Institutional
JANA Partners Management, LP
CIK 0001998597
$1.61B
Reported AUM
10
Positions
Q1 2026
Period
2026-05-15
Filed
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%.
Portfolio · Q1 2026
Top holdings
| # | Stock | Issuer | Price | Day % | 1Y Gr. | 5Y Gr. | Value | % of book | Δ shares (QoQ) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | MRCY | MERCURY SYS INC | $95.97 | 6.43% | 72.84% | 78.98% | $299.5M | 18.65% | — | HELD |
| 2 | COO | COOPER COS INC | $72.65 | -0.56% | 2.51% | -35.50% | $254.9M | 15.87% | — | HELD |
| 3 | FISV | FISERV INC | $54.07 | -2.80% | -58.89% | -52.77% | $247.5M | 15.41% | — | HELD |
| 4 | SPY | STATE STR SPDR S&P 500 ETF T | $741.69 | 1.68% | 18.63% | 72.84% | $223.5M | 13.92% | — | HELD |
| 5 | LW | LAMB WESTON HLDGS INC | $53.55 | -0.80% | -2.12% | -10.06% | $211.7M | 13.18% | — | HELD |
| 6 | MKL | MARKEL GROUP INC | $1886.16 | -6.39% | -2.26% | 48.49% | $144.1M | 8.98% | — | HELD |
| 7 | ALKT | ALKAMI TECHNOLOGY INC | $17.81 | -2.84% | -13.62% | -38.03% | $85.1M | 5.30% | — | HELD |
| 8 | FUN | SIX FLAGS ENTERTAINMENT CORP | $17.70 | -3.54% | -40.38% | -57.60% | $73.1M | 4.55% | — | HELD |
| 9 | RPD | RAPID7 INC | $9.48 | 0.96% | -53.88% | -92.27% | $37.2M | 2.31% | — | HELD |
| 10 | EHABUSD | ENHABIT INC | — | — | — | — | $29.5M | 1.83% | — | HELD |
Source: SEC EDGAR · accession 0000902664-26-002515. 13F discloses long positions only — shorts, foreign equities, and options are excluded.