In its 13F for Q3 2024 (holdings as of September 30, 2024, filed November 14, 2024), Twin Securities, Inc. reported 12 stock positions worth $85.6 million . Its top holding was Juniper Networks (JNPR) at 30.9% of the portfolio, followed by Endeavor Group Hold Class A (EDR, 21.0% ) and Hess (HES, 15.2% ). Compared with Q2 2024, it opened 5 new positions, sold out of 5, added to 5 and reduced 2. The biggest buy was Juniper Networks (JNPR, shares +760% ) and the biggest sale an exit from Cerevel Therapeutics (CERE).
Location New York, NY
CIK 0001351351
Portfolio Value $85.6M (Q3 2024) Holdings 12 stocks · $85.6M 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 JNPR Juniper Networks Inc. 678,257 $26.4M Add +760.3% EDR Endeavor Group Hold Class A 629,715 $18.0M Reduce -47.7% HES Hess Corp. 95,663 $13.0M Add +82.8% SMAR Smartsheet Inc. Class A 164,347 $9.1M New SRCL Stericycle Inc. 75,722 $4.6M Add +55.8% HCP Hashicorp Inc. Class A 136,356 $4.6M Reduce -17.5% VSTO Vista Outdoor Inc. 104,576 $4.1M New AXONICS INC 28,559 $2.0M Add +77.8% K Kellanova 24,500 $2.0M New AMED Amedisys Inc. 11,945 $1.2M New MANU Manchester United PLC Class A 36,266 $587K Add +7.0% NEXT Nextdecade Corp. 11,042 $52K New
Options reported separately and not counted above: EDR puts ($2.2M), X calls ($795K).
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 ▲ CERE Cerevel Therapeutics Holding Sold out 0.00% −20.55 EDR Endeavor Group Hold Class A Reduce -47.7% 21.01% −18.25 X United States Steel Corp. Sold out 0.00% −8.64 HUBS HubSpot Inc. Sold out 0.00% −3.56 ANSS Ansys Inc. Sold out 0.00% −1.74 COP Conocophillips Sold out 0.00% −1.38 HCP Hashicorp Inc. Class A Reduce -17.5% 5.39% −1.32
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 ▼ JNPR Juniper Networks Inc. Add +760.3% 30.89% +27.42 SMAR Smartsheet Inc. Class A New 10.63% +10.63 HES Hess Corp. Add +82.8% 15.18% +5.86 VSTO Vista Outdoor Inc. New 4.79% +4.79 K Kellanova New 2.31% +2.31 SRCL Stericycle Inc. Add +55.8% 5.40% +1.99 AMED Amedisys Inc. New 1.35% +1.35 AXONICS INC Add +77.8% 2.32% +1.02 NEXT Nextdecade Corp. New 0.06% +0.06 MANU Manchester United PLC Class A Add +7.0% 0.69% +0.03
Options Activity Q2 2024 → Q3 2024 Security Type Change vs Q2 2024 Underlying Shares Value ▼ HUBS HubSpot Inc. call Sold out 75,000 $44.2Mbefore exit EDR Endeavor Group Hold Class A put New 76,300 $2.2M X United States Steel Corp. call New 22,500 $795K
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 11 $195.8M EA, WBD, APGE, ROKU, KVUE Q1 2026 16 $202.3M EA, WBD, CWAN, HOLX, KVUE Q4 2025 16 $261.1M CYBR, EXAS, EA, WBD, RNAM Q3 2025 13 $198.5M VRNA, K, MRUS, COOP, CYBR Q2 2025 11 $113.0M K, HES, BPMC, SGRY, SPR Q1 2025 13 $174.1M ITCI, K, BECN, HES, HEES Q4 2024 13 $169.6M JNPR, K, HCP, SMAR, HES Q3 2024 12 $85.6M JNPR, EDR, HES, SMAR, SRCL Q2 2024 12 $82.9M EDR, CERE, HES, X, HCP Q1 2024 9 $86.1M EDR, PXD, X, SWAV, CERE