JANA Partners Management, LP
13F Reported Value
ⓘ$1.6B
Holdings
10
Latest Filing
2026-03-31
Filing Quarter
Q1 2026
Portfolio Overview
JANA Partners Management, LP disclosed 10 positions worth $1.6B in its Form 13F-HR for Q1 2026, led by $MRCY (MERCURY SYSTEMS INC) at 18.6% of the equity portfolio, followed by $COO and $FISV. During the quarter the fund opened 0 new positions and exited 2 and a full exit from $THS. The portfolio is most concentrated in Technology (26.3% of disclosed assets). All figures are sourced directly from JANA Partners Management, LP’s Form 13F-HR filing with the SEC under CIK 1998597.
AI Fund Analysis
ConcentratingSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q1 2026
Click any card to unlockTop Holdings
- 42.9#1,833
Quality
$299.5M4,107,424 sh - 55.8#1,140
Quality
$254.9M3,565,158 sh - 67.4#466
Quality
$247.5M4,435,605 sh - —
Quality
$223.5M343,665 sh - 54.2
Quality
$211.7M5,008,635 sh - 68.2
Quality
$144.1M75,307 sh - 46.1
Quality
$85.1M5,431,388 sh - 23.5
Quality
$73.1M4,116,099 sh - 52.4
Quality
$37.2M6,743,653 sh - 54.8
Quality
$29.5M2,090,412 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
 MERCURY SYSTEMS INC$MRCY | 42.9#1,833 | $299.5M | 4,107,424 |
 COOPER COMPANIES, INC.$COO | 55.8#1,140 | $254.9M | 3,565,158 |
 FISERV INC$FISV | 67.4#466 | $247.5M | 4,435,605 |
 SPDR S&P 500 ETF TRUST$SPY | — | $223.5M | 343,665 |
 Lamb Weston Holdings, Inc.$LW | 54.2 | $211.7M | 5,008,635 |
 MARKEL GROUP INC.$MKL | 68.2 | $144.1M | 75,307 |
 ALKAMI TECHNOLOGY, INC.$ALKT | 46.1 | $85.1M | 5,431,388 |
 Six Flags Entertainment Corporation/NEW$FUN | 23.5 | $73.1M | 4,116,099 |
 Rapid7, Inc.$RPD | 52.4 | $37.2M | 6,743,653 |
 Enhabit, Inc.$EHAB | 54.8 | $29.5M | 2,090,412 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of JANA Partners Management, LP's 10 positions.
Showing top 10 of 10 holdings.
Sector Allocation
Technology
$421.7M
Healthcare
$284.4M
Industrials
$247.5M
Other
$223.5M
Consumer Staples
$211.7M
Financials
$144.1M
Communication Services
$73.1M
Full Holdings — JANA Partners Management, LP (Q1 2026)
All 10 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $MRCY | MERCURY SYSTEMS INC | $299.5M | 18.6% | -17% | 42.9 |
| 2 | $COO | COOPER COMPANIES, INC. | $254.9M | 15.9% | +1% | 55.8 |
| 3 | $FISV | FISERV INC | $247.5M | 15.4% | +98% | 67.4 |
| 4 | $SPY | SPDR S&P 500 ETF TRUST | $223.5M | 13.9% | -12% | — |
| 5 | $LW | Lamb Weston Holdings, Inc. | $211.7M | 13.2% | +0% | 54.2 |
| 6 | $MKL | MARKEL GROUP INC. | $144.1M | 9.0% | -7% | 68.2 |
| 7 | $ALKT | ALKAMI TECHNOLOGY, INC. | $85.1M | 5.3% | +11% | 46.1 |
| 8 | $FUN | Six Flags Entertainment Corporation/NEW | $73.1M | 4.5% | +0% | 23.5 |
| 9 | $RPD | Rapid7, Inc. | $37.2M | 2.3% | +0% | 52.4 |
| 10 | $EHAB | Enhabit, Inc. | $29.5M | 1.8% | +0% | 54.8 |
Browse Top Institutional Investors
13F Pro tracks 8,700+ institutional investors filing 13F reports with the SEC.
to search all 8,700+ institutional filers.
Available Analysis
13F Pro tracks comprehensive institutional data for JANA Partners Management, LP including:
Track JANA Partners Management, LP's Full Portfolio
See every holding, quarter-over-quarter changes, sector allocation, and accumulation patterns for JANA Partners Management, LP and 8,700+ other institutional investors.
Free tier includes full 13F search and fund profiles. Pro starts at $6.67/mo (billed annually).
AI-Powered Hedge Fund Analysis: JANA Partners Management, LP
13F Pro is an AI hedge fund tracker and stock research platform. For JANA Partners Management, LP (SEC CIK: 1998597), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.
Every holding in JANA Partners Management, LP's portfolio is scored on a 32-signal AI quality ranking (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.