JANA Partners Management, LP reported 9 positions worth $1.65B for the quarter ended Jun 30, 2026, up 21.7% on the prior quarter. It opened 1 new position, added to 5, trimmed 2 and exited 0. Its largest holding is Mercury Systems Inc at 29.4% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Trade Value | Weight |
|---|---|---|---|
| P Everpure, Inc. | +989.2K | $77.94M | 4.73% |
| ALKT Alkami Technology, Inc. | +1.32M +24.2% | $23.85M | 7.43% |
| LW Lamb Weston Holdings, Inc. | +386.0K +7.7% | $16.67M | 14.15% |
| MKL Markel Group Inc. | +1,436 +1.9% | $2.80M | 9.1% |
| COO Cooper Companies, Inc. | +17.3K +0.5% | $1.24M | 15.61% |
| RPD Rapid7, Inc. | +6,283 +0.1% | $50.89K | 3.32% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| P Everpure, Inc. | +989.2K | $77.94M | 4.73% |
No positions were closed this quarter.
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | MRCY Mercury Systems Inc | Industrials | 3.96M | $484.29M | 29.42% | -148.6K | -3.6% | Reduced | 6.65% |
| 2 | COO Cooper Companies, Inc. | Healthcare | 3.58M | $256.90M | 15.61% | +17.3K | +0.5% | Added | 1.84% |
| 3 | LW Lamb Weston Holdings, Inc. | Consumer Staples | 5.39M | $232.94M | 14.15% | +386.0K | +7.7% | Added | 3.88% |
| 4 | FISV Fiserv Inc | Technology | 3.66M | $179.63M | 10.91% | -773.5K | -17.4% | Reduced | 0.69% |
| 5 | MKL Markel Group Inc. | Financial Services | 76.7K | $149.88M | 9.1% | +1,436 | +1.9% | Added | 0.61% |
| 6 | ALKT Alkami Technology, Inc. | Technology | 6.75M | $122.27M | 7.43% | +1.32M | +24.2% | Added | 6.31% |
| 7 | FUN Six Flags Entertainment Corporation | Consumer Discretionary | 4.12M | $87.67M | 5.33% | 0 | 0.0% | Unchanged | 4.02% |
| 8 | P Everpure, Inc. | Technology | 989.2K | $77.94M | 4.73% | +989.2K | – | New | 0.3% |
| 9 | RPD Rapid7, Inc. | Technology | 6.75M | $54.67M | 3.32% | +6,283 | +0.1% | Added | 10.03% |
Tip. Select a row to see that position’s full history at JANA Partners Management.
As of its Q2 2026 13F filing, JANA Partners Management, LP’s five largest positions were Mercury Systems Inc (MRCY) at 29.4%, Cooper Companies, Inc. (COO) at 15.6%, Lamb Weston Holdings, Inc. (LW) at 14.2%, Fiserv Inc (FISV) at 10.9%, Markel Group Inc. (MKL) at 9.1% of the reported portfolio.
JANA Partners Management, LP reported a 13F portfolio worth $1.65B across 9 positions for Q2 2026. That is up 21.7% from the previous quarter.
Its largest purchases by value were Everpure, Inc. ($77.94M), Alkami Technology, Inc. ($23.85M), Lamb Weston Holdings, Inc. ($16.67M). It opened 1 new positions.
Its largest sales by value were Fiserv Inc ($37.94M), Mercury Systems Inc ($18.18M). It exited 0 positions entirely.
From the Form 13F-HR reports JANA Partners Management, LP files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.