JANA Partners
Barry RosensteinNEW YORK, NYfiles as JANA Partners Management, LP
$1.9bn in 10 US stocks at the end of 30 June 2026. The top 10 are 100.0% of the money. It changed about 10.2% of the portfolio this quarter.
Value
$1.9bn
Stocks
10
Top 10 share
100.0%
Turnover
10.2%
What changed this quarter
New
Bought for the first time this quarter.
None this quarter.
Added
Bought more of a stock they already held.
- Lamb Weston HoldingsLW12.2% of the fund+8%
- Alkami TechnologyALKT6.4% of the fund+24%
Cut
Sold some of their stake.
- Mercury SystemsMRCY25.5% of the fund-4%
- FiservFISV9.4% of the fund-17%
- EverpureP4.1% of the fund-5%
Sold out
Sold their entire stake.
- Enhabit-100%
Holdings
- State STR Spdr S&P 500 ETF TSPY
- Share
- 13.5%
- Value
- $256m
- Shares
- 342,965
Held
| Company | Share of fund | Value | Shares | Change |
|---|---|---|---|---|
| Mercury SystemsMRCY | 25.5% | $484m | 3,958,849 | -4% |
| Cooper CompaniesCOO | 13.5% | $257m | 3,582,480 | Held |
| State STR Spdr S&P 500 ETF TSPY | 13.5% | $256m | 342,965 | Held |
| Lamb Weston HoldingsLW | 12.2% | $233m | 5,394,635 | +8% |
| FiservFISV | 9.4% | $180m | 3,662,080 | -17% |
| Markel GroupMKL | 7.9% | $150m | 76,743 | Held |
| Alkami TechnologyALKT | 6.4% | $122m | 6,747,707 | +24% |
| Six Flags EntertainmentFUN | 4.6% | $88m | 4,116,099 | Held |
| EverpureP | 4.1% | $78m | 989,196 | -5% |
| Rapid7RPD | 2.9% | $55m | 6,749,936 | Held |
Over time and by industry
Value over time
Jun '25
Dec '25
Jun '26
Value is down 4.5% since 30 June 2025.
Where the money is
Technology38.9%
Financial services17.3%
Health care13.5%
Everyday goods12.2%
Retail & consumer4.6%
Other13.5%
From the fund's 13F filings. They list US stocks and options only, 45 days after each quarter, and leave out cash, bonds, shorts and foreign shares.