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MATK - As of  04/30/25, 09:40:16 AM:   84 Insider Transactions.

Sector:    Industry:
Prev Close:$31.49  Avg Vol(3m): 1,068,340  P/E: 0.00  EPS: 0.00

Email this page to a friend.    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 0.0% view
S 2012-02-13 20:07:04.0 MARTEK BIOSCIENCES CORP MATK DIMENSIONAL FUND ADVISORS LP 0.0% view
B 2011-02-28 14:55:57.0 MARTEK BIOSCIENCES CORP MATK Royal DSM N 100.0% view
B 2011-02-14 22:00:12.0 MARTEK BIOSCIENCES CORP MATK PAULSON & CO INC 8.95% view
B 2011-02-11 14:06:08.0 MARTEK BIOSCIENCES CORP MATK DIMENSIONAL FUND ADVISORS LP 6.28% view
S 2011-02-10 07:00:47.0 MARTEK BIOSCIENCES CORP MATK VANGUARD GROUP INC 4.99% view
B 2011-02-07 09:07:02.0 MARTEK BIOSCIENCES CORP MATK BlackRock Inc 7.6% view
S 2010-02-12 16:01:20.0 MARTEK BIOSCIENCES CORP MATK FRIESS ASSOCIATES LLC n/a view
S 2010-02-09 16:00:22.0 MARTEK BIOSCIENCES CORP MATK STATE STREET BANK & TRUST CO 2.9% view
B 2010-02-05 11:49:17.0 MARTEK BIOSCIENCES CORP MATK VANGUARD GROUP INC 5.32% view
B 2009-02-17 07:01:41.0 MARTEK BIOSCIENCES CORP MATK FRIESS ASSOCIATES LLC n/a view
B 2008-07-31 15:21:02.0 MARTEK BIOSCIENCES CORP MATK STATE STREET BANK & TRUST CO 7.69% view
B 2008-02-13 18:10:03.0 MARTEK BIOSCIENCES CORP MATK LORD ABBETT & CO LLC 9.91% view
B 2008-02-13 12:34:34.0 MARTEK BIOSCIENCES CORP MATK PRICE T ROWE ASSOCIATES INC 8.8% view
S 2008-02-13 11:59:42.0 MARTEK BIOSCIENCES CORP MATK CAPITAL RESEARCH & MANAGEMENT CO 0.0% view
B 2008-02-05 17:28:54.0 MARTEK BIOSCIENCES CORP MATK BARCLAYS GLOBAL INVESTORS NA 2.94% view
B 2007-07-09 14:02:01.0 MARTEK BIOSCIENCES CORP MATK LORD ABBETT & CO LLC 5.6% view
B 2007-02-13 10:32:46.0 MARTEK BIOSCIENCES CORP MATK PRICE T ROWE ASSOCIATES INC 8.6% view
S 2007-02-09 17:40:51.0 MARTEK BIOSCIENCES CORP MATK CAPITAL RESEARCH & MANAGEMENT CO 7.8% view
S 2007-02-09 06:57:10.0 MARTEK BIOSCIENCES CORP MATK WADDELL & REED FINANCIAL INC 3.3% view
S 2006-04-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK FMR CORP n/a view
B 2006-02-14 00:00:00.0 MARTEK BIOSCIENCES CORP MATK PRICE T ROWE ASSOCIATES INC 7.2% view
B 2006-02-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK CAPITAL RESEARCH & MANAGEMENT CO 12.5% view
S 2006-02-01 00:00:00.0 MARTEK BIOSCIENCES CORP MATK WADDELL & REED FINANCIAL INC 5.9% view
B 2006-01-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK FMR CORP n/a view
B 2005-09-09 00:00:00.0 MARTEK BIOSCIENCES CORP MATK CAPITAL RESEARCH & MANAGEMENT CO 11.2% view
B 2005-02-08 00:00:00.0 MARTEK BIOSCIENCES CORP MATK WADDELL & REED FINANCIAL INC 6.1% view
S 2004-04-26 00:00:00.0 MARTEK BIOSCIENCES CORP MATK EASTBOURNE CAPITAL MANAGEMENT LLC 0.1% view
S 2004-02-20 00:00:00.0 MARTEK BIOSCIENCES CORP MATK ESSEX INVESTMENT MANAGEMENT CO LLC 8.02% view
S 2004-02-18 00:00:00.0 MARTEK BIOSCIENCES CORP MATK RS 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
S 2004-02-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK COLLEGE RETIREMENT EQUITIES FUND 0.7285% view
B 2004-02-02 00:00:00.0 MARTEK BIOSCIENCES CORP MATK ESSEX INVESTMENT MANAGEMENT CO LLC 8.02% view
S 2004-01-21 00:00:00.0 MARTEK BIOSCIENCES CORP MATK HAYWOOD GEORGE WEAVER 1.3% view
S 2003-04-17 00:00:00.0 MARTEK BIOSCIENCES CORP MATK EASTBOURNE CAPITAL MANAGEMENT LLC 14.86% view
S 2003-04-09 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 0.0% view
S 2003-02-14 00:00:00.0 MARTEK BIOSCIENCES CORP MATK COLLEGE RETIREMENT EQUITIES FUND 5.867% 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 EASTBOURNE CAPITAL MANAGEMENT LLC 16.1% view
S 2003-02-12 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 0.22% view
S 2003-01-28 00:00:00.0 MARTEK BIOSCIENCES CORP MATK HAYWOOD GEORGE WEAVER 5.4% view
B 2003-01-14 00:00:00.0 MARTEK BIOSCIENCES CORP MATK ESSEX INVESTMENT MANAGEMENT CO LLC 6.79% view
B 2002-11-04 00:00:00.0 MARTEK BIOSCIENCES CORP MATK EASTBOURNE CAPITAL MANAGEMENT LLC 16.3% view
S 2002-02-14 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 MASSACHUSETTS FINANCIAL SERVICES CO 3.8% 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 BANK OF AMERICA CORP 5.0% view
S 2002-02-08 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 10.94% view
S 2002-02-08 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 4.03% view
B 2002-02-01 00:00:00.0 MARTEK BIOSCIENCES CORP MATK EASTBOURNE CAPITAL MANAGEMENT LLC 10.95% view
B 2001-02-14 00:00:00.0 MARTEK BIOSCIENCES CORP MATK EASTBOURNE CAPITAL MANAGEMENT LLC 8.1% 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 COLLEGE RETIREMENT EQUITIES FUND 7.218% view
S 2001-02-12 00:00:00.0 MARTEK BIOSCIENCES CORP MATK BANK OF AMERICA CORP 7.29% view
B 2001-02-12 00:00:00.0 MARTEK BIOSCIENCES CORP MATK MASSACHUSETTS FINANCIAL SERVICES CO 6.3% view
S 2001-02-09 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 12.51% view
S 2001-02-02 00:00:00.0 MARTEK BIOSCIENCES CORP MATK H&Q HEALTHCARE INVESTORS 1.0% view
B 2000-02-15 00:00:00.0 MARTEK BIOSCIENCES CORP MATK BANK OF AMERICA CORP 9.27% view
B 2000-02-15 00:00:00.0 MARTEK BIOSCIENCES CORP MATK BANK OF AMERICA CORP 9.27% view
B 2000-02-14 00:00:00.0 MARTEK BIOSCIENCES CORP MATK HAYWOOD GEORGE WEAVER 8.0% view
S 2000-02-11 00:00:00.0 MARTEK BIOSCIENCES CORP MATK COLLEGE RETIREMENT EQUITIES FUND 7.783% view
B 2000-02-09 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 EASTBOURNE CAPITAL MANAGEMENT LLC 6.57% view
B 1999-06-09 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 6.1% view
B 1999-04-07 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 11.06% view
S 1999-02-12 00:00:00.0 MARTEK BIOSCIENCES CORP MATK H&Q HEALTHCARE INVESTORS 5.25% view
S 1999-02-11 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 PUTNAM INVESTMENTS INC 12.0% view
S 1999-02-02 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 10.12% view
B 1998-02-18 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 H&Q HEALTHCARE INVESTORS 5.47% view
S 1998-01-26 00:00:00.0 MARTEK BIOSCIENCES CORP MATK PUTNAM INVESTMENTS INC 12.0% view
B 1998-01-26 00:00:00.0 MARTEK BIOSCIENCES CORP MATK STATE OF WISCONSIN INVESTMENT BOARD 9.61% view
S 1997-07-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK PUTNAM INVESTMENTS INC 12.0% view
B 1997-05-15 00:00:00.0 MARTEK BIOSCIENCES CORP MATK H&Q HEALTHCARE INVESTORS 5.51% view
S 1997-02-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK COLLEGE RETIREMENT EQUITIES FUND 7.51% view
S 1997-01-30 00:00:00.0 MARTEK BIOSCIENCES CORP MATK PUTNAM INVESTMENTS INC 12.0% view
B 1996-02-07 00:00:00.0 MARTEK BIOSCIENCES CORP MATK PUTNAM INVESTMENTS INC 12.0% view
B 1996-02-07 00:00:00.0 MARTEK BIOSCIENCES CORP MATK COLLEGE RETIREMENT EQUITIES FUND 7.91% view
S 1995-02-10 00:00:00.0 MARTEK BIOSCIENCES CORP MATK OPPENHEIMER MANAGEMENT CORP 4.69% view
B 1994-02-08 00:00:00.0 MARTEK BIOSCIENCES CORP MATK OPPENHEIMER MANAGEMENT CORP 5.09% 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.