StockDriftsStockDriftsTop 10 Jana Partners Management LP Holdings
| Stock | Company | % Port. | Shares | Value | Activity | Ownership | Avg. Cost | Date |
|---|---|---|---|---|---|---|---|---|
| MRCY | MERCURY SYS INC | 25.46% | 3.96M | $484.3M | -3.62%(-148.57K) | $35.88(+209.69%) | 2026-06-30 | |
| COO | COOPER COS INC | 13.5% | 3.58M | $256.9M | +0.49%(+17.32K) | $71.59(+6.40%) | 2026-06-30 | |
| SPY | STATE STR SPDR S&P 500 ETF T | 13.46% | 343.0K | $256.1M | -0.20%(-700) | $492.18(+57.74%) | 2026-06-30 | |
| LW | LAMB WESTON HLDGS INC | 12.25% | 5.39M | $232.9M | +7.71%(+386.00K) | $67.06(-20.86%) | 2026-06-30 | |
| FISV | FISERV INC | 9.44% | 3.66M | $179.6M | -17.44%(-773.52K) | $80.00(-32.01%) | 2026-06-30 | |
| MKL | MARKEL GROUP INC | 7.88% | 76.7K | $149.9M | +1.91%(+1.44K) | $1697.08(+8.85%) | 2026-06-30 | |
| ALKT | ALKAMI TECHNOLOGY INC | 6.43% | 6.75M | $122.3M | +24.24%(+1.32M) | $23.20(-10.90%) | 2026-06-30 | |
| FUN | SIX FLAGS ENTERTAINMENT CORP | 4.61% | 4.12M | $87.7M | +0.00%(+0) | $26.45(-38.00%) | 2026-06-30 | |
| PSTG | EVERPURE INC | 4.1% | 989.2K | $77.9M | new | $69.09(+17.51%) | 2026-06-30 | |
| RPD | RAPID7 INC | 2.87% | 6.75M | $54.7M | +0.09%(+6.28K) | $35.73(-63.61%) | 2026-06-30 |
| Performance Metric | 3-Year Annualized | 3-Year Cumulative | 5-Year Annualized | 5-Year Cumulative | Since First Filing (11 quarters) |
|---|---|---|---|---|---|
| Top 20 Holdings Weighted | — | — | — | — | +42.97% |
| Top 20 Holdings Unweighted | — | — | — | — | +21.92% |
Jana Partners Management LP reports $1.90B in US-listed equity holdings across 10 positions in its most recent 13F filing. Its largest disclosed positions are MRCY (25.5%), COO (13.5%) and SPY (13.5%). The top 20 holdings account for 100% of reported assets. Its disclosed equity book has returned +42.97% cumulatively over 11 quarters. Figures reflect the Q2 2026 filing.
Portfolio changes
Every reported change this quarter, grouped by direction. The signal is in the rotation, not any single trade.
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Holdings on this page are parsed from Jana Partners Management LP’s Form 13F filings with the U.S. Securities and Exchange Commission (CIK 1998597). View Jana Partners Management LP’s 13F filings on SEC