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Jana Partners
Portfolio: Top Holdings & Stock Picks

Jana Partners Management, Lp

Activist Investing Special Situations / Event-Driven

Jana Partners (Jana Partners Management, Lp) disclosed 12 total holdings in its latest 13F filing dated 12/31/2025, with a portfolio value of $1.92 B and a turnover rate of 15.9%.

Portfolio Value
$1.92 B
Total Holdings
12
Latest Filing
Q4 2025
February 17, 2026
Turnover Rate
15.9%

Jana Partners Top Holdings of Q4 2025

Ticker Name Shares Value % of Portfolio Time Held % Change
4.96 M $362.09 M 18.84% 4.3 Years -16.78%
COO
3.52 M $288.47 M 15.01% 0.25 Years +44.57%
391,337 $266.86 M 13.89% 7.8 Years +1.22%
LW
5.01 M $209.81 M 10.92% 1.3 Years 0.00%
MKL
81,219 $174.59 M 9.08% 1 Years -44.90%
FI
2.25 M $150.83 M 7.85% New Buy +100.00%
THS
5.82 M $137.33 M 7.15% 5 Years 0.00%
4.89 M $112.92 M 5.88% 0.25 Years +158.65%
RPD
6.74 M $102.5 M 5.33% 1.5 Years +3.71%
FUN
4.12 M $63.14 M 3.29% 0.25 Years +1.63%

Recent Moves

Significant New Position
+2.25 M Shares | +$150.83 M Value
Continues to build a major stake in the Technology sector
Q4 2025
Added to Core Holding
+1.09 M Shares | +$88.93 M Value
Largest position increase in Healthcare sector
Q4 2025
Reduced Exposure to Position
-66,192 Shares | -$142.29 M Value
Significant reduction in holdings of Financials
Q4 2025
Complete Exit
-1.88 M Shares | -$153.62 M Value
Cleared TRMB, sector remains in portfolio
Q4 2025

Jana Partners's Historical Top Holdings Overview

Portfolio Date:

Jana Partners Top Stock Picks

Ticker Name Date Activity Shares Shares Change Value Change
12/31/2025 Sold Out 0 -1.88 M $153.62 M
FI
12/31/2025 New Buy 2.25 M 2.25 M $150.83 M
MKL
12/31/2025 Reduce -44.9% 81,219 -66,192 $142.29 M
COO
12/31/2025 Add 44.6% 3.52 M 1.09 M $88.93 M
12/31/2025 Reduce -16.8% 4.96 M -1 M $73.01 M
12/31/2025 Add 158.7% 4.89 M 3 M $69.26 M
12/31/2025 Reduce -46.8% 557,390 -490,746 $29.9 M
RPD
12/31/2025 Add 3.7% 6.74 M 241,545 $3.67 M
SPY
12/31/2025 Add 1.2% 391,337 4,700 $3.21 M
FUN
12/31/2025 Add 1.6% 4.12 M 66,159 $1.01 M

Jana Partners's Portfolio Sector Breakdown

Portfolio Date:

About Jana Partners

JANA Partners LLC is an investment management firm founded by Barry Rosenstein. It is one of the most well-known activist hedge funds in the market. The firm is known for taking significant stakes in public companies and publicly advocating for corporate actions to improve their financial performance and stock price. Rosenstein and his team have a long track record of successful activist campaigns.

Frequently Asked Questions

As of 12/31/2025, Jana Partners holds 12 stocks. Top positions include MRCY, COO, SPY, LW, MKL. For full portfolio details, please visit Jana Partners’s portfolio.

In Q4 2025, Jana Partners’s largest purchase by dollar amount was FI. For complete transaction details, please visit Jana Partners’s portfolio.

According to the 13F filing for Q4 2025, Jana Partners increased their stake in COO.

Jana Partners's firm may occasionally request confidential treatment under SEC rule 13F-HR, which allows temporary non-disclosure of certain positions.