Filed: 11/6/2025ACC: 0000201772-25-000008
📋 What this filing means
ESSEX INVESTMENT MANAGEMENT CO LLC filed this quarterly 13F‑HR report disclosing 299 equity positions with a total reported market value of $653.42M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
299
Positions
$653.42M
Total AUM (reported)
32.17M
Total Shares
Allocation by class
COM$643.57M98.5%
ADR$9.40M1.4%
ETF$443.9K0.1%
Portfolio Concentration
Top 3$52.39M8.0%
4–10$80.22M12.3%
11–25$118.79M18.2%
Rest$402.03M61.5%
Top 3 weight
8.0%
Top 10 weight
20.3%
Voting Authority Distribution
Total shares with voting rights: 32.17M
Sole
Full voting authority
18.81M
shares
% of voting shares58.5%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
13.36M
shares
% of voting shares41.5%
Investment Discretion (by position count)
Sole299
Shared0
Other0
Dominant voting typeSole · 58.5% of voting shares
Institutional Holdings299
Rows:
KRATOS DEFENSE & SEC SOLUTIONS
SOLEShares244.06K
TypeSH
Market value$22.30M
3.41%
Sole
161.62K
Shared
0.00
None
82.43K
STERLING INFRASTRUCTURE INC
SOLEShares45.64K
TypeSH
Market value$15.50M
2.37%
Sole
33.48K
Shared
0.00
None
12.15K
AMERICAN SUPERCONDUCTOR CORP
SOLEShares245.58K
TypeSH
Market value$14.59M
2.23%
Sole
181.21K
Shared
0.00
None
64.38K
TOWER SEMICONDUCTOR LTD
SOLEShares196.34K
TypeSH
Market value$14.20M
2.17%
Sole
149.91K
Shared
0.00
None
46.43K
INSMED INC
SOLEShares87.08K
TypeSH
Market value$12.54M
1.92%
Sole
51.61K
Shared
0.00
None
35.46K
LEONARDO DRS INC
SOLEShares262.55K
TypeSH
Market value$11.92M
1.82%
Sole
136.52K
Shared
0.00
None
126.03K
HCI GROUP INC
SOLEShares60.32K
TypeSH
Market value$11.58M
1.77%
Sole
45.85K
Shared
0.00
None
14.47K
LIGAND PHARMACEUTICALS INC
SOLEShares61.14K
TypeSH
Market value$10.83M
1.66%
Sole
46.23K
Shared
0.00
None
14.91K
KINIKSA PHARMACEUTICALS INTL P
SOLEShares247.30K
TypeSH
Market value$9.60M
1.47%
Sole
160.51K
Shared
0.00
None
86.79K
ADAPTIVE BIOTECHNOLOGIES CORP
SOLEShares638.46K
TypeSH
Market value$9.55M
1.46%
Sole
332.54K
Shared
0.00
None
305.92K
MICROSOFT CORP
SOLEShares18.27K
TypeSH
Market value$9.46M
1.45%
Sole
17.82K
Shared
0.00
None
447.00
LINCOLN EDL SVCS CORP
SOLEShares397.36K
TypeSH
Market value$9.34M
1.43%
Sole
206.61K
Shared
0.00
None
190.75K
APPLE INC
SOLEShares36.26K
TypeSH
Market value$9.23M
1.41%
Sole
35.47K
Shared
0.00
None
789.00
MIRUM PHARMACEUTICALS INC
SOLEShares113.46K
TypeSH
Market value$8.32M
1.27%
Sole
85.01K
Shared
0.00
None
28.45K
CECO ENVIRONMENTAL CORP
SOLEShares157.98K
TypeSH
Market value$8.09M
1.24%
Sole
81.42K
Shared
0.00
None
76.56K
GRAHAM CORP
SOLEShares143.74K
TypeSH
Market value$7.89M
1.21%
Sole
73.99K
Shared
0.00
None
69.75K
AVEPOINT INC
SOLEShares518.23K
TypeSH
Market value$7.78M
1.19%
Sole
370.78K
Shared
0.00
None
147.45K
ARGAN INC
SOLEShares28.30K
TypeSH
Market value$7.64M
1.17%
Sole
14.65K
Shared
0.00
None
13.65K
WILLDAN GROUP INC
SOLEShares78.92K
TypeSH
Market value$7.63M
1.17%
Sole
40.90K
Shared
0.00
None
38.01K
PRIMORIS SVCS CORP
SOLEShares55.12K
TypeSH
Market value$7.57M
1.16%
Sole
54.10K
Shared
0.00
None
1.03K
AMPRIUS TECHNOLOGIES INC
SOLEShares697.39K
TypeSH
Market value$7.34M
1.12%
Sole
385.71K
Shared
0.00
None
311.68K
MIRION TECHNOLOGIES INC
SOLEShares310.50K
TypeSH
Market value$7.22M
1.11%
Sole
152.42K
Shared
0.00
None
158.08K
GOLDMAN SACHS GROUP INC
SOLEShares8.99K
TypeSH
Market value$7.16M
1.10%
Sole
8.79K
Shared
0.00
None
208.00
GLOBALSTAR INC
SOLEShares194.34K
TypeSH
Market value$7.07M
1.08%
Sole
124.81K
Shared
0.00
None
69.53K
AMBARELLA INC
SOLEShares85.35K
TypeSH
Market value$7.04M
1.08%
Sole
59.35K
Shared
0.00
None
26.01K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
KRATOS DEFENSE & SEC SOLUTIONSSOLE | COM | 244.06K | SH | $22.30M 3.41% | 161.62K | 0.00 | 82.43K |
STERLING INFRASTRUCTURE INCSOLE | COM | 45.64K | SH | $15.50M 2.37% | 33.48K | 0.00 | 12.15K |
AMERICAN SUPERCONDUCTOR CORPSOLE | COM | 245.58K | SH | $14.59M 2.23% | 181.21K | 0.00 | 64.38K |
TOWER SEMICONDUCTOR LTDSOLE | COM | 196.34K | SH | $14.20M 2.17% | 149.91K | 0.00 | 46.43K |
INSMED INCSOLE | COM | 87.08K | SH | $12.54M 1.92% | 51.61K | 0.00 | 35.46K |
LEONARDO DRS INCSOLE | COM | 262.55K | SH | $11.92M 1.82% | 136.52K | 0.00 | 126.03K |
HCI GROUP INCSOLE | COM | 60.32K | SH | $11.58M 1.77% | 45.85K | 0.00 | 14.47K |
LIGAND PHARMACEUTICALS INCSOLE | COM | 61.14K | SH | $10.83M 1.66% | 46.23K | 0.00 | 14.91K |
KINIKSA PHARMACEUTICALS INTL PSOLE | COM | 247.30K | SH | $9.60M 1.47% | 160.51K | 0.00 | 86.79K |
ADAPTIVE BIOTECHNOLOGIES CORPSOLE | COM | 638.46K | SH | $9.55M 1.46% | 332.54K | 0.00 | 305.92K |
MICROSOFT CORPSOLE | COM | 18.27K | SH | $9.46M 1.45% | 17.82K | 0.00 | 447.00 |
LINCOLN EDL SVCS CORPSOLE | COM | 397.36K | SH | $9.34M 1.43% | 206.61K | 0.00 | 190.75K |
APPLE INCSOLE | COM | 36.26K | SH | $9.23M 1.41% | 35.47K | 0.00 | 789.00 |
MIRUM PHARMACEUTICALS INCSOLE | COM | 113.46K | SH | $8.32M 1.27% | 85.01K | 0.00 | 28.45K |
CECO ENVIRONMENTAL CORPSOLE | COM | 157.98K | SH | $8.09M 1.24% | 81.42K | 0.00 | 76.56K |
GRAHAM CORPSOLE | COM | 143.74K | SH | $7.89M 1.21% | 73.99K | 0.00 | 69.75K |
AVEPOINT INCSOLE | COM | 518.23K | SH | $7.78M 1.19% | 370.78K | 0.00 | 147.45K |
ARGAN INCSOLE | COM | 28.30K | SH | $7.64M 1.17% | 14.65K | 0.00 | 13.65K |
WILLDAN GROUP INCSOLE | COM | 78.92K | SH | $7.63M 1.17% | 40.90K | 0.00 | 38.01K |
PRIMORIS SVCS CORPSOLE | COM | 55.12K | SH | $7.57M 1.16% | 54.10K | 0.00 | 1.03K |
AMPRIUS TECHNOLOGIES INCSOLE | COM | 697.39K | SH | $7.34M 1.12% | 385.71K | 0.00 | 311.68K |
MIRION TECHNOLOGIES INCSOLE | COM | 310.50K | SH | $7.22M 1.11% | 152.42K | 0.00 | 158.08K |
GOLDMAN SACHS GROUP INCSOLE | COM | 8.99K | SH | $7.16M 1.10% | 8.79K | 0.00 | 208.00 |
GLOBALSTAR INCSOLE | COM | 194.34K | SH | $7.07M 1.08% | 124.81K | 0.00 | 69.53K |
AMBARELLA INCSOLE | COM | 85.35K | SH | $7.04M 1.08% | 59.35K | 0.00 | 26.01K |
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