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ESSEX INVESTMENT MANAGEMENT CO INC
- As of  04/27/24, 11:56:10 PM:   69 Insider Transactions.

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Buy/Sell* 1 Yr Return** Filed Date Subject Symbol Pct Owned Details
B 2012-06-08 16:48:17.0 Crumbs Bake Shop n/a 17.39% view
B 221.13% 2010-01-25 16:31:51.0 LECROY CORP LCRY 6.76% view
B -10.76% 2010-01-25 16:07:30.0 TRANSCEND SERVICES INC TRCR 7.42% view
B -60.47% 2008-01-31 10:05:44.0 TRANSCEND SERVICES INC TRCR 6.16% view
B -21.21% 2008-01-31 10:04:32.0 LECROY CORP LCRY 5.92% view
B -8.13% 2006-04-24 00:00:00.0 CYNOSURE INC CYNO 9.13% view
S 2006-02-09 00:00:00.0 MWI Veterinary Supply MWIV 5.59% view
B 32.88% 2005-05-11 00:00:00.0 MARCHEX INC MCHX 4.81% view
B 0.63% 2005-05-11 00:00:00.0 JUPITERMEDIA CORP JUPM 5.42% view
B 22.72% 2005-04-19 00:00:00.0 CITADEL SECURITY SOFTWARE INC MCRS 5.78% view
B 61.88% 2005-04-19 00:00:00.0 MICROS SYSTEMS INC CWTR 6.38% view
B 2005-04-19 00:00:00.0 COLDWATER CREEK INC CPTV 9.98% view
S 2004-04-12 00:00:00.0 MCDATA CORP MCDT 8.49% view
S 2004-02-20 00:00:00.0 CACHE INC MATK 8.02% view
S 2004-02-20 00:00:00.0 MICROMUSE INC MRTN 8.83% view
S 2004-02-20 00:00:00.0 INTRADO INC MSTR 5.34% view
S 2004-02-20 00:00:00.0 MERIX CORP MCDT 11.17% view
S 2004-02-20 00:00:00.0 COLDWATER CREEK INC CWTR 5.91% view
B -37.21% 2004-02-20 00:00:00.0 QUEST SOFTWARE INC QSFT 5.51% view
S 2004-02-02 00:00:00.0 MARTEK BIOSCIENCES CORP MATK 6.27% view
B 2004-02-02 00:00:00.0 MARTEN TRANSPORT LTD MRTN 6.42% view
B -65.23% 2004-02-02 00:00:00.0 MICROSTRATEGY INC MSTR 7.14% view
B 84.14% 2004-02-02 00:00:00.0 MCDATA CORP MCDT 5.61% view
B -16.66% 2004-02-02 00:00:00.0 MAGMA DESIGN AUTOMATION INC LAVA 6.03% view
S 2003-01-14 00:00:00.0 MARTEK BIOSCIENCES CORP OSIS 9.02% view
S 2003-01-14 00:00:00.0 MCDATA CORP OSIS 11.28% view
S 2002-11-07 00:00:00.0 OSI SYSTEMS INC OSIS 14.2% view
S 2002-09-05 00:00:00.0 OSI SYSTEMS INC OSIS 13.54% view
B -0.97% 2002-08-16 00:00:00.0 OSI SYSTEMS INC OSIS 14.11% view
B -37.05% 2002-08-15 00:00:00.0 OSI SYSTEMS INC OSIS 13.97% view
S 2002-03-08 00:00:00.0 AMERICAN SCIENCE & ENGINEERING INC OSIS 13.41% view
B -15.99% 2002-02-11 00:00:00.0 AMERICAN SCIENCE & ENGINEERING INC OSIS 13.55% view
B 4.64% 2002-01-10 00:00:00.0 VIISAGE TECHNOLOGY INC CPKI 5.65% view
B 2002-01-10 00:00:00.0 SPECIALTY LABORATORIES ASE 14.57% view
B -1.15% 2002-01-10 00:00:00.0 WEBSENSE INC OSIS 13.2% view
B -0.93% 2001-11-14 00:00:00.0 MED SRZ 5.94% view
B -55.80% 2001-02-14 00:00:00.0 PECO II INC cphd 9.23% view
B -60.85% 2000-05-10 00:00:00.0 ESPEED INC ESPD 16.93% view
B -25.77% 2000-02-14 00:00:00.0 ESPEED INC MIPS 6.43% view
B -81.43% 2000-02-02 00:00:00.0 Z TEL TECHNOLOGIES INC NTPA 6.66% view
B -66.21% 2000-02-02 00:00:00.0 MICROMUSE INC DGIN 7.63% view
S 2000-01-10 00:00:00.0 RAVISENT TECHNOLOGIES INC NTOP 11.69% view
B 2000-01-10 00:00:00.0 ESPEED INC XEDA 12.22% view
S 1999-12-15 00:00:00.0 NET2PHONE INC XEDA 10.11% view
S 1999-10-12 00:00:00.0 RAVISENT TECHNOLOGIES INC XEDA 11.35% view
B 1999-09-10 00:00:00.0 RAVISENT TECHNOLOGIES INC XEDA 11.35% view
B 1999-02-05 00:00:00.0 BRIGHT HORIZONS FAMILY SOLUTIONS INC BFAM 8.61% view
S 1999-01-08 00:00:00.0 ADVANTAGE LEARNING SYSTEMS INC RLRN 10.08% view
S 1999-01-08 00:00:00.0 DIGITAL RIVER INC DRIV 10.89% view
B -30.69% 1998-12-11 00:00:00.0 MICROMUSE INC MUSE 11.28% view
B -29.98% 1998-11-09 00:00:00.0 BRIGHT HORIZONS FAMILY SOLUTIONS INC BFAM 11.26% view
S 1998-09-10 00:00:00.0 BRIGHT HORIZONS FAMILY SOLUTIONS INC BFAM 11.23% view
B -27.35% 1998-08-10 00:00:00.0 EVOLVING SYSTEMS INC EVOL 12.62% view
B -55.02% 1998-07-08 00:00:00.0 RIT TECHNOLOGIES LTD RITT 10.58% view
B -88.51% 1998-06-09 00:00:00.0 RIT TECHNOLOGIES LTD RITT 12.23% view
B 1998-01-29 00:00:00.0 RIT TECHNOLOGIES LTD RITT 5.11% view
B 100.00% 1998-01-29 00:00:00.0 RADIANT SYSTEMS INC RADS 7.61% view
S 1998-01-29 00:00:00.0 OMTOOL LTD OMTL 8.38% view
S 1998-01-29 00:00:00.0 NATURAL MICROSYSTEMS CORP NMSS 6.77% view
S 1998-01-29 00:00:00.0 COMPUTER TASK GROUP INC CTG 10.18% view
S 1997-08-13 00:00:00.0 I STAT CORPORATION STAT 10.2% view
B 1997-07-10 00:00:00.0 METZLER GROUP INC NCI 5.92% view
B -66.48% 1997-03-10 00:00:00.0 HARMONIC LIGHTWAVES INC HLIT 6.16% view
S 1997-01-10 00:00:00.0 COMPUTER HORIZONS CORP CHRZ 12.19% view
B 1997-01-10 00:00:00.0 PUMA TECHNOLOGY INC PUMA 7.94% view
B -2.82% 1997-01-10 00:00:00.0 DIGITAL MICROWAVE CORP STXN 4.08% view
B 1997-01-10 00:00:00.0 CITRIX SYSTEMS INC PTEK 3.21% view
B 1997-01-10 00:00:00.0 SEROLOGICALS CORP SERO 8.94% view
B 1996-12-11 00:00:00.0 HARMONIC LIGHTWAVES INC AMXC n/a 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.
** Since most institutions are long investors, only returns for long transactions are shown here.