JANA Partners Management, LP 13F holdings, Q4 2025
Holdings as of December 31, 2025 · filings on SEC EDGAR · latest filing →
JANA Partners Management, LP disclosed 12 US equity positions worth $1.9bn in its Q4 2025 13F filing. The largest position was MRCY at 18.8% of the reported book, followed by COO and SPY. Against the Q3 2025 filing, it opened 1 new position, added to 5 and reduced 4 among the top 12 holdings.
What did JANA Partners Management, LP own in Q4 2025? Top 12 positions
| # | Stock | Sector | Weight | Value | Shares | Δ shares | vs Q3 2025 |
|---|---|---|---|---|---|---|---|
| 1 | MRCY MERCURY SYS INC | Industrials | 18.8% | $362.1m | 4,959,481 | -17% | reduced |
| 2 | COO COOPER COS INC | Healthcare | 15.0% | $288.5m | 3,519,620 | 45% | added |
| 3 | SPY SPDR S&P 500 ETF TR | 13.9% | $266.9m | 391,337 | 1% | added | |
| 4 | LW LAMB WESTON HLDGS INC | Consumer Defensive | 10.9% | $209.8m | 5,008,635 | 0% | held |
| 5 | MKL MARKEL GROUP INC | Financial Services | 9.1% | $174.6m | 81,219 | -45% | reduced |
| 6 | FISV FISERV INC | 7.8% | $150.8m | 2,245,520 | – | new | |
| 7 | THS TREEHOUSE FOODS INC | 7.1% | $137.3m | 5,821,337 | 0% | held | |
| 8 | ALKT ALKAMI TECHNOLOGY INC | Technology | 5.9% | $112.9m | 4,894,665 | 159% | added |
| 9 | RPD RAPID7 INC | Technology | 5.3% | $102.5m | 6,743,653 | 4% | added |
| 10 | FUN SIX FLAGS ENTERTAINMENT CORP | 3.3% | $63.1m | 4,116,099 | 2% | added | |
| 11 | FRPT FRESHPET INC | Consumer Defensive | 1.8% | $34.0m | 557,390 | -47% | reduced |
| 12 | ENHABIT INC | 1.0% | $19.3m | 2,090,412 | -2% | reduced |
Weights are shares of the reported long US equity book (options excluded). Values are as filed, normalised to whole dollars. Share changes compare against the immediately preceding filing only.