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Jana Partners

Barry RosensteinCIK 1998597

View 13F filings on EDGAR ↗
Equity portfolio value
$1.9B
Positions
10
New positions
1
Exited
1

Q2 2026 13F holdings (quarter-end June 30, 2026) vs. Q1 2026— equity positions only. Company names link to the stock's signal page where a convergence signal exists.

Recent 13D/13G Filings (6)

Beneficial-ownership filings are made within days of a 5%+ position change — a fresher view than the quarterly 13F snapshot below. Coverage reflects filings made under this fund's primary SEC identity.

IssuerFormShares∆ Shares% of ClassFiledSrc
ALKAMI TECHNOLOGY, INC.ALKTSC 13D6.7M+1.4M6.3%2026-06-29
ALKAMI TECHNOLOGY, INC.ALKTSC 13D/A5.3M92K5.0%2026-05-12
ALKAMI TECHNOLOGY, INC.ALKTSC 13D5.4MNEW5.1%2026-04-01
Rapid7, Inc.RPDSC 13D/A6.8M10.3%2026-03-30
MERCURY SYSTEMS INCMRCYSC 13D/A4.1M6.9%2026-03-04
TreeHouse Foods, Inc.THSSC 13D/A0.0%2026-02-11

New Positions (1)

CompanySharesValue% of Book
EVERPURE INC989K$78M4.1%

Added To (5)

CompanyShares∆ SharesValue% of Book
COOPER COS INC3.6M+17K$257M13.5%
LAMB WESTON HLDGS INC5.4M+386K$233M12.2%
MARKEL GROUP INC77K+1K$150M7.9%
ALKAMI TECHNOLOGY INC6.7M+1.3M$122M6.4%
RAPID7 INC6.7M+6K$55M2.9%

Reduced / Exited (4)

Exits show the prior-quarter position value — what was sold off. % of Book for exits is relative to the prior-quarter portfolio.

CompanyShares∆ SharesValue% of Book
MERCURY SYS INC4.0M−149K$484M25.5%
STATE STR SPDR S&P 500 ETF T343K−700$256M13.5%
FISERV INC3.7M−774K$180M9.4%
ENHABIT INCEXITED0−2.1M$29M1.8%

Top Holdings (10)

CompanySharesValue% of Book
MERCURY SYS INC4.0M$484M25.5%
COOPER COS INC3.6M$257M13.5%
STATE STR SPDR S&P 500 ETF T343K$256M13.5%
LAMB WESTON HLDGS INC5.4M$233M12.2%
FISERV INC3.7M$180M9.4%
MARKEL GROUP INC77K$150M7.9%
ALKAMI TECHNOLOGY INC6.7M$122M6.4%
SIX FLAGS ENTERTAINMENT CORP4.1M$88M4.6%
EVERPURE INC989K$78M4.1%
RAPID7 INC6.7M$55M2.9%