ARDSLEY ADVISORY PARTNERS LP

Q2 2026 13F-HR Holdings

Location
Norwalk, CT
Holdings as of
6/30/2026
Date filed
7/13/2026
Form type
13F-HR
Num holdings
145
Total value ($000)
$960,212
Net value change ($000)
+175,852 (22.4%)
New positions
58
Sold out positions
45
Turnover %
49.0%
Sector allocation + QoQ delta (equities-only)
Prev filing: 5/15/2026 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)
AMD 52,398 3220.5%
SNDK 29,982 112.3%
PSTG 18,302 NEW
SEZL 17,913 94.3%
PANW 14,638 NEW
ARM 13,901 510.5%
PRIM 13,384 NEW
AAPL 13,005 NEW
ONTO 11,921 NEW
SNX 11,629 NEW
Top Reduces (Value $000, Stocks/ETFs)
ANET -21,327 -100.0%
AVGO -19,788 -71.4%
META -16,021 -100.0%
NVDA -15,260 -100.0%
UTHR -13,394 -45.2%
SMTC -12,612 -63.4%
BSX -9,413 -100.0%
AMAT -8,545 -100.0%
MOD -7,726 -39.1%
LSCC -7,560 -100.0%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 39,144 (4.1% of total reported value)
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