Shannon River Fund Management LLC In its 13F for Q3 2024 (holdings as of September 30, 2024, filed November 13, 2024), Shannon River Fund Management LLC reported 18 stock positions worth $661.7 million . Its top holding was Interdigital (IDCC) at 10.1% of the portfolio, followed by Clearwater Analytics HDS-A (CWAN, 9.3% ) and Tower Semiconductor (TSEM, 9.0% ). Compared with Q2 2024, it opened 4 new positions, sold out of 7, added to 8 and reduced 6. The biggest buy was a new position in Pegasystems (PEGA) and the biggest sale an exit from Nvidia (NVDA).
Location NEW YORK, NY
CIK 0001301050
Portfolio Value $661.7M (Q3 2024) Holdings 18 stocks · $661.7M Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q2 2024 IDCC Interdigital Inc. 472,152 $66.9M Add +6.5% CWAN Clearwater Analytics HDS-A 2,448,779 $61.8M Add +15.5% TSEM Tower Semiconductor Ltd. 1,338,215 $59.2M Reduce -32.5% PEGA Pegasystems Inc. 788,367 $57.6M New MRVL Marvell Technology Inc. 696,804 $50.3M Add +7.9% WIX Wix.com Ltd. 296,411 $49.6M Reduce -3.4% CGNX Cognex Corp. 1,068,933 $43.3M Reduce -12.8% FLEX Flex Ltd. 1,277,261 $42.7M Add +2.7% INFA Informatica Inc. Class A 1,601,803 $40.5M Add +318.3% ADBE Adobe Inc. 77,379 $40.1M Add +69.8% GWRE Guidewire Software Inc. 159,071 $29.1M Reduce -20.3% CLS Celestica Inc. 553,425 $28.3M New DT Dynatrace Inc. 501,536 $26.8M Reduce -10.3% PYPL PayPal Holdings Inc. 278,900 $21.8M New CART Maplebear Inc. 440,336 $17.9M Reduce -21.9% SQSP Squarespace Inc. Class A 264,360 $12.3M Add +6.5% TALK Talkspace Inc. 4,899,355 $10.2M Add +2.3% UTI Universal Technical Institut 207,722 $3.4M New
Options reported separately and not counted above: IWM puts ($53.0M).
Portfolio Sells Q2 2024 → Q3 2024 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q2 2024 % Of Portfolio Change To Portfolio ▲ NVDA Nvidia Corp. Sold out 0.00% −8.77 TSEM Tower Semiconductor Ltd. Reduce -32.5% 8.95% −4.46 CGNX Cognex Corp. Reduce -12.8% 6.54% −3.31 VRNS Varonis Systems Inc. Sold out 0.00% −2.72 APPN Appian Corp. Class A Sold out 0.00% −2.44 SPT Sprout Social Inc. Class A Sold out 0.00% −1.80 WIX Wix.com Ltd. Reduce -3.4% 7.49% −0.91 CART Maplebear Inc. Reduce -21.9% 2.71% −0.40 GWRE Guidewire Software Inc. Reduce -20.3% 4.40% −0.33 DT Dynatrace Inc. Reduce -10.3% 4.05% −0.25 MU Micron Technology Inc. Sold out 0.00% −0.23 AVGO Broadcom Inc. Sold out 0.00% −0.19 CRWD CrowdStrike Holdings Inc. Class A Sold out 0.00% −0.16
Portfolio Buys Q2 2024 → Q3 2024 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q2 2024 % Of Portfolio Change To Portfolio ▼ PEGA Pegasystems Inc. New 8.71% +8.71 CLS Celestica Inc. New 4.28% +4.28 INFA Informatica Inc. Class A Add +318.3% 6.12% +4.09 PYPL PayPal Holdings Inc. New 3.29% +3.29 CWAN Clearwater Analytics HDS-A Add +15.5% 9.34% +2.59 ADBE Adobe Inc. Add +69.8% 6.05% +1.70 IDCC Interdigital Inc. Add +6.5% 10.11% +1.21 UTI Universal Technical Institut New 0.51% +0.51 FLEX Flex Ltd. Add +2.7% 6.45% +0.14 SQSP Squarespace Inc. Class A Add +6.5% 1.85% −0.01 MRVL Marvell Technology Inc. Add +7.9% 7.59% −0.17 TALK Talkspace Inc. Add +2.3% 1.55% −0.35
Options Activity Q2 2024 → Q3 2024 Security Type Change vs Q2 2024 Underlying Shares Value ▼ IWM iShares Russell 2000 ETF put New 2,400 $53.0M SMH Vaneck Semiconductor ETF put Sold out 150,000 $39.1Mbefore exit
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 37 $1.1B TSEM, FLEX, AMD, IDCC, CLS Q1 2026 28 $524.1M TSEM, MRVL, LYV, ABNB, RMBS Q4 2025 26 $637.5M TSEM, PEGA, U, LYV, MRVL Q3 2025 20 $621.2M PEGA, TSEM, IDCC, WIX, FLEX Q2 2025 22 $649.3M PEGA, FLEX, TSEM, MRVL, IDCC Q1 2025 14 $383.2M IDCC, PEGA, TSEM, CWAN, FLEX Q4 2024 17 $565.7M PEGA, IDCC, MRVL, WIX LTD (WIX 0 08/15/25), TSEM Q3 2024 18 $661.7M IDCC, CWAN, TSEM, PEGA, MRVL Q2 2024 21 $581.4M TSEM, CGNX, IDCC, NVDA, WIX Q1 2024 18 $449.1M TSEM, WIX, CGNX, NVDA, IDCC