ARDSLEY ADVISORY PARTNERS LP

Q1 2026 13F-HR Holdings

Location
Norwalk, CT
Holdings as of
3/31/2026
Date filed
5/15/2026
Form type
13F-HR
Num holdings
151
Total value ($000)
$784,360
Net value change ($000)
-126,770 (-13.9%)
New positions
48
Sold out positions
44
Turnover %
61.9%
Sector allocation + QoQ delta (equities-only)
Prev filing: 2/17/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q4 2025
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)
UTHR 29,649 NEW
MOD 19,261 4004.4%
META 14,701 1113.7%
SHLS 14,658 6881.7%
SNDK 13,416 100.9%
AMLP 10,528 NEW
AMZN 9,608 77.1%
BSX 9,413 NEW
AMAT 8,545 NEW
ANET 8,224 62.8%
Top Reduces (Value $000, Stocks/ETFs)
LLY -38,388 -89.3%
FSLR -30,695 -100.0%
LITE -25,122 -85.2%
ARGX -20,183 -100.0%
SLV -18,989 -100.0%
TE CONNECTIVITY PLC -16,722 -100.0%
AEIS -13,670 -89.4%
SHOP -12,622 -100.0%
RUN -11,841 -43.5%
GSM -9,837 -100.0%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 127,949 (16.3% 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