StockDriftsStockDriftsTop 50 Essex Investment Management CO LLC Holdings
| Stock | Company | % Port. | Shares | Value | Activity | Ownership | Avg. Cost | Date |
|---|---|---|---|---|---|---|---|---|
| TSEM | TOWER SEMICONDUCTOR LTD | 3.08% | 91.5K | $20.8M | -13.29%(-14.02K) | $33.89(+491.10%) | 2026-09-30 | |
| KNSA | KINIKSA PHARMACEUTICALS INTL P | 2.23% | 202.0K | $15.1M | -16.31%(-39.36K) | $19.95(+298.46%) | 2026-09-30 | |
| LGND | LIGAND PHARMACEUTICALS INC | 1.8% | 38.9K | $12.2M | -10.67%(-4.65K) | $79.04(+276.10%) | 2026-09-30 | |
| ADPT | ADAPTIVE BIOTECHNOLOGIES CORP | 1.72% | 401.7K | $11.6M | -15.02%(-71.03K) | $5.35(+347.62%) | 2026-09-30 | |
| AAPL | APPLE INC | 1.53% | 31.1K | $10.4M | -4.14%(-1.34K) | $68.60(+399.89%) | 2026-09-30 | |
| CECO | CECO ENVIRONMENTAL CORP | 1.5% | 145.7K | $10.1M | -3.12%(-4.70K) | $9.90(+480.47%) | 2026-09-30 | |
| HCI | HCI GROUP INC | 1.4% | 54.3K | $9.4M | -3.52%(-1.98K) | $56.65(+252.64%) | 2026-09-30 | |
| DRS | LEONARDO DRS INC | 1.32% | 242.5K | $8.9M | -3.09%(-7.74K) | $14.86(+136.67%) | 2026-09-30 | |
| MIRM | MIRUM PHARMACEUTICALS INC | 1.29% | 101.7K | $8.7M | -3.74%(-3.95K) | $48.53(+73.80%) | 2026-09-30 | |
| COHU | COHU INC | 1.28% | 127.2K | $8.7M | -3.04%(-3.99K) | $17.96(+196.54%) | 2026-09-30 |
| Performance Metric | 3-Year Annualized | 3-Year Cumulative | 5-Year Annualized | 5-Year Cumulative |
|---|---|---|---|---|
| Top 20 Holdings Weighted | +39.14% | +169.40% | +12.81% | +82.70% |
| Top 20 Holdings Unweighted | +36.20% | +152.65% | +11.93% | +75.68% |
Essex Investment Management CO LLC reports $674.70M in US-listed equity holdings across 301 positions in its most recent 13F filing. Its largest disclosed positions are TSEM (3.1%), KNSA (2.2%) and LGND (1.8%). The top 20 holdings account for 28.25% of reported assets. Its disclosed equity book has returned +169.40% on a three-year cumulative basis. Figures reflect the Q3 2026 filing.
Portfolio changes
Every reported change this quarter, grouped by direction. The signal is in the rotation, not any single trade.
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Holdings on this page are parsed from Essex Investment Management CO LLC’s Form 13F filings with the U.S. Securities and Exchange Commission (CIK 201772). View Essex Investment Management CO LLC’s 13F filings on SEC