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ARDSLEY ADVISORY PARTNERS LP

Institutional InvestorSimilar funds →SEC EDGAR: CIK 900529
Institutional-grade research for retail investors

Sector Allocation

  • Technology49.8%$458.3M
  • Healthcare11.9%$109.9M
  • Financials10.3%$94.7M
  • Industrials8.7%$80.0M
  • Energy4.5%$41.7M
  • Consumer Discretionary4.2%$38.7M
  • Materials3.9%$36.3M
  • Other3.1%$28.7M
  • Utilities1.7%$15.8M
  • Real Estate1.1%$10.4M

AUM History

13fpro.ai/research/fund/ardsley-advisory-partners-lp-900529

Conviction and streaks

Diversifying · top 10 = 31.6%

From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.

SNDK$SNDKConviction hold6.2% weight · held 4 quartersWULF$WULFConviction hold2.6% weight · held 7 quartersBTSG$BTSGConviction hold2.5% weight · held 5 quartersEBAY$EBAYConviction hold2.4% weight · held 4 quartersRUN$RUNConviction hold2.3% weight · held 7 quartersEBAY$EBAYAccumulating+659% shares · 5 quarters runningPANW$PANWAccumulating+975% shares · 4 quarters runningGSM$GSMAccumulating+31% shares · 4 quarters runningTAC$TACAccumulating+229% shares · 4 quarters running$Accumulating+418% shares · 3 quarters runningWULF$WULFTrimming-68% shares · 5 quarters runningAGI$AGITrimming-81% shares · 4 quarters runningMP$MPTrimming-98% shares · 4 quarters runningSNDK$SNDKTrimming-75% shares · 3 quarters runningHUT$HUTTrimming-89% shares · 3 quarters running

Largest positions — Q2 2026

Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.

13fpro.ai/research/fund/ardsley-advisory-partners-lp-900529

ARDSLEY ADVISORY PARTNERS LP 13F holdings — Q2 2026

$960.2M portfolio (+22.4% QoQ) · 145 holdings · Q2 2026 13F · top 10 are 32% of the stock portfolio

Includes $39.1M of put/call options ($4.0M puts, $35.1M calls), which 13F rules report at the value of the underlying shares, not the premium at risk. Stocks alone: $921.1M. Weights use the stock portfolio.

All holdings — ARDSLEY ADVISORY PARTNERS LP (Q2 2026)

145 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.

Company
SHLS$SHLSShoals Technologies Group, Inc.$16.5M-26%
AMZN$AMZNAMAZON COM INC$16.4M-35%
UTHR$UTHRUNITED THERAPEUTICS Corp$16.3M-40%
TEVA$TEVATEVA PHARMACEUTICAL INDUSTRIES LTDadr$15.8M-16%
GOOG$GOOGAlphabet Inc.$15.3M+45%
PANW$PANWPalo Alto Networks Inc$14.6MNew
TWLO$TWLOTWILIO INC$14.2M+46%
PRIM$PRIMPrimoris Services Corp$13.4MNew
AAPL$AAPLApple Inc.$13.0MNew
ZM$ZMZoom Communications, Inc.$12.5M+75%
MOD$MODMODINE MANUFACTURING CO$12.0M-51%
ONTO$ONTOONTO INNOVATION INC.$11.9MNew
SNX$SNXTD SYNNEX CORP$11.6MNew
BKD$BKDCALLBrookdale Senior Living Inc.$11.1M—
ENPH$ENPHEnphase Energy, Inc.$10.8M+159%

What changed in Q2 2026

Against the previous quarter's 13F: 68 new, 29 added to, 33 trimmed, 74 sold out. Share-count changes; largest moves by dollar size first.

New positions (68)

  • EVERPURE INC - CL A$18.3M

    first bought this quarter

  • PANW$PANWPalo Alto Networks Inc$14.6M

    first bought this quarter

  • PRIM$PRIMPrimoris Services Corp$13.4M

    first bought this quarter

  • AAPL$AAPLApple Inc.$13.0M

    first bought this quarter

  • ONTO$ONTOONTO INNOVATION INC.$11.9M

    first bought this quarter

  • SNX$SNXTD SYNNEX CORP$11.6M

    first bought this quarter

+62 more in the Excel export

Added to (29)

  • AMD$AMDADVANCED MICRO DEVICES INC+1063%

    now $54.0M · held 2 qtrs, 2 adds in a row

  • ARM$ARMARM HOLDINGS PLC /UK+161%

    now $16.6M · held 2 qtrs, 2 adds in a row

  • EBAY$EBAYEBAY INC+43%

    now $22.3M · held 4 qtrs, 4 adds in a row

  • ENPH$ENPHEnphase Energy, Inc.+159%

    now $10.8M · held 3 qtrs, 3 adds in a row

  • RUN$RUNSunrun Inc.+41%

    now $21.4M · held 7+ qtrs

  • BE$BEBloom Energy Corp+138%

    now $9.4M · held 5 qtrs

+23 more in the Excel export

Trimmed (33)

  • SNDK$SNDKSandisk Corp-40%

    now $56.7M · held 4 qtrs, 3 trims in a row

  • SMTC$SMTCSEMTECH CORP-83%

    now $7.3M · held 4 qtrs

  • AVGO$AVGOBroadcom Inc.-77%

    now $7.9M · held 7+ qtrs

  • SEZL$SEZLSezzle Inc.-28%

    now $36.9M · held 3 qtrs

  • MOD$MODMODINE MANUFACTURING CO-51%

    now $12.0M · held 3 qtrs

  • UTHR$UTHRUNITED THERAPEUTICS Corp-40%

    now $16.3M · held 2 qtrs

+27 more in the Excel export

Sold out (74)

  • SPY$SPYCALLSPDR S&P 500 ETF TRUSTwas $31.9M
  • ANET$ANETArista Networks, Inc.was $21.3M

    held 4 qtrs

  • META$METAMeta Platforms, Inc.was $16.0M

    held 2 qtrs

  • AVGO$AVGOCALLBroadcom Inc.was $15.5M
  • NVDA$NVDANVIDIA CORPwas $15.3M

    held 5 qtrs

  • AMZN$AMZNCALLAMAZON COM INCwas $10.0M

+68 more in the Excel export

Firm AUM (Form ADV): $1.6B as of 2025-12-31 · SEC IAPD

Share

Holdings by quarter

Every 13F ARDSLEY ADVISORY PARTNERS LP has filed, 39 earlier quarters. Pick one to see what it held then.

Email me the moment this fund files its next 13FPro

Is it too late to follow ARDSLEY ADVISORY PARTNERS?

Q2 2026 13F filed with the SEC on Jul 13, 2026. Prices are closing prices as of Oct 26, 2026.

Average quality of ARDSLEY ADVISORY PARTNERS's top 20 holdings: 69/100 (our AI quality score, weighted by position size; 18 of the 20 are scored)

Top 10 since filing

-19.3%

Value-weighted move of the 10 largest stock positions

Turnover

47%

Last quarter; 172% over the last 4

Top 10 weight

32%

Share of the stock portfolio in its 10 largest positions

Held 4+ quarters

38%

Share of portfolio value in positions held a year or more

Highest-quality names it owns(among its 100 largest positions)

The 8 highest-scoring companies in this portfolio are a Pro feature.

How these are measured
  • Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
  • Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
  • Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q4 2024 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
  • Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
  • Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.

Portfolio Overview

ARDSLEY ADVISORY PARTNERS LP disclosed 145 positions worth $960.2M in its Form 13F-HR for Q2 2026 — $921.1M in common stock plus $39.1M of put/call option positions (reported at underlying notional value, not premium at risk), led by $SNDK (Sandisk Corp) at 6.2% of the equity portfolio, followed by $AMD and $SEZL. During the quarter the fund opened 68 new positions and exited 74 and a full exit from $SPY. The portfolio is most concentrated in Technology (49.8% of disclosed assets). All figures are sourced directly from ARDSLEY ADVISORY PARTNERS LP’s Form 13F-HR filing with the SEC under CIK 900529.

Funds like this

managers whose biggest positions overlap ARDSLEY ADVISORY PARTNERS's
Whale Rock Capital Management LLC$12.46B 13F book · 6 shared top holdingsSNDKVIAVTWLOBEClear Street Group Inc.$39.52B 13F book · 6 shared top holdingsSNDKBELITEGLWMarex Group plc$23.57B 13F book · 6 shared top holdingsSNDKLITEGLWARMSUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC$5.69B 13F book · 5 shared top holdingsSNDKONTOTWLOHUTBIT Capital GmbH$3.38B 13F book · 6 shared top holdingsSNDKWULFOSCRCIFRHel Ved Capital Management Ltd$1.36B 13F book · 7 shared top holdingsSNDKWULFHUTCIFR

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AI-Powered Hedge Fund Analysis: ARDSLEY ADVISORY PARTNERS LP

13F Pro is an AI hedge fund tracker and stock research platform. For ARDSLEY ADVISORY PARTNERS LP (SEC CIK: 900529), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.

Every holding in ARDSLEY ADVISORY PARTNERS LP's portfolio is scored on an AI quality ranking built from its SEC filings (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.