Skip to content
mapperlab
← Search

JANA PARTNERS LLC

Activist
CIK 115915993 13F filings on recordNew York, NY~$3B

Barry Rosenstein's activist fund known for engineering M&A transactions and strategic reviews at undervalued companies.

Principal · Barry RosensteinFounded · 2001
$10k mirror, since 2013
Mirror return
+125%
View backtest & performance →

Top current holdings · Q2 2023

All 9 positions →(complete portfolio)
#IssuerValue% PortShares
1
FRPT · 358039105
$282.3M21.09%4,289,586
2
THS · 89469A104
$239.5M17.90%4,753,914
3
NEWREUR · 64829B100
$210.22M15.71%3,212,444
4
FIS · 31620M106
$202.09M15.10%3,694,474
5
MRCY · 589378108
$152.01M11.36%4,394,641
6
SPY · 78462F103
$98.02M7.32%221,133
7
LABORATORY CORP AMER HLDGS
50540R409
$97M7.25%401,935
8
LDOS · 525327102
$28.75M2.15%324,930
9
EHAB · 29332G102
$28.46M2.13%2,474,398
Top 10 are 100.0% of the portfolio · filing total $1.34B

5%+ ownership filings

SC 13D / 13G · activist or passive 5%+ stakes

Filed whenever this investor crosses 5% ownership of a public company's voting equity. SC 13D = active (intent to influence management). SC 13G= passive. Amendments (…/A) follow each subsequent material change. These often precede 13F disclosure by weeks and are the canonical activism signal.

Showing 25 of 440 recent ownership filings. Browse all on EDGAR ↗

Quarterly filings

Open latest →