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Essex Investment Management Co LLC Portfolio

$674.7M across 301 positions as of 2026-09-30, with 17% of it in the ten largest. 4 quarters on file.

How the reported portfolio did

Each 13F's long stock positions, held to the next quarter's end, against the S&P 500. Yearly rates, on closes without dividends.

Every manager →
1 year
—
a quarter missing or too little priced
3 years
—
a quarter missing or too little priced
5 years
—
a quarter missing or too little priced
Quarters ahead
3 of 10
QuarterPortfolioS&P 500
Jun 30, 2026 to Sep 30, 2026—+2.1%
Mar 31, 2026 to Jun 30, 2026—+14.8%
Dec 31, 2025 to Mar 31, 2026—-4.6%
Sep 30, 2025 to Dec 31, 2025—+2.4%
Jun 30, 2025 to Sep 30, 2025—+7.8%
Mar 31, 2025 to Jun 30, 2025—+10.5%
Dec 31, 2024 to Mar 31, 2025—-4.6%
Sep 30, 2024 to Dec 31, 2024—+2.1%

Largest first

Share is of this manager's reported book. A holding with no symbol is one this site does not track as a company; the filing's own name for it is shown instead.

HoldingValueShareShares
TOWER SEMICONDUCTOR LTD$20.8M3.1%91,519
KINIKSA PHARMACEUTICALS INTL P$15.1M2.2%202,021
LGNDLigand Pharmaceuticals Inc$12.2M1.8%38,917
ADAPTIVE BIOTECHNOLOGIES CORP$11.6M1.7%401,735
AAPLApple Inc$10.4M1.5%31,084
CECOCECO Environmental Corp$10.1M1.5%145,717
HCI GROUP INC$9.4M1.4%54,282
DRSLeonardo DRS Inc$8.9M1.3%242,479
MIRUM PHARMACEUTICALS INC$8.7M1.3%101,716
COHU INC$8.7M1.3%127,180
AVEPOINT INC$7.8M1.2%551,987
STRLSterling Infrastructure Inc$7.6M1.1%15,536
TRAVERE THERAPEUTICS INC$7.6M1.1%129,493
BRAINSWAY LTD$7.6M1.1%574,818
GEVGE Vernova Inc$7.6M1.1%7,978
NUVATION BIO INC$7.5M1.1%1,344,871
WERNWerner Enterprises, Inc. - Common Stock$7.5M1.1%220,515
MSFTMicrosoft Corp$7.4M1.1%14,469
FREQUENCY ELECTRS INC$7.3M1.1%86,267
BIODESIX INC$7M1.0%234,542
AGNICO EAGLE MINES LTD$6.8M1.0%37,195
NOVOCURE LTD$6.8M1.0%424,133
XERIS BIOPHARMA HOLDINGS INC$6.6M1.0%693,260
SMTCSemtech Corp$6.6M1.0%37,026
MRVLMarvell Technology Inc$6.6M1.0%24,845
GRAHAM CORP$6.5M1.0%75,219
AMZNAmazon.com Inc$6.4M1.0%25,879
LANTRONIX INC$6.4M1.0%889,983
OCEANEERING INTL INC$6.4M0.9%146,483
GSGoldman Sachs Group Inc$6.4M0.9%7,069
ARTERIS INC$6.4M0.9%268,987
KTOSKratos Defense and Security Solutions Inc$6.3M0.9%148,246
OUSTER INC$6.2M0.9%152,925
ASML HLDG NV$6.1M0.9%3,394
LINCOLN EDL SVCS CORP$6.1M0.9%278,205
AMERICAN SUPERCONDUCTOR CORP$6M0.9%205,382
BLUELINX HLDGS INC$6M0.9%83,955
LSI INDS INC OHIO$6M0.9%287,681
RISKIFIED LTD$5.9M0.9%745,621
PRECIGEN INC$5.9M0.9%683,419
AGXArgan Inc$5.7M0.8%15,016
908 DEVICES INC$5.6M0.8%455,706
XOMETRY INC$5.6M0.8%54,162
SOPHIA GENETICS SA$5.4M0.8%643,129
AMBARELLA INC$5.4M0.8%77,245
WILLDAN GROUP INC$5.4M0.8%72,557
PATKPatrick Industries Inc$5.4M0.8%78,964
GENTHERM INC$5.3M0.8%158,243
MISTRAS GROUP INC$5.2M0.8%249,209
FETForum Energy Technologies Inc$5.2M0.8%64,563
RED VIOLET INC$5M0.7%63,732
WMSAdvanced Drainage Systems Inc$5M0.7%39,200
SI BONE INC$4.9M0.7%263,101
CONConcentra Group Holdings Parent Inc$4.9M0.7%142,065
JAZZ PHARMACEUTICALS PLC$4.8M0.7%20,819
INSMInsmed Inc$4.7M0.7%41,471
DIODDiodes Inc$4.4M0.6%45,241
MITKMitek Systems Inc$4.4M0.6%255,853
INFORMATION SVCS GROUP INC$4.3M0.6%783,636
COLUMBUS MCKINNON CORP N Y$4.3M0.6%269,821
LIQUIDITY SVCS INC$4.3M0.6%100,074
WTSWatts Water Technologies Inc$4.2M0.6%11,985
CRWDCrowdStrike Holdings Inc$4.2M0.6%16,017
NOVTNovanta Inc$4.2M0.6%29,696
TETRA TECHNOLOGIES INC DEL$4.2M0.6%717,931
AMERANT BANCORP INC$4.2M0.6%145,593
EVERUS CONSTR GROUP$4.1M0.6%35,182
PARK AEROSPACE CORP$4.1M0.6%139,188
IBEX LTD$4.1M0.6%95,123
INTERFACE INC$4.1M0.6%119,416
MAMAS CREATIONS INC$4.1M0.6%316,744
GRIFFON CORP$4M0.6%43,460
MIRION TECHNOLOGIES INC$4M0.6%285,357
EVERPURE INC$4M0.6%30,793
JOHNSON OUTDOORS INC$4M0.6%91,310
ALPHA COGNITION INC$3.8M0.6%422,858
EXZEO GROUP INC$3.7M0.5%256,229
NVDANVIDIA Corp$3.7M0.5%16,210
GMEDGlobus Medical Inc$3.7M0.5%49,303
DOCEBO INC$3.7M0.5%160,089
ORION GROUP HLDGS INC$3.7M0.5%429,003
LGIHLGI Homes Inc$3.7M0.5%78,553
DAKTRONICS INC$3.6M0.5%209,874
ZETA GLOBAL HOLDINGS CORP$3.6M0.5%113,829
BGC GROUP INC$3.6M0.5%310,920
OCULAR THERAPEUTIX INC$3.6M0.5%467,325
ARQTArcutis Biotherapeutics Inc$3.5M0.5%132,924
INNOVATIVE SOLUTIONS & SUPPORT$3.4M0.5%184,874
FENNEC PHARMACEUTICALS INC$3.4M0.5%318,771
BMIBadger Meter Inc$3.4M0.5%27,446
CODA OCTOPUS GROUP INC$3.4M0.5%312,533
BWXTBWX Technologies Inc$3.4M0.5%24,473
OCFCOceanFirst Financial Corp$3.3M0.5%198,887
DLTRDollar Tree Inc$3.2M0.5%28,367
LEGACY ED INC$3.1M0.5%320,990
SFMSprouts Farmers Market Inc$3M0.5%45,830
GWREGuidewire Software Inc$2.9M0.4%20,237
AXSMAxsome Therapeutics Inc$2.9M0.4%15,616
LIGHTPATH TECHNOLOGIES INC$2.9M0.4%277,089
BKRBaker Hughes Co$2.9M0.4%52,020
TONIX PHARMACEUTICALS HLDG CO$2.8M0.4%292,397
NEUROPACE INC$2.8M0.4%202,202
THE REALREAL INC$2.7M0.4%310,518
APYX MEDICAL CORPORATION$2.7M0.4%1,101,878
ENERGY SERVICES OF AMER CORP$2.7M0.4%242,102
TEMTempus AI Inc$2.7M0.4%32,857
BLACKSKY TECHNOLOGY INC$2.7M0.4%126,221
AMPRIUS TECHNOLOGIES INC$2.7M0.4%277,474
KORNIT DIGITAL LTD$2.4M0.4%142,299
NN INC$2.4M0.4%643,675
EDAP TMS S A$2.3M0.3%507,646
FREIGHTCAR AMER INC$2.2M0.3%327,154
ARLO TECHNOLOGIES INC$2.2M0.3%177,711
LIQUIDIA CORPORATION$2.2M0.3%72,350
EXPRO LTD$2.2M0.3%138,095
RIVERVIEW BANCORP INC$2.2M0.3%361,889
EVERCORE INC$2.1M0.3%8,293
KVH INDS INC$2M0.3%284,187
MTDRMatador Resources Co$1.9M0.3%37,448
TRMBTrimble Inc$1.9M0.3%33,366
KBR INC$1.9M0.3%52,944
PAYMENTUS HOLDINGS INC$1.8M0.3%60,141
LNGCheniere Energy Inc$1.8M0.3%6,639
VLTOVeralto Corp$1.4M0.2%15,042
MTSIMACOM Technology Solutions Holdings Inc$1.4M0.2%4,919
CURIOSITYSTREAM INC$1.2M0.2%416,034
CGNXCognex Corp$1.2M0.2%19,669
VLOValero Energy Corp$1.2M0.2%2,972
CARRCarrier Global Corp$1.1M0.2%20,458
ALFEN NV$1.1M0.2%80,514
SOLV ENERGY INC$1M0.2%42,894
IOTSamsara Inc$1M0.2%26,735
LNNLindsay Corp$1M0.1%9,004
PAYXPaychex Inc$993.4K0.1%10,085
CTVACorteva Inc$988.7K0.1%12,733
IWOiShares Russell 2000 Growth Fund$982.9K0.1%2,754
PWRQuanta Services Inc$952.8K0.1%1,483
ACM RESH INC$952.4K0.1%11,770
FREIGHTOS LTD$879.9K0.1%925,924
JPMJPMorgan Chase & Co$875.4K0.1%2,646
KOCoca-Cola Co$864.7K0.1%10,045
BBarrick Mining Corporation Common Shares$855.4K0.1%21,033
AJGArthur J. Gallagher & Co.$854.5K0.1%3,746
RIVNRivian Automotive Inc$845.1K0.1%56,567
PGProcter & Gamble Co$838.4K0.1%5,771
NEXTPOWER INC$798.8K0.1%10,250
DEDeere & Co$796.5K0.1%1,186
SEDGSolaredge Technologies Inc$771.4K0.1%24,206
YASKAWA ELEC CORP$769.2K0.1%26,089
NEENextera Energy Inc$751.6K0.1%9,923
SYMBOTIC INC$744.6K0.1%17,700
AMBIQ MICRO INC$716.2K0.1%10,506
FNVFranco-Nevada Corp$699.8K0.1%2,939
VALMONT INDS INC$699.1K0.1%1,510
APDAir Products and Chemicals Inc$682.5K0.1%2,453
ORION ENERGY SYS INC$673.7K0.1%22,089
MPMP Materials Corp$657.6K0.1%13,906
AMTECH SYS INC$633.6K0.1%37,761
WPMWheaton Precious Metals Corp$632.6K0.1%4,731
MEDTRONIC PLC$622.8K0.1%7,217
ETON PHARMACEUTICALS INC$620.3K0.1%12,047
MLMMartin Marietta Materials Inc$608.4K0.1%1,268
MRSHMarsh & McLennan Companies Inc$602.7K0.1%3,530
CLColgate-Palmolive Co$591.4K0.1%6,931
JNJJohnson & Johnson$579.5K0.1%2,189
ONON Semiconductor Corp$556.4K0.1%7,238
SITIME CORP$554.2K0.1%850
EMEEMCOR Group Inc$553.8K0.1%734
CCJCameco Corp$488K0.1%5,630
ELECTROVAYA INC$468.1K0.1%71,791
NEMNewmont Corporation$453.7K0.1%3,934
VTIVanguard Total Stock Market ETF$451.3K0.1%1,206
AXCELIS TECHNOLOGIES INC$439.5K0.1%3,350
CAMTEK LTD$431.8K0.1%2,781
VNCEVince Holding Corp$410.1K0.1%40,722
BROADWIND INC$395.7K0.1%94,671
AEVA TECHNOLOGIES INC$391.1K0.1%27,856
EQNREquinor ASA$386.8K0.1%9,297
EYEPOINT INC$385.5K0.1%117,878
PEPPepsiCo Inc$385.4K0.1%3,041
AXPAmerican Express Co$370.7K0.1%1,219
CEREBRAS SYSTEMS INC$355.1K0.1%1,999
LENSAR INC$351K0.1%53,258
LOPEGrand Canyon Education Inc$348.7K0.1%2,300
SNASnap-On Inc$331K0.0%911
VZVerizon Communications Inc$299.5K0.0%6,530
GEGeneral Electric Co$293.9K0.0%941
PERMA-PIPE INTL HLDGS INC$292.7K0.0%9,516
RICHARDSON ELECTRS LTD$284K0.0%16,018
STRATTEC SEC CORP$272.8K0.0%4,199
NVSNovartis AG$267.3K0.0%1,875
ADMArcher-Daniels-Midland Co$261.7K0.0%3,297
ALPHA PRO TECH LTD$242.1K0.0%47,283
AXIL BRANDS INC$239.2K0.0%39,605
MATSON INC$231.1K0.0%1,052
DUKDuke Energy Corp$229.2K0.0%2,010
ONE STOP SYS INC$224.1K0.0%25,674
DATA I O CORP$218.5K0.0%74,558
HARVARD BIOSCIENCE INC$213.6K0.0%26,973
OPTICAL CABLE CORP$209.3K0.0%12,629
TRANSACT TECHNOLOGIES INC$208.9K0.0%43,161
BOS BETTER ONLINE SOLUTIONS$207K0.0%43,855
374WATER INC$205.7K0.0%63,303
NETSOL TECHNOLOGIES INC$205.5K0.0%37,424
TSLATesla Inc$203.3K0.0%573
CPS TECHNOLOGIES CORP$203.2K0.0%54,324
XOMExxonmobil Holdings Corp$200.9K0.0%1,245
PRECISION OPTICS CORP INC MASS$193.5K0.0%46,630
AMPLITECH GROUP INC$190.1K0.0%60,526
EOS ENERGY ENTERPRISES INC$185.2K0.0%60,425
SOSouthern Co$184.3K0.0%2,223
COMMERCIAL VEH GROUP INC$175K0.0%59,730
DUOS TECHNOLOGIES GROUP INC$168.7K0.0%19,083
AITApplied Industrial Technologies Inc$167.8K0.0%505
GSI TECHNOLOGY INC$165.6K0.0%30,410
ADPAutomatic Data Processing Inc$165.4K0.0%641
MRKMerck & Co Inc$164.5K0.0%1,132
COSTCostco Wholesale Corp$163.9K0.0%180
MUMicron Technology Inc$163K0.0%153
MPWRMonolithic Power Systems Inc$161.7K0.0%120
FATPIPE INC UT$158.9K0.0%29,053
FLEXIBLE SOLUTIONS INTL INC$157.3K0.0%26,180
ABTAbbott Laboratories$150.5K0.0%1,523
NEPHROS INC$144.4K0.0%38,927
TRIO TECH INTL$143.7K0.0%22,115
RF INDS LTD$141.5K0.0%17,864
NOVA LTD$138.3K0.0%359
ORCLOracle Corp$137.3K0.0%1,000
FUEL TECH INC$125K0.0%77,159
GOOGAlphabet Inc$109K0.0%320
GENASYS INC$105.4K0.0%72,711
WMWaste Management Inc$100.7K0.0%494
TWSTTwist Bioscience Corp$97K0.0%502
INTUIntuit Inc$93.5K0.0%339
FCXFreeport-McMoRan Inc$90.8K0.0%1,297
WABWestinghouse Air Brake Technologies Corp$87.9K0.0%306
CINFCincinnati Financial Corp$87.5K0.0%549
AMNEAL PHARMACEUTICALS INC$86.5K0.0%4,295
NVENT ELEC PLC$81.5K0.0%508
AMKRAmkor Technology Inc$79.9K0.0%1,526
RGLDRoyal Gold Inc$79.8K0.0%338
PMPhilip Morris International Inc$76.7K0.0%402
DTEDTE Energy Co$73.3K0.0%602
BMYBristol-Myers Squibb Co$69.9K0.0%1,120
RIORio Tinto PLC$67.1K0.0%713
GLAUKOS CORP$66.8K0.0%407
KINROSS GOLD CORP$64.1K0.0%2,661
CLHClean Harbors Inc$59.9K0.0%193
GATES INDL CORP LTD$52.3K0.0%1,996
HINGE HEALTH INC$52.1K0.0%536
FLOWSERVE CORP$51K0.0%697
CRISPR THERAPEUTICS AG$48.5K0.0%877
WKWorkiva Inc$48.5K0.0%728
ACAArcosa Inc$48.4K0.0%331
ATMUS FILTRATION TECHNOLOGIES$48.3K0.0%1,112
EXCELERATE ENERGY INC$47.4K0.0%1,475
DANDana Inc$45.5K0.0%1,665
WECWEC Energy Group Inc$43.3K0.0%430
REMITLY GLOBAL INC$43K0.0%2,016
SLViShares Silver Trust$42K0.0%771
PPLPPL Corp$40.7K0.0%1,238
AYIAcuity Inc$40.6K0.0%131
RRCRange Resources Corp$40.4K0.0%1,091
WMBWilliams Companies Inc$38.9K0.0%573
BRK.BBerkshire Hathaway Inc$37.8K0.0%76
UPSUnited Parcel Service Inc$37.8K0.0%404
AVNTAvient Corp$36.8K0.0%915
QTWOQ2 Holdings Inc$36.3K0.0%655
DTMDT Midstream Inc$36K0.0%301
VIRTRA INC$34.8K0.0%12,797
IFNNYInfineon Technologies AG$34.4K0.0%511
VVisa Inc$33.1K0.0%92
ITRON INC$31.3K0.0%362
DDDupont De Nemours Inc$30.9K0.0%238
ROKRockwell Automation Inc$30.5K0.0%70
SRESempra$30.4K0.0%390
FIVEFive Below Inc$30.1K0.0%137
BPBP PLC$29.1K0.0%662
EATON CORP PLC$28.4K0.0%66
APHAmphenol Corp$28.3K0.0%336
HPHelmerich and Payne Inc$27.2K0.0%733
GENPACT LIMITED$26.8K0.0%823
ECLEcolab Inc$26.6K0.0%97
SLBSLB NV$25K0.0%514
XYLXylem Inc$22.1K0.0%218
ALKTAlkami Technology Inc$21.5K0.0%1,567
GOOGLAlphabet Inc$21.3K0.0%62
TERTeradyne Inc$20.8K0.0%52
STZConstellation Brands Inc$20.1K0.0%178
GDXJVANECK ETF TRUST$17.8K0.0%156
SENESTECH INC$17.7K0.0%26,203
RRXRegal Rexnord Corp$15.5K0.0%100
QQnity Electronics Inc$13.3K0.0%106
FDXFedEx Corp$12.8K0.0%45
CONTEMPORARY AMPEREX TECHNO$11.1K0.0%722
UNPUnion Pacific Corp$9.5K0.0%35
SNYSanofi SA$8.2K0.0%200
SDZNYSandoz Group AG$4K0.0%47
FEDEX FGHT HLDG CO INC$2.4K0.0%22
LYONDELLBASELL INDUSTRIES NV$1.4K0.0%25
OGNOrganon & Co$1510.0%11

Quarter ending 2026-09-30.

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