Shannon River Fund Management LLC In its 13F for Q2 2024 (holdings as of June 30, 2024, filed August 13, 2024), Shannon River Fund Management LLC reported 21 stock positions worth $581.4 million . Its top holding was Tower Semiconductor (TSEM) at 13.4% of the portfolio, followed by Cognex (CGNX, 9.9% ) and Interdigital (IDCC, 8.9% ). Compared with Q1 2024, it opened 8 new positions, sold out of 5, added to 9 and reduced 4. The biggest buy was a new position in Marvell Technology (MRVL) and the biggest sale Informatica Class A (INFA, shares −57% ).
Location NEW YORK, NY
CIK 0001301050
Portfolio Value $581.4M (Q2 2024) Holdings 21 stocks · $581.4M 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 Q1 2024 TSEM Tower Semiconductor Ltd. 1,983,350 $78.0M Add +8.2% CGNX Cognex Corp. 1,225,452 $57.3M Add +23.2% IDCC Interdigital Inc. 443,459 $51.7M Add +20.2% NVDA Nvidia Corp. 412,710 $51.0M Reduce -10.7% WIX Wix.com Ltd. 306,835 $48.8M Reduce -16.5% MRVL Marvell Technology Inc. 646,012 $45.2M New CWAN Clearwater Analytics HDS-A 2,120,918 $39.3M Add +102.8% FLEX Flex Ltd. 1,243,975 $36.7M Add +8.8% GWRE Guidewire Software Inc. 199,513 $27.5M Add +52.9% ADBE Adobe Inc. 45,563 $25.3M New DT Dynatrace Inc. 558,942 $25.0M Add +87.3% CART Maplebear Inc. 563,492 $18.1M New VRNS Varonis Systems Inc. 329,082 $15.8M New APPN Appian Corp. Class A 460,060 $14.2M Add +24.4% INFA Informatica Inc. Class A 382,967 $11.8M Reduce -57.4% TALK Talkspace Inc. 4,788,449 $11.0M Reduce -29.8% SQSP Squarespace Inc. Class A 248,345 $10.8M Add +23.8% SPT Sprout Social Inc. Class A 293,621 $10.5M New MU Micron Technology Inc. 10,263 $1.3M New AVGO Broadcom Inc. 7,040 $1.1M New CRWD CrowdStrike Holdings Inc. Class A 2,457 $941K New
Options reported separately and not counted above: SMH puts ($39.1M).
Portfolio Sells Q1 2024 → Q2 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 Q1 2024 % Of Portfolio Change To Portfolio ▲ INFA Informatica Inc. Class A Reduce -57.4% 2.03% −4.97 EQIX Equinix Inc. Sold out 0.00% −4.91 TALK Talkspace Inc. Reduce -29.8% 1.89% −3.53 WIX Wix.com Ltd. Reduce -16.5% 8.40% −2.86 TDC Teradata Corp. Sold out 0.00% −2.26 AKAM Akamai Technologies Inc. Sold out 0.00% −2.13 GTM Zoominfo Technologies Inc. Sold out 0.00% −2.01 GLBE Global-E Online Ltd. Sold out 0.00% −1.11 NVDA Nvidia Corp. Reduce -10.7% 8.77% −0.53
Portfolio Buys Q1 2024 → Q2 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 Q1 2024 % Of Portfolio Change To Portfolio ▼ MRVL Marvell Technology Inc. New 7.77% +7.77 ADBE Adobe Inc. New 4.35% +4.35 CART Maplebear Inc. New 3.12% +3.12 VRNS Varonis Systems Inc. New 2.72% +2.72 CWAN Clearwater Analytics HDS-A Add +102.8% 6.76% +2.64 SPT Sprout Social Inc. Class A New 1.80% +1.80 GWRE Guidewire Software Inc. Add +52.9% 4.73% +1.34 DT Dynatrace Inc. Add +87.3% 4.30% +1.22 CGNX Cognex Corp. Add +23.2% 9.86% +0.46 SQSP Squarespace Inc. Class A Add +23.8% 1.86% +0.24 MU Micron Technology Inc. New 0.23% +0.23 AVGO Broadcom Inc. New 0.19% +0.19 CRWD CrowdStrike Holdings Inc. Class A New 0.16% +0.16 IDCC Interdigital Inc. Add +20.2% 8.89% +0.15 TSEM Tower Semiconductor Ltd. Add +8.2% 13.41% −0.24 APPN Appian Corp. Class A Add +24.4% 2.44% −0.85 FLEX Flex Ltd. Add +8.8% 6.31% −0.97
Options Activity Q1 2024 → Q2 2024 Security Type Change vs Q1 2024 Underlying Shares Value ▼ SMH Vaneck Semiconductor ETF put New 150,000 $39.1M
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