JANA Partners Management 13F, Q2 2026
JANA Partners · quarter ending 30 June 2026 · filed 14 August 2026 · SEC CIK 1998597
Common stock only: shares the fund reported owning at the quarter end, valued as filed.
Largest positions, Q2 2026
Weights are against the whole filed book. Changes are in shares held, against the Q1 2026 filing.
| Company | Ticker | Value | % of book | vs Q1 2026 |
|---|---|---|---|---|
| MERCURY SYS INC | MRCY | $484.29M | 25.5% | new |
| COOPER COS INC | COO | $256.90M | 13.5% | new |
| STATE STR SPDR S&P 500 ETF T | SPY | $256.12M | 13.5% | new |
| LAMB WESTON HLDGS INC | LW | $232.94M | 12.3% | new |
| FISERV INC | FISV | $179.63M | 9.4% | new |
| MARKEL GROUP INC | MKL | $149.88M | 7.9% | new |
| ALKAMI TECHNOLOGY INC | ALKT | $122.27M | 6.4% | new |
| SIX FLAGS ENTERTAINMENT CORP | FUN | $87.67M | 4.6% | new |
| EVERPURE INC | P | $77.94M | 4.1% | -5% shares |
| RAPID7 INC | RPD | $54.67M | 2.9% | new |
What changed since Q1 2026
Against the Q1 2026 filing, JANA Partners Management opened 9 new positions, added to 0, trimmed 1, left 0 unchanged and exited 0. Every position is compared, matched on its CUSIP; a change of 2% or less in shares counts as unchanged.
Other quarters
Source: SEC Form 13F-HR, accession 0000902664-26-003486, filed by JANA Partners Management, LP. Values are as filed and cover US-listed positions only; a 13F does not show short positions or holdings outside the US. A 13F may be filed up to 45 days after the quarter ends, so the fund may have traded since. Educational information, not financial advice.