ESSEX INVESTMENT MANAGEMENT CO LLC
Q4 2024 Form 13-F

BOSTON, MASSACHUSETTS
CIK 0000201772 · CRD 109962 · SEC-registered investment adviser
$556.1M Reported Value Total

ESSEX INVESTMENT MANAGEMENT COMPANY, LLC reports 124 total accounts under management (AUM). There are 124 discretionary accounts valued at $610,160,466, and 0 non-discretionary accounts.

Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
SEC Registered Discretionary Manager
Private funds (Form ADV)
18 funds · $88.4M gross asset value
Hedge Fund: $88.4M
Source: Form ADV filed 2026-03-30
Reported value
$556.1M
Quarter over quarter
+5.6%
Holdings
307
Top-10 concentration
17.2%

Filing Structure

Reports holdings for

Holdings reported by

  • Argent Wealth Management LLC (not a 13F filer in our records) · Q4 2019 – Q2 2020 · declared by one filing

Key People

Form ADV owners & control persons
Martin Pierce Cournan
OWNER
Elizabeth Ferns Giroux
OWNER
Michael Stephen Mccarthy
OWNER
Q3 2024
Q1 2025
Go to latest

Coverage begins with the second quarter of 2013. Earlier quarters are not shown while their accuracy is being verified.

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Q4 2024 13F filing summary

Period of report December 31, 2024
Filed February 07, 2025
Form 13F-HR
Reported value $556.1M
Positions 307
Change in reported value -3.1%
New positions 20
Exited positions 15
Position turnover 10.9%
Top-10 concentration 17.2%

13F filings by quarter

Quarter Positions Value
Q3 2026 13F
Filed Oct 19, 2026
 301 $674.7M
Q2 2026 13F
Filed Aug 6, 2026
 306 $763.4M
Q1 2026 13F
Filed May 11, 2026
 305 $631.7M
Q4 2025 13F
Filed Feb 13, 2026
 306 $655.9M
Q3 2025 13F
Filed Nov 6, 2025
 299 $653.4M
Q2 2025 13F
Filed Aug 12, 2025
 298 $550.0M
Q1 2025 13F
Filed May 7, 2025
 303 $479.4M
Q4 2024 13F
Filed Feb 7, 2025
 307 $556.1M
Q3 2024 13F
Filed Oct 10, 2024
 302 $573.7M
Q2 2024 13F
Filed Aug 12, 2024
 302 $534.7M
Q1 2024 13F
Filed May 3, 2024
 306 $506.7M
Q4 2023 13F
Filed Feb 8, 2024
 315 $507.9M
Q3 2023 13F
Filed Nov 9, 2023
 356 $612.7M
Q2 2023 13F
Filed Aug 14, 2023
 369 $716.2M
Q1 2023 13F
Filed May 4, 2023
 385 $688.0M
Q4 2022 13F
Filed Feb 3, 2023
 393 $641.9M
Q3 2022 13F
Filed Nov 14, 2022
 410 $626.5M
Q2 2022 13F
Filed Aug 12, 2022
 422 $619.0M
Q1 2022 13F
Filed May 9, 2022
 389 $802.4M
Q4 2021 13F
Filed Feb 10, 2022
 402 $873.3M

34 earlier quarters on file — choose one from the quarter menu above.

Top 20 holdings · Q4 2024

# Holding Reported value % of portfolio
1 PRIM PRIMORIS SVCS CORP $11.2M 2.01%
2 AMSC AMERICAN SUPERCONDUCTOR CORP $10.6M 1.9%
3 AAPL APPLE INC $10.4M 1.87%
4 KTOS KRATOS DEFENSE & SEC SOLUTIONS $9.7M 1.75%
5 HCI HCI GROUP INC $9.6M 1.73%
6 TSEM TOWER SEMICONDUCTOR LTD $9.4M 1.7%
7 AVPT AVEPOINT INC $9.0M 1.62%
8 MSFT MICROSOFT CORP $8.7M 1.56%
9 NEE NEXTERA ENERGY INC $8.5M 1.52%
10 DRS LEONARDO DRS INC $8.3M 1.5%
11 CRM SALESFORCE INC $7.4M 1.32%
12 AMZN AMAZON COM INC $7.3M 1.32%
13 GWRE GUIDEWIRE SOFTWARE INC $7.3M 1.32%
14 LGND LIGAND PHARMACEUTICALS INC $7.0M 1.26%
15 AMBA AMBARELLA INC $6.6M 1.18%
16 STRL STERLING INFRASTRUCTURE INC $6.3M 1.14%
17 LINC LINCOLN EDL SVCS CORP $6.3M 1.14%
18 CLPT CLEARPOINT NEURO INC $6.3M 1.13%
19 GHM GRAHAM CORP $6.3M 1.13%
20 GS GOLDMAN SACHS GROUP INC $5.6M 1.01%

Values as reported on the Q4 2024 Form 13F. Every position is in the holdings table below.

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