JANA Partners Management, LP
Net seller this quarter
$1.9B
10
-$45.7M
100.0%
Holdings
| Company | Value | % of portfolio | % of company | POSITION CHANGE qoq % | First reported |
|---|---|---|---|---|---|
| Q2 2026 | |||||
 MRCY | $484M | 25.46% | 6.59% | -3.6% | Q3 2023 |
 COO | $257M | 13.50% | 1.84% | +0.5% | Q3 2025 |
 SPY | $256M | 13.46% | Not reported | -0.2% | Q3 2023 |
 LW | $233M | 12.25% | 3.91% | +7.7% | Q3 2024 |
 FISV | $180M | 9.44% | 0.69% | -17.4% | Q4 2025 |
 MKL | $150M | 7.88% | 0.61% | +1.9% | Q4 2024 |
 ALKT | $122M | 6.43% | 6.31% | +24.2% | Q3 2025 |
 FUN | $87.7M | 4.61% | 4.02% | Not reported | Q3 2025 |
 P | $77.9M | 4.10% | 0.30% | -5.1% | Q1 2026 |
 RPD | $54.7M | 2.87% | 10.03% | +0.1% | Q2 2024 |
| Q1 2026 | |||||
| MRCY | $299M | 17.96% | 6.90% | -17.2% | Q3 2023 |
| COO | $255M | 15.29% | 1.83% | +1.3% | Q3 2025 |
| FISV | $248M | 14.84% | 0.83% | +97.5% | Q4 2025 |
| SPY | $223M | 13.40% | Not reported | -12.2% | Q3 2023 |
| LW | $212M | 12.69% | 3.63% | Not reported | Q3 2024 |
| MKL | $144M | 8.64% | 0.60% | -7.3% | Q4 2024 |
| ALKT | $85.1M | 5.10% | 5.12% | +11.0% | Q3 2025 |
| FUN | $73.1M | 4.38% | 4.04% | Not reported | Q3 2025 |
| P | $61.5M | 3.69% | 0.32% | New | Q1 2026 |
| RPD | $37.2M | 2.23% | 10.10% | Not reported | Q2 2024 |
| EHAB | $29.5M | 1.77% | 4.12% | Not reported | Q3 2023 |
| Q4 2025 | |||||
| MRCY | $362M | 18.84% | 8.35% | -16.8% | Q3 2023 |
| COO | $288M | 15.01% | 1.80% | +44.6% | Q3 2025 |
| SPY | $267M | 13.89% | Not reported | +1.2% | Q3 2023 |
| LW | $210M | 10.92% | 3.61% | Not reported | Q3 2024 |
| MKL | $175M | 9.08% | 0.64% | -44.9% | Q4 2024 |
| FISV | $151M | 7.85% | 0.42% | New | Q4 2025 |
| THS | $137M | 7.15% | 11.53% | Not reported | Q3 2023 |
| ALKT | $113M | 5.88% | 4.61% | +158.7% | Q3 2025 |
| RPD | $103M | 5.33% | 10.24% | +3.7% | Q2 2024 |
| FUN | $63.1M | 3.29% | 4.05% | +1.6% | Q3 2025 |
 FRPT | $34M | 1.77% | 1.14% | -46.8% | Q3 2023 |
| EHAB | $19.3M | 1.00% | 4.12% | -2.2% | Q3 2023 |
| Q3 2025 | |||||
| MRCY | $461M | 22.33% | 10.03% | -11.8% | Q3 2023 |
| LW | $291M | 14.08% | 3.59% | -30.8% | Q3 2024 |
| MKL | $282M | 13.64% | 1.17% | -2.7% | Q4 2024 |
| SPY | $258M | 12.47% | Not reported | -24.6% | Q3 2023 |
| COO | $167M | 8.08% | 1.22% | New | Q3 2025 |
 TRMB | $154M | 7.44% | 0.79% | -47.9% | Q4 2023 |
| RPD | $122M | 5.90% | 9.95% | +13.5% | Q2 2024 |
| THS | $118M | 5.70% | 11.53% | Not reported | Q3 2023 |
| FUN | $92M | 4.45% | 4.00% | New | Q3 2025 |
| FRPT | $57.8M | 2.80% | 2.15% | +4.1% | Q3 2023 |
| ALKT | $47M | 2.28% | 1.80% | New | Q3 2025 |
| EHAB | $17.1M | 0.83% | 4.22% | Not reported | Q3 2023 |