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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) |
|---|---|---|---|---|---|
| ORGANON & CO | COM | 68622V106 | — | 11 shares | $151 |