Shannon River Fund Management LLC In its 13F for Q1 2024 (holdings as of March 31, 2024, filed May 14, 2024), Shannon River Fund Management LLC reported 18 stock positions worth $449.1 million . Its top holding was Tower Semiconductor (TSEM) at 13.7% of the portfolio, followed by Wix.com (WIX, 11.3% ) and Cognex (CGNX, 9.4% ). Compared with Q4 2023, it opened 8 new positions, sold out of 7, added to 7 and reduced 3. The biggest buy was a new position in Cognex (CGNX) and the biggest sale an exit from Celestica (CLS).
Location NEW YORK, NY
CIK 0001301050
Portfolio Value $449.1M (Q1 2024) Holdings 18 stocks · $449.1M 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 2023 TSEM Tower Semiconductor Ltd. 1,833,336 $61.3M Add +45.2% WIX Wix.com Ltd. 367,563 $50.5M Reduce -21.4% CGNX Cognex Corp. 994,862 $42.2M New NVDA Nvidia Corp. 46,214 $41.8M Add +13.6% IDCC Interdigital Inc. 368,809 $39.3M Reduce -22.0% FLEX Flex Ltd. 1,143,269 $32.7M Add +2.9% INFA Informatica Inc. Class A 899,146 $31.5M Add +0.5% TALK Talkspace Inc. 6,819,103 $24.3M Add +36.4% EQIX Equinix Inc. 26,741 $22.1M New CWAN Clearwater Analytics HDS-A 1,045,914 $18.5M Add +84.2% GWRE Guidewire Software Inc. 130,532 $15.2M New APPN Appian Corp. Class A 369,977 $14.8M New DT Dynatrace Inc. 298,432 $13.9M Reduce -2.7% TDC Teradata Corp. 262,471 $10.1M New AKAM Akamai Technologies Inc. 88,035 $9.6M New GTM Zoominfo Technologies Inc. 562,632 $9.0M New SQSP Squarespace Inc. Class A 200,600 $7.3M New GLBE Global-E Online Ltd. 137,523 $5.0M Add +342.3%
Portfolio Sells Q4 2023 → Q1 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 Q4 2023 % Of Portfolio Change To Portfolio ▲ CLS Celestica Inc. Sold out 0.00% −10.21 IDCC Interdigital Inc. Reduce -22.0% 8.74% −5.46 WIX Wix.com Ltd. Reduce -21.4% 11.25% −4.66 SPT Sprout Social Inc. Class A Sold out 0.00% −4.60 VSTS Vestis Corp. Sold out 0.00% −3.87 GDDY GoDaddy Inc. Class A Sold out 0.00% −3.55 DT Dynatrace Inc. Reduce -2.7% 3.09% −1.56 AMD Advanced Micro Devices Sold out 0.00% −1.22 ZG Zillow Group Inc. Class A Sold out 0.00% −1.21 PTC PTC Inc. Sold out 0.00% −0.93
Portfolio Buys Q4 2023 → Q1 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 Q4 2023 % Of Portfolio Change To Portfolio ▼ CGNX Cognex Corp. New 9.40% +9.40 EQIX Equinix Inc. New 4.91% +4.91 NVDA Nvidia Corp. Add +13.6% 9.30% +3.72 GWRE Guidewire Software Inc. New 3.39% +3.39 APPN Appian Corp. Class A New 3.29% +3.29 TSEM Tower Semiconductor Ltd. Add +45.2% 13.65% +2.99 TDC Teradata Corp. New 2.26% +2.26 AKAM Akamai Technologies Inc. New 2.13% +2.13 GTM Zoominfo Technologies Inc. New 2.01% +2.01 TALK Talkspace Inc. Add +36.4% 5.42% +1.91 SQSP Squarespace Inc. Class A New 1.63% +1.63 CWAN Clearwater Analytics HDS-A Add +84.2% 4.12% +0.97 GLBE Global-E Online Ltd. Add +342.3% 1.11% +0.77 INFA Informatica Inc. Class A Add +0.5% 7.01% −0.02 FLEX Flex Ltd. Add +2.9% 7.28% −2.09
Options Activity Q4 2023 → Q1 2024 Security Type Change vs Q4 2023 Underlying Shares Value ▼ IDCC Interdigital Inc. put Sold out 472,800 $51.3Mbefore exit IWM iShares Russell 2000 ETF put Sold out 200,000 $40.1Mbefore exit SMH Vaneck Semiconductor ETF put Sold out 160,000 $28.0Mbefore exit QQQ Invesco QQQ Trust Series 1 put Sold out 60,000 $24.6Mbefore exit CLS Celestica Inc. put Sold out 800,500 $23.4Mbefore exit WIX Wix.com Ltd. put Sold out 150,000 $18.5Mbefore 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