JANA Partners Management, LP
In its 13F for Q2 2025 (holdings as of June 30, 2025, filed August 14, 2025), JANA Partners Management, LP reported 10 stock positions worth $2.0 billion. Its top holding was Lamb Weston (LW) at 18.8% of the portfolio, followed by Mercury Systems (MRCY, 18.3%) and SS SPDR S&P 500 ETF Trust-US (SPY, 15.9%). Compared with Q1 2025, it opened 1 new position, sold out of 1, added to 3 and reduced 5. The biggest buy was a new position in Wex (WEX) and the biggest sale Lamb Weston (LW, shares −9%).
- Most Recent 13F
- Q2 2026
- Location
- NEW YORK, NY
- CIK
- 0001998597
- Portfolio Value
- $2.0B (Q2 2025)
- SEC Filing
- 0000902664-25-003587 ↗ filed Aug 14, 2025
Holdings Value
Holdings 10 stocks · $2.0B
| LW Lamb Weston Holdings Inc. | 18.83% | 7,232,219 | $375.0M | Reduce -9.4% |
| MRCY Mercury Systems Inc. | 18.27% | 6,753,413 | $363.7M | Reduce -2.7% |
| SPY SS SPDR S&P 500 ETF Trust-US | 15.92% | 513,053 | $317.0M | Reduce -5.0% |
| MKL Markel Group Inc. | 15.19% | 151,432 | $302.5M | Reduce -2.9% |
| TRMB Trimble Inc. | 13.77% | 3,608,897 | $274.2M | Reduce -8.5% |
| RPD RAPID7 Inc. | 6.66% | 5,729,914 | $132.5M | Add +39.5% |
| THS Treehouse Foods Inc. | 5.68% | 5,821,337 | $113.1M | Add +18.5% |
| FRPT Freshpet Inc. | 3.44% | 1,006,763 | $68.4M | Add +37.0% |
| WEX Wex Inc. | 1.21% | 164,029 | $24.1M | New |
| EHAB Enhabit Inc. | 1.03% | 2,137,145 | $20.6M | No change |
Portfolio Sells Q1 2025 → Q2 2025
| LW Lamb Weston Holdings Inc. | Reduce -9.4% | 18.83% | −3.14 |
| FIS Fidelity National Info Serv | Sold out | 0.00% | −1.92 |
| MKL Markel Group Inc. | Reduce -2.9% | 15.19% | +0.13 |
| SPY SS SPDR S&P 500 ETF Trust-US | Reduce -5.0% | 15.92% | +0.31 |
| TRMB Trimble Inc. | Reduce -8.5% | 13.77% | +0.40 |
| MRCY Mercury Systems Inc. | Reduce -2.7% | 18.27% | +2.82 |
Portfolio Buys Q1 2025 → Q2 2025
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 10 | $1.9B | MRCY, COO, SPY, LW, FISV |
| Q1 2026Amended | 11 | $1.7B | MRCY, COO, FISV, SPY, LW |
| Q4 2025 | 12 | $1.9B | MRCY, COO, SPY, LW, MKL |
| Q3 2025 | 12 | $2.1B | MRCY, LW, MKL, SPY, COO |
| Q2 2025 | 10 | $2.0B | LW, MRCY, SPY, MKL, TRMB |
| Q1 2025 | 10 | $1.9B | LW, SPY, MRCY, MKL, TRMB |
| Q4 2024 | 10 | $1.9B | LW, TRMB, MRCY, SPY, MKL |
| Q3 2024 | 11 | $1.8B | TRMB, SPY, MRCY, LW, THS |
| Q2 2024 | 12 | $1.7B | FYBR, SPY, FIS, TRMB, MRCY |
| Q1 2024 | 10 | $1.8B | SPY, FIS, TRMB, FYBR, MRCY |