Institutional Manager · CIK 0001998597
JANA Partners Management, LP
New York, NY · File #028-23453
Latest AUM
$1.92B
Positions
12
Top-10 Concentration
97.2%
Filings
10
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| EXITED | TRIMBLE INC | 896239100 | -1,881,399 | -$153.6M | $0 |
| NEW | FISERV INC | FISV | +2,245,520 | +$150.8M | $0 |
| REDUCE | MARKEL GROUP INC | MKL | -66,192 | -$142.3M | +$35.1M |
| ADD | COOPER COS INC | 216648501 | +1,085,013 | +$88.9M | +$32.6M |
| REDUCE | MERCURY SYS INC | MRCY | -1,000,000 | -$73.0M | -$26.2M |
| ADD | ALKAMI TECHNOLOGY INC | ALKT | +3,002,252 | +$69.3M | -$3.3M |
| REDUCE | FRESHPET INC | FRPT | -490,746 | -$29.9M | +$6.1M |
| ADD | RAPID7 INC | RPD | +241,545 | +$3.7M | -$23.1M |
| ADD | SPDR S&P 500 ETF TR | SPY | +4,700 | +$3.2M | +$6.1M |
| ADD | SIX FLAGS ENTERTAINMENT CORP | FUN | +66,159 | +$1.0M | -$29.9M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202512 pos · $1.92B
- 13F HOLDINGS REPORTQ/E Sep 202512 pos · $2.07B
- 13F HOLDINGS REPORTQ/E Jun 202510 pos · $1.99B
- 13F HOLDINGS REPORTQ/E Mar 202510 pos · $1.94B
- 13F HOLDINGS REPORTQ/E Dec 202411 pos · $2.03B
- 13F HOLDINGS REPORTQ/E Sep 202412 pos · $1.93B
- 13F HOLDINGS REPORTQ/E Jun 202412 pos · $1.71B
- 13F HOLDINGS REPORTQ/E Mar 202410 pos · $1.83B
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20231 pos · $35.7M
- 13F HOLDINGS REPORTQ/E Dec 20238 pos · $1.37B
Top 12 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | MERCURY SYS INC | MRCY | 4,959,481 | $362.1M | 18.84% |
| 2 | COOPER COS INC | 216648501 | 3,519,620 | $288.5M | 15.01% |
| 3 | SPDR S&P 500 ETF TR | SPY | 391,337 | $266.9M | 13.89% |
| 4 | LAMB WESTON HLDGS INC | LW | 5,008,635 | $209.8M | 10.92% |
| 5 | MARKEL GROUP INC | MKL | 81,219 | $174.6M | 9.08% |
| 6 | FISERV INC | FISV | 2,245,520 | $150.8M | 7.85% |
| 7 | TREEHOUSE FOODS INC | 89469A104 | 5,821,337 | $137.3M | 7.15% |
| 8 | ALKAMI TECHNOLOGY INC | ALKT | 4,894,665 | $112.9M | 5.88% |
| 9 | RAPID7 INC | RPD | 6,743,653 | $102.5M | 5.33% |
| 10 | SIX FLAGS ENTERTAINMENT CORP | FUN | 4,116,099 | $63.1M | 3.29% |
| 11 | FRESHPET INC | FRPT | 557,390 | $34.0M | 1.77% |
| 12 | ENHABIT INC | EHAB | 2,090,412 | $19.3M | 1.00% |