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Jana Partners Management, LP 13F holdings, Q1 2026

Holdings as of March 31, 2026 · filings on SEC EDGAR · latest filing →

Jana Partners Management, LP disclosed 11 US equity positions worth $1.7bn in its Q1 2026 13F filing. The largest position was MRCY at 18.0% of the reported book, followed by COO and FISV.

· Q2 2026 →

What did Jana Partners Management, LP own in Q1 2026? Top 11 positions

#StockSectorWeightValueSharesΔ sharesvs prior
1 MRCY MERCURY SYS INC Industrials 18.0%$299.5m4,107,424
2 COO COOPER COS INC Healthcare 15.3%$254.9m3,565,158
3 FISV FISERV INC 14.8%$247.5m4,435,605
4 SPY STATE STR SPDR S&P 500 ETF T 13.4%$223.5m343,665
5 LW LAMB WESTON HLDGS INC Consumer Defensive 12.7%$211.7m5,008,635
6 MKL MARKEL GROUP INC Financial Services 8.6%$144.1m75,307
7 ALKT ALKAMI TECHNOLOGY INC Technology 5.1%$85.1m5,431,388
8 FUN SIX FLAGS ENTERTAINMENT CORP Consumer Cyclical 4.4%$73.1m4,116,099
9 P EVERPURE INC Technology 3.7%$61.5m1,042,296
10 RPD RAPID7 INC Technology 2.2%$37.2m6,743,653
11 ENHABIT INC 1.8%$29.5m2,090,412

Weights are shares of the reported long US equity book (options excluded). Values are as filed, normalised to whole dollars. Share changes compare against the immediately preceding filing only.