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Shannon River Fund Management LLC

Institutional InvestorSimilar funds →SEC EDGAR: CIK 1301050
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Sector Allocation

  • Technology80.9%$906.4M
  • Communication Services6.1%$68.4M
  • Industrials4.9%$55.3M
  • Consumer Discretionary3.4%$38.1M
  • Energy1.8%$20.0M
  • Financials1.5%$16.4M
  • Real Estate1.4%$15.9M

AUM History

13fpro.ai/research/fund/shannon-river-fund-management-llc-1301050

Largest positions — Q2 2026

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

13fpro.ai/research/fund/shannon-river-fund-management-llc-1301050

Shannon River Fund Management LLC 13F holdings — Q2 2026

$1.1B portfolio (+113.8% QoQ) · 37 holdings · Q2 2026 13F · top 10 are 50% of the stock portfolio

All holdings — Shannon River Fund Management LLC (Q2 2026)

37 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
CIEN$CIENCIENA CORP$39.9MNew
LYV$LYVLive Nation Entertainment, Inc.$39.6M-27%
RMBS$RMBSRAMBUS INC$38.7M-13%
QNT$QNTQuantinuum Inc.$38.4MNew
UTI$UTIUNIVERSAL TECHNICAL INSTITUTE INC$38.1MNew
ABNB$ABNBAirbnb, Inc.$35.5M+0.3%
TTWO$TTWOTAKE TWO INTERACTIVE SOFTWARE INC$34.5MNew
OUST$OUSTOuster, Inc.$28.1MNew
PDFS$PDFSPDF SOLUTIONS INC$26.2MNew
NOK$NOKNOKIA CORPadr$25.3MNew
ALNT$ALNTALLIENT INC$22.7MNew
RKLB$RKLBRocket Lab Corp$22.5MNew
FFIV$FFIVF5, INC.$21.3M+2%
DY$DYDYCOM INDUSTRIES INC$20.0MNew
CIFR$CIFRCipher Digital Inc.$16.4MNew

What changed in Q2 2026

Against the previous quarter's 13F: 22 new, 12 added to, 3 trimmed, 13 sold out. Share-count changes; largest moves by dollar size first.

New positions (22)

  • AMD$AMDADVANCED MICRO DEVICES INC$61.4M

    first bought this quarter

  • KLIC$KLICKULICKE & SOFFA INDUSTRIES INC$44.8M

    first bought this quarter

  • TWLO$TWLOTWILIO INC$41.5M

    first bought this quarter

  • CIEN$CIENCIENA CORP$39.9M

    first bought this quarter

  • QNT$QNTQuantinuum Inc.$38.4M

    first bought this quarter

  • UTI$UTIUNIVERSAL TECHNICAL INSTITUTE INC$38.1M

    first bought this quarter

+16 more in the Excel export

Added to (12)

  • IDCC$IDCCInterDigital, Inc.+241%

    now $52.2M · held 10+ qtrs, 2 adds in a row

  • CLS$CLSCELESTICA INC+162%

    now $51.1M · held 3 qtrs

  • COHR$COHRCOHERENT CORP.+47%

    now $51.0M · held 5 qtrs

  • HNGE$HNGEHinge Health, Inc.+35%

    now $46.6M · held 3 qtrs, 3 adds in a row

  • FLEX$FLEXFLEX LTD.+22%

    now $61.6M · held 10+ qtrs

  • DLR$DLRDIGITAL REALTY TRUST, INC.+197%

    now $15.9M · held 2 qtrs, 2 adds in a row

+6 more in the Excel export

Trimmed (3)

  • TSEM$TSEMTOWER SEMICONDUCTOR LTD-24%

    now $99.8M · held 10+ qtrs, 4 trims in a row

  • LYV$LYVLive Nation Entertainment, Inc.-27%

    now $39.6M · held 3 qtrs

  • RMBS$RMBSRAMBUS INC-13%

    now $38.7M · held 2 qtrs

Sold out (13)

  • MRVL$MRVLMarvell Technology, Inc.was $55.8M

    held 8 qtrs

  • AXON$AXONAXON ENTERPRISE, INC.was $20.1M

    held 2 qtrs

  • TOST$TOSTToast, Inc.was $19.4M

    held 1 qtr

  • LGN$LGNLegence Corp.was $19.1M

    held 2 qtrs

  • ADTN$ADTNADTRAN Holdings, Inc.was $15.3M

    held 1 qtr

  • UUUU$UUUUENERGY FUELS INCwas $9.3M

+7 more in the Excel export

Firm AUM (Form ADV): $904.7M as of 2025-12-31 · SEC IAPD

Share

Holdings by quarter

Every 13F Shannon River Fund Management LLC has filed, 37 earlier quarters. Pick one to see what it held then.

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

Average quality of Shannon River Fund Management's top 20 holdings: 64/100 (our AI quality score, weighted by position size; 16 of the 20 are scored)

Top 10 since filing

-14.0%

Value-weighted move of the 10 largest stock positions

Turnover

28%

Last quarter; 133% over the last 4

Top 10 weight

50%

Share of the stock portfolio in its 10 largest positions

Held 4+ quarters

25%

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 Q1 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

Shannon River Fund Management LLC disclosed 37 positions worth $1.1B in its Form 13F-HR for Q2 2026, led by $TSEM (TOWER SEMICONDUCTOR LTD) at 8.9% of the equity portfolio, followed by $FLEX and $AMD. During the quarter the fund opened 22 new positions and exited 13 — including a new stake in $AMD and a full exit from $MRVL. The portfolio is most concentrated in Technology (80.9% of disclosed assets). All figures are sourced directly from Shannon River Fund Management LLC’s Form 13F-HR filing with the SEC under CIK 1301050.

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AI-Powered Hedge Fund Analysis: Shannon River Fund Management LLC

13F Pro is an AI hedge fund tracker and stock research platform. For Shannon River Fund Management LLC (SEC CIK: 1301050), 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 Shannon River Fund Management LLC'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.