ESSEX INVESTMENT MANAGEMENT CO LLC
13F Reported Value
ⓘ$763.4M
Holdings
306
Latest Filing
2026-06-30
Filing Quarter
Q2 2026
Portfolio Overview
ESSEX INVESTMENT MANAGEMENT CO LLC disclosed 306 positions worth $763.4M in its Form 13F-HR for Q2 2026, led by $TSEM (TOWER SEMICONDUCTOR LTD) at 3.6% of the equity portfolio, followed by $LINC and $KNSA. During the quarter the fund opened 25 new positions and exited 24 — including a new stake in $WERN and a full exit from $GSAT. The portfolio is most concentrated in Technology (34.5% of disclosed assets). All figures are sourced directly from ESSEX INVESTMENT MANAGEMENT CO LLC’s Form 13F-HR filing with the SEC under CIK 201772.
AI Fund Analysis
Stable
$TSEM
$LINC
$KNSA
$OUST
$LGND
$CODA$OUST
$LYTS
$PATKSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q2 2026
Click any card to unlockTop Holdings
- —
Quality
$27.5M105,543 sh - 60.3#872
Quality
$17.0M340,366 sh - $15.4M241,382 sh
- 36.2
Quality
$14.1M226,028 sh - 76.0
Quality
$13.8M43,567 sh - 24.6
Quality
$13.6M150,416 sh - 70.6
Quality
$13.6M16,155 sh - 37.2
Quality
$13.5M277,665 sh - 35.0
Quality
$12.4M105,669 sh - 81.4
Quality
$12.4M15,467 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
| TOWER SEMICONDUCTOR LTD$TSEM | — | $27.5M | 105,543 |
| LINCOLN EDUCATIONAL SERVICES CORP$LINC | 60.3#872 | $17.0M | 340,366 |
| Kiniksa Pharmaceuticals International, plc$KNSA | — | $15.4M | 241,382 |
| Ouster, Inc.$OUST | 36.2 | $14.1M | 226,028 |
| LIGAND PHARMACEUTICALS INC$LGND | 76.0 | $13.8M | 43,567 |
 CECO ENVIRONMENTAL CORP$CECO | 24.6 | $13.6M | 150,416 |
 STERLING INFRASTRUCTURE, INC.$STRL | 70.6 | $13.6M | 16,155 |
 Arteris, Inc.$AIP | 37.2 | $13.5M | 277,665 |
 Mirum Pharmaceuticals, Inc.$MIRM | 35.0 | $12.4M | 105,669 |
 ARGAN INC$AGX | 81.4 | $12.4M | 15,467 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of ESSEX INVESTMENT MANAGEMENT CO LLC's 306 positions.
Showing top 10 of 306 holdings.
Sector Allocation
Technology
$263.3M
Industrials
$169.2M
Healthcare
$152.7M
Consumer Discretionary
$53.1M
Financials
$36.2M
Energy
$28.9M
Materials
$18.9M
Consumer Staples
$17.6M
Top Holdings — ESSEX INVESTMENT MANAGEMENT CO LLC (Q2 2026)
Top 150 of 306 disclosed positions (by reported value) from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $TSEM | TOWER SEMICONDUCTOR LTD | $27.5M | 3.6% | -9% | — |
| 2 | $LINC | LINCOLN EDUCATIONAL SERVICES CORP | $17.0M | 2.2% | -4% | 60.3 |
| 3 | $KNSA | Kiniksa Pharmaceuticals International, plc | $15.4M | 2.0% | -3% | — |
| 4 | $OUST | Ouster, Inc. | $14.1M | 1.9% | +22% | 36.2 |
| 5 | $LGND | LIGAND PHARMACEUTICALS INC | $13.8M | 1.8% | -25% | 76 |
| 6 | $CECO | CECO ENVIRONMENTAL CORP | $13.6M | 1.8% | -4% | 24.6 |
| 7 | $STRL | STERLING INFRASTRUCTURE, INC. | $13.6M | 1.8% | -50% | 70.6 |
| 8 | $AIP | Arteris, Inc. | $13.5M | 1.8% | -4% | 37.2 |
| 9 | $MIRM | Mirum Pharmaceuticals, Inc. | $12.4M | 1.6% | -2% | 35 |
| 10 | $AGX | ARGAN INC | $12.4M | 1.6% | -4% | 81.4 |
| 11 |  $GHM | GRAHAM CORP | $11.6M | 1.5% | -27% | 50 |
| 12 |  $DRS | Leonardo DRS, Inc. | $10.7M | 1.4% | -4% | 66.9 |
| 13 |  $ADPT | Adaptive Biotechnologies Corp | $10.1M | 1.3% | -4% | 41.4 |
| 14 |  $WERN | WERNER ENTERPRISES INC | $10.1M | 1.3% | NEW | 45.7 |
| 15 |  $HCI | HCI Group, Inc. | $9.9M | 1.3% | -2% | 75 |
| 16 |  $GEV | GE Vernova Inc. | $9.7M | 1.3% | -0% | 81.1 |
| 17 |  $COHU | COHU INC | $9.7M | 1.3% | -32% | 38.3 |
| 18 |  $AAPL | Apple Inc. | $9.4M | 1.2% | -0% | 76.4 |
| 19 |  $AMSC | AMERICAN SUPERCONDUCTOR CORP /DE/ | $9.2M | 1.2% | -2% | 66 |
| 20 |  $BWAY | Brainsway Ltd. | $9.2M | 1.2% | -4% | — |
| 21 |  $TTI | TETRA TECHNOLOGIES INC | $8.4M | 1.1% | -4% | 38.3 |
| 22 | $LYTS | LSI INDUSTRIES INC | $7.9M | 1.0% | +8% | 58 |
| 23 |  $MRVL | Marvell Technology, Inc. | $7.7M | 1.0% | -28% | 76.5 |
| 24 |  $KTOS | KRATOS DEFENSE & SECURITY SOLUTIONS, INC. | $7.7M | 1.0% | -3% | 44.6 |
| 25 |  $TVTX | Travere Therapeutics, Inc. | $7.6M | 1.0% | -17% | 56.6 |
| 26 |  $GS | GOLDMAN SACHS GROUP INC | $7.6M | 1.0% | -1% | 73.5 |
| 27 | $PATK | PATRICK INDUSTRIES INC | $7.4M | 1.0% | +79% | 51.4 |
| 28 |  $ORN | Orion Group Holdings Inc | $7.4M | 1.0% | -4% | 52.3 |
| 29 |  $ASML | ASML HOLDING NV | $7.0M | 0.9% | -1% | — |
| 30 |  $AMBA | AMBARELLA INC | $6.9M | 0.9% | -3% | 42.5 |
| 31 |  $NVCR | NovoCure Ltd | $6.7M | 0.9% | -3% | — |
| 32 |  $AMZN | AMAZON COM INC | $6.4M | 0.8% | -1% | 68.7 |
| 33 |  $AVPT | AvePoint, Inc. | $6.4M | 0.8% | +15% | 68.2 |
| 34 |  $WMS | ADVANCED DRAINAGE SYSTEMS, INC. | $6.3M | 0.8% | -0% | 63.1 |
| 35 |  $SMTC | SEMTECH CORP | $6.2M | 0.8% | -25% | 55.9 |
| 36 |  $OII | OCEANEERING INTERNATIONAL INC | $6.1M | 0.8% | -4% | 61.4 |
| 37 |  $ECG | Everus Construction Group, Inc. | $6.0M | 0.8% | -5% | 66.3 |
| 38 |  $AEM | AGNICO EAGLE MINES LTD | $6.0M | 0.8% | -0% | — |
| 39 |  $LQDA | Liquidia Corp | $6.0M | 0.8% | -4% | 78.3 |
| 40 |  $WLDN | Willdan Group, Inc. | $5.9M | 0.8% | -4% | 63.7 |
| 41 |  $FEIM | FREQUENCY ELECTRONICS INC | $5.9M | 0.8% | -4% | 31.3 |
| 42 |  $MSFT | MICROSOFT CORP | $5.9M | 0.8% | -0% | 79.8 |
| 43 |  $MAMA | Mama's Creations, Inc. | $5.8M | 0.8% | -4% | 62.2 |
| 44 |  $XERS | Xeris Biopharma Holdings, Inc. | $5.7M | 0.7% | -4% | 56.5 |
| 45 |  $PKE | PARK AEROSPACE CORP | $5.5M | 0.7% | -4% | 62.6 |
| 46 |  $BDSX | BIODESIX INC | $5.5M | 0.7% | +83% | 35 |
| 47 |  $XMTR | Xometry, Inc. | $5.4M | 0.7% | NEW | 48.3 |
| 48 |  $BXC | BlueLinx Holdings Inc. | $5.4M | 0.7% | NEW | 43.2 |
| 49 |  $MITK | MITEK SYSTEMS INC | $5.3M | 0.7% | -4% | 59.2 |
| 50 |  $CXDO | Crexendo, Inc. | $5.3M | 0.7% | -4% | 58.8 |
| 51 |  $MIR | Mirion Technologies, Inc. | $5.3M | 0.7% | -5% | 59 |
| 52 |  $RDVT | Red Violet, Inc. | $5.3M | 0.7% | +35% | 63 |
| 53 |  $JAZZ | Jazz Pharmaceuticals plc | $5.2M | 0.7% | -1% | — |
| 54 |  $DIOD | DIODES INC /DEL/ | $5.1M | 0.7% | -4% | 52.1 |
| 55 |  $APYX | Apyx Medical Corp | $5.1M | 0.7% | +26% | 27.6 |
| 56 |  $BWXT | BWX Technologies, Inc. | $5.0M | 0.7% | -0% | 63.8 |
| 57 |  $OCUL | OCULAR THERAPEUTIX, INC | $4.7M | 0.6% | +23% | 8.4 |
| 58 |  $SFM | Sprouts Farmers Market, Inc. | $4.7M | 0.6% | +430% | 64.8 |
| 59 |  $LPTH | LIGHTPATH TECHNOLOGIES INC | $4.7M | 0.6% | +32% | 34.1 |
| 60 |  $INSM | INSMED Inc | $4.6M | 0.6% | -31% | 39.4 |
| 61 |  $XZO | Exzeo Group, Inc. | $4.5M | 0.6% | -7% | 58.6 |
| 62 |  $MG | Mistras Group, Inc. | $4.5M | 0.6% | -4% | 47.6 |
| 63 |  $SIBN | SI-BONE, Inc. | $4.4M | 0.6% | +28% | 42.7 |
| 64 |  $CON | Concentra Group Holdings Parent, Inc. | $4.4M | 0.6% | -1% | 64.3 |
| 65 |  $TILE | INTERFACE INC | $4.4M | 0.6% | NEW | 58.9 |
| 66 |  $GFF | GRIFFON CORP | $4.4M | 0.6% | -5% | 54.6 |
| 67 |  $JOUT | JOHNSON OUTDOORS INC | $4.3M | 0.6% | +50% | 50.7 |
| 68 |  $DAKT | DAKTRONICS INC /SD/ | $4.2M | 0.6% | +19% | 50.6 |
| 69 |  $CMCO | COLUMBUS MCKINNON CORP | $4.2M | 0.6% | +31% | 37.2 |
| 70 |  $BMI | BADGER METER INC | $4.2M | 0.6% | +206% | 61 |
| 71 |  $MASS | 908 Devices Inc. | $4.1M | 0.5% | -4% | 27 |
| 72 |  $LQDT | LIQUIDITY SERVICES INC | $4.0M | 0.5% | -4% | 64.3 |
| 73 |  $PGEN | PRECIGEN, INC. | $4.0M | 0.5% | NEW | 29.6 |
| 74 |  $AXSM | Axsome Therapeutics, Inc. | $4.0M | 0.5% | -1% | 40.8 |
| 75 |  $AMPX | Amprius Technologies, Inc. | $3.9M | 0.5% | -36% | 34.4 |
| 76 |  $GMED | GLOBUS MEDICAL INC | $3.9M | 0.5% | -1% | 79.5 |
| 77 |  $LTRX | LANTRONIX INC | $3.9M | 0.5% | +93% | 35.7 |
| 78 |  $LGCY | Legacy Education Inc. | $3.9M | 0.5% | +130% | 55.4 |
| 79 |  $RSKD | RISKIFIED LTD. | $3.9M | 0.5% | -4% | — |
| 80 |  $AMTB | Amerant Bancorp Inc. | $3.8M | 0.5% | -4% | 48.7 |
| 81 |  $SOPH | SOPHiA GENETICS SA | $3.8M | 0.5% | -4% | — |
| 82 |  $NUVB | Nuvation Bio Inc. | $3.8M | 0.5% | NEW | 37.9 |
| 83 |  $THRM | Gentherm Inc | $3.7M | 0.5% | -5% | 48.2 |
| 84 |  $BKSY | BlackSky Technology Inc. | $3.6M | 0.5% | -4% | 28.3 |
| 85 |  $ARQT | Arcutis Biotherapeutics, Inc. | $3.6M | 0.5% | -4% | 62.9 |
| 86 |  $DLTR | DOLLAR TREE, INC. | $3.6M | 0.5% | -1% | 68 |
| 87 |  $BGC | BGC Group, Inc. | $3.4M | 0.5% | -5% | 71.9 |
| 88 |  $OSG | OCTAVE SPECIALTY GROUP INC | $3.4M | 0.4% | +29% | 45 |
| 89 |  $FET | FORUM ENERGY TECHNOLOGIES, INC. | $3.3M | 0.4% | NEW | 51 |
| 90 |  $III | Information Services Group Inc. | $3.3M | 0.4% | +111% | 43 |
| 91 |  $NPCE | NeuroPace Inc | $3.3M | 0.4% | -4% | 32.4 |
| 92 |  $RAIL | FreightCar America, Inc. | $3.3M | 0.4% | -4% | 34.7 |
| 93 |  $NOVT | NOVANTA INC | $3.2M | 0.4% | -4% | 51.2 |
| 94 |  $CRWD | CrowdStrike Holdings, Inc. | $3.2M | 0.4% | NEW | 67.7 |
| 95 | $CODA | Coda Octopus Group, Inc. | $3.1M | 0.4% | +70% | — |
| 96 |  $BKR | Baker Hughes Co | $3.0M | 0.4% | -1% | 60.7 |
| 97 |  $IBEX | IBEX Ltd | $3.0M | 0.4% | +70% | 56.2 |
| 98 |  $DCBO | Docebo Inc. | $3.0M | 0.4% | -4% | 49.6 |
| 99 |  $EVR | Evercore Inc. | $2.9M | 0.4% | -4% | 76.9 |
| 100 |  $BRCC | BRC Inc. | $2.9M | 0.4% | NEW | 41.3 |
| 101 |  $KVHI | KVH INDUSTRIES INC \DE\ | $2.9M | 0.4% | NEW | 32.1 |
| 102 | — | ISHARES TR - ETF | $2.8M | 0.4% | +227% | — |
| 103 |  $REAL | TheRealReal, Inc. | $2.7M | 0.4% | NEW | 36.8 |
| 104 |  $STXS | Stereotaxis, Inc. | $2.6M | 0.3% | -4% | 18.7 |
| 105 |  $GWRE | Guidewire Software, Inc. | $2.6M | 0.3% | -1% | 67.3 |
| 106 | — | EVERPURE INC - COM | $2.6M | 0.3% | NEW | — |
| 107 |  $ARLO | Arlo Technologies, Inc. | $2.5M | 0.3% | -5% | 56.4 |
| 108 |  $TRMB | TRIMBLE INC. | $2.5M | 0.3% | +17% | 49.3 |
| 109 |  $ZETA | Zeta Global Holdings Corp. | $2.3M | 0.3% | -4% | 63.4 |
| 110 |  $PAY | Paymentus Holdings, Inc. | $2.2M | 0.3% | -4% | 69.6 |
| 111 |  $DIS | Walt Disney Co | $2.2M | 0.3% | -1% | 60.1 |
| 112 |  $BLND | Blend Labs, Inc. | $2.1M | 0.3% | +65% | 39.5 |
| 113 |  $XPRO.R1575828 | EXPRO GROUP HOLDINGS N.V. | $2.1M | 0.3% | -5% | — |
| 114 |  $TNXP | Tonix Pharmaceuticals Holding Corp. | $2.1M | 0.3% | NEW | 26.5 |
| 115 |  $RVSB | RIVERVIEW BANCORP INC | $2.0M | 0.3% | -4% | 20.3 |
| 116 |  $IDN | Intellicheck, Inc. | $2.0M | 0.3% | -9% | — |
| 117 |  $TEM | Tempus AI, Inc. | $2.0M | 0.3% | -1% | 41.2 |
| 118 |  $PEGA | PEGASYSTEMS INC | $2.0M | 0.3% | -12% | 70.4 |
| 119 |  $LNG | Cheniere Energy, Inc. | $1.9M | 0.3% | -1% | 66.5 |
| 120 |  $MTDR | Matador Resources Co | $1.9M | 0.3% | -6% | 65.9 |
| 121 |  $MTSI | MACOM Technology Solutions Holdings, Inc. | $1.9M | 0.3% | +0% | 69.4 |
| 122 |  $ON | ON SEMICONDUCTOR CORP | $1.8M | 0.2% | +0% | 55 |
| 123 |  $EYPT | EyePoint, Inc. | $1.7M | 0.2% | -4% | 3.5 |
| 124 |  $CURI | CuriosityStream Inc. | $1.6M | 0.2% | -4% | 48.5 |
| 125 |  $CARR | CARRIER GLOBAL Corp | $1.5M | 0.2% | +0% | 56.6 |
| 126 |  $ACMR | ACM Research, Inc. | $1.5M | 0.2% | +0% | 54 |
| 127 |  $CRGO | Freightos Ltd | $1.5M | 0.2% | -4% | — |
| 128 | — | ALFEN NV - COM | $1.4M | 0.2% | +75% | — |
| 129 |  $CGNX | COGNEX CORP | $1.4M | 0.2% | -35% | 66.9 |
| 130 |  $XYL | Xylem Inc. | $1.2M | 0.2% | -0% | 65.8 |
| 131 |  $NXT | Nextpower Inc. | $1.2M | 0.2% | +0% | 69.1 |
| 132 |  $INVE | Identiv, Inc. | $1.2M | 0.2% | -34% | 8.7 |
| 133 |  $AMBQ | Ambiq Micro, Inc. | $1.2M | 0.2% | -29% | 30.1 |
| 134 |  $PWR | QUANTA SERVICES, INC. | $1.1M | 0.1% | +0% | 72.1 |
| 135 | — | YASKAWA ELEC CORP - COM | $1.1M | 0.1% | -2% | — |
| 136 |  $LNN | LINDSAY CORP | $1.1M | 0.1% | +52% | 48.8 |
| 137 |  $UPWK | UPWORK, INC | $1.1M | 0.1% | -5% | 56.8 |
| 138 |  $CTVA | Corteva, Inc. | $1.1M | 0.1% | -32% | 47.2 |
| 139 |  $PAYX | PAYCHEX INC | $1.1M | 0.1% | +0% | 74.6 |
| 140 |  $MWH | SOLV Energy, Inc. | $1.0M | 0.1% | +71% | — |
| 141 |  $RIVN | Rivian Automotive, Inc. / DE | $981,437 | 0.1% | +0% | 35.9 |
| 142 |  $AEVA | Aeva Technologies, Inc. | $977,284 | 0.1% | -42% | 28.8 |
| 143 |  $SHLS | Shoals Technologies Group, Inc. | $927,333 | 0.1% | +0% | 44.5 |
| 144 |  $JPM | JPMORGAN CHASE & CO | $890,665 | 0.1% | +0% | 70.7 |
| 145 |  $ENPH | Enphase Energy, Inc. | $872,730 | 0.1% | -50% | 42.9 |
| 146 |  $VMI | VALMONT INDUSTRIES INC | $872,176 | 0.1% | -46% | 60.7 |
| 147 |  $ASYS | AMTECH SYSTEMS INC | $871,524 | 0.1% | -0% | 46.2 |
| 148 |  $NEE | NEXTERA ENERGY INC | $870,942 | 0.1% | +0% | 64.6 |
| 149 |  $IOT | Samsara Inc. | $867,016 | 0.1% | -19% | 68.6 |
| 150 |  $AJG | Arthur J. Gallagher & Co. | $859,969 | 0.1% | +0% | 71.2 |
New Positions (25)
$WERN WERNER ENTERPRISES INC$10.1M$XMTR Xometry, Inc.$5.4M$BXC BlueLinx Holdings Inc.$5.4M$TILE INTERFACE INC$4.4M$PGEN PRECIGEN, INC.$4.0M$NUVB Nuvation Bio Inc.$3.8M$FET FORUM ENERGY TECHNOLOGIES, INC.$3.3M$CRWD CrowdStrike Holdings, Inc.$3.2M$BRCC BRC Inc.$2.9M$KVHI KVH INDUSTRIES INC \DE\$2.9M$REAL TheRealReal, Inc.$2.7M$TNXP Tonix Pharmaceuticals Holding Corp.$2.1M
$MP MP Materials Corp. / DE$778,875Exited Positions (24)
$GSAT Globalstar, Inc.
$PRIM Primoris Services Corp
$BVS Bioventus Inc.
$SNDX Syndax Pharmaceuticals Inc
$AGIO AGIOS PHARMACEUTICALS, INC.
$EVER EverQuote, Inc.
$CRM Salesforce, Inc.
$VREX Varex Imaging Corp
$INFU InfuSystem Holdings, Inc
$CCLD CareCloud, Inc.
$EXTR EXTREME NETWORKS INC
$LAW CS Disco, Inc.
$GENC GENCOR INDUSTRIES INC
$ZS Zscaler, Inc.Browse Top Institutional Investors
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