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WESTFIELD CAPITAL MANAGEMENT CO LLC
- As of  10/23/26, 11:06:10 AM:   192 Insider Transactions.

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Buy/Sell* 1 Yr Return** Filed Date Subject Symbol Pct Owned Details
B 2020-01-07 11:41:54.0 MEDICINES CO MDCO 100.0% view
S 2019-09-04 13:59:51.0 Correvio Pharma Corp CRME 12.21% view
B 2019-02-07 07:03:51.0 Correvio Pharma Corp CRME 13.27% view
S 2018-05-02 07:51:52.0 Cardiome Pharma Corp CRME 12.62% view
S 2017-12-07 18:32:24.0 Cardiome Pharma Corp CRME 14.59% view
S 2017-08-08 11:23:17.0 Cardiome Pharma Corp CRME 0.0% view
S 2017-04-07 18:31:30.0 Huron Consulting Group Inc HURN 0.0% view
S 2017-04-07 15:21:54.0 ARIAD PHARMACEUTICALS INC CRME 15.93% view
S 2017-02-10 10:52:26.0 MERRIMACK PHARMACEUTICALS INC RUSHB 2.78% view
S 2017-02-10 10:50:55.0 ARIAD PHARMACEUTICALS INC XPO 0.0% view
S 2017-02-10 10:49:24.0 SUPERIOR ENERGY SERVICES INC SPN 0.0% view
S 2017-02-10 10:47:41.0 Cardiome Pharma Corp CRME 17.01% view
B 2016-02-10 17:01:29.0 RUSH ENTERPRISES INC RUSHB 5.38% view
B 2016-02-10 16:59:58.0 MERRIMACK PHARMACEUTICALS INC MACK 6.28% view
S 2016-02-09 20:05:19.0 ARIAD PHARMACEUTICALS INC AMAG 5.26% view
S 2016-02-09 20:03:32.0 Cardiome Pharma Corp MWIV 0.0% view
S 2016-02-05 17:06:13.0 DYNAVAX TECHNOLOGIES CORP AEGR 0.0% view
B 2015-11-09 12:05:00.0 Cardiome Pharma Corp CRME 16.4% view
B 2015-08-07 16:12:26.0 Cardiome Pharma Corp CRME 16.01% view
B 2015-06-09 17:17:40.0 Cardiome Pharma Corp CRME 13.34% view
B 2015-03-06 13:08:54.0 Cardiome Pharma Corp WMGI 5.4% view
B 2015-02-09 19:57:08.0 Nuance Communications NUAN 6.24% view
B 2015-02-09 19:51:01.0 DYNAVAX TECHNOLOGIES CORP ARTC 9.4% view
B 2015-02-09 19:47:43.0 Cardiome Pharma Corp CRME 9.69% view
B 2014-11-07 19:38:38.0 Aegerion Pharmaceuticals AEGR 11.76% view
S 2014-07-09 18:30:55.0 Aegerion Pharmaceuticals ARTC 9.4% view
S 2014-02-07 10:20:45.0 ORTHOFIX INTERNATIONAL N V TLYS 0.0% view
S 2014-02-07 09:18:29.0 TITAN INTERNATIONAL INC TWI 0.0% view
S 2014-02-07 09:16:32.0 PALOMAR MEDICAL TECHNOLOGIES LLC PMTI 3.73% view
S 2014-02-07 09:14:32.0 Huron Consulting Group Inc HURN 3.08% view
S 2014-02-07 09:10:56.0 FXCM Inc n/a 0.0% view
S 2014-02-07 09:05:14.0 ATMI INC ATMI 0.0% view
B 42.85% 2013-11-07 16:10:20.0 ARTHROCARE CORP ARTC 11.16% view
B 50.47% 2013-02-08 10:40:26.0 SKILLED HEALTHCARE GROUP INC n/a 7.77% view
S 2013-02-08 10:17:22.0 TILLY TLYS 4.63% view
B 36.82% 2013-02-08 10:04:51.0 TESORO CORP TSO 4.35% view
S 2013-02-08 09:51:57.0 ATMI INC ATMI 3.97% view
B 93.38% 2013-02-08 09:31:06.0 METABOLIX MBLX 5.72% view
B 104.26% 2012-03-27 11:08:29.0 TITAN INTERNATIONAL INC TWI 5.65% view
S 2012-03-27 10:54:49.0 STEWART ENTERPRISES INC STEI 7.63% view
B -0.52% 2012-03-27 10:40:53.0 METABOLIX MBLX 7.91% view
S 2012-03-27 10:25:52.0 ATMI INC ATMI 6.88% view
B 29.47% 2012-02-13 11:03:07.0 SUN HEALTHCARE GROUP INC SUNH 7.32% view
S 2012-02-13 10:55:49.0 SANTARUS INC SNTS 8.14% view
S 2012-02-13 10:47:58.0 ORTHOFIX INTERNATIONAL N V OFIX 3.5% view
S 2012-02-13 10:40:18.0 HIBBETT SPORTS INC HIBB 0.0% view
B -10.04% 2012-02-13 10:31:55.0 DIONEX CORP ATMI 5.49% view
B 93.52% 2012-02-13 10:22:32.0 TITAN INTERNATIONAL INC TSO 5.48% view
B 21.26% 2012-02-13 10:12:23.0 ARTHROCARE CORP ARTC 6.93% view
B -70.70% 2011-12-09 13:08:48.0 METABOLIX MBLX 10.56% view
B -67.23% 2011-07-08 15:43:01.0 METABOLIX MBLX 11.5% view
S 2011-05-10 11:23:49.0 SKILLED HEALTHCARE GROUP INC SNTS 8.27% view
S 2011-02-11 12:17:07.0 ACI WORLDWIDE ADLR 0.0% view
S 2011-02-11 09:57:36.0 EXTERRAN HOLDINGS INC EXH 4.03% view
S 2011-02-11 09:52:32.0 MEDICINES CO MDCO 0.0% view
S 2011-02-11 09:47:37.0 ORTHOFIX INTERNATIONAL N V OFIX 5.02% view
S 2011-02-11 09:42:41.0 STEWART ENTERPRISES INC STEI 6.76% view
S 2010-12-08 09:09:40.0 SANTARUS INC SNTS 10.58% view
B 2010-10-08 09:25:07.0 SKILLED HEALTHCARE GROUP INC n/a 16.63% view
B 2010-02-11 07:34:23.0 SUN HEALTHCARE GROUP INC SUNH 5.19% view
S 2010-02-11 07:30:18.0 SKILLSOFT PUBLIC LIMITED CO SKIL 4.15% view
S 2010-02-11 07:27:15.0 RBC Bearings INC OSIP 4.91% view
S 2010-02-11 07:24:07.0 NAVIGANT CONSULTING INC NCI 4.85% view
B 44.53% 2010-02-11 07:22:30.0 HIBBETT SPORTS INC HIBB 5.57% view
B 14.31% 2010-02-11 07:17:49.0 EXTERRAN HOLDINGS INC EXH 6.26% view
S 2010-02-11 07:13:17.0 CORINTHIAN COLLEGES INC COCO 0.0% view
S 2010-02-11 07:09:36.0 ATMI INC ATMI 3.55% view
S 2010-02-11 07:05:35.0 ACTUANT CORP ATU 0.0% view
B 2009-11-09 09:58:05.0 SKILLED HEALTHCARE GROUP INC n/a 12.6% view
S 2009-09-09 07:42:56.0 ADOLOR CORP adlr 10.5% view
S 2009-06-09 11:33:28.0 SANTARUS INC SNTS 13.86% view
S 2009-02-04 09:45:58.0 ATMI INC ATMI 6.32% view
S 2009-02-04 09:43:58.0 GEHL CO GEHL 0.0% view
S 2009-02-04 09:40:57.0 RBC Bearings INC ROLL 6.63% view
S 2009-02-04 09:37:57.0 ALEXION PHARMACEUTICALS INC LAXN 4.84% view
S 2009-02-04 09:34:56.0 CARDIONET INC POWI 0.0% view
S 2009-02-04 09:27:55.0 OSI PHARMACEUTICALS INC VSEA 0.0% view
B 2009-02-04 09:21:25.0 GENTIVA HEALTH SERVICES INC n/a 4.1% view
S 2009-02-04 09:18:39.0 NAVIGANT CONSULTING INC PMTI 4.61% view
S 2009-02-04 09:14:54.0 ACTUANT CORP ACIW 3.39% view
S 2009-02-04 09:12:23.0 CORINTHIAN COLLEGES INC COCO 5.23% view
S 2009-02-04 09:08:53.0 SCHAWK INC SGK 0.0% view
S 2009-01-09 09:04:11.0 SANTARUS INC SNTS 15.54% view
S 2009-01-09 09:02:51.0 ADOLOR CORP VNDA 0.0% view
B 2008-07-03 08:46:02.0 Vanda Pharmaceuticals Inc LAXN 7.65% view
B 9.92% 2008-01-10 09:19:28.0 ACI WORLDWIDE ACIW 6.68% view
B 2008-01-10 09:18:47.0 MGI PHARMA INC MOGN 0.0% view
S 2008-01-10 09:17:12.0 NAVIGANT CONSULTING INC NCI 0.0% view
B 17.72% 2008-01-10 09:15:31.0 CORINTHIAN COLLEGES INC COCO 4.97% view
B -81.68% 2008-01-10 09:13:28.0 VALASSIS COMMUNICATIONS INC VCI 0.0% view
B -30.68% 2008-01-10 09:12:48.0 APOGEE ENTERPRISES INC APOG 5.79% view
B -12.94% 2008-01-10 09:10:04.0 OSI PHARMACEUTICALS INC OSIP 8.22% view
S 2008-01-10 09:08:08.0 GEHL CO GEHL 0.07% view
B -54.71% 2008-01-10 09:06:09.0 Vanda Pharmaceuticals Inc IBI 5.49% view
B 2008-01-10 09:04:02.0 HEXCEL CORP HCR 12.0% view
S 2008-01-10 09:02:47.0 GENTIVA HEALTH SERVICES INC PMTI 5.62% view
B -37.32% 2008-01-10 08:58:49.0 STEWART ENTERPRISES INC NUAN 5.27% view
B -21.95% 2008-01-10 08:56:23.0 SKILLSOFT PUBLIC LIMITED CO SKIL 7.45% view
B -33.59% 2008-01-10 08:52:23.0 SCHAWK INC SGK 2.68% view
B -32.33% 2008-01-10 08:51:44.0 SANTARUS INC SNTS 16.44% view
S 2008-01-07 06:08:41.0 Vanda Pharmaceuticals Inc VNDA 9.43% view
B -16.84% 2007-12-06 08:58:26.0 ADOLOR CORP adlr 13.65% view
B -92.92% 2007-09-10 08:45:54.0 Vanda Pharmaceuticals Inc VNDA 11.86% view
B -63.62% 2007-05-09 07:57:22.0 ADOLOR CORP adlr 13.02% view
B -42.96% 2007-04-12 11:36:28.0 SANTARUS INC SNTS 11.35% view
S 2006-06-02 00:00:00.0 RBC Bearings INC ROLL 0.0% view
S 2006-02-14 00:00:00.0 QUINTON CARDIOLOGY SYSTEMS INC SSFT 4.07% view
B -0.11% 2006-02-14 00:00:00.0 AMEGY BANCORPORATION GEHL 7.21% view
B -84.21% 2006-02-13 00:00:00.0 GREENBRIER COMPANIES INC JRCC 5.66% view
B 24.41% 2006-02-13 00:00:00.0 GENTIVA HEALTH SERVICES INC GTIV 9.67% view
B -45.64% 2006-02-13 00:00:00.0 ASV INC asvi 9.77% view
B -19.85% 2006-02-13 00:00:00.0 IMMUCOR INC PFCB 6.02% view
B 2006-02-13 00:00:00.0 PALOMAR MEDICAL TECHNOLOGIES INC slvn 2.84% view
B 17.63% 2006-02-13 00:00:00.0 OSI PHARMACEUTICALS INC alxn 6.05% view
S 2006-02-10 00:00:00.0 EXAR CORP VSEA 2.59% view
S 2006-02-10 00:00:00.0 FLEETWOOD ENTERPRISES INC FLE 0.28% view
S 2006-02-10 00:00:00.0 WABASH NATIONAL CORP WNC 4.38% view
B 34.76% 2006-02-10 00:00:00.0 LECG CORP XPRT 1.39% view
S 2006-02-10 00:00:00.0 ACTUANT CORP ATU 7.01% view
S 2006-02-10 00:00:00.0 NAVIGANT CONSULTING INC NCI 5.84% view
S 2006-02-10 00:00:00.0 KEANE INC KEA 0.0% view
S 2006-02-10 00:00:00.0 ADVANCED MAGNETICS INC CNQR 0.54% view
S 2006-02-10 00:00:00.0 MANOR CARE INC AVO 3.61% view
S 2006-02-10 00:00:00.0 RSA SECURITY INC POWI 5.58% view
S 2006-02-10 00:00:00.0 COST PLUS INC CPWM 0.0% view
S 2006-02-10 00:00:00.0 WRIGHT MEDICAL GROUP INC WMGI 0.0% view
B -20.06% 2006-02-10 00:00:00.0 RADIO ONE INC ROIA 0.0% view
B 33.28% 2005-02-14 00:00:00.0 EXAR CORP EXAR 7.72% view
S 2005-02-14 00:00:00.0 FLEETWOOD ENTERPRISES INC FLE 6.58% view
S 2005-02-14 00:00:00.0 ENTRAVISION COMMUNICATIONS CORP EVC 0.0% view
B 2005-02-14 00:00:00.0 SANTARUS INC SNTS 14.36% view
B 37.25% 2005-02-14 00:00:00.0 ACTUATE CORP ACTU 9.02% view
S 2005-02-14 00:00:00.0 SUPERIOR ENERGY SERVICES INC SPN 0.199% view
S 2005-02-14 00:00:00.0 SRA INTERNATIONAL INC SRX 6.38% view
B -9.41% 2005-02-14 00:00:00.0 LIONBRIDGE TECHNOLOGIES INC LIOX 8.1% view
S 2005-02-14 00:00:00.0 WILSON GREATBATCH TECHNOLOGIES INC QUIN 11.26% view
B 26.15% 2005-02-14 00:00:00.0 POLYMEDICA CORP PLMD 10.55% view
B -19.39% 2005-02-14 00:00:00.0 SEMTECH CORP SMTC 6.86% view
S 2005-02-14 00:00:00.0 SCANSOFT INC SSFT 0.0% view
B 2005-02-14 00:00:00.0 ATMI INC ATMI 6.31% view
S 2005-02-14 00:00:00.0 SOUTHWEST BANCORP OF TEXAS INC CNQR 10.55% view
S 2005-02-14 00:00:00.0 INFORMATION HOLDINGS INC IHI 0.0% view
B 2005-02-14 00:00:00.0 MANOR CARE INC AVO 6.41% view
S 2005-02-14 00:00:00.0 RSA SECURITY INC RSAS 0.174% view
S 2005-02-14 00:00:00.0 DELTA & PINE LAND CO DLP 11.52% view
S 2005-02-14 00:00:00.0 APOLLO GROUP INC APOL 0.0% view
S 2005-02-14 00:00:00.0 WRIGHT MEDICAL GROUP INC slvn 0.09% view
S 2005-02-14 00:00:00.0 EAST WEST BANCORP INC LF 0.0% view
S 2005-02-14 00:00:00.0 TRANSACTION SYSTEMS ARCHITECTS INC WCN 6.25% view
B -29.05% 2005-02-14 00:00:00.0 GUITAR CENTER INC ROIA 5.0% view
S 2005-01-10 00:00:00.0 LIONBRIDGE TECHNOLOGIES INC LIOX 0.0% view
B 65.28% 2004-08-12 00:00:00.0 VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES INC VSEA 6.18% view
B 25.15% 2004-08-12 00:00:00.0 ARMOR HOLDINGS INC AH 10.7% view
B 75.24% 2004-08-12 00:00:00.0 ARMOR HOLDINGS INC AH 3.0% view
B 75.24% 2004-08-12 00:00:00.0 ALLIANCE IMAGING INC AIQ 5.38% view
B 2004-08-12 00:00:00.0 NDCHEALTH CORP NDC 8.04% view
B 66.80% 2004-08-12 00:00:00.0 WILSON GREATBATCH TECHNOLOGIES INC GB 5.48% view
B 2.52% 2004-08-12 00:00:00.0 NAVIGANT CONSULTING INC APOL 5.33% view
B -26.29% 2004-08-12 00:00:00.0 LEAPFROG ENTERPRISES INC LF 5.6% view
B 27.15% 2004-08-12 00:00:00.0 WASTE CONNECTIONS INC WCN 6.77% view
S 2004-08-05 00:00:00.0 CROSS COUNTRY HEALTHCARE INC CCRN n/a view
S 2004-07-27 00:00:00.0 CROSS COUNTRY HEALTHCARE INC CCRN 0.0% view
B 19.89% 2004-07-27 00:00:00.0 ENTRAVISION COMMUNICATIONS CORP EVC 5.9% view
B 41.71% 2004-07-27 00:00:00.0 W WHQ 8.97% view
B 85.70% 2004-07-27 00:00:00.0 W WHQ 10.06% view
B -10.46% 2004-07-27 00:00:00.0 SUPERIOR ENERGY SERVICES INC SPN 6.8% view
B 50.91% 2004-07-27 00:00:00.0 SEACOR HOLDINGS INC CKH 5.3% view
B 54.27% 2004-07-27 00:00:00.0 PSS WORLD MEDICAL INC PSSI 6.68% view
B -40.73% 2004-07-27 00:00:00.0 NMS COMMUNICATIONS CORP NMSS 0.0% view
B -1.92% 2004-07-27 00:00:00.0 QUINTON CARDIOLOGY SYSTEMS INC SMTC 5.56% view
B 45.01% 2004-07-27 00:00:00.0 KEANE INC PHLY 7.18% view
B 13.26% 2004-07-27 00:00:00.0 PHILADELPHIA CONSOLIDATED HOLDING CORP FORR 0.0% view
B 25.49% 2004-07-27 00:00:00.0 SOUTHWEST BANCORP OF TEXAS INC PFCB 4.8% view
B 12.49% 2004-07-27 00:00:00.0 P F CHANGS CHINA BISTRO INC PFCB 4.6% view
B 2004-07-27 00:00:00.0 INFORMATION HOLDINGS INC IHI 6.2% view
B 2004-07-27 00:00:00.0 SELECT MEDICAL CORP SEM 5.86% view
B -26.81% 2004-07-27 00:00:00.0 RSA SECURITY INC RSAS 5.67% view
B 18.45% 2004-07-27 00:00:00.0 POWER INTEGRATIONS INC POWI 6.04% view
B -11.76% 2004-07-27 00:00:00.0 WRIGHT MEDICAL GROUP INC WMGI 6.4% view
B 2004-07-27 00:00:00.0 LAUREATE EDUCATION slvn 6.0% view
B 8.80% 2004-07-27 00:00:00.0 EAST WEST BANCORP INC EWBC 7.86% view
B -36.72% 2004-07-27 00:00:00.0 THERMA WAVE INC twav 0.0% view
B 56.97% 2004-07-27 00:00:00.0 GUITAR CENTER INC GTRC 6.55% view
B 21.75% 2004-07-26 00:00:00.0 CROSS COUNTRY HEALTHCARE INC CCRN n/a view
B 2004-07-21 00:00:00.0 ATLANTIC COAST AIRLINES HOLDINGS INC acai 0.0% view
B 44.44% 2004-07-21 00:00:00.0 ARADIGM CORP ARDM 0.0% view
B 93.24% 2004-07-21 00:00:00.0 CV THERAPEUTICS INC CVTX 5.41% view
B 11.82% 2004-06-14 00:00:00.0 LIONBRIDGE TECHNOLOGIES INC LIOX 10.24% view
B -4.44% 2004-06-10 00:00:00.0 POLYMEDICA CORP PLMD 10.69% view
B -4.44% 2004-06-10 00:00:00.0 CONCUR TECHNOLOGIES INC CNQR 8.83% view
B -24.86% 2004-06-10 00:00:00.0 COST PLUS INC CPWM 10.9% view
B 72.30% 2004-06-10 00:00:00.0 ARMOR HOLDINGS INC AH 10.0% 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.