ESSEX INVESTMENT MANAGEMENT CO LLC

CIK 0000201772 · Q1 2026

13F Equity AUM

$631.7M

-3.7% QoQ

Positions

304

-1 QoQ

AUM Rank

#3,745

Top 30%

Skill Alpha (FF)

-1.1%/yr^ns

No Clear Edge

Rank #3,939 · Top 48%

vs S&P -1.2%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 11.3%Top 10: 19.9%Top 20: 33.2%

TSEM3.2%

LINC2.3%

UAO2.1%

KINIKSA PHARMACEUTICALS INTL P1.9%

LGND1.9%

DRS1.8%

KTOS1.8%

GSAT1.7%

IM8N1.6%

GHM1.6%

Others (294)80.1%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

Industrials25.5%

Technology24.7%

Healthcare21.5%

Financial Services5.9%

Consumer Defensive4.5%

Energy4.2%

Communication Services3.7%

Consumer Cyclical3.6%

Other6.4%

Portfolio weight by GICS sector based on latest 13F filing. Sectors below 2% are grouped as “Other.”

Position Sizing

Positions: 304Median: 0.12%Avg: 0.33%

0–0.5%

227(27.0%)

0.5–1%

53(35.5%)

1–3%

23(34.2%)

3–5%

1(3.2%)

5%+

0(0.0%)

Count of positions per weight bucket — (%) = combined portfolio weight

Loading summary cards...

Portfolio Overlap

Shared: 277Unique: 27vs 20 funds

3.8%Low

304

Fund positions

7,299

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

Most Similar Funds

Top 9 benchmark funds with highest portfolio overlap (Jaccard similarity)

VANGUARD CAPITAL MANAGEMENT LLC

7.6%

GEODE CAPITAL MANAGEMENT, LLC

7.4%

BlackRock, Inc.

6.2%

MORGAN STANLEY

4.7%

STATE STREET CORP

6.7%

BANK OF AMERICA CORP /DE/

4.8%

JPMORGAN CHASE & CO

4.5%

VANGUARD PORTFOLIO MANAGEMENT LLC

7.6%

FMR LLC

6.7%

Jaccard similarity per fund: shared CUSIPs / (fund A + fund B − shared). Higher values indicate more similar portfolios.

Loading overlap analysis...

Position Changes This Quarter

New28Increased83Decreased86Exited29

New Positions

NVCR0.8%

+452K

SNDX0.7%

+199K

MG0.6%

+269K

MITK0.6%

+276K

MRVL0.6%

+36K

AGIO0.6%

+103K

SOPH0.5%

+693K

DIOD0.5%

+49K

APYX0.5%

+901K

RSKD0.5%

+803K

Increased

RPID0.3%

+822K(+1318%)

CRGOW0.3%

+379K(+61%)

BWAY1.3%

+314K(+103%)

IDN0.6%

+216K(+67%)

BVS0.9%

+215K(+56%)

LPZB0.3%

+176K(+429%)

CODA0.3%

+166K(+714%)

NMTC0.0%

+74K(+39%)

DCBO0.5%

+71K(+71%)

OPTT0.0%

+31K(+18%)

Decreased

ADPT1.1%

-130,814(-21%)

TSEM3.2%

-76,695(-40%)

AMPX1.2%

-71,324(-14%)

OSS0.0%

-33,822(-49%)

LINC2.3%

-33,515(-9%)

KTOS1.8%

-31,350(-16%)

EVER0.5%

-14,349(-6%)

FLNC0.1%

-12,982(-34%)

UAO2.1%

-12,628(-28%)

GHM1.6%

-12,397(-9%)

Exited

-217,796

-177,374

-360,544

-109,490

-235,595

-301,986

-228,305

-1,391,697

-345,977

-267,857

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

Loading position changes...

Holdings

Loading holdings...