%1,124,53612,482,350+985,445+708.49%
Northern Trust Investments, Inc.1.02%1,118,74812,418,103+33,264+3.06%

Top 10 Mutual Funds Holding Merrimack Pharmaceuticals Inc

Mutual fundStakeShares
owned
Total value ($)Shares
bought / sold
Total
change
Fidelity Growth Company Fund7.48%8,233,38591,390,574-75,506-0.91%
Fidelity Series Growth Company Fu...2.21%2,427,60026,946,36000.00%
CREF Stock Account1.80%1,984,55122,028,516+336,776+20.44%
SPDR S&P Biotech ETF1.76%1,939,84321,532,257+88,752+4.79%
Vanguard Small Cap Index Fund1.60%1,760,76619,544,503+22,874+1.32%
Vanguard Total Stock Market Index...1.52%1,675,53118,598,394+17,400+1.05%
Vanguard Strategic Equity Fund1.47%1,616,40017,942,040+1,409,700+682.00%
Fidelity Blue Chip Growth Fund1.45%1,594,65817,700,70400.00%
iShares Russell 2000 ETF1.44%1,588,80417,635,724-96,459-5.72%
iShares Nasdaq Biotechnology ETF1.24%1,359,86715,094,524+24,556+1.84%

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