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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 $1,120,393,801 across 37 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-13. Its ten largest share positions make up 49.63% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001013594-26-000886

Period
2026-06-30
Reported value
$1.12B
Holdings
37
Top 10 weight
49.63%
New
22
Sold out
13

Largest buys vs the previous quarter

SecurityShares changeApprox. value
AMDnew+105,751$61.4M
KLICnew+334,781$44.8M
TWLOnew+201,352$41.5M
CIENnew+81,298$39.9M
QNTnew+469,355$38.4M

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
MRVLexited-563,573-$55.8M
TSEMreduced-121,306-$31.6M
AXONexited-47,442-$20.1M
TOSTexited-732,027-$19.4M
LGNexited-337,638-$19.1M

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, Q2 2026

Share positions as resolved from 13F-HR 0001013594-26-000886, largest first. % of portfolio is the value over $1,120,393,801, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
TSEMTOWER SEMICONDUCTOR LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 1,338,215 shares; 2024Q4: 1,085,891 shares; 2025Q1: 1,192,713 shares; 2025Q2: 1,467,504 shares; 2025Q3: 962,063 shares; 2025Q4: 602,804 shares; 2026Q1: 504,239 shares; 2026Q2: 382,933 shares 382,933$99.8M8.91%-121,306Timeline
FLEXFLEX LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 1,277,261 shares; 2024Q4: 1,009,056 shares; 2025Q1: 1,013,582 shares; 2025Q2: 1,301,916 shares; 2025Q3: 849,416 shares; 2025Q4: 313,273 shares; 2026Q1: 311,223 shares; 2026Q2: 379,834 shares 379,834$61.6M5.49%+68,611Timeline
AMDADVANCED MICRO DEVICES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 105,751 shares 105,751$61.4M5.48%newTimeline
IDCCINTERDIGITAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 472,152 shares; 2024Q4: 381,645 shares; 2025Q1: 225,002 shares; 2025Q2: 236,571 shares; 2025Q3: 178,720 shares; 2025Q4: 53,490 shares; 2026Q1: 54,104 shares; 2026Q2: 184,388 shares 184,388$52.2M4.66%+130,284Timeline
CLSCELESTICA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 553,425 shares; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 107,130 shares; 2026Q1: 53,495 shares; 2026Q2: 139,964 shares 139,964$51.1M4.56%+86,469Timeline
COHRCOHERENT CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 445,440 shares; 2025Q3: 89,256 shares; 2025Q4: 167,918 shares; 2026Q1: 87,905 shares; 2026Q2: 129,283 shares 129,283$51M4.55%+41,378Timeline
HNGEHINGE HEALTH INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 233,354 shares; 2026Q1: 417,182 shares; 2026Q2: 561,224 shares 561,224$46.6M4.16%+144,042Timeline
EXTREXTREME NETWORKS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 1,904,528 shares; 2026Q1: 1,313,061 shares; 2026Q2: 1,424,095 shares 1,424,095$46.1M4.11%+111,034Timeline
KLICKULICKE & SOFFA INDS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 334,781 shares 334,781$44.8M4%newTimeline
TWLOTWILIO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 201,352 shares 201,352$41.5M3.71%newTimeline
CIENCIENA CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 81,298 shares 81,298$39.9M3.56%newTimeline
LYVLIVE NATION ENTERTAINMENT INQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 255,433 shares; 2026Q1: 294,398 shares; 2026Q2: 216,037 shares 216,037$39.6M3.53%-78,361Timeline
RMBSRAMBUS INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 333,817 shares; 2026Q2: 291,713 shares 291,713$38.7M3.46%-42,104Timeline
QNTQUANTINUUM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 469,355 shares 469,355$38.4M3.42%newTimeline
UTIUNIVERSAL TECHNICAL INST INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 207,722 shares; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 890,113 shares 890,113$38.1M3.4%newTimeline
ABNBAIRBNB INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 247,006 shares; 2026Q2: 247,836 shares 247,836$35.5M3.17%+830Timeline
TTWOTAKE-TWO INTERACTIVE SOFTWARQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 138,029 shares 138,029$34.5M3.08%newTimeline
OUSTOUSTER INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 449,264 shares 449,264$28.1M2.51%newTimeline
PDFSPDF SOLUTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 369,776 shares 369,776$26.2M2.34%newTimeline
NOKNOKIA CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 1,906,902 shares 1,906,902$25.3M2.26%newTimeline
ALNTALLIENT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 220,237 shares 220,237$22.7M2.02%newTimeline
RKLBROCKET LAB CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 221,143 shares 221,143$22.5M2.01%newTimeline
FFIVF5 INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 50,196 shares; 2026Q2: 51,258 shares 51,258$21.3M1.9%+1,062Timeline
DYDYCOM INDS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 39,473 shares 39,473$20M1.78%newTimeline
CIFRCIPHER DIGITAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 667,931 shares 667,931$16.4M1.46%newTimeline
LIONLIONSGATE STUDIOS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 1,040,934 shares; 2026Q2: 1,050,445 shares 1,050,445$16.1M1.44%+9,511Timeline
DLRDIGITAL RLTY TR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 29,838 shares; 2026Q2: 88,764 shares 88,764$15.9M1.42%+58,926Timeline
GWREGUIDEWIRE SOFTWARE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 159,071 shares; 2024Q4: 59,532 shares; 2025Q1: 146,288 shares; 2025Q2: 150,708 shares; 2025Q3: 126,057 shares; 2025Q4: 126,057 shares; 2026Q1: 62,863 shares; 2026Q2: 113,230 shares 113,230$13.9M1.24%+50,367Timeline
SPHRSPHERE ENTERTAINMENT COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 73,345 shares; 2026Q2: 73,878 shares 73,878$12.8M1.14%+533Timeline
GLBEGLOBAL E ONLINE LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 353,200 shares 353,200$12.3M1.09%newTimeline
AMPXAMPRIUS TECHNOLOGIES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 838,887 shares 838,887$11.6M1.04%newTimeline
APLDAPPLIED DIGITAL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 265,474 shares 265,474$9.9M0.88%newTimeline
NETCLOUDFLARE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 23,589 shares 23,589$5.79M0.52%newTimeline
AMKRAMKOR TECHNOLOGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 65,895 shares 65,895$5.68M0.51%newTimeline
MUMICRON TECHNOLOGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 20,400 shares; 2026Q1: not reported; 2026Q2: 4,484 shares 4,484$5.18M0.46%newTimeline
BWBABCOCK & WILCOX ENTERPRISESQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 333,153 shares 333,153$4.7M0.42%newTimeline
MXLMAXLINEAR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 27,377 shares 27,377$3.51M0.31%newTimeline

Sold out in Q2 2026

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

SecurityShares beforeValue beforeType
MRVLMARVELL TECHNOLOGY INC563,573$55.8Mshares
AXONAXON ENTERPRISE INC47,442$20.1Mshares
TOSTTOAST INC732,027$19.4Mshares
LGNLEGENCE CORP337,638$19.1Mshares
ADTNADTRAN HOLDINGS INC1,219,976$15.3Mshares
UUUUENERGY FUELS INC507,555$9.26Mshares
AMBAAMBARELLA INC114,940$5.92Mshares
APPAPPLOVIN CORP14,480$5.76Mshares
ALABASTERA LABS INC47,394$5.19Mshares
OSISOSI SYSTEMS INC19,274$5.12Mshares
EQIXEQUINIX INC5,102$5Mshares
PLTRPALANTIR TECHNOLOGIES INC29,150$4.26Mshares
SNOWSNOWFLAKE INC26,377$3.98Mshares

How Q2 2026 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 0001013594-26-000886 base2026-08-13acceptance time not in the bulk data set