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MATK
- As of 05/16/24, 11:17:48 AM: 41 Insider Transactions.
Sector:
Industry:
Prev Close:
$31.49
Avg Vol(3m):
1,068,340
P/E:
0.00
EPS:
0.00
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Insider Transactions for MATK
Buy/Sell*
Filed Date
Subject
Symbol
Acquirer
Pct Owned
Details
B
2013-02-11 17:07:23.0
MARTEK BIOSCIENCES CORP
MATK
DIMENSIONAL FUND ADVISORS LP
100.0%
view
B
2011-02-14 22:00:12.0
MARTEK BIOSCIENCES CORP
MATK
DIMENSIONAL FUND ADVISORS LP
6.28%
view
B
2011-02-10 07:00:47.0
MARTEK BIOSCIENCES CORP
MATK
BlackRock Inc
7.6%
view
S
2010-02-12 16:01:20.0
MARTEK BIOSCIENCES CORP
MATK
STATE STREET BANK & TRUST CO
2.9%
view
B
2010-02-05 11:49:17.0
MARTEK BIOSCIENCES CORP
MATK
FRIESS ASSOCIATES LLC
n/a
view
B
2008-07-31 15:21:02.0
MARTEK BIOSCIENCES CORP
MATK
LORD ABBETT & CO LLC
9.91%
view
S
2008-02-13 12:34:34.0
MARTEK BIOSCIENCES CORP
MATK
CAPITAL RESEARCH & MANAGEMENT CO
0.0%
view
B
2008-02-05 17:28:54.0
MARTEK BIOSCIENCES CORP
MATK
LORD ABBETT & CO LLC
5.6%
view
S
2007-02-13 10:32:46.0
MARTEK BIOSCIENCES CORP
MATK
CAPITAL RESEARCH & MANAGEMENT CO
7.8%
view
S
2007-02-09 06:57:10.0
MARTEK BIOSCIENCES CORP
MATK
FMR CORP
n/a
view
B
2006-02-14 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
CAPITAL RESEARCH & MANAGEMENT CO
12.5%
view
B
2006-02-01 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
FMR CORP
n/a
view
S
2005-09-09 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
WADDELL & REED FINANCIAL INC
0.1%
view
S
2004-02-20 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
ESSEX INVESTMENT MANAGEMENT CO LLC
0.9%
view
S
2004-02-12 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
EASTBOURNE CAPITAL MANAGEMENT LLC
12.0%
view
B
2004-02-02 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
ESSEX INVESTMENT MANAGEMENT CO LLC
8.02%
view
S
2003-04-17 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
STATE OF WISCONSIN INVESTMENT BOARD
0.0%
view
B
2003-02-14 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
RS INVESTMENT MANAGEMENT CO LLC
5.1%
view
S
2003-02-13 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
STATE OF WISCONSIN INVESTMENT BOARD
0.22%
view
B
2003-01-28 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
HAYWOOD GEORGE WEAVER
6.79%
view
S
2002-11-04 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
COLLEGE RETIREMENT EQUITIES FUND
7.005%
view
S
2002-02-11 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
HAYWOOD GEORGE WEAVER
5.7%
view
S
2002-02-08 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
STATE OF WISCONSIN INVESTMENT BOARD
10.94%
view
B
2002-02-08 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
EASTBOURNE CAPITAL MANAGEMENT LLC
10.95%
view
S
2001-02-14 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
HAYWOOD GEORGE WEAVER
6.7%
view
S
2001-02-13 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
BANK OF AMERICA CORP
7.29%
view
S
2001-02-12 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
STATE OF WISCONSIN INVESTMENT BOARD
12.51%
view
B
2001-02-02 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
H&Q HEALTHCARE INVESTORS
9.27%
view
B
2000-02-15 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
HAYWOOD GEORGE WEAVER
8.0%
view
B
2000-02-11 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
STATE OF WISCONSIN INVESTMENT BOARD
13.4%
view
B
2000-01-26 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
HAYWOOD GEORGE WEAVER
6.1%
view
B
1999-06-09 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
HAYWOOD GEORGE WEAVER
11.06%
view
S
1999-02-12 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
COLLEGE RETIREMENT EQUITIES FUND
8.807%
view
S
1999-02-09 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
STATE OF WISCONSIN INVESTMENT BOARD
8.9%
view
B
1999-01-12 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
NATIONSBANK CORP
7.18%
view
B
1998-02-12 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
COLLEGE RETIREMENT EQUITIES FUND
9.249%
view
S
1998-02-10 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
PUTNAM INVESTMENTS INC
12.0%
view
S
1998-01-26 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
PUTNAM INVESTMENTS INC
12.0%
view
S
1997-05-15 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
COLLEGE RETIREMENT EQUITIES FUND
7.51%
view
B
1997-01-30 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
PUTNAM INVESTMENTS INC
12.0%
view
S
1996-02-07 00:00:00.0
MARTEK BIOSCIENCES CORP
MATK
OPPENHEIMER MANAGEMENT CORP
4.69%
view
* Institutions do not report transaction buy/sell types directly. To help members better understand the transactions, this column is filled by InsiderCow's best-effort interpretations.