Holders — by stockHoldings — by fund
JANA Partners Management, LP
Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0001998597
$1.90B
disclosed book value
10
positions
25.5%
largest position share
Positions, as of 2026-06-30
top 10 of 10 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held
| # | Issuer | Shares | Value | % of book |
|---|---|---|---|---|
| 1 | MRCYMERCURY SYS INC | 4.0M | $484.3M | 25.5% |
| 2 | COOCOOPER COS INC | 3.6M | $256.9M | 13.5% |
| 3 | SPYSTATE STR SPDR S&P 500 ETF T | 342,965 | $256.1M | 13.5% |
| 4 | LWLAMB WESTON HLDGS INC | 5.4M | $232.9M | 12.2% |
| 5 | FISVFISERV INC | 3.7M | $179.6M | 9.4% |
| 6 | MKLMARKEL GROUP INC | 76,743 | $149.9M | 7.9% |
| 7 | ALKTALKAMI TECHNOLOGY INC | 6.7M | $122.3M | 6.4% |
| 8 | FUNSIX FLAGS ENTERTAINMENT CORP | 4.1M | $87.7M | 4.6% |
| 9 | PEVERPURE INC | 989,196 | $77.9M | 4.1% |
| 10 | RPDRAPID7 INC | 6.7M | $54.7M | 2.9% |
Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.