Stocks/Funds/CIK 900529

ARDSLEY ADVISORY PARTNERS LP

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 900529
Assets
$656M
+52.0% YoY
Holdings
117
Lifetime alpha vs market
-2.87% annual
Average hold time
2.2 yr
median 1.8 yr

Quarterly history

Cum return +39% vs S&P +58% · α -18% lifetimeAUM $656M · peak $785MFlow $-198M (-25%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-8.61%
trims when stocks drop
when a holding falls −10%+
Middle response
-8.30%
baseline attrition
Rally response
-16.53%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
UTHRUnited Therapeutics Corp$30M4.5%+92.4%0.5 yr
AVGOBroadcom Inc.$28M4.2%+86.0%3.0 yr
SNDKSandisk Corporation$27M4.1%+1234.5%0.8 yr
AMZNAmazon.com, Inc.$22M3.4%+9.5%7.3 yr
ANETArista Networks, Inc.$21M3.2%+58.5%1.0 yr
SMTCSemtech Corporation$20M3.0%+123.5%3.3 yr
MODModine Manufacturing Com$20M3.0%+182.4%1.5 yr
SEZLSezzle Inc.$19M2.9%+81.4%0.5 yr
TEVATeva Pharmaceutical Indu$17M2.5%+96.0%2.8 yr
METAMeta Platforms, Inc.$16M2.4%-0.4%2.5 yr
RUNSunrun Inc.$15M2.3%+131.4%8.8 yr
NVDANVIDIA Corporation$15M2.3%+60.9%4.3 yr
WULFTeraWulf Inc.$15M2.3%+428.6%2.0 yr
BTSGBrightSpring Health Serv$15M2.3%+135.5%1.0 yr
SHLSShoals Technologies Grou$15M2.3%+98.2%1.8 yr

Portfolio composition (YoY)

Industry mix
Semiconductors16.0%+2.9pp$105M
Biotechnology6.0%+1.3pp$39M
Solar5.4%+2.7pp$35M
Specialty Retail5.3%+0.2pp$35M
Hardware, Equipment & Parts4.4%-4.8pp$29M
Financial - Capital Markets4.3%+2.4pp$28M
Internet Content & Information3.8%+3.3pp$25M
Software - Application3.5%-3.6pp$23M
Software - Infrastructure3.3%-5.8pp$22M
Medical - Healthcare Information Services3.3%$21M
Country
US88.9%+11.8pp
CA5.9%-3.5pp
IL2.5%-0.2pp
BR1.5%
Unknown0.5%-1.4pp
GB0.4%-2.0pp
FR0.1%
TW0.1%
Top 5: 19.4% · Top 10: 33.3% · Top 25: 59.5%

Winners

TickerPrev $PnLYoY %
WULF$8M+0.03B428.6%
AVGO$22M+0.02B86.0%
RUN$9M+0.01B131.4%
AGI$15M+0.01B66.7%
TEVA$8M+0.01B96.0%

Losers

TickerPrev $PnLYoY %

Top buys this quarter · 15

MOD Modine Manufacturing Company+$19M
META Meta Platforms, Inc.+$15M
SHLS Shoals Technologies Group, Inc+$15M
AMZN Amazon.com, Inc.+$11M
ANET Arista Networks, Inc.+$9M
EQIX Equinix, Inc.new+$8M
SKE.TO Skeena Resources Limitednew+$7M
ZM Zoom Communications, Inc.new+$7M
VZ Verizon Communications Inc.new+$6M
NOW ServiceNow, Inc.+$6M

Top sells this quarter · 15

LITE Lumentum Holdings Inc.$52M
LLY Eli Lilly and Company$32M
ALB Albemarle Corporation$29M
FSLR First Solar, Inc.exit$23M
MU Micron Technology, Inc.$22M
AEIS Advanced Energy Industries, In$22M
ARGX argenx SEexit$18M
DIS The Walt Disney Company$17M
TER Teradyne, Inc.$16M
TEL TE Connectivity Ltd.exit$15M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$656M117+96.43%+17.59%+78.84%-0.20B
2025-12-31$785M112+60.64%+17.72%+42.93%+0.07B
2025-09-30$649M98+47.96%+17.52%+30.44%-0.14B
2025-06-30$612M108+19.15%+14.94%+4.21%+0.07B
2025-03-31$432M102-12.58%+8.30%-20.88%-0.03B
2024-12-31$516M101-4.11%+24.89%-29.00%-0.02B
2024-09-30$528M109+9.25%+36.04%-26.78%-0.05B
2024-06-30$553M108-10.31%+24.49%-34.80%-0.09B
2024-03-31$696M124+2.13%+29.62%-27.49%+0.24B
2023-12-31$465M100-2.30%+26.18%-28.48%+0.04B
2023-09-30$369M90-23.15%+21.57%-44.72%-0.01B
2023-06-30$443M100-7.84%+19.42%-27.27%-0.04B
2023-03-31$455M101-21.98%-7.82%-14.16%+0.09B
2022-12-31$395M89-8.47%+7.56%-16.03%+0.06B
2022-09-30$366M71+2.19%-4.93%+7.12%-0.03B
2022-06-30$388M85-10.66%-16.11%+5.45%-0.03B