ESSEX INVESTMENT MANAGEMENT CO LLC

Q2 2026 13F-HR Holdings

Location
Boston, MA
Holdings as of
6/30/2026
Date filed
8/6/2026
Form type
13F-HR
Num holdings
306
Total value ($000)
$763,374
Net value change ($000)
+131,637 (20.8%)
New positions
27
Sold out positions
26
Turnover %
15.7%
Sector allocation + QoQ delta (equities-only)
Prev filing: 5/11/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q1 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)
OUST 10,740 316.7%
WERN 10,101 NEW
AIP 8,719 182.7%
TSEM 7,165 35.2%
XMTR 5,397 NEW
BXC 5,358 NEW
TILE 4,423 NEW
CECO 4,280 45.7%
MRVL 4,133 115.3%
PGEN 4,026 NEW
Top Reduces (Value $000, Stocks/ETFs)
GSAT -11,003 -100.0%
PRIM -6,891 -100.0%
INSM -5,665 -55.3%
BVS -5,508 -100.0%
SNDX -4,648 -100.0%
AMPX -3,566 -47.5%
KTOS -3,543 -31.6%
AGIO -3,490 -100.0%
EVER -3,347 -100.0%
CRM -3,333 -100.0%
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