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ESSEX INVESTMENT MANAGEMENT CO INC
- As of  06/06/24, 03:18:41 PM:   69 Insider Transactions.

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Buy/Sell* 1 Yr Return** Filed Date Subject Symbol Pct Owned Details
B 24.25% 2012-06-08 16:48:17.0 Crumbs Bake Shop CRMB 10.8% view
B 221.13% 2010-01-25 16:31:51.0 GSE SYSTEMS INC GVP 6.76% view
B -10.76% 2010-01-25 16:10:24.0 AMTECH SYSTEMS INC TRCR 7.42% view
B 4.84% 2010-01-25 16:05:09.0 TRANSCEND SERVICES INC TRCR 6.16% view
B -74.70% 2008-01-31 10:05:02.0 LECROY CORP LCRY 5.92% view
S 2007-02-06 08:37:34.0 INTERACTIVE INTELLIGENCE INC CYNO 9.13% view
B 29.97% 2006-02-09 00:00:00.0 CYNOSURE INC MWIV 5.63% view
B 32.88% 2006-02-09 00:00:00.0 MARCHEX INC MCHX 7.045% view
B 0.63% 2005-05-11 00:00:00.0 MARCHEX INC JUPM 3.37% view
B -55.56% 2005-05-11 00:00:00.0 JUPITERMEDIA CORP cdss 5.04% view
B 22.72% 2005-04-19 00:00:00.0 MICROS SYSTEMS INC MCRS 4.0% view
S 2005-04-19 00:00:00.0 COLDWATER CREEK INC CWTR 2.78% view
S 2005-04-19 00:00:00.0 CAPTIVA SOFTWARE CORP MCDT 10.967% view
S 2004-04-12 00:00:00.0 MCDATA CORP CACH 5.51% view
S 2004-02-20 00:00:00.0 MICROMUSE INC MUSE 6.27% view
S 2004-02-20 00:00:00.0 INTRADO INC TRDO 6.42% view
S 2004-02-20 00:00:00.0 MERIX CORP MERX 7.14% view
S 2004-02-20 00:00:00.0 COLDWATER CREEK INC CWTR 5.61% view
S 2004-02-20 00:00:00.0 QUEST SOFTWARE INC QSFT 6.03% view
B -17.50% 2004-02-02 00:00:00.0 MARTEK BIOSCIENCES CORP MATK 8.02% view
B 32.91% 2004-02-02 00:00:00.0 MARTEN TRANSPORT LTD MRTN 8.83% view
B 19.52% 2004-02-02 00:00:00.0 MICROSTRATEGY INC MSTR 5.34% view
B -51.87% 2004-02-02 00:00:00.0 MCDATA CORP MCDT 11.17% view
B -51.82% 2004-02-02 00:00:00.0 MAGMA DESIGN AUTOMATION INC LAVA 5.91% view
B 151.88% 2004-02-02 00:00:00.0 MARTEK BIOSCIENCES CORP MATK 6.79% view
B 0.11% 2003-01-14 00:00:00.0 MCDATA CORP MCDT 6.88% view
B 19.03% 2002-12-09 00:00:00.0 OSI SYSTEMS INC OSIS 15.0% view
B 0.52% 2002-10-15 00:00:00.0 OSI SYSTEMS INC OSIS 14.34% 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 OSI SYSTEMS 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 CALIFORNIA PIZZA KITCHEN INC CPKI 5.65% view
B 2002-01-10 00:00:00.0 AMERICAN SCIENCE & ENGINEERING INC 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 SUNRISE ASSISTED LIVING INC SRZ 5.94% view
B -55.80% 2001-02-14 00:00:00.0 CEPHEID 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 MIPS TECHNOLOGIES INC MIPS 6.43% view
B -81.43% 2000-02-02 00:00:00.0 NETOPIA INC NTPA 6.66% view
B -66.21% 2000-02-02 00:00:00.0 DIGITAL INSIGHT CORP DGIN 7.63% view
S 2000-01-10 00:00:00.0 NET2PHONE INC NTOP 11.69% view
B 2000-01-10 00:00:00.0 RAVISENT TECHNOLOGIES INC XEDA 12.22% view
S 1999-12-15 00:00:00.0 RAVISENT TECHNOLOGIES INC XEDA 10.11% view
S 1999-10-12 00:00:00.0 NET2PHONE INC NTOP 11.35% view
B 1999-09-10 00:00:00.0 NET2PHONE INC NTOP 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 BFAM 11.28% view
B -29.98% 1998-11-09 00:00:00.0 BRIGHT HORIZONS FAMILY SOLUTIONS INC BFAM 12.87% view
S 1998-09-10 00:00:00.0 BRIGHT HORIZONS FAMILY SOLUTIONS INC RITT 11.23% view
B -27.35% 1998-08-10 00:00:00.0 EVOLVING SYSTEMS INC BFAM 12.62% view
B -55.02% 1998-07-08 00:00:00.0 RIT TECHNOLOGIES LTD EVOL 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 BTIM 5.11% view
B 100.00% 1998-01-29 00:00:00.0 RADIANT SYSTEMS INC OSTE 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 METZLER GROUP INC NCI 6.77% view
S 1998-01-29 00:00:00.0 METZLER GROUP INC NCI 10.18% view
S 1997-08-13 00:00:00.0 METZLER GROUP INC NCI 10.2% view
B 1997-07-10 00:00:00.0 ALPHA 1 BIOMEDICALS INC RGRX 5.92% view
B -66.48% 1997-03-10 00:00:00.0 HARMONIC LIGHTWAVES INC CYMI 6.16% view
S 1997-01-10 00:00:00.0 COMPUTER HORIZONS CORP HLIT 12.19% view
B 1997-01-10 00:00:00.0 PUMA TECHNOLOGY INC VRTY 7.94% view
B -2.82% 1997-01-10 00:00:00.0 DIGITAL MICROWAVE CORP GENR 4.08% view
B 1997-01-10 00:00:00.0 PREMIERE TECHNOLOGIES INC PTEK 3.21% view
B 1997-01-10 00:00:00.0 SEROLOGICALS CORP SERO 5.53% view
B -35.02% 1996-12-11 00:00:00.0 HARMONIC LIGHTWAVES INC HLIT 13.31% 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.