Q1 2026 · 13F-HR
JANA Partners Management, LPholdings as filed
Filed 2026-05-15 · accession 0000902664-26-002515
$1.61B
Reported value
10
Positions
2026-03-31
Period end
The Brief · JANA Partners Management, LP · Q1 2026
AI · grounded in 13F
JANA Partners Management, LP exited its position in TreeHouse Foods Inc THS, reducing its holdings by $137.3M. The fund also closed its position in Freshpet Inc FRPT, resulting in a $33.9M decrease. Conversely, the fund increased its stake in Fiserv Inc FISV by 97.5%. Other activity included trimming positions in Mercury Sys Inc MRCY by 17.2% and State Str SPDR S&P 500 ETF T SPY by 12.2%.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 589378108 | MRCY | MERCURY SYS INC | $299.5M | 18.6% | 4,107,424 | Common | SOLE |
| 216648501 | COO | COOPER COS INC | $254.9M | 15.9% | 3,565,158 | Common | SOLE |
| 337738108 | FISV | FISERV INC | $247.5M | 15.4% | 4,435,605 | Common | SOLE |
| 78462F103 | SPY | STATE STR SPDR S&P 500 ETF T | $223.5M | 13.9% | 343,665 | Common | SOLE |
| 513272104 | LW | LAMB WESTON HLDGS INC | $211.7M | 13.2% | 5,008,635 | Common | SOLE |
| 570535104 | MKL | MARKEL GROUP INC | $144.1M | 8.98% | 75,307 | Common | SOLE |
| 01644J108 | ALKT | ALKAMI TECHNOLOGY INC | $85.1M | 5.30% | 5,431,388 | Common | SOLE |
| 83001C108 | FUN | SIX FLAGS ENTERTAINMENT CORP | $73.1M | 4.55% | 4,116,099 | Common | SOLE |
| 753422104 | RPD | RAPID7 INC | $37.2M | 2.31% | 6,743,653 | Common | SOLE |
| 29332G102 | EHABUSD | ENHABIT INC | $29.5M | 1.83% | 2,090,412 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.