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Shannon River Fund Management LLC

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13F filer, CIK 1301050, NEW YORK, NY

Shannon River Fund Management LLC reported $383,228,663 across 14 holdings for the quarter ended 2025-03-31, in a 13F-HR filed 2025-05-14. Its ten largest share positions make up 87.29% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001013594-25-000645

Period
2025-03-31
Reported value
$383M
Holdings
14
Top 10 weight
87.29%
New
5
Sold out
10

Largest buys vs the previous quarter

SecurityShares changeApprox. value
QRVOnew+443,100$32.1M
ESTCnew+358,934$32M
WIXnew+118,173$19.3M
PLTRnew+194,400$16.4M
GWREadded+86,756$16.3M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
WIX COM LTDexited-301,446-$64.7M
IDCCreduced-156,643-$32.4M
PYPLexited-269,470-$23M
BLexited-326,313-$19.8M
MRVLreduced-321,162-$19.8M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q1 2025

Share positions as resolved from 13F-HR 0001013594-25-000645, largest first. % of portfolio is the value over $383,228,663, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
IDCCINTERDIGITAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 472,152 shares; 2024Q4: 381,645 shares; 2025Q1: 225,002 shares 225,002$46.5M12.14%-156,643Timeline
PEGAPEGASYSTEMS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 788,367 shares; 2024Q4: 798,356 shares; 2025Q1: 634,751 shares 634,751$44.1M11.51%-163,605Timeline
TSEMTOWER SEMICONDUCTOR LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,338,215 shares; 2024Q4: 1,085,891 shares; 2025Q1: 1,192,713 shares 1,192,713$42.5M11.1%+106,822Timeline
CWANCLEARWATER ANALYTICS HLDGS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,448,779 shares; 2024Q4: 1,862,813 shares; 2025Q1: 1,366,893 shares 1,366,893$36.6M9.56%-495,920Timeline
FLEXFLEX LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,277,261 shares; 2024Q4: 1,009,056 shares; 2025Q1: 1,013,582 shares 1,013,582$33.5M8.75%+4,526Timeline
QRVOQORVO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 443,100 shares 443,100$32.1M8.37%newTimeline
ESTCELASTIC N VQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 358,934 shares 358,934$32M8.35%newTimeline
GWREGUIDEWIRE SOFTWARE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 159,071 shares; 2024Q4: 59,532 shares; 2025Q1: 146,288 shares 146,288$27.4M7.15%+86,756Timeline
MRVLMARVELL TECHNOLOGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 696,804 shares; 2024Q4: 652,207 shares; 2025Q1: 331,045 shares 331,045$20.4M5.32%-321,162Timeline
WIXWIX COM LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 296,411 shares; 2024Q4: not reported; 2025Q1: 118,173 shares 118,173$19.3M5.04%newTimeline
CARTMAPLEBEAR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 440,336 shares; 2024Q4: 414,065 shares; 2025Q1: 415,484 shares 415,484$16.6M4.32%+1,419Timeline
PLTRPALANTIR TECHNOLOGIES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 194,400 shares 194,400$16.4M4.28%newTimeline
ZMZOOM COMMUNICATIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 108,779 shares 108,779$8.02M2.09%newTimeline
NATLNCR ATLEOS CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 293,000 shares; 2025Q1: 292,564 shares 292,564$7.72M2.01%-436Timeline

Sold out in Q1 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
SPYSTATE STR SPDR S&P 500 ETF T150,000$87.9Mput
WIX COM LTDWIX COM LTD301,446$64.7Mshares
MRVLMARVELL TECHNOLOGY INC217,300$24Mput
PYPLPAYPAL HLDGS INC269,470$23Mshares
BLBLACKLINE INC326,313$19.8Mshares
GPNGLOBAL PMTS INC158,356$17.7Mshares
INFORMATICA INCINFORMATICA INC622,431$16.1Mshares
CFLTCONFLUENT INC-CLASS A359,019$10Mshares
TALKTALKSPACE INC3,226,598$9.97Mshares
DOCUDOCUSIGN INC10,000$899Kshares

How Q1 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001013594-25-000645 base2025-05-14acceptance time not in the bulk data set