Jana Partners
The positions Jana Partners reported on its Form 13F for Q2 2026, the quarter ending 30 Jun 2026, filed on 14 Aug 2026. Every figure below is the filing’s own: US-listed long equity, valued at the quarter end, with the change measured against the same manager’s previous filing.
What Jana Partners wrote
Letters & Theses2 reviewed claims from Jana Partners’s letters: what it argued, company by company, beside what it owns.
Reported book is the quarter-end market value of the securities on the 13F, mostly US-listed long equity. It is not the manager’s assets under management: shorts, cash, leverage and most non-US or private holdings sit outside it.
Opened this quarter
A new position is the clearest thing a filing says. Somebody argued for it recently, and it is the easiest question to be ready for.
Nothing new. The book is the same set of names it held last quarter.
Sold out of this quarter
Exits are valued at what the position was worth in the previous filing, because by this one it is gone.
- Enhabit Inc (EHAB)$30m held before
Every reported position, Q2 2026
10 positions, sorted by weight
| Position | Weight ↓ | Value | Shares | Change on the quarter | Action |
|---|---|---|---|---|---|
| Mercury Sys Inc (MRCY) CUSIP 589378108 | 25% | $484m | 3,958,849 | +$185m -148,575 shares | Trimmed |
| Cooper Cos Inc (COO) CUSIP 216648501 | 14% | $257m | 3,582,480 | +$2.0m +17,322 shares | Added |
| State Street SPDR S&P 500 ETF (SPY) CUSIP 78462F103 | 13% | $256m | 342,965 | +$33m -700 shares | Trimmed |
| Lamb Weston HLDGS Inc (LW) CUSIP 513272104 | 12% | $233m | 5,394,635 | +$21m +386,000 shares | Added |
| Fiserv Inc (FISV) CUSIP 337738108 | 9.4% | $180m | 3,662,080 | -$68m -773,525 shares | Trimmed |
| Markel Group Inc (MKL) CUSIP 570535104 | 7.9% | $150m | 76,743 | +$5.7m +1,436 shares | Added |
| Alkami Technology Inc (ALKT) CUSIP 01644J108 | 6.4% | $122m | 6,747,707 | +$37m +1,316,319 shares | Added |
| Six Flags Entertainment Corp (FUN) CUSIP 83001C108 | 4.6% | $88m | 4,116,099 | +$15m 0 shares | Held |
| Everpure Inc (P) Class A · CUSIP 74624M102 | 4.1% | $78m | 989,196 | +$16m -53,100 shares | Trimmed |
| Rapid7 Inc (RPD) CUSIP 753422104 | 2.9% | $55m | 6,749,936 | +$18m +6,283 shares | Added |
Every filing on file
| Quarter | Period end | Filed | Book | Positions | Top 10 | Filing |
|---|---|---|---|---|---|---|
| Q2 2026 | 30 Jun 2026 | 14 Aug 2026 | $1.9bn | 10 | 100% | 13F-HR |
| Q1 2026 | 31 Mar 2026 | 15 May 2026 | $1.7bn | 11 | 98% | 13F-HR |
| Q4 2025 | 31 Dec 2025 | 17 Feb 2026 | $1.9bn | 12 | 97% | 13F-HR |
| Q3 2025 | 30 Sept 2025 | 14 Nov 2025 | $2.1bn | 12 | 97% | 13F-HR |
| Q2 2025 | 30 Jun 2025 | 14 Aug 2025 | $2.0bn | 10 | 100% | 13F-HR |
| Q1 2025 | 31 Mar 2025 | 15 May 2025 | $1.9bn | 10 | 100% | 13F-HR |
| Q4 2024 | 31 Dec 2024 | 14 Feb 2025 | $2.0bn | 11 | 99% | 13F-HR |
| Q3 2024 | 30 Sept 2024 | 14 Nov 2024 | $1.9bn | 12 | 98% | 13F-HR |
Taking this into the room
Pick one name from the top of the book and one from the new positions, and know both properly: what the company earns, what it is priced at, and what has to be true for the position to work. That is a conversation. Reciting the whole table is not, and the interviewer wrote it.
A position sold out of is worth as much preparation as one opened. Ask what changed rather than asserting the fund was wrong, and be ready for the answer that the thesis played out and the money went somewhere better.
What this filing leaves out
A 13F covers US-listed long equity at one moment in time. Shorts, bonds, cash, private positions and non-US listings never appear, and options are reported in a form that will mislead you if you read them as a position. A long/short manager showing $8bn here may run a book several times that size.
The lag matters too. Positions are as at the quarter end and the filing arrives up to forty-five days later, so what you are reading is at least six weeks old and possibly four months. Phrase it as what the filing showed, not what the fund holds today.
You have read the book. Now have a view on one name
Pick a position, work out what it is worth, and be ready to defend it. That is the difference between a candidate who read the filing and one who did something with it.
Company names, tickers and logos are the trademarks of their respective owners and appear here to identify the company whose public figures are being used. L3VLUP is not affiliated with, sponsored by or endorsed by any company shown, and nothing here is a statement by or about that company. More
This manager, next quarter, and the week between
One email a week on what moved in the market, with the 13F changes the quarter they are filed.
One email a week, free, and you can leave at any point.