Featured 13F manager
JANA Partners Management, LP
New York, NY 14 processed 13Fs on this site · 2023 Q3–2026 Q2
- $1.9B
- 10 Positions
- 2026 Q2
- +18.4% QoQ
- Top 5 74.1%
Portfolio
top 5 74.1% · top 10 100.0%
- MRCY - Mercury Sys 25.5%
- COO - Cooper Cos 13.5%
- SPY 13.5%
- LW - Lamb Weston 12.2%
- FISV - Fiserv 9.4%
- MKL - Markel Group 7.9%
- ALKT - Alkami Technology 6.4%
- FUN - Six Flags Entertainment 4.6%
- PSTG - Pure Storage · CL A 4.1%
- RPD - Rapid7 2.9%
AUM over time
Book
| MRCY - Mercury Sys | 18.84% | Reduce −16.8% | 4,959,481 | $73.01 | $362M | −1,000,000 | −$99M |
| COO - Cooper Cos | 15.01% | Add +44.6% | 3,519,620 | $81.96 | $288M | +1,085,013 | +$122M |
| SPY - Spdr S&P 500 ETF Tr | 13.89% | Add +1.2% | 391,337 | $681.92 | $267M | +4,700 | +$9M |
| LW - Lamb Weston | 10.92% | Hold | 5,008,635 | $41.89 | $210M | — | — |
| MKL - Markel Group | 9.08% | Reduce −44.9% | 81,219 | $2,150 | $175M | −66,192 | −$107M |
| FISV - Fiserv | 7.85% | New | 2,245,520 | $67.17 | $151M | +2,245,520 | +$151M |
| Treehouse Foods | 7.15% | Hold | 5,821,337 | $23.59 | $137M | — | — |
| ALKT - Alkami Technology | 5.88% | Add +158.6% | 4,894,665 | $23.07 | $113M | +3,002,252 | +$66M |
| RPD - Rapid7 | 5.33% | Add +3.7% | 6,743,653 | $15.20 | $103M | +241,545 | −$19M |
| FUN - Six Flags Entertainment | 3.29% | Add +1.6% | 4,116,099 | $15.34 | $63M | +66,159 | −$29M |
| FRPT - Freshpet | 1.77% | Reduce −46.8% | 557,390 | $60.93 | $34M | −490,746 | −$24M |
| Enhabit | 1.00% | Reduce −2.2% | 2,090,412 | $9.22 | $19M | −46,733 | +$2M |
Exits / last held
not current holdings · last reported size, unchanged · gone vs 2025 Q3
| Stock | % of portfolio | Recent activity | Shares | Reported price* | Value | Share change | $ change |
|---|---|---|---|---|---|---|---|
| TRMB - Trimble | 7.44% | Exit | 0 | $81.65 | $154M | −1,881,399 | −$154M |
Filings history
12 periods · normalized AUM · open a period for holdings
| Period | Holdings | AUM | QoQ | Form | Filed | Filing ID |
|---|---|---|---|---|---|---|
| 2026 Q2 | 10 | $1.9B | +18.4% | 13F-HR | 8/14/2026 | 000090266426003486 |
| 2026 Q1 | 1 | $62M | — | NEW HOLDINGS | 6/30/2026 | 000090266426002957 |
| 2026 Q1 | 10 | $1.6B | −16.4% | 13F-HR | 5/15/2026 | 000090266426002515 |
| 2025 Q4 | 12 | $1.9B | −6.9% | 13F-HR | 2/17/2026 | 000090266426001069 |
| 2025 Q3 | 12 | $2.1B | +3.7% | 13F-HR | 11/14/2025 | 000090266425005066 |
| 2025 Q2 | 10 | $2B | +2.8% | 13F-HR | 8/14/2025 | 000090266425003587 |
| 2025 Q1 | 10 | $1.9B | −4.7% | 13F-HR | 5/15/2025 | 000090266425002348 |
| 2024 Q4 | 11 | $2B | +5.6% | 13F-HR | 2/14/2025 | 000090266425001058 |
| 2024 Q3 | 12 | $1.9B | +12.6% | 13F-HR | 11/14/2024 | 000090266424006510 |
| 2024 Q2 | 12 | $1.7B | −6.6% | 13F-HR | 8/14/2024 | 000090266424005100 |
| 2024 Q1 | 10 | $1.8B | +18.1% | 13F-HR | 5/15/2024 | 000090266424003586 |
| 2023 Q4 | 8 | $1.5B | +13.4% | 13F-HR | 2/14/2024 | 000090266424001588 |
| 2023 Q3 | 1 | $36M | — | NEW HOLDINGS | 11/16/2023 | 000090266423005626 |
| 2023 Q3 | 8 | $1.4B | — | 13F-HR | 11/14/2023 | 000090266423005550 |
About
JANA Partners Management, LP
14 processed 13Fs on this site · 2023 Q3–2026 Q2