Filed: 5/15/2026ACC: 0000902664-26-002515
📋 What this filing means
JANA PARTNERS MANAGEMENT, LP filed this quarterly 13F‑HR report disclosing 10 equity positions with a total reported market value of $1.61B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
10
Positions
$1.61B
Total AUM (reported)
35.92M
Total Shares
Allocation by class
COM$1.38B86.1%
TR UNIT$223.50M13.9%
Portfolio Concentration
Top 3$801.89M49.9%
4–10$804.09M50.1%
Top 3 weight
49.9%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 35.92M
Sole
Full voting authority
35.92M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole10
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings10
Rows:
MERCURY SYS INC
SOLEShares4.11M
TypeSH
Market value$299.47M
18.65%
Sole
4.11M
Shared
0.00
None
0.00
COOPER COS INC
SOLEShares3.57M
TypeSH
Market value$254.91M
15.87%
Sole
3.57M
Shared
0.00
None
0.00
FISERV INC
SOLEShares4.44M
TypeSH
Market value$247.51M
15.41%
Sole
4.44M
Shared
0.00
None
0.00
STATE STR SPDR S&P 500 ETF T
SOLEShares343.67K
TypeSH
Market value$223.50M
13.92%
Sole
343.67K
Shared
0.00
None
0.00
LAMB WESTON HLDGS INC
SOLEShares5.01M
TypeSH
Market value$211.66M
13.18%
Sole
5.01M
Shared
0.00
None
0.00
MARKEL GROUP INC
SOLEShares75.31K
TypeSH
Market value$144.14M
8.98%
Sole
75.31K
Shared
0.00
None
0.00
ALKAMI TECHNOLOGY INC
SOLEShares5.43M
TypeSH
Market value$85.11M
5.30%
Sole
5.43M
Shared
0.00
None
0.00
SIX FLAGS ENTERTAINMENT CORP
SOLEShares4.12M
TypeSH
Market value$73.06M
4.55%
Sole
4.12M
Shared
0.00
None
0.00
RAPID7 INC
SOLEShares6.74M
TypeSH
Market value$37.16M
2.31%
Sole
6.74M
Shared
0.00
None
0.00
ENHABIT INC
SOLEShares2.09M
TypeSH
Market value$29.45M
1.83%
Sole
2.09M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
MERCURY SYS INCSOLE | COM | 4.11M | SH | $299.47M 18.65% | 4.11M | 0.00 | 0.00 |
COOPER COS INCSOLE | COM | 3.57M | SH | $254.91M 15.87% | 3.57M | 0.00 | 0.00 |
FISERV INCSOLE | COM | 4.44M | SH | $247.51M 15.41% | 4.44M | 0.00 | 0.00 |
STATE STR SPDR S&P 500 ETF TSOLE | TR UNIT | 343.67K | SH | $223.50M 13.92% | 343.67K | 0.00 | 0.00 |
LAMB WESTON HLDGS INCSOLE | COM | 5.01M | SH | $211.66M 13.18% | 5.01M | 0.00 | 0.00 |
MARKEL GROUP INCSOLE | COM | 75.31K | SH | $144.14M 8.98% | 75.31K | 0.00 | 0.00 |
ALKAMI TECHNOLOGY INCSOLE | COM | 5.43M | SH | $85.11M 5.30% | 5.43M | 0.00 | 0.00 |
SIX FLAGS ENTERTAINMENT CORPSOLE | COM | 4.12M | SH | $73.06M 4.55% | 4.12M | 0.00 | 0.00 |
RAPID7 INCSOLE | COM | 6.74M | SH | $37.16M 2.31% | 6.74M | 0.00 | 0.00 |
ENHABIT INCSOLE | COM | 2.09M | SH | $29.45M 1.83% | 2.09M | 0.00 | 0.00 |