Stocks/Funds/CIK 1998597

JANA Partners Management, LP

long-term holderconcentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1998597
Assets
$1.61B
-17.1% YoY
Holdings
10
Lifetime alpha vs market
-8.02% annual
Average hold time
1.6 yr
median 1.6 yr

Quarterly history

Cum return +27% vs S&P +57% · α -30% lifetimeAUM $1.6B · peak $2.1BFlow $-121M (-6%)2023-092024-032024-092025-032025-092026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+8.99%
adds when stocks drop
when a holding falls −10%+
Middle response
-4.97%
baseline attrition
Rally response
-7.63%
trims into rallies
when a holding rises +10%+

Top positions · 10

Ticker$ value% portYoYHold time
MRCYMercury Systems, Inc.$299M18.6%+69.2%2.8 yr
0I3I.LThe Cooper Companies, In$255M15.9%-15.3%0.8 yr
FIFiserv, Inc.$248M15.4%0.5 yr
SPYState Street SPDR S&P 50$223M13.9%+17.6%2.8 yr
LWLamb Weston Holdings, In$212M13.2%-18.5%1.8 yr
MKLMarkel Corporation$144M9.0%+2.4%1.5 yr
ALKTAlkami Technology, Inc.$85M5.3%-40.3%0.8 yr
$73M4.5%0.8 yr
RPDRapid7, Inc.$37M2.3%-79.2%2.0 yr
EHABEnhabit, Inc.$29M1.8%+60.3%2.8 yr

Portfolio composition (YoY)

Industry mix
Aerospace & Defense18.6%+3.2pp$299M
Medical - Instruments & Supplies15.9%$255M
Information Technology Services15.4%+13.5pp$248M
Asset Management13.9%-1.7pp$223M
Packaged Foods13.2%-18.8pp$212M
Insurance - Property & Casualty9.0%-6.1pp$144M
Software - Application5.3%$85M
Unknown4.5%$73M
Software - Infrastructure2.3%-3.3pp$37M
Medical - Care Facilities1.8%+0.9pp$29M
Country
US95.5%-4.5pp
Unknown4.5%
Top 5: 77.0% · Top 10: 100.0% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
MRCY$299M+0.21B69.2%
SPY$302M+0.05B17.6%
EHAB$19M+0.01B60.3%
MKL$292M+0.01B2.4%
LW$426M-0.08B-18.5%

Losers

TickerPrev $PnLYoY %
RPD$109M-0.09B-79.2%
LW$426M-0.08B-18.5%

Top buys this quarter · 3

ALKT Alkami Technology, Inc.+$85M
0I3I.L The Cooper Companies, Inc.+$255M
FI Fiserv, Inc.+$0M

Top sells this quarter · 5

MRCY Mercury Systems, Inc.$62M
FRPT Freshpet, Inc.exit$33M
SPY State Street SPDR S&P 500 ETF $31M
MKL Markel Corporation$11M
THS TreeHouse Foods, Inc.exit$0M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$1.61B10+3.15%+17.59%-14.44%-0.12B
2025-12-31$1.92B12+2.98%+17.72%-14.73%-0.09B
2025-09-30$2.07B12+12.88%+17.52%-4.64%-0.12B
2025-06-30$1.99B10+11.14%+14.94%-3.80%-0.09B
2025-03-31$1.94B10-1.85%+8.30%-10.15%+0.22B
2024-12-31$1.91B10+23.35%+24.89%-1.53%+0.02B
2024-09-30$1.78B11+28.96%+36.04%-7.08%-0.07B
2024-06-30$1.71B12-4.97%+4.38%-9.35%-0.03B
2024-03-31$1.83B10+12.76%+10.39%+2.37%+0.08B
2023-12-31$1.55B8+11.56%+11.64%-0.08%-0.01B
2023-09-30$1.40B9