SR

Shannon River Fund Management LLC

High-turnover traderSector-focusedMomentum follower

Total reported value

$524.1M

Reporting period: 2026-03-31 · Number of holdings: 28

Shannon River Fund Management LLC disclosed 28 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $524.1M and a quarterly turnover rate of 99.4%.

Personality snowflake

Concentration
27.54
Portfolio Stability
99.4
Momentum/Contrarian
100
Sector conviction
100
Diversification
56
Sizing Uniformity
90.19

Recent moves

  • Add TSEM

    -16.4%　$17.7M

  • Add MRVL

    +49.2%　$23.7M

  • Trim ALAB

    -71.7%　-$22.7M

  • Add LYV

    +15.3%　$8.5M

  • Trim AMBA

    -61.8%　-$15.4M

  • Trim GWRE

    -50.1%　-$15.9M

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#TickerIssuerAsset SubclassWeightWeight ChangeShares Change4Q Trend
1TSEMTower Semiconductor Ltd.Stock-Tech16.88%+5.78%-16.35%
2MRVLMarvell Technology INCStock-Tech10.65%+5.62%+49.22%
3LYVLive Nation Entertainment InStock-Comm Services8.57%+2.86%+15.25%
4ABNBAirbnb Inc-class AStock-Consumer Disc5.95%+5.95%NEW
5RMBSRambus INCStock-Tech5.48%+5.48%NEW
6COHRCoherent CORPStock-Tech4.00%-0.86%-47.65%
7FLEXFlex Ltd.Stock-Tech3.89%+0.92%-0.65%
8AXONAxon Enterprise INCStock-Industrials3.84%+1.99%+129.01%
9EXTRExtreme Networks INCStock-Other3.78%-1.19%-31.06%
10TOSTToast Inc-class AStock-Tech3.70%+3.70%NEW
11LGNLegence Corp-cl AStock-Other3.64%+1.38%+0.83%
12IDCCInterdigital INCStock-Tech3.12%+0.45%+1.15%
13HNGEHinge Health Inc-aStock-Other3.07%+1.37%+78.78%
14ADTNAdtran Holdings INCStock-Other2.93%+2.93%NEW
15CLSCelestica INCStock-Tech2.88%-2.09%-50.07%
16FFIVF5 INCStock-Tech2.77%+2.77%NEW
17LIONLionsgate Studios CORPStock-Other1.90%+1.90%NEW
18GWREGuidewire Software INCStock-Tech1.79%-2.18%-50.13%
19UUUUEnergy Fuels INCStock-Energy1.77%+1.77%NEW
20SPHRSphere Entertainment CoStock-Comm Services1.64%+1.64%NEW
21AMBAAmbarella, Inc.Stock-Tech1.13%-2.22%-61.83%
22APPApplovin Corp-class AStock-Tech1.10%+1.10%NEW
23DLRDigital Realty Trust INCStock-Real Estate1.03%+1.03%NEW
24ALABAstera Labs INCStock-Tech0.99%-3.38%-71.73%
25OSISOsi Systems INCStock-Tech0.98%+0.98%NEW
26EQIXEquinix INCStock-Real Estate0.95%+0.95%NEW
27PLTRPalantir Technologies Inc-aStock-Tech0.81%—+0.64%
28SNOWSnowflake INCStock-Tech0.76%+0.76%NEW

Holding changes this quarter

Shannon River Fund Management LLC's most significant position changes for 2026-03-31: Sold out: Pegasystems INC (PEGA); Sold out: Unity Software INC (U); New buy: Airbnb Inc-class A (ABNB); Sold out: Clearwater Analytics Holdings, Inc. (CWAN); Sold out: Ncino INC (NCNO).

Position changes disclosed by Shannon River Fund Management LLC for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#TickerIssuerWeight ChangeShares ChangeAction
1TSEMTower Semiconductor Ltd.+5.8%-16.35%Trim
2MRVLMarvell Technology INC+5.6%+49.22%Add
3LYVLive Nation Entertainment In+2.9%+15.25%Add
4AXONAxon Enterprise INC+2%+129.01%Add
5LGNLegence Corp-cl A+1.4%+0.83%Add
6HNGEHinge Health Inc-a+1.4%+78.78%Add
7FLEXFlex Ltd.+0.9%-0.65%Trim
8IDCCInterdigital INC+0.5%+1.15%Add
9PLTRPalantir Technologies Inc-a—+0.64%Add
10COHRCoherent CORP-0.9%-47.65%Trim
11EXTRExtreme Networks INC-1.2%-31.06%Trim
12CLSCelestica INC-2.1%-50.07%Trim
13GWREGuidewire Software INC-2.2%-50.13%Trim
14AMBAAmbarella, Inc.-2.2%-61.83%Trim
15ALABAstera Labs INC-3.4%-71.73%Trim
16PEGAPegasystems INC—EXITSold out
17UUnity Software INC—EXITSold out
18ABNBAirbnb Inc-class A—NEWNew buy
19CWANClearwater Analytics Holdings, Inc.—EXITSold out
20NCNONcino INC—EXITSold out
21RMBSRambus INC—NEWNew buy
22KVYOKlaviyo Inc-a—EXITSold out
23CRDOCredo Technology Group Holding Ltd—EXITSold out
24TOSTToast Inc-class A—NEWNew buy
25ADTNAdtran Holdings INC—NEWNew buy
26FFIVF5 INC—NEWNew buy
27DOCUDocusign INC—EXITSold out
28LIONLionsgate Studios CORP—NEWNew buy
29UUUUEnergy Fuels INC—NEWNew buy
30SPHRSphere Entertainment Co—NEWNew buy
31CCCCcc Intelligent Solutions Ho—EXITSold out
32QCOMQualcomm INC—EXITSold out
33MUMicron Technology INC—EXITSold out
34APPApplovin Corp-class A—NEWNew buy
35DLRDigital Realty Trust INC—NEWNew buy
36OSISOsi Systems INC—NEWNew buy
37EQIXEquinix INC—NEWNew buy
38WIXWix.com Ltd.—EXITSold out
39SNOWSnowflake INC—NEWNew buy

FAQ

What is Shannon River Fund Management LLC and what type of investor is it?
Shannon River Fund Management LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $524.1M, spread across 28 disclosed positions.
What are Shannon River Fund Management LLC's largest equity positions?
Based on the latest 13F filing, Shannon River Fund Management LLC's top holdings by market value are: 1. Tower Semiconductor Ltd. (TSEM) — $88.5M (16.9%) 2. Marvell Technology INC (MRVL) — $55.8M (10.7%) 3. Live Nation Entertainment In (LYV) — $44.9M (8.6%) 4. Airbnb Inc-class A (ABNB) — $31.2M (6.0%) 5. Rambus INC (RMBS) — $28.7M (5.5%)
What changes did Shannon River Fund Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Shannon River Fund Management LLC made 39 notable position adjustments: 13 new positions were initiated, 7 existing holdings were added to, 8 positions were partially reduced, and 11 were completely exited. The largest of these moves: Sold out: Pegasystems INC (PEGA); Sold out: Unity Software INC (U); New buy: Airbnb Inc-class A (ABNB); Sold out: Clearwater Analytics Holdings, Inc. (CWAN); Sold out: Ncino INC (NCNO)
What sectors does Shannon River Fund Management LLC focus on?
Shannon River Fund Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio: • Information Technology: 72.0% • Communication Services: 12.1% • Consumer Discretionary: 7.0% • Industrials: 4.5% • Real Estate: 2.3% • Energy: 2.1%