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ESSEX INVESTMENT MANAGEMENT CO LLC
Period ended Sep 30, 2026 · Latest filing Oct 19, 2026
These quarterly holdings are delayed and may not include all assets or short positions.
Values are from the reporting date, not current prices or purchase costs.
The same security may appear in multiple rows.
Source: SEC
Reported portfolio value
Quarter-end reported holdings; not current value or investment performance.
View reported values
- Sep 30, 2026: $674,703,164
More quarters will appear as history becomes available.
Top holdings
Top 10 at Sep 30, 2026. Matching entries are combined; security classes and options remain separate. Shares exclude principal amounts; option shares reflect the reported underlying amount.
View top holdings values
- TOWER SEMICONDUCTOR LTD · COM · M87915274 · shares: $20,814,166
- KINIKSA PHARMACEUTICALS INTL P · COM · G52694109 · shares: $15,072,787
- LIGAND PHARMACEUTICALS INC · COM · 53220K504 · shares: $12,156,503
- ADAPTIVE BIOTECHNOLOGIES CORP · COM · 00650F109 · shares: $11,610,142
- APPLE INC · COM · 037833100 · shares: $10,351,594
- CECO ENVIRONMENTAL CORP · COM · 125141101 · shares: $10,147,732
- HCI GROUP INC · COM · 40416E103 · shares: $9,435,297
- LEONARDO DRS INC · COM · 52661A108 · shares: $8,882,006
- MIRUM PHARMACEUTICALS INC · COM · 604749101 · shares: $8,694,684
- COHU INC · COM · 192576106 · shares: $8,666,045
Reported holdings
301 reported entries| Issuer | Class | CUSIP | Type | Shares / principal | Reported value (USD) |
|---|---|---|---|---|---|
| TONIX PHARMACEUTICALS HLDG CO | COM | 890260839 | — | 292,397 shares | $2,847,947 |
| NEUROPACE INC | COM | 641288105 | — | 202,202 shares | $2,782,300 |
| THE REALREAL INC | COM | 88339P101 | — | 310,518 shares | $2,744,979 |
| APYX MEDICAL CORPORATION | COM | 03837C106 | — | 1,101,878 shares | $2,699,601 |
| ENERGY SERVICES OF AMER CORP | COM | 29271Q103 | — | 242,102 shares | $2,699,437 |
| TEMPUS AI INC | COM | 88023B103 | — | 32,857 shares | $2,690,988 |
| BLACKSKY TECHNOLOGY INC | COM | 09263B207 | — | 126,221 shares | $2,689,770 |
| AMPRIUS TECHNOLOGIES INC | COM | 03214Q108 | — | 277,474 shares | $2,685,948 |
| KORNIT DIGITAL LTD | COM | M6372Q113 | — | 142,299 shares | $2,365,009 |
| NN INC | COM | 629337106 | — | 643,675 shares | $2,362,287 |
| EDAP TMS S A | COM | 268311107 | — | 507,646 shares | $2,269,178 |
| FREIGHTCAR AMER INC | COM | 357023100 | — | 327,154 shares | $2,208,290 |
| ARLO TECHNOLOGIES INC | COM | 04206A101 | — | 177,711 shares | $2,203,616 |
| LIQUIDIA CORPORATION | COM | 53635D202 | — | 72,350 shares | $2,189,311 |
| EXPRO LTD | COM | G3314M109 | — | 138,095 shares | $2,177,758 |
| RIVERVIEW BANCORP INC | COM | 769397100 | — | 361,889 shares | $2,153,240 |
| EVERCORE INC | COM | 29977A105 | — | 8,293 shares | $2,135,448 |
| KVH INDS INC | COM | 482738101 | — | 284,187 shares | $1,997,835 |
| MATADOR RES CO | COM | 576485205 | — | 37,448 shares | $1,931,568 |
| TRIMBLE INC | COM | 896239100 | — | 33,366 shares | $1,905,532 |
| KBR INC | COM | 48242W106 | — | 52,944 shares | $1,861,511 |
| PAYMENTUS HOLDINGS INC | COM | 70439P108 | — | 60,141 shares | $1,842,720 |
| CHENIERE ENERGY INC | COM | 16411R208 | — | 6,639 shares | $1,786,090 |
| VERALTO CORP | COM | 92338C103 | — | 15,042 shares | $1,418,761 |
| MACOM TECH SOLUTIONS HLDGS INC | COM | 55405Y100 | — | 4,919 shares | $1,401,030 |
| CURIOSITYSTREAM INC | COM | 23130Q107 | — | 416,034 shares | $1,210,659 |
| COGNEX CORP | COM | 192422103 | — | 19,669 shares | $1,192,925 |
| VALERO ENERGY CORP | COM | 91913Y100 | — | 2,972 shares | $1,151,977 |
| CARRIER GLOBAL CORPORATION | COM | 14448C104 | — | 20,458 shares | $1,122,326 |
| ALFEN NV | COM | 178983253 | — | 80,514 shares | $1,120,285 |
| SOLV ENERGY INC | COM | 78475V103 | — | 42,894 shares | $1,030,314 |
| SAMSARA INC | COM | 79589l106 | — | 26,735 shares | $1,019,406 |
| LINDSAY CORP | COM | 535555106 | — | 9,004 shares | $1,007,908 |
| PAYCHEX INC | COM | 704326107 | — | 10,085 shares | $993,373 |
| CORTEVA INC | COM | 22052L104 | — | 12,733 shares | $988,717 |
| ISHARES TR | ETF | 464287648 | — | 2,754 shares | $982,903 |
| QUANTA SVCS INC | COM | 74762E102 | — | 1,483 shares | $952,842 |
| ACM RESH INC | COM | 00108J109 | — | 11,770 shares | $952,428 |
| FREIGHTOS LTD | COM | G51405101 | — | 925,924 shares | $879,906 |
| JPMORGAN CHASE & CO | COM | 46625H100 | — | 2,646 shares | $875,376 |
| COCA COLA CO | COM | 191216100 | — | 10,045 shares | $864,674 |
| BARRICK MNG CORP | COM | 06849F108 | — | 21,033 shares | $855,412 |
| GALLAGHER ARTHUR J & CO | COM | 363576109 | — | 3,746 shares | $854,500 |
| RIVIAN AUTOMOTIVE INC | COM | 76954A103 | — | 56,567 shares | $845,111 |
| PROCTER & GAMBLE CO | COM | 742718109 | — | 5,771 shares | $838,411 |
| NEXTPOWER INC | COM | 65290E101 | — | 10,250 shares | $798,783 |
| DEERE & CO | COM | 244199105 | — | 1,186 shares | $796,458 |
| SOLAREDGE TECHNOLOGIES INC | COM | 83417M104 | — | 24,206 shares | $771,445 |
| YASKAWA ELEC CORP | COM | 001230212 | — | 26,089 shares | $769,213 |
| NEXTERA ENERGY INC | COM | 65339F101 | — | 9,923 shares | $751,568 |
| SYMBOTIC INC | COM | 87151X101 | — | 17,700 shares | $744,639 |
| AMBIQ MICRO INC | COM | 023193105 | — | 10,506 shares | $716,194 |
| FRANCO NEV CORP | COM | 351858105 | — | 2,939 shares | $699,805 |
| VALMONT INDS INC | COM | 920253101 | — | 1,510 shares | $699,100 |
| AIR PRODUCTS AND CHEMICALS INC | COM | 009158106 | — | 2,453 shares | $682,498 |
| ORION ENERGY SYS INC | COM | 686275207 | — | 22,089 shares | $673,715 |
| MP MATERIALS CORP | COM | 553368101 | — | 13,906 shares | $657,615 |
| AMTECH SYS INC | COM | 032332504 | — | 37,761 shares | $633,630 |
| WHEATON PRECIOUS METALS CORP | COM | 962879102 | — | 4,731 shares | $632,629 |
| MEDTRONIC PLC | COM | G5960L103 | — | 7,217 shares | $622,755 |
| ETON PHARMACEUTICALS INC | COM | 29772L108 | — | 12,047 shares | $620,300 |
| MARTIN MARIETTA MATLS INC | COM | 573284106 | — | 1,268 shares | $608,399 |
| MARSH & MCLENNAN COS INC | COM | 571748102 | — | 3,530 shares | $602,677 |
| COLGATE PALMOLIVE CO | COM | 194162103 | — | 6,931 shares | $591,353 |
| JOHNSON & JOHNSON | COM | 478160104 | — | 2,189 shares | $579,516 |
| ON SEMICONDUCTOR CORP | COM | 682189105 | — | 7,238 shares | $556,385 |
| SITIME CORP | COM | 82982T106 | — | 850 shares | $554,226 |
| EMCOR GROUP INC | COM | 29084Q100 | — | 734 shares | $553,796 |
| CAMECO CORP | COM | 13321L108 | — | 5,630 shares | $487,952 |
| ELECTROVAYA INC | COM | 28617B606 | — | 71,791 shares | $468,077 |
| NEWMONT CORP | COM | 651639106 | — | 3,934 shares | $453,748 |
| VANGUARD INDEX FDS | ETF | 922908769 | — | 1,206 shares | $451,333 |
| AXCELIS TECHNOLOGIES INC | COM | 054540208 | — | 3,350 shares | $439,453 |
| CAMTEK LTD | COM | M20791105 | — | 2,781 shares | $431,750 |
| VINCE HLDG CORP | COM | 92719W207 | — | 40,722 shares | $410,071 |
| BROADWIND INC | COM | 11161T207 | — | 94,671 shares | $395,725 |
| AEVA TECHNOLOGIES INC | COM | 00835Q202 | — | 27,856 shares | $391,098 |
| EQUINOR ASA | ADR | 29446M102 | — | 9,297 shares | $386,755 |
| EYEPOINT INC | COM | 30233G209 | — | 117,878 shares | $385,461 |
| PEPSICO INC | COM | 713448108 | — | 3,041 shares | $385,356 |
| AMERICAN EXPRESS CO | COM | 025816109 | — | 1,219 shares | $370,698 |
| CEREBRAS SYSTEMS INC | COM | 15675D103 | — | 1,999 shares | $355,122 |
| LENSAR INC | COM | 52634L108 | — | 53,258 shares | $350,970 |
| GRAND CANYON ED INC | COM | 38526M106 | — | 2,300 shares | $348,657 |
| SNAP ON INC | COM | 833034101 | — | 911 shares | $331,012 |
| VERIZON COMMUNICATIONS INC | COM | 92343V104 | — | 6,530 shares | $299,531 |
| GE AEROSPACE | COM | 369604301 | — | 941 shares | $293,865 |
| PERMA-PIPE INTL HLDGS INC | COM | 714167103 | — | 9,516 shares | $292,712 |
| RICHARDSON ELECTRS LTD | COM | 763165107 | — | 16,018 shares | $283,999 |
| STRATTEC SEC CORP | COM | 863111100 | — | 4,199 shares | $272,767 |
| NOVARTIS AG | ADR | 66987V109 | — | 1,875 shares | $267,319 |
| ARCHER DANIELS MIDLAND CO | COM | 039483102 | — | 3,297 shares | $261,716 |
| ALPHA PRO TECH LTD | COM | 020772109 | — | 47,283 shares | $242,089 |
| AXIL BRANDS INC | COM | 76151R206 | — | 39,605 shares | $239,214 |
| MATSON INC | COM | 57686G105 | — | 1,052 shares | $231,061 |
| DUKE ENERGY CORP NEW | COM | 26441C204 | — | 2,010 shares | $229,160 |
| ONE STOP SYS INC | COM | 68247W109 | — | 25,674 shares | $224,134 |
| DATA I O CORP | COM | 237690102 | — | 74,558 shares | $218,455 |
| HARVARD BIOSCIENCE INC | COM | 416906204 | — | 26,973 shares | $213,626 |
| OPTICAL CABLE CORP | COM | 683827208 | — | 12,629 shares | $209,263 |