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Latest ESSEX INVESTMENT MANAGEMENT CO LLC Stock Portfolio

ESSEX INVESTMENT MANAGEMENT CO LLC Performance:
2025 Q4: 3.13%YTD: 32.73%2024: 25.26%
Performance for 2025 Q4 is 3.13%, and YTD is 32.73%, and 2024 is 25.26%.

About ESSEX INVESTMENT MANAGEMENT CO LLC and 13F Hedge Fund Stock Holdings

ESSEX INVESTMENT MANAGEMENT CO LLC is a hedge fund based in Boston, MA. On 2026-02-13, the fund reported it's updated stock portfolio. In the 13F Holdings report, ESSEX INVESTMENT MANAGEMENT CO LLC reported an equity portfolio of $655.9 Millions as of 31 Dec, 2025.

The top stock holdings of ESSEX INVESTMENT MANAGEMENT CO LLC are TSEM, KTOS, STRL. The fund has invested 3.5% of it's portfolio in TOWER SEMICONDUCTOR LTD and 2.2% of portfolio in KRATOS DEFENSE & SEC SOLUTIONS.

The fund managers got completely rid off CLEARPOINT NEURO INC (CLPT), ENVIRI CORP and SUNOPTA INC (STKL) stocks. They significantly reduced their stock positions in RANGE RES CORP (RRC), DUPONT DE NEMOURS INC (DD) and TRANE TECHNOLOGIES PLC (TT). ESSEX INVESTMENT MANAGEMENT CO LLC opened new stock positions in EXZEO GROUP INC, WINNEBAGO INDS INC (WGO) and GENTHERM INC (THRM). The fund showed a lot of confidence in some stocks as they added substantially to AXSOME THERAPEUTICS INC (AXSM), WORKIVA INC (WK) and FREIGHTOS LTD.

ESSEX INVESTMENT MANAGEMENT CO LLC Annual Return Estimates Vs S&P 500

Our best estimate is that ESSEX INVESTMENT MANAGEMENT CO LLC made a return of 3.13% in the last quarter. In trailing 12 months, it's portfolio return was 32.73%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
exzeo group inc7,058,590
winnebago inds inc4,436,540
gentherm inc4,038,420
columbus mckinnon corp n y3,587,830
daktronics inc3,536,380
octave specialty group inc3,196,200
varex imaging corp3,196,050
amerant bancorp inc3,006,300
New stocks bought by ESSEX INVESTMENT MANAGEMENT CO LLC

Additions

Ticker% Inc.
axsome therapeutics inc5,382
workiva inc5,328
freightos ltd100
identiv inc75.59
rivian automotive inc69.96
freightcar amer inc68.69
coda octopus group inc61.42
nephros inc57.05
Additions to existing portfolio by ESSEX INVESTMENT MANAGEMENT CO LLC

Reductions

Ticker% Reduced
range res corp-98.37
dupont de nemours inc-58.16
trane technologies plc-42.11
gsi technology inc-37.00
insmed inc-28.31
arcutis biotherapeutics inc-28.02
fluence energy inc-27.5
amprius technologies inc-25.9
ESSEX INVESTMENT MANAGEMENT CO LLC reduced stake in above stock

Sold off

Ticker$ Sold
sunopta inc-4,073,910
kamada ltd-2,751,250
aspen aerogels inc-2,714,630
similarweb ltd-3,541,380
american vanguard corp-2,135,650
enviri corp-4,471,450
airship ai hldgs inc-1,655,440
clearpoint neuro inc-5,065,260
ESSEX INVESTMENT MANAGEMENT CO LLC got rid off the above stocks

Sector Distribution

ESSEX INVESTMENT MANAGEMENT CO LLC has about 22.4% of it's holdings in Industrials sector.

Sector%
Industrials22.4
Technology21.5
Healthcare16.9
Others16.5
Financial Services6.1
Communication Services4.1
Consumer Cyclical3.8
Energy3.1
Consumer Defensive2.8
1.7

Market Cap. Distribution

ESSEX INVESTMENT MANAGEMENT CO LLC has about 24.6% of it's portfolio invested in the large-cap and mega-cap stocks.

Category%
SMALL-CAP28.6
MID-CAP21.9
LARGE-CAP18.5
UNALLOCATED17
MICRO-CAP7.6
MEGA-CAP6.1

Stocks belong to which Index?

About 63.1% of the stocks held by ESSEX INVESTMENT MANAGEMENT CO LLC either belong to S&P 500 or RUSSELL 2000 index.

Index%
RUSSELL 200050.8
Others36.9
S&P 50012.3
Top 5 Winners (%)%
OWLT
owlet inc
91.1 %
FLNC
fluence energy inc
71.7 %
MU
micron technology inc
70.6 %
GSAT
globalstar inc
63.0 %
TTI
tetra technologies inc del
62.3 %
Top 5 Winners ($)$
TSEM
tower semiconductor ltd
8.8 M
GSAT
globalstar inc
4.5 M
TTI
tetra technologies inc del
2.8 M
beta bionics inc
2.3 M
TVTX
travere therapeutics inc
2.3 M
Top 5 Losers (%)%
AMSC
american superconductor corp
-48.4 %
FTEK
fuel tech inc
-48.0 %
SNES
senestech inc
-47.4 %
laser photonics corp
-42.7 %
MASS
908 devices inc
-39.6 %
Top 5 Losers ($)$
AMSC
american superconductor corp
-7.1 M
KTOS
kratos defense & sec solutions
-3.4 M
DRS
leonardo drs inc
-2.9 M
MASS
908 devices inc
-1.7 M
AMPX
amprius technologies inc
-1.6 M

ESSEX INVESTMENT MANAGEMENT CO LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of ESSEX INVESTMENT MANAGEMENT CO LLC

ESSEX INVESTMENT MANAGEMENT CO LLC has 306 stocks in it's portfolio. About 19% of the portfolio is in top 10 stocks. AMSC proved to be the most loss making stock for the portfolio. TSEM was the most profitable stock for ESSEX INVESTMENT MANAGEMENT CO LLC last quarter.

Last Reported on: 13 Feb, 2026
TickerNamesorted ascending% PortfolioShares Held$ ValueType% ChangeOptions