Filed: 8/6/2026ACC: 0000201772-26-000005
📋 What this filing means
ESSEX INVESTMENT MANAGEMENT CO LLC filed this quarterly 13F‑HR report disclosing 306 equity positions with a total reported market value of $763.37M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
306
Positions
$763.37M
Total AUM (reported)
35.09M
Total Shares
Allocation by class
COM$743.03M97.3%
ADR$17.00M2.2%
ETF$3.34M0.4%
Portfolio Concentration
Top 3$59.93M7.9%
4–10$93.32M12.2%
11–25$138.79M18.2%
Rest$471.33M61.7%
Top 3 weight
7.9%
Top 10 weight
20.1%
Voting Authority Distribution
Total shares with voting rights: 35.09M
Sole
Full voting authority
20.76M
shares
% of voting shares59.2%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
14.33M
shares
% of voting shares40.8%
Investment Discretion (by position count)
Sole306
Shared0
Other0
Dominant voting typeSole · 59.2% of voting shares
Institutional Holdings306
Rows:
TOWER SEMICONDUCTOR LTD
SOLEShares105.54K
TypeSH
Market value$27.51M
3.60%
Sole
82.30K
Shared
0.00
None
23.24K
LINCOLN EDL SVCS CORP
SOLEShares340.37K
TypeSH
Market value$16.98M
2.22%
Sole
183.29K
Shared
0.00
None
157.07K
KINIKSA PHARMACEUTICALS INTL P
SOLEShares241.38K
TypeSH
Market value$15.44M
2.02%
Sole
161.97K
Shared
0.00
None
79.41K
OUSTER INC
SOLEShares226.03K
TypeSH
Market value$14.13M
1.85%
Sole
142.73K
Shared
0.00
None
83.30K
LIGAND PHARMACEUTICALS INC
SOLEShares43.57K
TypeSH
Market value$13.77M
1.80%
Sole
31.49K
Shared
0.00
None
12.08K
CECO ENVIRONMENTAL CORP
SOLEShares150.42K
TypeSH
Market value$13.65M
1.79%
Sole
80.36K
Shared
0.00
None
70.06K
STERLING INFRASTRUCTURE INC
SOLEShares16.16K
TypeSH
Market value$13.56M
1.78%
Sole
11.74K
Shared
0.00
None
4.42K
ARTERIS INC
SOLEShares277.67K
TypeSH
Market value$13.49M
1.77%
Sole
148.28K
Shared
0.00
None
129.39K
MIRUM PHARMACEUTICALS INC
SOLEShares105.67K
TypeSH
Market value$12.37M
1.62%
Sole
79.76K
Shared
0.00
None
25.91K
ARGAN INC
SOLEShares15.47K
TypeSH
Market value$12.35M
1.62%
Sole
8.30K
Shared
0.00
None
7.16K
GRAHAM CORP
SOLEShares93.41K
TypeSH
Market value$11.56M
1.51%
Sole
50.19K
Shared
0.00
None
43.22K
LEONARDO DRS INC
SOLEShares250.22K
TypeSH
Market value$10.68M
1.40%
Sole
134.89K
Shared
0.00
None
115.33K
ADAPTIVE BIOTECHNOLOGIES CORP
SOLEShares472.76K
TypeSH
Market value$10.14M
1.33%
Sole
256.30K
Shared
0.00
None
216.46K
WERNER ENTERPRISES INC
SOLEShares231.63K
TypeSH
Market value$10.10M
1.32%
Sole
168.06K
Shared
0.00
None
63.57K
HCI GROUP INC
SOLEShares56.26K
TypeSH
Market value$9.86M
1.29%
Sole
43.11K
Shared
0.00
None
13.15K
GE VERNOVA INC
SOLEShares8.28K
TypeSH
Market value$9.73M
1.27%
Sole
8.13K
Shared
0.00
None
150.00
COHU INC
SOLEShares131.17K
TypeSH
Market value$9.69M
1.27%
Sole
71.01K
Shared
0.00
None
60.16K
APPLE INC
SOLEShares32.43K
TypeSH
Market value$9.38M
1.23%
Sole
31.78K
Shared
0.00
None
643.00
AMERICAN SUPERCONDUCTOR CORP
SOLEShares221.93K
TypeSH
Market value$9.21M
1.21%
Sole
163.55K
Shared
0.00
None
58.38K
BRAINSWAY LTD
SOLEShares592.61K
TypeSH
Market value$9.19M
1.20%
Sole
327.42K
Shared
0.00
None
265.19K
TETRA TECHNOLOGIES INC DEL
SOLEShares741.01K
TypeSH
Market value$8.40M
1.10%
Sole
396.80K
Shared
0.00
None
344.21K
LSI INDS INC OHIO
SOLEShares295.82K
TypeSH
Market value$7.86M
1.03%
Sole
174.41K
Shared
0.00
None
121.41K
MARVELL TECHNOLOGY INC
SOLEShares25.91K
TypeSH
Market value$7.72M
1.01%
Sole
25.24K
Shared
0.00
None
675.00
KRATOS DEFENSE & SEC SOLUTIONS
SOLEShares153.58K
TypeSH
Market value$7.66M
1.00%
Sole
100.32K
Shared
0.00
None
53.25K
TRAVERE THERAPEUTICS INC
SOLEShares133.87K
TypeSH
Market value$7.60M
1.00%
Sole
68.36K
Shared
0.00
None
65.50K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
TOWER SEMICONDUCTOR LTDSOLE | COM | 105.54K | SH | $27.51M 3.60% | 82.30K | 0.00 | 23.24K |
LINCOLN EDL SVCS CORPSOLE | COM | 340.37K | SH | $16.98M 2.22% | 183.29K | 0.00 | 157.07K |
KINIKSA PHARMACEUTICALS INTL PSOLE | COM | 241.38K | SH | $15.44M 2.02% | 161.97K | 0.00 | 79.41K |
OUSTER INCSOLE | COM | 226.03K | SH | $14.13M 1.85% | 142.73K | 0.00 | 83.30K |
LIGAND PHARMACEUTICALS INCSOLE | COM | 43.57K | SH | $13.77M 1.80% | 31.49K | 0.00 | 12.08K |
CECO ENVIRONMENTAL CORPSOLE | COM | 150.42K | SH | $13.65M 1.79% | 80.36K | 0.00 | 70.06K |
STERLING INFRASTRUCTURE INCSOLE | COM | 16.16K | SH | $13.56M 1.78% | 11.74K | 0.00 | 4.42K |
ARTERIS INCSOLE | COM | 277.67K | SH | $13.49M 1.77% | 148.28K | 0.00 | 129.39K |
MIRUM PHARMACEUTICALS INCSOLE | COM | 105.67K | SH | $12.37M 1.62% | 79.76K | 0.00 | 25.91K |
ARGAN INCSOLE | COM | 15.47K | SH | $12.35M 1.62% | 8.30K | 0.00 | 7.16K |
GRAHAM CORPSOLE | COM | 93.41K | SH | $11.56M 1.51% | 50.19K | 0.00 | 43.22K |
LEONARDO DRS INCSOLE | COM | 250.22K | SH | $10.68M 1.40% | 134.89K | 0.00 | 115.33K |
ADAPTIVE BIOTECHNOLOGIES CORPSOLE | COM | 472.76K | SH | $10.14M 1.33% | 256.30K | 0.00 | 216.46K |
WERNER ENTERPRISES INCSOLE | COM | 231.63K | SH | $10.10M 1.32% | 168.06K | 0.00 | 63.57K |
HCI GROUP INCSOLE | COM | 56.26K | SH | $9.86M 1.29% | 43.11K | 0.00 | 13.15K |
GE VERNOVA INCSOLE | COM | 8.28K | SH | $9.73M 1.27% | 8.13K | 0.00 | 150.00 |
COHU INCSOLE | COM | 131.17K | SH | $9.69M 1.27% | 71.01K | 0.00 | 60.16K |
APPLE INCSOLE | COM | 32.43K | SH | $9.38M 1.23% | 31.78K | 0.00 | 643.00 |
AMERICAN SUPERCONDUCTOR CORPSOLE | COM | 221.93K | SH | $9.21M 1.21% | 163.55K | 0.00 | 58.38K |
BRAINSWAY LTDSOLE | ADR | 592.61K | SH | $9.19M 1.20% | 327.42K | 0.00 | 265.19K |
TETRA TECHNOLOGIES INC DELSOLE | COM | 741.01K | SH | $8.40M 1.10% | 396.80K | 0.00 | 344.21K |
LSI INDS INC OHIOSOLE | COM | 295.82K | SH | $7.86M 1.03% | 174.41K | 0.00 | 121.41K |
MARVELL TECHNOLOGY INCSOLE | COM | 25.91K | SH | $7.72M 1.01% | 25.24K | 0.00 | 675.00 |
KRATOS DEFENSE & SEC SOLUTIONSSOLE | COM | 153.58K | SH | $7.66M 1.00% | 100.32K | 0.00 | 53.25K |
TRAVERE THERAPEUTICS INCSOLE | COM | 133.87K | SH | $7.60M 1.00% | 68.36K | 0.00 | 65.50K |
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