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JANA Partners Management, LP

New York, NY 14 processed 13Fs on this site, 2023 Q3 to 2026 Q2

  • $1.9B
  • 10 holdings
  • 2026 Q2
  • +18.4% QoQ
  • Top 5 74.1%

Portfolio

2026 Q2, filed 8/14/2026, 10 holdings

Top 5 74.1%, top 10 100.0%

  1. MRCY, Mercury Systems 25.5%
  2. COO, Cooper Companies 13.5%
  3. SPY, SPDR S&P 500 ETF Trust 13.5%
  4. LW, Lamb Weston 12.2%
  5. FISV, Fiserv 9.4%
  6. MKL, Markel Group 7.9%
  7. ALKT, Alkami Technology 6.4%
  8. FUN, Six Flags Entertainment 4.6%
  9. PSTG, Pure Storage 4.1%
  10. RPD, Rapid7 2.9%

AUM over time

2026 Q2 $1.9B +18.4% QoQ
2023 Q3: $1.4B 2023 Q3: $1.4B
Q3 2023
2023 Q4: $1.5B, +13.4% QoQ 2023 Q4: $1.5B, +13.4% QoQ
Q4
2024 Q1: $1.8B, +18.1% QoQ 2024 Q1: $1.8B, +18.1% QoQ
Q1 2024
2024 Q2: $1.7B, −6.6% QoQ 2024 Q2: $1.7B, −6.6% QoQ
Q2
2024 Q3: $1.9B, +12.6% QoQ 2024 Q3: $1.9B, +12.6% QoQ
Q3
2024 Q4: $2B, +5.6% QoQ 2024 Q4: $2B, +5.6% QoQ
Q4
2025 Q1: $1.9B, −4.7% QoQ 2025 Q1: $1.9B, −4.7% QoQ
Q1 2025
2025 Q2: $2B, +2.8% QoQ 2025 Q2: $2B, +2.8% QoQ
Q2
2025 Q3: $2.1B, +3.7% QoQ 2025 Q3: $2.1B, +3.7% QoQ
Q3
2025 Q4: $1.9B, −6.9% QoQ 2025 Q4: $1.9B, −6.9% QoQ
Q4
2026 Q1: $1.6B, −16.4% QoQ 2026 Q1: $1.6B, −16.4% QoQ
Q1 2026
2026 Q2: $1.9B, +18.4% QoQ 2026 Q2: $1.9B, +18.4% QoQ
Q2

Book

2024 Q4 2024 Q3, filed 14 Feb, long equity only

Download CSV Download Excel All activity
LW, Lamb Weston 23.44%, was 11.85% Add +102.2% 7,131,339 $66.83 $477M +3,604,585 +$248M
TRMB, Trimble 14.52%, was 15.73% Reduce −14.4% 4,178,088 $70.66 $295M −702,856 −$7.8M
MRCY, Mercury Systems 14.34% Hold 6,941,565 $42.00 $292M — —
SPY, SPDR S&P 500 ETF Trust 12.37%, was 14.27% Reduce −10.4% 429,263 $586.08 $252M −49,700 −$23M
MKL, Markel Group 9.25% New 108,926 $1,726 $188M +108,926 +$188M
Treehouse Foods 8.49% Hold 4,910,950 $35.13 $173M — —
RPD, Rapid7 7.30% Add +0.9% 3,690,129 $40.23 $148M +34,589 +$2.6M
FIS, Fidelity National Information Services 1.97%, was 6.90% Reduce −68.7% 496,895 $80.77 $40M −1,090,034 −$93M
Wolfspeed 1.63%, was 3.10% Reduce −19.1% 4,988,216 $6.66 $33M −1,177,717 −$27M
Enhabit 0.82% Hold 2,137,145 $7.81 $17M — —

Exits / last held

Gone since 2024 Q3, shown at their last reported size.

Stock % of portfolio Recent activity Shares Reported price* Value Share change $ change
Holding 7.21% Exit 0 $35.53 $139M −3,910,213 −$139M
FTRE, Fortrea 0.72% Exit 0 $20.00 $14M −692,408 −$14M

Weight bar: held both quarters added sold at this quarter’s reported price

* Reported price is value ÷ shares from the 13F as of period end, not a live market quote. Weight % is each long-equity position ÷ full 13F AUM, so rows may not sum to 100% when the filing includes options or other non-equity (excluded from this table). Share change and $ change are vs 2024 Q3. Click a column header to sort, or New, Hold, Add or Reduce to bring those moves to the top. Exit opens the last-held block below.

Filings history

12 periods, with AUM normalized

Newest 13Fs
Period Holds AUM QoQ Form Filed Filing ID
2026 Q2 10 $1.9B +18.4% 13F-HR 8/14/2026 000090266426003486
2026 Q1 1 $62M — new holds 6/30/2026 000090266426002957
2026 Q1 10 $1.6B −16.4% 13F-HR 5/15/2026 000090266426002515
2025 Q4 12 $1.9B −6.9% 13F-HR 2/17/2026 000090266426001069
2025 Q3 12 $2.1B +3.7% 13F-HR 11/14/2025 000090266425005066
2025 Q2 10 $2B +2.8% 13F-HR 8/14/2025 000090266425003587
2025 Q1 10 $1.9B −4.7% 13F-HR 5/15/2025 000090266425002348
2024 Q4 11 $2B +5.6% 13F-HR 2/14/2025 000090266425001058
2024 Q3 12 $1.9B +12.6% 13F-HR 11/14/2024 000090266424006510
2024 Q2 12 $1.7B −6.6% 13F-HR 8/14/2024 000090266424005100
2024 Q1 10 $1.8B +18.1% 13F-HR 5/15/2024 000090266424003586
2023 Q4 8 $1.5B +13.4% 13F-HR 2/14/2024 000090266424001588
2023 Q3 1 $36M — new holds 11/16/2023 000090266423005626
2023 Q3 8 $1.4B — 13F-HR 11/14/2023 000090266423005550

About

JANA Partners Management, LP

14 processed 13Fs on this site, 2023 Q3 to 2026 Q2

SEC filing name
JANA Partners Management, LP
Location
New York, NY
All SEC filings
View on sec.gov