Filed: 8/12/2025ACC: 0000201772-25-000006
📋 What this filing means
ESSEX INVESTMENT MANAGEMENT CO LLC filed this quarterly 13F‑HR report disclosing 298 equity positions with a total reported market value of $549.97M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
298
Positions
$549.97M
Total AUM (reported)
30.23M
Total Shares
Allocation by class
COM$541.09M98.4%
ADR$8.20M1.5%
ETF$680.8K0.1%
Portfolio Concentration
Top 3$41.23M7.5%
4–10$65.03M11.8%
11–25$95.91M17.4%
Rest$347.80M63.2%
Top 3 weight
7.5%
Top 10 weight
19.3%
Voting Authority Distribution
Total shares with voting rights: 30.23M
Sole
Full voting authority
17.25M
shares
% of voting shares57.1%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
12.98M
shares
% of voting shares42.9%
Investment Discretion (by position count)
Sole298
Shared0
Other0
Dominant voting typeSole · 57.1% of voting shares
Institutional Holdings298
Rows:
KRATOS DEFENSE & SEC SOLUTIONS
SOLEShares350.35K
TypeSH
Market value$16.27M
2.96%
Sole
227.64K
Shared
0.00
None
122.71K
AMERICAN SUPERCONDUCTOR CORP
SOLEShares346.04K
TypeSH
Market value$12.70M
2.31%
Sole
268.27K
Shared
0.00
None
77.77K
STERLING INFRASTRUCTURE INC
SOLEShares53.12K
TypeSH
Market value$12.26M
2.23%
Sole
39.17K
Shared
0.00
None
13.95K
LEONARDO DRS INC
SOLEShares254.04K
TypeSH
Market value$11.81M
2.15%
Sole
128.01K
Shared
0.00
None
126.03K
AVEPOINT INC
SOLEShares512.70K
TypeSH
Market value$9.90M
1.80%
Sole
365.25K
Shared
0.00
None
147.45K
MICROSOFT CORP
SOLEShares18.48K
TypeSH
Market value$9.19M
1.67%
Sole
18.04K
Shared
0.00
None
447.00
HCI GROUP INC
SOLEShares59.98K
TypeSH
Market value$9.13M
1.66%
Sole
45.51K
Shared
0.00
None
14.47K
LINCOLN EDL SVCS CORP
SOLEShares384.55K
TypeSH
Market value$8.86M
1.61%
Sole
193.81K
Shared
0.00
None
190.75K
TOWER SEMICONDUCTOR LTD
SOLEShares195.30K
TypeSH
Market value$8.47M
1.54%
Sole
148.86K
Shared
0.00
None
46.43K
GE VERNOVA INC
SOLEShares14.48K
TypeSH
Market value$7.66M
1.39%
Sole
14.24K
Shared
0.00
None
243.00
APPLE INC
SOLEShares36.65K
TypeSH
Market value$7.52M
1.37%
Sole
35.86K
Shared
0.00
None
789.00
ADAPTIVE BIOTECHNOLOGIES CORP
SOLEShares617.30K
TypeSH
Market value$7.19M
1.31%
Sole
311.38K
Shared
0.00
None
305.92K
LIGAND PHARMACEUTICALS INC
SOLEShares60.81K
TypeSH
Market value$6.91M
1.26%
Sole
45.90K
Shared
0.00
None
14.91K
GRAHAM CORP
SOLEShares138.97K
TypeSH
Market value$6.88M
1.25%
Sole
69.22K
Shared
0.00
None
69.75K
WILLDAN GROUP INC
SOLEShares107.23K
TypeSH
Market value$6.70M
1.22%
Sole
53.62K
Shared
0.00
None
53.61K
INSMED INC
SOLEShares66.34K
TypeSH
Market value$6.68M
1.21%
Sole
31.39K
Shared
0.00
None
34.95K
AMAZON COM INC
SOLEShares29.60K
TypeSH
Market value$6.49M
1.18%
Sole
28.88K
Shared
0.00
None
723.00
GOLDMAN SACHS GROUP INC
SOLEShares9.15K
TypeSH
Market value$6.48M
1.18%
Sole
8.91K
Shared
0.00
None
243.00
MIRION TECHNOLOGIES INC
SOLEShares299.82K
TypeSH
Market value$6.46M
1.17%
Sole
141.74K
Shared
0.00
None
158.08K
OUSTER INC
SOLEShares250.17K
TypeSH
Market value$6.07M
1.10%
Sole
141.34K
Shared
0.00
None
108.83K
ARGAN INC
SOLEShares27.32K
TypeSH
Market value$6.02M
1.10%
Sole
13.67K
Shared
0.00
None
13.65K
MIRUM PHARMACEUTICALS INC
SOLEShares112.73K
TypeSH
Market value$5.74M
1.04%
Sole
84.28K
Shared
0.00
None
28.45K
EVERQUOTE INC
SOLEShares234.68K
TypeSH
Market value$5.67M
1.03%
Sole
179.56K
Shared
0.00
None
55.12K
AMBARELLA INC
SOLEShares84.48K
TypeSH
Market value$5.58M
1.01%
Sole
58.47K
Shared
0.00
None
26.01K
NEXTERA ENERGY INC
SOLEShares79.53K
TypeSH
Market value$5.52M
1.00%
Sole
78.41K
Shared
0.00
None
1.13K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
KRATOS DEFENSE & SEC SOLUTIONSSOLE | COM | 350.35K | SH | $16.27M 2.96% | 227.64K | 0.00 | 122.71K |
AMERICAN SUPERCONDUCTOR CORPSOLE | COM | 346.04K | SH | $12.70M 2.31% | 268.27K | 0.00 | 77.77K |
STERLING INFRASTRUCTURE INCSOLE | COM | 53.12K | SH | $12.26M 2.23% | 39.17K | 0.00 | 13.95K |
LEONARDO DRS INCSOLE | COM | 254.04K | SH | $11.81M 2.15% | 128.01K | 0.00 | 126.03K |
AVEPOINT INCSOLE | COM | 512.70K | SH | $9.90M 1.80% | 365.25K | 0.00 | 147.45K |
MICROSOFT CORPSOLE | COM | 18.48K | SH | $9.19M 1.67% | 18.04K | 0.00 | 447.00 |
HCI GROUP INCSOLE | COM | 59.98K | SH | $9.13M 1.66% | 45.51K | 0.00 | 14.47K |
LINCOLN EDL SVCS CORPSOLE | COM | 384.55K | SH | $8.86M 1.61% | 193.81K | 0.00 | 190.75K |
TOWER SEMICONDUCTOR LTDSOLE | COM | 195.30K | SH | $8.47M 1.54% | 148.86K | 0.00 | 46.43K |
GE VERNOVA INCSOLE | COM | 14.48K | SH | $7.66M 1.39% | 14.24K | 0.00 | 243.00 |
APPLE INCSOLE | COM | 36.65K | SH | $7.52M 1.37% | 35.86K | 0.00 | 789.00 |
ADAPTIVE BIOTECHNOLOGIES CORPSOLE | COM | 617.30K | SH | $7.19M 1.31% | 311.38K | 0.00 | 305.92K |
LIGAND PHARMACEUTICALS INCSOLE | COM | 60.81K | SH | $6.91M 1.26% | 45.90K | 0.00 | 14.91K |
GRAHAM CORPSOLE | COM | 138.97K | SH | $6.88M 1.25% | 69.22K | 0.00 | 69.75K |
WILLDAN GROUP INCSOLE | COM | 107.23K | SH | $6.70M 1.22% | 53.62K | 0.00 | 53.61K |
INSMED INCSOLE | COM | 66.34K | SH | $6.68M 1.21% | 31.39K | 0.00 | 34.95K |
AMAZON COM INCSOLE | COM | 29.60K | SH | $6.49M 1.18% | 28.88K | 0.00 | 723.00 |
GOLDMAN SACHS GROUP INCSOLE | COM | 9.15K | SH | $6.48M 1.18% | 8.91K | 0.00 | 243.00 |
MIRION TECHNOLOGIES INCSOLE | COM | 299.82K | SH | $6.46M 1.17% | 141.74K | 0.00 | 158.08K |
OUSTER INCSOLE | COM | 250.17K | SH | $6.07M 1.10% | 141.34K | 0.00 | 108.83K |
ARGAN INCSOLE | COM | 27.32K | SH | $6.02M 1.10% | 13.67K | 0.00 | 13.65K |
MIRUM PHARMACEUTICALS INCSOLE | COM | 112.73K | SH | $5.74M 1.04% | 84.28K | 0.00 | 28.45K |
EVERQUOTE INCSOLE | COM | 234.68K | SH | $5.67M 1.03% | 179.56K | 0.00 | 55.12K |
AMBARELLA INCSOLE | COM | 84.48K | SH | $5.58M 1.01% | 58.47K | 0.00 | 26.01K |
NEXTERA ENERGY INCSOLE | COM | 79.53K | SH | $5.52M 1.00% | 78.41K | 0.00 | 1.13K |
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