ESSEX INVESTMENT MANAGEMENT CO LLC
Top Portfolio Positions
296 positions ·
$630,035,267 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| TSEM |
Tower Semiconductor Ltd
Technology
|
115,933 | $20,343,922 | 3.23% | |
| LINC |
Lincoln Educational Services Corp
Consumer Defensive
|
355,304 | $14,453,766 | 2.29% | |
| STRL |
Sterling Infrastructure, Inc.
Industrials
|
32,057 | $13,055,854 | 2.07% | |
| KNSA |
Kiniksa Pharmaceuticals International, plc
Healthcare
|
249,278 | $12,002,735 | 1.91% | |
| LGND |
Ligand Pharmaceuticals Inc
Healthcare
|
58,460 | $11,671,539 | 1.85% | |
| DRS |
Leonardo DRS, Inc.
Industrials
|
261,454 | $11,639,932 | 1.85% | |
| KTOS |
Kratos Defense & Security Solutions, Inc.
Industrials
|
158,844 | $11,200,090 | 1.78% | |
| GSAT |
Globalstar, Inc.
Communication Services
|
165,665 | $11,003,469 | 1.75% | |
| INSM |
INSMED Inc
Healthcare
|
62,676 | $10,248,779 | 1.63% | |
| GHM |
Graham Corp
Industrials
|
128,294 | $10,124,962 | 1.61% |
Portfolio Trend
25 quarters · across all stocks
Holdings in AMPX
Shares Held
Position Value (USD)
5 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $7,510,135 | 445,441 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $4,077,275 | 516,765 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $7,336,511 | 697,387 | Shares | Sole | 2025-11-06 | |
| 2025-06-30 | $4,316,752 | 1,025,357 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $2,507,984 | 935,815 | Shares | Sole | 2025-05-07 | |
| No 13F history on record for this holder in this stock. | ||||||