What Barry Rosenstein Bought in Q4 2025
JANA Partners · Quarterly 13F recap as filed with the SEC.
Period: 2025-12-31 · Filed · Historical
$1.92B
Total Value
12
Holdings
1
New Buys
2
Reduced
In Q4 2025, Barry Rosenstein reported 12 long equity positions worth $1.92B in their JANA Partners 13F filing, including 1 new positions (largest: FISERV INC at $150.8M) and 7 increased positions.
| Rank | Ticker | Company | Shares | Value | % Portfolio | Change |
|---|---|---|---|---|---|---|
| 1 | MRCY | MERCURY SYS INC | 4959481 | $362.1M | 18.84% | -16.8% |
| 2 | COO | COOPER COS INC | 3519620 | $288.5M | 15.01% | +44.6% |
| 3 | SPY | SPDR S&P 500 ETF | 391337 | $266.9M | 13.89% | +1.2% |
| 4 | LW | LAMB WESTON HLDGS INC | 5008635 | $209.8M | 10.92% | — |
| 5 | MKL | MARKEL GROUP INC | 81219 | $174.6M | 9.08% | +-44.9% |
| 6 | FISV | FISERV INC | 2245520 | $150.8M | 7.85% | NEW |
| 7 | THS | TREEHOUSE FOODS INC | 5821337 | $137.3M | 7.15% | — |
| 8 | ALKT | ALKAMI TECHNOLOGY INC | 4894665 | $112.9M | 5.88% | +158.6% |
| 9 | RPD | RAPID7 INC | 6743653 | $102.5M | 5.33% | +3.7% |
| 10 | FUN | SIX FLAGS ENTERTAINMENT CORP | 4116099 | $63.1M | 3.29% | +1.6% |
| 11 | FRPT | FRESHPET INC | 557390 | $34.0M | 1.77% | +-46.8% |
| 12 | EHAB | ENHABIT INC | 2090412 | $19.3M | 1.00% | -2.2% |