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Funds (13F)

Shannon River Fund Management LLC

Backtest from 16 Aug 2013 to 2 Nov 2026 · weekly · hypothetical

Watch this strategy
Return a year
+22.6%
S&P 500 +14.1%
Last 12 months
+11.7%
S&P 500 +12.1%
Sharpe ratio
0.85
S&P 500 0.78
Biggest drop
−46.5%
S&P 500 −31.8%
$10.0k$20.0k$40.0k$80.0k$160k 2013201520172019202120232025 $148k$57.0k
StrategyS&P 500 $10,000 in Shannon River Fund Management LLC from 16 Aug 2013 against the S&P 500 (total return) over the same dates, marked weekly, log scale. Hypothetical: before taxes and trading costs.

About

Copies Shannon River Fund Management LLC's quarterly 13F holdings in the companies we cover, weighted by reported value: it buys on the first trading day after each 13F is filed (up to 45 days after the quarter) and holds until the next filing. A 13F shows long US-listed positions only, at the quarter's end, so this misses shorts, cash, bonds, non-US holdings and trading within the quarter.

Shannon River Fund Management LLC's 13F holdings →

Key statistics

MeasureStrategyS&P 500
Return a year (compound)+22.6%+14.1%
Total return+1379%+470%
Last 12 months+11.7%+12.1%
Last 3 months−13.3%—
Last month−20.0%—
This year so far+8.4%—
Volatility a year25.6%16.0%
Sharpe ratio0.850.78
Biggest drop−46.5%−31.8%
Beta to the S&P 5001.241.00
Alpha a year (t-statistic)+6.2% (1.39)—
Share of weeks up58%—

Sharpe ratio uses returns above the 3-month Treasury bill rate. Alpha is the yearly return left after allowing for the strategy's exposure to the S&P 500 (CAPM); a t-statistic below about 2 means it cannot be told apart from luck.

Insights

CompanyWeightHeld sinceReturn since
TSEM9.1%——
FLEX5.6%——
AMD5.6%——
IDCC4.8%——
CLS4.7%——
COHR4.7%——
HNGE4.3%——
EXTR4.2%——
KLIC4.1%——
TWLO3.8%——
CIEN3.6%——
LYV3.6%——
RMBS3.5%——
QNT3.5%——
UTI3.5%——
ABNB3.2%——
TTWO3.1%——
OUST2.6%——
PDFS2.4%——
ALNT2.1%——
RKLB2.0%——
FFIV1.9%——
DY1.8%——
CIFR1.5%——
LION1.5%——
DLR1.5%——
GWRE1.3%——
SPHR1.2%——
GLBE1.1%——
AMPX1.1%——
APLD0.9%——
NET0.5%——
AMKR0.5%——
MU0.5%——
BW0.4%——
MXL0.3%——

Weighted by reported value in the latest 13F, held until the next filing.

PeriodReturn a yearS&P 500SharpeS&P 500Biggest dropBetaAlpha (t)
Whole backtest16 Aug 2013 to 2 Nov 2026+22.6%+14.1%0.850.78−46.5%1.24+6.2% (1.39)
2018 onwards5 Jan 2018 to 2 Nov 2026+21.9%+13.9%0.730.66−46.5%1.26+6.3% (1.04)
Last three years3 Nov 2023 to 2 Nov 2026+38.8%+21.8%1.161.16−32.3%1.54+7.2% (0.70)
Last year7 Nov 2025 to 2 Nov 2026+13.5%+14.2%0.440.84−25.3%1.70−3.7% (−0.16)
DateCompanyAction
14 Aug 2026UTIBought
14 Aug 2026TWLOBought
14 Aug 2026TTWOBought
14 Aug 2026RKLBBought
14 Aug 2026QNTBought
14 Aug 2026PDFSBought
14 Aug 2026OUSTBought
14 Aug 2026NETBought
14 Aug 2026MXLBought
14 Aug 2026MUBought
14 Aug 2026KLICBought
14 Aug 2026GLBEBought
14 Aug 2026DYBought
14 Aug 2026CIFRBought
14 Aug 2026CIENBought
14 Aug 2026BWBought
14 Aug 2026APLDBought
14 Aug 2026AMPXBought
14 Aug 2026AMKRBought
14 Aug 2026AMDBought
14 Aug 2026ALNTBought
15 May 2026UUUUBought
15 May 2026TOSTBought
15 May 2026SPHRBought
15 May 2026SNOWBought

Dated at the rebalance that made the change.

DateCompanyAction
14 Aug 2026UUUUSold
14 Aug 2026TOSTSold
14 Aug 2026SNOWSold
14 Aug 2026PLTRSold
14 Aug 2026OSISSold
14 Aug 2026MRVLSold
14 Aug 2026LGNSold
14 Aug 2026EQIXSold
14 Aug 2026AXONSold
14 Aug 2026APPSold
14 Aug 2026AMBASold
14 Aug 2026ALABSold
14 Aug 2026ADTNSold
15 May 2026WIXSold
15 May 2026USold
15 May 2026QCOMSold
15 May 2026PEGASold
15 May 2026NCNOSold
15 May 2026MUSold
15 May 2026KVYOSold
15 May 2026DOCUSold
15 May 2026CRDOSold
15 May 2026CCCSold
20 Feb 2026TSMSold
20 Feb 2026LRNSold

Dated at the rebalance that made the change.

Backtests are hypothetical and use today's listed companies only, which flatters results. Past performance does not predict future returns. This is research, not investment advice. How we backtest