Shannon River Fund Management LLC In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 14, 2025), Shannon River Fund Management LLC reported 14 stock positions worth $383.2 million . Its top holding was Interdigital (IDCC) at 12.1% of the portfolio, followed by Pegasystems (PEGA, 11.5% ) and Tower Semiconductor (TSEM, 11.1% ). Compared with Q4 2024, it opened 5 new positions, sold out of 8, added to 4 and reduced 5. The biggest buy was a new position in Qorvo (QRVO) and the biggest sale an exit from Wix Ltd. (wix 0 08/15/25) .
Location NEW YORK, NY
CIK 0001301050
Portfolio Value $383.2M (Q1 2025) Holdings 14 stocks · $383.2M 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 Q4 2024 IDCC Interdigital Inc. 225,002 $46.5M Reduce -41.0% PEGA Pegasystems Inc. 634,751 $44.1M Reduce -20.5% TSEM Tower Semiconductor Ltd. 1,192,713 $42.5M Add +9.8% CWAN Clearwater Analytics HDS-A 1,366,893 $36.6M Reduce -26.6% FLEX Flex Ltd. 1,013,582 $33.5M Add +0.5% QRVO Qorvo Inc. 443,100 $32.1M New ESTC Elastic NV 358,934 $32.0M New GWRE Guidewire Software Inc. 146,288 $27.4M Add +145.7% MRVL Marvell Technology Inc. 331,045 $20.4M Reduce -49.2% WIX Wix.com Ltd. 118,173 $19.3M New CART Maplebear Inc. 415,484 $16.6M Add +0.3% PLTR Palantir Technologies Inc. Class A 194,400 $16.4M New ZM Zoom Communications Inc. 108,779 $8.0M New NATL NCR Atleos Corp. 292,564 $7.7M Reduce -0.1%
Portfolio Sells Q4 2024 → Q1 2025 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 Q4 2024 % Of Portfolio Change To Portfolio ▲ WIX LTD (WIX 0 08/15/25) Sold out 0.00% −11.43 MRVL Marvell Technology Inc. Reduce -49.2% 5.32% −7.41 PYPL PayPal Holdings Inc. Sold out 0.00% −4.07 BL Blackline Inc. Sold out 0.00% −3.50 GPN Global Payments Inc. Sold out 0.00% −3.14 INFA Informatica Inc. Class A Sold out 0.00% −2.85 CFLT Confluent Inc. Class A Sold out 0.00% −1.77 TALK Talkspace Inc. Sold out 0.00% −1.76 PEGA Pegasystems Inc. Reduce -20.5% 11.51% −1.64 IDCC Interdigital Inc. Reduce -41.0% 12.14% −0.93 DOCU Docusign Inc. Sold out 0.00% −0.16 NATL NCR Atleos Corp. Reduce -0.1% 2.01% +0.26 CWAN Clearwater Analytics HDS-A Reduce -26.6% 9.56% +0.50
Portfolio Buys Q4 2024 → Q1 2025 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 Q4 2024 % Of Portfolio Change To Portfolio ▼ QRVO Qorvo Inc. New 8.37% +8.37 ESTC Elastic NV New 8.35% +8.35 GWRE Guidewire Software Inc. Add +145.7% 7.15% +5.38 WIX Wix.com Ltd. New 5.04% +5.04 PLTR Palantir Technologies Inc. Class A New 4.28% +4.28 ZM Zoom Communications Inc. New 2.09% +2.09 FLEX Flex Ltd. Add +0.5% 8.75% +1.90 CART Maplebear Inc. Add +0.3% 4.32% +1.29 TSEM Tower Semiconductor Ltd. Add +9.8% 11.10% +1.21
Options Activity Q4 2024 → Q1 2025 Security Type Change vs Q4 2024 Underlying Shares Value ▼ SPY SS SPDR S&P 500 ETF Trust-US put Sold out 150,000 $87.9Mbefore exit MRVL Marvell Technology Inc. put Sold out 217,300 $24.0Mbefore 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