ESSEX INVESTMENT MANAGEMENT CO LLC

Q3 2026 13F-HR Holdings

Location
Boston, MA
Holdings as of
9/30/2026
Date filed
10/19/2026
Form type
13F-HR
Num holdings
301
Total value ($000)
$674,703
Net value change ($000)
-88,671 (-11.6%)
New positions
21
Sold out positions
26
Turnover %
9.6%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/6/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q2 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
WTS 4,243 212150.0%
ACOG 3,806 NEW
NUVB 3,719 97.6%
NVDA 3,702 NEW
LGIH 3,664 NEW
ISSC 3,433 NEW
FENC 3,395 NEW
OCFC 3,288 NEW
LTRX 2,524 64.8%
KRNT 2,365 NEW
Top Reduces (Value $000, Stocks/ETFs)
LINC -10,900 -64.2%
OUST -7,962 -56.3%
AIP -7,133 -52.9%
TSEM -6,695 -24.3%
AGX -6,676 -54.1%
STRL -5,920 -43.7%
CXDO -5,310 -100.0%
GHM -5,071 -43.9%
TTI -4,182 -49.8%
ORN -3,777 -50.7%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type